/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/ps6-ll_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 13:25:47,728 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 13:25:47,729 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 13:25:47,778 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 13:25:47,778 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 13:25:47,779 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 13:25:47,781 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 13:25:47,782 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 13:25:47,784 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 13:25:47,784 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 13:25:47,785 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 13:25:47,786 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 13:25:47,786 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 13:25:47,791 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 13:25:47,793 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 13:25:47,798 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 13:25:47,799 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 13:25:47,805 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 13:25:47,811 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 13:25:47,812 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 13:25:47,814 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 13:25:47,819 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 13:25:47,820 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 13:25:47,820 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 13:25:47,822 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 13:25:47,829 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 13:25:47,836 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 13:25:47,836 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 13:25:47,842 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 13:25:47,842 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-06 13:25:47,874 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 13:25:47,875 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 13:25:47,876 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-06 13:25:47,876 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-06 13:25:47,877 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-06 13:25:47,877 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-06 13:25:47,877 INFO L138 SettingsManager]: * Use SBE=true [2022-04-06 13:25:47,877 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 13:25:47,877 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 13:25:47,878 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 13:25:47,879 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 13:25:47,879 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 13:25:47,879 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 13:25:47,879 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 13:25:47,879 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 13:25:47,879 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 13:25:47,879 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 13:25:47,879 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 13:25:47,880 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 13:25:47,880 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 13:25:47,880 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 13:25:47,880 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-06 13:25:47,880 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-06 13:25:47,880 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 13:25:47,880 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-06 13:25:47,881 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 13:25:47,881 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-06 13:25:47,881 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-06 13:25:47,883 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 13:25:47,883 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 13:25:48,103 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 13:25:48,124 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 13:25:48,126 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 13:25:48,127 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 13:25:48,128 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 13:25:48,129 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_unwindbound20.c [2022-04-06 13:25:48,187 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2bdc3b403/9d6ef20396114eb3a3f20ad3c39c2099/FLAGcdab50dca [2022-04-06 13:25:48,557 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 13:25:48,557 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_unwindbound20.c [2022-04-06 13:25:48,562 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2bdc3b403/9d6ef20396114eb3a3f20ad3c39c2099/FLAGcdab50dca [2022-04-06 13:25:48,575 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2bdc3b403/9d6ef20396114eb3a3f20ad3c39c2099 [2022-04-06 13:25:48,577 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 13:25:48,579 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 13:25:48,580 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 13:25:48,580 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 13:25:48,585 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 13:25:48,586 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 01:25:48" (1/1) ... [2022-04-06 13:25:48,587 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fcb3125 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:25:48, skipping insertion in model container [2022-04-06 13:25:48,587 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 01:25:48" (1/1) ... [2022-04-06 13:25:48,595 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 13:25:48,608 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 13:25:48,820 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/ps6-ll_unwindbound20.c[458,471] [2022-04-06 13:25:48,860 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 13:25:48,869 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 13:25:48,883 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/ps6-ll_unwindbound20.c[458,471] [2022-04-06 13:25:48,905 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 13:25:48,923 INFO L208 MainTranslator]: Completed translation [2022-04-06 13:25:48,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:25:48 WrapperNode [2022-04-06 13:25:48,925 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 13:25:48,926 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 13:25:48,927 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 13:25:48,927 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 13:25:48,938 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:25:48" (1/1) ... [2022-04-06 13:25:48,938 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:25:48" (1/1) ... [2022-04-06 13:25:48,944 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:25:48" (1/1) ... [2022-04-06 13:25:48,945 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:25:48" (1/1) ... [2022-04-06 13:25:48,957 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:25:48" (1/1) ... [2022-04-06 13:25:48,960 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:25:48" (1/1) ... [2022-04-06 13:25:48,962 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:25:48" (1/1) ... [2022-04-06 13:25:48,967 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 13:25:48,968 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 13:25:48,969 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 13:25:48,969 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 13:25:48,970 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:25:48" (1/1) ... [2022-04-06 13:25:48,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 13:25:48,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 13:25:49,005 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 13:25:49,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 13:25:49,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 13:25:49,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 13:25:49,044 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 13:25:49,044 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 13:25:49,044 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 13:25:49,044 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 13:25:49,045 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 13:25:49,045 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 13:25:49,046 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 13:25:49,046 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 13:25:49,046 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2022-04-06 13:25:49,046 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 13:25:49,046 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 13:25:49,047 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 13:25:49,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 13:25:49,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 13:25:49,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 13:25:49,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 13:25:49,047 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 13:25:49,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 13:25:49,108 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 13:25:49,110 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 13:25:49,232 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 13:25:49,237 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 13:25:49,238 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 13:25:49,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 01:25:49 BoogieIcfgContainer [2022-04-06 13:25:49,239 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 13:25:49,240 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 13:25:49,240 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 13:25:49,242 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 13:25:49,245 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 01:25:49" (1/1) ... [2022-04-06 13:25:49,247 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-06 13:25:49,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 01:25:49 BasicIcfg [2022-04-06 13:25:49,262 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 13:25:49,263 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 13:25:49,264 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 13:25:49,266 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 13:25:49,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 01:25:48" (1/4) ... [2022-04-06 13:25:49,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b1e2805 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 01:25:49, skipping insertion in model container [2022-04-06 13:25:49,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:25:48" (2/4) ... [2022-04-06 13:25:49,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b1e2805 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 01:25:49, skipping insertion in model container [2022-04-06 13:25:49,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 01:25:49" (3/4) ... [2022-04-06 13:25:49,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b1e2805 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 01:25:49, skipping insertion in model container [2022-04-06 13:25:49,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 01:25:49" (4/4) ... [2022-04-06 13:25:49,269 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_unwindbound20.cqvasr [2022-04-06 13:25:49,274 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-06 13:25:49,274 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 13:25:49,351 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 13:25:49,374 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 13:25:49,374 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 13:25:49,416 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 13:25:49,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 13:25:49,420 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:25:49,421 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:25:49,421 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:25:49,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:25:49,426 INFO L85 PathProgramCache]: Analyzing trace with hash 843387237, now seen corresponding path program 1 times [2022-04-06 13:25:49,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:25:49,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702105292] [2022-04-06 13:25:49,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:25:49,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:25:49,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:25:49,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:25:49,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:25:49,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 13:25:49,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:25:49,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:25:49,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:25:49,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702105292] [2022-04-06 13:25:49,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702105292] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:25:49,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:25:49,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 13:25:49,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533950160] [2022-04-06 13:25:49,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:25:49,697 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 13:25:49,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:25:49,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 13:25:49,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 13:25:49,727 INFO L87 Difference]: Start difference. First operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 13:25:49,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:25:49,838 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2022-04-06 13:25:49,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 13:25:49,841 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-04-06 13:25:49,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:25:49,849 INFO L225 Difference]: With dead ends: 50 [2022-04-06 13:25:49,849 INFO L226 Difference]: Without dead ends: 25 [2022-04-06 13:25:49,853 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 13:25:49,862 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:25:49,863 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 34 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:25:49,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-04-06 13:25:49,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-04-06 13:25:49,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 13:25:49,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-04-06 13:25:49,913 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2022-04-06 13:25:49,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:25:49,913 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-04-06 13:25:49,914 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 13:25:49,914 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-04-06 13:25:49,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-06 13:25:49,915 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:25:49,915 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:25:49,916 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 13:25:49,917 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:25:49,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:25:49,917 INFO L85 PathProgramCache]: Analyzing trace with hash 208087835, now seen corresponding path program 1 times [2022-04-06 13:25:49,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:25:49,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147773495] [2022-04-06 13:25:49,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:25:49,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:25:49,953 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 13:25:49,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1725722960] [2022-04-06 13:25:49,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:25:49,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:25:49,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 13:25:49,960 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 13:25:49,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 13:25:50,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:25:50,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 13:25:50,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 13:25:50,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:25:50,147 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 13:25:50,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:25:50,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147773495] [2022-04-06 13:25:50,148 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 13:25:50,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725722960] [2022-04-06 13:25:50,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725722960] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:25:50,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:25:50,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:25:50,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197704587] [2022-04-06 13:25:50,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:25:50,150 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:25:50,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:25:50,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:25:50,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:25:50,151 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 13:25:50,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:25:50,167 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-04-06 13:25:50,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:25:50,168 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-04-06 13:25:50,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:25:50,169 INFO L225 Difference]: With dead ends: 34 [2022-04-06 13:25:50,169 INFO L226 Difference]: Without dead ends: 26 [2022-04-06 13:25:50,169 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:25:50,170 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 13:25:50,171 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 63 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 13:25:50,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-04-06 13:25:50,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-04-06 13:25:50,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 13:25:50,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-04-06 13:25:50,178 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 18 [2022-04-06 13:25:50,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:25:50,178 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-04-06 13:25:50,178 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 13:25:50,178 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-04-06 13:25:50,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-06 13:25:50,179 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:25:50,179 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:25:50,203 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-06 13:25:50,391 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:25:50,392 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:25:50,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:25:50,393 INFO L85 PathProgramCache]: Analyzing trace with hash 209190102, now seen corresponding path program 1 times [2022-04-06 13:25:50,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:25:50,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813641006] [2022-04-06 13:25:50,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:25:50,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:25:50,405 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 13:25:50,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1218207796] [2022-04-06 13:25:50,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:25:50,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:25:50,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 13:25:50,412 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 13:25:50,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 13:25:50,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:25:50,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 13:25:50,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 13:25:50,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:25:50,593 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 13:25:50,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:25:50,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813641006] [2022-04-06 13:25:50,594 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 13:25:50,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218207796] [2022-04-06 13:25:50,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218207796] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:25:50,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:25:50,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 13:25:50,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085108081] [2022-04-06 13:25:50,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:25:50,595 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 13:25:50,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:25:50,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 13:25:50,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 13:25:50,597 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 13:25:50,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:25:50,681 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2022-04-06 13:25:50,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 13:25:50,683 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-04-06 13:25:50,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:25:50,683 INFO L225 Difference]: With dead ends: 36 [2022-04-06 13:25:50,684 INFO L226 Difference]: Without dead ends: 32 [2022-04-06 13:25:50,684 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 13:25:50,685 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:25:50,685 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 87 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:25:50,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-04-06 13:25:50,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-04-06 13:25:50,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 13:25:50,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-04-06 13:25:50,693 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 18 [2022-04-06 13:25:50,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:25:50,693 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-04-06 13:25:50,693 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 13:25:50,693 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-04-06 13:25:50,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-06 13:25:50,694 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:25:50,694 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:25:50,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 13:25:50,909 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-06 13:25:50,910 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:25:50,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:25:50,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1223799235, now seen corresponding path program 1 times [2022-04-06 13:25:50,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:25:50,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173240558] [2022-04-06 13:25:50,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:25:50,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:25:50,923 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 13:25:50,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1716184660] [2022-04-06 13:25:50,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:25:50,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:25:50,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 13:25:50,925 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 13:25:50,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 13:25:50,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:25:50,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 13:25:50,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 13:25:51,109 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:25:51,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 13:25:51,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:25:51,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:25:51,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173240558] [2022-04-06 13:25:51,232 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 13:25:51,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716184660] [2022-04-06 13:25:51,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716184660] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 13:25:51,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 13:25:51,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-04-06 13:25:51,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108761073] [2022-04-06 13:25:51,233 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 13:25:51,234 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 13:25:51,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:25:51,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 13:25:51,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-04-06 13:25:51,236 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-04-06 13:25:51,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:25:51,347 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2022-04-06 13:25:51,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 13:25:51,348 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 26 [2022-04-06 13:25:51,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:25:51,349 INFO L225 Difference]: With dead ends: 66 [2022-04-06 13:25:51,349 INFO L226 Difference]: Without dead ends: 58 [2022-04-06 13:25:51,350 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-04-06 13:25:51,351 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 32 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:25:51,351 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 106 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:25:51,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-04-06 13:25:51,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2022-04-06 13:25:51,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 37 states have internal predecessors, (41), 13 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 13:25:51,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2022-04-06 13:25:51,361 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 26 [2022-04-06 13:25:51,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:25:51,362 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2022-04-06 13:25:51,362 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-04-06 13:25:51,362 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2022-04-06 13:25:51,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-06 13:25:51,363 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:25:51,363 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:25:51,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 13:25:51,579 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:25:51,580 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:25:51,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:25:51,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1222696968, now seen corresponding path program 1 times [2022-04-06 13:25:51,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:25:51,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567630356] [2022-04-06 13:25:51,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:25:51,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:25:51,602 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 13:25:51,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1261976243] [2022-04-06 13:25:51,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:25:51,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:25:51,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 13:25:51,603 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 13:25:51,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 13:25:51,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:25:51,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 13:25:51,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 13:25:51,804 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:25:51,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 13:25:52,195 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 13:25:52,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:25:52,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567630356] [2022-04-06 13:25:52,195 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 13:25:52,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261976243] [2022-04-06 13:25:52,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261976243] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 13:25:52,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 13:25:52,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-04-06 13:25:52,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743658005] [2022-04-06 13:25:52,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:25:52,197 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 13:25:52,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:25:52,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 13:25:52,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-04-06 13:25:52,198 INFO L87 Difference]: Start difference. First operand 54 states and 63 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 13:25:52,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:25:52,242 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2022-04-06 13:25:52,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 13:25:52,243 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2022-04-06 13:25:52,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:25:52,244 INFO L225 Difference]: With dead ends: 68 [2022-04-06 13:25:52,244 INFO L226 Difference]: Without dead ends: 60 [2022-04-06 13:25:52,244 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-06 13:25:52,245 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 7 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 13:25:52,245 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 73 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 13:25:52,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-04-06 13:25:52,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2022-04-06 13:25:52,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 38 states have internal predecessors, (40), 11 states have call successors, (11), 8 states have call predecessors, (11), 6 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 13:25:52,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2022-04-06 13:25:52,256 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 26 [2022-04-06 13:25:52,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:25:52,257 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2022-04-06 13:25:52,257 INFO L479 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 13:25:52,257 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2022-04-06 13:25:52,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 13:25:52,258 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:25:52,258 INFO L499 BasicCegarLoop]: trace histogram [4, 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] [2022-04-06 13:25:52,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 13:25:52,468 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:25:52,468 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:25:52,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:25:52,468 INFO L85 PathProgramCache]: Analyzing trace with hash 96926796, now seen corresponding path program 1 times [2022-04-06 13:25:52,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:25:52,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031571944] [2022-04-06 13:25:52,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:25:52,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:25:52,486 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 13:25:52,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [495879740] [2022-04-06 13:25:52,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:25:52,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:25:52,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 13:25:52,487 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 13:25:52,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 13:25:52,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:25:52,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 13:25:52,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 13:25:52,719 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 13:25:52,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 13:25:52,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:25:52,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031571944] [2022-04-06 13:25:52,917 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 13:25:52,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495879740] [2022-04-06 13:25:52,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495879740] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 13:25:52,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 13:25:52,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-04-06 13:25:52,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88116977] [2022-04-06 13:25:52,918 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 13:25:52,918 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 13:25:52,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:25:52,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 13:25:52,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-06 13:25:52,919 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-06 13:25:53,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:25:53,015 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2022-04-06 13:25:53,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 13:25:53,016 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 37 [2022-04-06 13:25:53,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:25:53,018 INFO L225 Difference]: With dead ends: 59 [2022-04-06 13:25:53,018 INFO L226 Difference]: Without dead ends: 53 [2022-04-06 13:25:53,018 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-04-06 13:25:53,019 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:25:53,020 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 141 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:25:53,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-04-06 13:25:53,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-04-06 13:25:53,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 37 states have internal predecessors, (39), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 13:25:53,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2022-04-06 13:25:53,037 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 37 [2022-04-06 13:25:53,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:25:53,038 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2022-04-06 13:25:53,038 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-06 13:25:53,038 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2022-04-06 13:25:53,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 13:25:53,039 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:25:53,039 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:25:53,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 13:25:53,254 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:25:53,255 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:25:53,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:25:53,256 INFO L85 PathProgramCache]: Analyzing trace with hash -678596118, now seen corresponding path program 2 times [2022-04-06 13:25:53,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:25:53,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494734923] [2022-04-06 13:25:53,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:25:53,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:25:53,267 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 13:25:53,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [675913767] [2022-04-06 13:25:53,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 13:25:53,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:25:53,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 13:25:53,268 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 13:25:53,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 13:25:53,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 13:25:53,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 13:25:53,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 13:25:53,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 13:25:53,593 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 13:25:53,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 13:25:53,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:25:53,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494734923] [2022-04-06 13:25:53,807 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 13:25:53,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675913767] [2022-04-06 13:25:53,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675913767] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 13:25:53,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 13:25:53,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-04-06 13:25:53,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312324577] [2022-04-06 13:25:53,808 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 13:25:53,808 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 13:25:53,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:25:53,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 13:25:53,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-04-06 13:25:53,809 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-04-06 13:25:53,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:25:53,922 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2022-04-06 13:25:53,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 13:25:53,923 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 45 [2022-04-06 13:25:53,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:25:53,924 INFO L225 Difference]: With dead ends: 58 [2022-04-06 13:25:53,924 INFO L226 Difference]: Without dead ends: 52 [2022-04-06 13:25:53,924 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-04-06 13:25:53,925 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 2 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:25:53,925 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 179 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:25:53,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-04-06 13:25:53,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-04-06 13:25:53,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 13:25:53,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2022-04-06 13:25:53,933 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 45 [2022-04-06 13:25:53,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:25:53,934 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2022-04-06 13:25:53,934 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-04-06 13:25:53,934 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2022-04-06 13:25:53,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 13:25:53,935 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:25:53,935 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:25:53,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 13:25:54,142 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:25:54,143 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:25:54,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:25:54,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1280010632, now seen corresponding path program 3 times [2022-04-06 13:25:54,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:25:54,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167588640] [2022-04-06 13:25:54,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:25:54,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:25:54,161 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 13:25:54,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [474791431] [2022-04-06 13:25:54,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 13:25:54,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:25:54,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 13:25:54,164 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 13:25:54,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 13:25:54,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-04-06 13:25:54,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 13:25:54,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 13:25:54,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 13:25:54,863 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 13:25:54,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 13:25:55,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:25:55,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167588640] [2022-04-06 13:25:55,007 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 13:25:55,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474791431] [2022-04-06 13:25:55,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474791431] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 13:25:55,007 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 13:25:55,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-04-06 13:25:55,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124050644] [2022-04-06 13:25:55,007 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 13:25:55,008 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 13:25:55,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:25:55,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 13:25:55,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-04-06 13:25:55,009 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-04-06 13:25:55,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:25:55,149 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2022-04-06 13:25:55,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 13:25:55,150 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 53 [2022-04-06 13:25:55,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:25:55,151 INFO L225 Difference]: With dead ends: 60 [2022-04-06 13:25:55,151 INFO L226 Difference]: Without dead ends: 54 [2022-04-06 13:25:55,151 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-04-06 13:25:55,152 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 2 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:25:55,152 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 221 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:25:55,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-04-06 13:25:55,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-04-06 13:25:55,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 states have internal predecessors, (39), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 13:25:55,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2022-04-06 13:25:55,164 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 53 [2022-04-06 13:25:55,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:25:55,164 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2022-04-06 13:25:55,164 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-04-06 13:25:55,164 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2022-04-06 13:25:55,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 13:25:55,166 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:25:55,166 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:25:55,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 13:25:55,374 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:25:55,375 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:25:55,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:25:55,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1735624483, now seen corresponding path program 1 times [2022-04-06 13:25:55,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:25:55,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236498068] [2022-04-06 13:25:55,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:25:55,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:25:55,393 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 13:25:55,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1250866156] [2022-04-06 13:25:55,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:25:55,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:25:55,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 13:25:55,397 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 13:25:55,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 13:25:55,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:25:55,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 13:25:55,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 13:25:55,598 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 13:25:55,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 13:25:55,765 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 13:25:55,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:25:55,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236498068] [2022-04-06 13:25:55,766 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 13:25:55,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250866156] [2022-04-06 13:25:55,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250866156] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 13:25:55,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 13:25:55,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-04-06 13:25:55,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741285808] [2022-04-06 13:25:55,766 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 13:25:55,767 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 13:25:55,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:25:55,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 13:25:55,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-04-06 13:25:55,768 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 12 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (14), 11 states have call predecessors, (14), 12 states have call successors, (14) [2022-04-06 13:25:56,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:25:56,001 INFO L93 Difference]: Finished difference Result 140 states and 152 transitions. [2022-04-06 13:25:56,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 13:25:56,002 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 12 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (14), 11 states have call predecessors, (14), 12 states have call successors, (14) Word has length 55 [2022-04-06 13:25:56,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:25:56,003 INFO L225 Difference]: With dead ends: 140 [2022-04-06 13:25:56,003 INFO L226 Difference]: Without dead ends: 130 [2022-04-06 13:25:56,004 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-04-06 13:25:56,004 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 110 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:25:56,004 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 157 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:25:56,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-04-06 13:25:56,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 105. [2022-04-06 13:25:56,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 72 states have (on average 1.0972222222222223) internal successors, (79), 77 states have internal predecessors, (79), 20 states have call successors, (20), 14 states have call predecessors, (20), 12 states have return successors, (18), 13 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 13:25:56,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 117 transitions. [2022-04-06 13:25:56,024 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 117 transitions. Word has length 55 [2022-04-06 13:25:56,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:25:56,024 INFO L478 AbstractCegarLoop]: Abstraction has 105 states and 117 transitions. [2022-04-06 13:25:56,024 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 12 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (14), 11 states have call predecessors, (14), 12 states have call successors, (14) [2022-04-06 13:25:56,024 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 117 transitions. [2022-04-06 13:25:56,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 13:25:56,025 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:25:56,026 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:25:56,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 13:25:56,249 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-04-06 13:25:56,250 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:25:56,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:25:56,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1029628710, now seen corresponding path program 4 times [2022-04-06 13:25:56,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:25:56,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026910748] [2022-04-06 13:25:56,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:25:56,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:25:56,259 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 13:25:56,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [351174875] [2022-04-06 13:25:56,259 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 13:25:56,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:25:56,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 13:25:56,261 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 13:25:56,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 13:25:56,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 13:25:56,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 13:25:56,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 13:25:56,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 13:25:56,537 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 13:25:56,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 13:25:56,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:25:56,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026910748] [2022-04-06 13:25:56,721 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 13:25:56,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351174875] [2022-04-06 13:25:56,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351174875] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 13:25:56,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 13:25:56,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-04-06 13:25:56,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432370973] [2022-04-06 13:25:56,722 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 13:25:56,722 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 13:25:56,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:25:56,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 13:25:56,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-04-06 13:25:56,723 INFO L87 Difference]: Start difference. First operand 105 states and 117 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 7 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-04-06 13:25:56,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:25:56,877 INFO L93 Difference]: Finished difference Result 110 states and 121 transitions. [2022-04-06 13:25:56,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 13:25:56,877 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 7 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 61 [2022-04-06 13:25:56,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:25:56,879 INFO L225 Difference]: With dead ends: 110 [2022-04-06 13:25:56,879 INFO L226 Difference]: Without dead ends: 104 [2022-04-06 13:25:56,879 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-04-06 13:25:56,880 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 2 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:25:56,880 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 267 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:25:56,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-04-06 13:25:56,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-04-06 13:25:56,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 72 states have (on average 1.0833333333333333) internal successors, (78), 76 states have internal predecessors, (78), 19 states have call successors, (19), 14 states have call predecessors, (19), 12 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 13:25:56,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 114 transitions. [2022-04-06 13:25:56,893 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 114 transitions. Word has length 61 [2022-04-06 13:25:56,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:25:56,893 INFO L478 AbstractCegarLoop]: Abstraction has 104 states and 114 transitions. [2022-04-06 13:25:56,894 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 7 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-04-06 13:25:56,894 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 114 transitions. [2022-04-06 13:25:56,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 13:25:56,895 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:25:56,895 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:25:56,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 13:25:57,110 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-06 13:25:57,111 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:25:57,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:25:57,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1176886980, now seen corresponding path program 5 times [2022-04-06 13:25:57,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:25:57,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236129582] [2022-04-06 13:25:57,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:25:57,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:25:57,135 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 13:25:57,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1150472508] [2022-04-06 13:25:57,135 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 13:25:57,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:25:57,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 13:25:57,137 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 13:25:57,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 13:25:57,564 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-04-06 13:25:57,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 13:25:57,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 13:25:57,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 13:25:57,852 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 14 proven. 60 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 13:25:57,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 13:25:58,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:25:58,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236129582] [2022-04-06 13:25:58,079 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 13:25:58,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150472508] [2022-04-06 13:25:58,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150472508] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 13:25:58,080 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 13:25:58,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-04-06 13:25:58,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339632499] [2022-04-06 13:25:58,080 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 13:25:58,081 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 13:25:58,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:25:58,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 13:25:58,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-04-06 13:25:58,082 INFO L87 Difference]: Start difference. First operand 104 states and 114 transitions. Second operand has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 8 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-04-06 13:25:58,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:25:58,262 INFO L93 Difference]: Finished difference Result 109 states and 118 transitions. [2022-04-06 13:25:58,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 13:25:58,262 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 8 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 69 [2022-04-06 13:25:58,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:25:58,263 INFO L225 Difference]: With dead ends: 109 [2022-04-06 13:25:58,263 INFO L226 Difference]: Without dead ends: 103 [2022-04-06 13:25:58,264 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-04-06 13:25:58,264 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 2 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:25:58,264 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 317 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:25:58,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-04-06 13:25:58,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-04-06 13:25:58,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 72 states have (on average 1.0694444444444444) internal successors, (77), 75 states have internal predecessors, (77), 18 states have call successors, (18), 14 states have call predecessors, (18), 12 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 13:25:58,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 111 transitions. [2022-04-06 13:25:58,274 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 111 transitions. Word has length 69 [2022-04-06 13:25:58,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:25:58,274 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 111 transitions. [2022-04-06 13:25:58,274 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 8 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-04-06 13:25:58,274 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 111 transitions. [2022-04-06 13:25:58,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-04-06 13:25:58,276 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:25:58,276 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:25:58,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 13:25:58,481 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-04-06 13:25:58,482 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:25:58,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:25:58,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1006740382, now seen corresponding path program 6 times [2022-04-06 13:25:58,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:25:58,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298042199] [2022-04-06 13:25:58,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:25:58,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:25:58,491 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 13:25:58,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [507399672] [2022-04-06 13:25:58,491 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 13:25:58,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:25:58,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 13:25:58,496 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 13:25:58,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 13:26:04,119 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 13:26:04,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 13:26:04,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-06 13:26:04,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 13:26:04,513 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 16 proven. 84 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 13:26:04,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 13:26:04,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:26:04,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298042199] [2022-04-06 13:26:04,990 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 13:26:04,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507399672] [2022-04-06 13:26:04,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507399672] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 13:26:04,990 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 13:26:04,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-04-06 13:26:04,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825931483] [2022-04-06 13:26:04,990 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 13:26:04,991 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 13:26:04,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:26:04,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 13:26:04,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-04-06 13:26:04,992 INFO L87 Difference]: Start difference. First operand 103 states and 111 transitions. Second operand has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 9 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-04-06 13:26:05,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:26:05,238 INFO L93 Difference]: Finished difference Result 108 states and 115 transitions. [2022-04-06 13:26:05,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 13:26:05,239 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 9 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 77 [2022-04-06 13:26:05,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:26:05,240 INFO L225 Difference]: With dead ends: 108 [2022-04-06 13:26:05,240 INFO L226 Difference]: Without dead ends: 102 [2022-04-06 13:26:05,241 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-04-06 13:26:05,241 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 2 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 13:26:05,241 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 367 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 13:26:05,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-04-06 13:26:05,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-04-06 13:26:05,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 74 states have internal predecessors, (76), 17 states have call successors, (17), 14 states have call predecessors, (17), 12 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-06 13:26:05,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 108 transitions. [2022-04-06 13:26:05,253 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 108 transitions. Word has length 77 [2022-04-06 13:26:05,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:26:05,253 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 108 transitions. [2022-04-06 13:26:05,253 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 9 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-04-06 13:26:05,253 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 108 transitions. [2022-04-06 13:26:05,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-04-06 13:26:05,254 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:26:05,255 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:26:05,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 13:26:05,474 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-04-06 13:26:05,474 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:26:05,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:26:05,475 INFO L85 PathProgramCache]: Analyzing trace with hash -700032000, now seen corresponding path program 7 times [2022-04-06 13:26:05,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:26:05,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89742104] [2022-04-06 13:26:05,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:26:05,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:26:05,486 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 13:26:05,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [430197518] [2022-04-06 13:26:05,490 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-06 13:26:05,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:26:05,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 13:26:05,491 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 13:26:05,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 13:26:06,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:26:06,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 13:26:06,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 13:26:06,594 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 18 proven. 112 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 13:26:06,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 13:26:07,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:26:07,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89742104] [2022-04-06 13:26:07,283 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 13:26:07,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430197518] [2022-04-06 13:26:07,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430197518] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 13:26:07,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 13:26:07,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-04-06 13:26:07,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321741296] [2022-04-06 13:26:07,283 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 13:26:07,284 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 13:26:07,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:26:07,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 13:26:07,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-04-06 13:26:07,284 INFO L87 Difference]: Start difference. First operand 102 states and 108 transitions. Second operand has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 10 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-04-06 13:26:07,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:26:07,545 INFO L93 Difference]: Finished difference Result 107 states and 112 transitions. [2022-04-06 13:26:07,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 13:26:07,545 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 10 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 85 [2022-04-06 13:26:07,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:26:07,546 INFO L225 Difference]: With dead ends: 107 [2022-04-06 13:26:07,546 INFO L226 Difference]: Without dead ends: 101 [2022-04-06 13:26:07,547 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-04-06 13:26:07,547 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 2 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 13:26:07,547 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 423 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 13:26:07,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-04-06 13:26:07,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-04-06 13:26:07,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 73 states have internal predecessors, (75), 16 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 13:26:07,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2022-04-06 13:26:07,556 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 85 [2022-04-06 13:26:07,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:26:07,557 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2022-04-06 13:26:07,557 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 10 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-04-06 13:26:07,557 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2022-04-06 13:26:07,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-04-06 13:26:07,558 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:26:07,558 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:26:07,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 13:26:07,759 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-06 13:26:07,759 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:26:07,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:26:07,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1583078814, now seen corresponding path program 8 times [2022-04-06 13:26:07,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:26:07,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105826544] [2022-04-06 13:26:07,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:26:07,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:26:07,795 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 13:26:07,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [795316642] [2022-04-06 13:26:07,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 13:26:07,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:26:07,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 13:26:07,797 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 13:26:07,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 13:26:08,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 13:26:08,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 13:26:08,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 40 conjunts are in the unsatisfiable core [2022-04-06 13:26:08,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 13:26:09,141 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 20 proven. 144 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 13:26:09,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 13:26:09,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:26:09,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105826544] [2022-04-06 13:26:09,338 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 13:26:09,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795316642] [2022-04-06 13:26:09,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795316642] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 13:26:09,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 13:26:09,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-04-06 13:26:09,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615462499] [2022-04-06 13:26:09,339 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 13:26:09,339 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 13:26:09,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:26:09,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 13:26:09,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-04-06 13:26:09,341 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand has 14 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 11 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-04-06 13:26:09,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:26:09,632 INFO L93 Difference]: Finished difference Result 106 states and 109 transitions. [2022-04-06 13:26:09,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 13:26:09,632 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 11 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 93 [2022-04-06 13:26:09,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:26:09,633 INFO L225 Difference]: With dead ends: 106 [2022-04-06 13:26:09,633 INFO L226 Difference]: Without dead ends: 100 [2022-04-06 13:26:09,633 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-04-06 13:26:09,636 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 2 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 13:26:09,636 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 491 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 13:26:09,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-04-06 13:26:09,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-04-06 13:26:09,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 72 states have internal predecessors, (74), 15 states have call successors, (15), 14 states have call predecessors, (15), 12 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 13:26:09,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2022-04-06 13:26:09,645 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 93 [2022-04-06 13:26:09,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:26:09,645 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2022-04-06 13:26:09,646 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 11 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-04-06 13:26:09,646 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2022-04-06 13:26:09,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-04-06 13:26:09,647 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:26:09,647 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:26:09,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 13:26:09,853 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-06 13:26:09,853 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:26:09,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:26:09,853 INFO L85 PathProgramCache]: Analyzing trace with hash -6495940, now seen corresponding path program 9 times [2022-04-06 13:26:09,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:26:09,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638807481] [2022-04-06 13:26:09,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:26:09,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:26:09,864 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 13:26:09,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1457559520] [2022-04-06 13:26:09,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 13:26:09,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:26:09,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 13:26:09,865 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 13:26:09,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 13:26:10,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-04-06 13:26:10,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 13:26:10,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 44 conjunts are in the unsatisfiable core [2022-04-06 13:26:10,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 13:26:11,300 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 22 proven. 180 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 13:26:11,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 13:26:11,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:26:11,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638807481] [2022-04-06 13:26:11,450 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 13:26:11,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457559520] [2022-04-06 13:26:11,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457559520] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 13:26:11,451 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 13:26:11,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-04-06 13:26:11,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589442724] [2022-04-06 13:26:11,451 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 13:26:11,451 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 13:26:11,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:26:11,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 13:26:11,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-04-06 13:26:11,452 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 12 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2022-04-06 13:26:11,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:26:11,758 INFO L93 Difference]: Finished difference Result 108 states and 112 transitions. [2022-04-06 13:26:11,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 13:26:11,758 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 12 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) Word has length 101 [2022-04-06 13:26:11,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:26:11,759 INFO L225 Difference]: With dead ends: 108 [2022-04-06 13:26:11,759 INFO L226 Difference]: Without dead ends: 102 [2022-04-06 13:26:11,759 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-04-06 13:26:11,760 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 2 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 13:26:11,760 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 557 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 13:26:11,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-04-06 13:26:11,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-04-06 13:26:11,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 73 states have internal predecessors, (75), 16 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 13:26:11,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 105 transitions. [2022-04-06 13:26:11,769 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 105 transitions. Word has length 101 [2022-04-06 13:26:11,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:26:11,769 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 105 transitions. [2022-04-06 13:26:11,770 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 12 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2022-04-06 13:26:11,770 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 105 transitions. [2022-04-06 13:26:11,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-04-06 13:26:11,771 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:26:11,771 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:26:11,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 13:26:11,978 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:26:11,978 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:26:11,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:26:11,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1941577257, now seen corresponding path program 2 times [2022-04-06 13:26:11,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:26:11,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368732559] [2022-04-06 13:26:11,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:26:11,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:26:11,994 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 13:26:11,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1112317381] [2022-04-06 13:26:11,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 13:26:11,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:26:11,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 13:26:11,996 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 13:26:11,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 13:26:12,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 13:26:12,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 13:26:12,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 13:26:12,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 13:26:12,293 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 60 proven. 380 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 13:26:12,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 13:26:12,579 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 22 proven. 200 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 13:26:12,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:26:12,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368732559] [2022-04-06 13:26:12,580 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 13:26:12,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112317381] [2022-04-06 13:26:12,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112317381] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 13:26:12,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 13:26:12,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2022-04-06 13:26:12,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663278662] [2022-04-06 13:26:12,580 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 13:26:12,580 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 13:26:12,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:26:12,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 13:26:12,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-04-06 13:26:12,581 INFO L87 Difference]: Start difference. First operand 102 states and 105 transitions. Second operand has 24 states, 24 states have (on average 4.708333333333333) internal successors, (113), 24 states have internal predecessors, (113), 22 states have call successors, (28), 13 states have call predecessors, (28), 13 states have return successors, (26), 21 states have call predecessors, (26), 22 states have call successors, (26) [2022-04-06 13:26:12,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:26:12,999 INFO L93 Difference]: Finished difference Result 244 states and 264 transitions. [2022-04-06 13:26:13,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 13:26:13,007 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.708333333333333) internal successors, (113), 24 states have internal predecessors, (113), 22 states have call successors, (28), 13 states have call predecessors, (28), 13 states have return successors, (26), 21 states have call predecessors, (26), 22 states have call successors, (26) Word has length 103 [2022-04-06 13:26:13,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:26:13,008 INFO L225 Difference]: With dead ends: 244 [2022-04-06 13:26:13,009 INFO L226 Difference]: Without dead ends: 234 [2022-04-06 13:26:13,010 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 182 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=665, Invalid=1141, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 13:26:13,010 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 204 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 13:26:13,010 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 293 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 13:26:13,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-04-06 13:26:13,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 189. [2022-04-06 13:26:13,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 132 states have (on average 1.0833333333333333) internal successors, (143), 141 states have internal predecessors, (143), 34 states have call successors, (34), 24 states have call predecessors, (34), 22 states have return successors, (32), 23 states have call predecessors, (32), 32 states have call successors, (32) [2022-04-06 13:26:13,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 209 transitions. [2022-04-06 13:26:13,026 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 209 transitions. Word has length 103 [2022-04-06 13:26:13,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:26:13,026 INFO L478 AbstractCegarLoop]: Abstraction has 189 states and 209 transitions. [2022-04-06 13:26:13,027 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.708333333333333) internal successors, (113), 24 states have internal predecessors, (113), 22 states have call successors, (28), 13 states have call predecessors, (28), 13 states have return successors, (26), 21 states have call predecessors, (26), 22 states have call successors, (26) [2022-04-06 13:26:13,027 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 209 transitions. [2022-04-06 13:26:13,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-04-06 13:26:13,028 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:26:13,028 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:26:13,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 13:26:13,235 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-04-06 13:26:13,235 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:26:13,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:26:13,236 INFO L85 PathProgramCache]: Analyzing trace with hash 526870234, now seen corresponding path program 10 times [2022-04-06 13:26:13,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:26:13,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954286083] [2022-04-06 13:26:13,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:26:13,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:26:13,249 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 13:26:13,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [568271805] [2022-04-06 13:26:13,250 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 13:26:13,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:26:13,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 13:26:13,251 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 13:26:13,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 13:26:13,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 13:26:13,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 13:26:13,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 48 conjunts are in the unsatisfiable core [2022-04-06 13:26:13,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 13:26:13,708 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 24 proven. 220 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 13:26:13,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 13:26:13,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:26:13,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954286083] [2022-04-06 13:26:13,849 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 13:26:13,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568271805] [2022-04-06 13:26:13,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568271805] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 13:26:13,849 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 13:26:13,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-04-06 13:26:13,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255709662] [2022-04-06 13:26:13,849 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 13:26:13,850 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 13:26:13,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:26:13,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 13:26:13,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-04-06 13:26:13,850 INFO L87 Difference]: Start difference. First operand 189 states and 209 transitions. Second operand has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 13 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-04-06 13:26:14,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:26:14,190 INFO L93 Difference]: Finished difference Result 194 states and 213 transitions. [2022-04-06 13:26:14,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 13:26:14,191 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 13 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) Word has length 109 [2022-04-06 13:26:14,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:26:14,193 INFO L225 Difference]: With dead ends: 194 [2022-04-06 13:26:14,193 INFO L226 Difference]: Without dead ends: 188 [2022-04-06 13:26:14,193 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-04-06 13:26:14,194 INFO L913 BasicCegarLoop]: 67 mSDtfsCounter, 2 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 627 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 13:26:14,194 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 627 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 13:26:14,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-04-06 13:26:14,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2022-04-06 13:26:14,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 132 states have (on average 1.0757575757575757) internal successors, (142), 140 states have internal predecessors, (142), 33 states have call successors, (33), 24 states have call predecessors, (33), 22 states have return successors, (31), 23 states have call predecessors, (31), 31 states have call successors, (31) [2022-04-06 13:26:14,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 206 transitions. [2022-04-06 13:26:14,210 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 206 transitions. Word has length 109 [2022-04-06 13:26:14,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:26:14,210 INFO L478 AbstractCegarLoop]: Abstraction has 188 states and 206 transitions. [2022-04-06 13:26:14,211 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 13 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-04-06 13:26:14,211 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 206 transitions. [2022-04-06 13:26:14,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-04-06 13:26:14,211 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:26:14,212 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:26:14,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-06 13:26:14,427 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-06 13:26:14,427 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:26:14,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:26:14,428 INFO L85 PathProgramCache]: Analyzing trace with hash -451318152, now seen corresponding path program 11 times [2022-04-06 13:26:14,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:26:14,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148674441] [2022-04-06 13:26:14,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:26:14,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:26:14,436 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 13:26:14,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1504290162] [2022-04-06 13:26:14,436 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 13:26:14,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:26:14,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 13:26:14,441 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 13:26:14,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 13:31:26,724 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-04-06 13:31:26,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 13:31:26,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 52 conjunts are in the unsatisfiable core [2022-04-06 13:31:26,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 13:31:27,261 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 26 proven. 264 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 13:31:27,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 13:31:27,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:31:27,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148674441] [2022-04-06 13:31:27,463 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 13:31:27,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504290162] [2022-04-06 13:31:27,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504290162] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 13:31:27,463 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 13:31:27,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-04-06 13:31:27,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416804907] [2022-04-06 13:31:27,463 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 13:31:27,463 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 13:31:27,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:31:27,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 13:31:27,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-04-06 13:31:27,464 INFO L87 Difference]: Start difference. First operand 188 states and 206 transitions. Second operand has 17 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 14 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-04-06 13:31:27,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:31:27,874 INFO L93 Difference]: Finished difference Result 193 states and 210 transitions. [2022-04-06 13:31:27,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 13:31:27,875 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 14 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) Word has length 117 [2022-04-06 13:31:27,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:31:27,876 INFO L225 Difference]: With dead ends: 193 [2022-04-06 13:31:27,876 INFO L226 Difference]: Without dead ends: 187 [2022-04-06 13:31:27,877 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-04-06 13:31:27,877 INFO L913 BasicCegarLoop]: 71 mSDtfsCounter, 2 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 13:31:27,877 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 701 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 13:31:27,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-04-06 13:31:27,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2022-04-06 13:31:27,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 132 states have (on average 1.0681818181818181) internal successors, (141), 139 states have internal predecessors, (141), 32 states have call successors, (32), 24 states have call predecessors, (32), 22 states have return successors, (30), 23 states have call predecessors, (30), 30 states have call successors, (30) [2022-04-06 13:31:27,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 203 transitions. [2022-04-06 13:31:27,894 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 203 transitions. Word has length 117 [2022-04-06 13:31:27,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:31:27,895 INFO L478 AbstractCegarLoop]: Abstraction has 187 states and 203 transitions. [2022-04-06 13:31:27,895 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 14 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-04-06 13:31:27,895 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 203 transitions. [2022-04-06 13:31:27,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-04-06 13:31:27,896 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:31:27,896 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:31:27,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 13:31:28,103 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-06 13:31:28,104 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:31:28,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:31:28,105 INFO L85 PathProgramCache]: Analyzing trace with hash 974190614, now seen corresponding path program 12 times [2022-04-06 13:31:28,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:31:28,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781268691] [2022-04-06 13:31:28,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:31:28,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:31:28,115 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 13:31:28,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1680943614] [2022-04-06 13:31:28,115 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 13:31:28,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:31:28,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 13:31:28,117 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) [2022-04-06 13:31:28,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process