/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/hard-u_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 08:10:04,425 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 08:10:04,427 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 08:10:04,489 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-05 08:10:04,490 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-05 08:10:04,491 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-05 08:10:04,494 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-05 08:10:04,500 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-05 08:10:04,502 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-05 08:10:04,508 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-05 08:10:04,509 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-05 08:10:04,509 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-05 08:10:04,509 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-05 08:10:04,510 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-05 08:10:04,511 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-05 08:10:04,512 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-05 08:10:04,512 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-05 08:10:04,513 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-05 08:10:04,514 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-05 08:10:04,515 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-05 08:10:04,516 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-05 08:10:04,517 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-05 08:10:04,518 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-05 08:10:04,521 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-05 08:10:04,523 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-05 08:10:04,531 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-05 08:10:04,541 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 08:10:04,541 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 08:10:04,544 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 08:10:04,544 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-05 08:10:04,574 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 08:10:04,575 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 08:10:04,575 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-05 08:10:04,575 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-05 08:10:04,576 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-05 08:10:04,577 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-05 08:10:04,577 INFO L138 SettingsManager]: * Use SBE=true [2022-04-05 08:10:04,577 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 08:10:04,577 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 08:10:04,578 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 08:10:04,578 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 08:10:04,578 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 08:10:04,578 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 08:10:04,578 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 08:10:04,579 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 08:10:04,579 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 08:10:04,579 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 08:10:04,579 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 08:10:04,579 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 08:10:04,579 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 08:10:04,580 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 08:10:04,580 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-05 08:10:04,580 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-05 08:10:04,580 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 08:10:04,581 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-05 08:10:04,581 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-05 08:10:04,581 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-05 08:10:04,581 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-05 08:10:04,583 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 08:10:04,583 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 08:10:04,818 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 08:10:04,840 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 08:10:04,842 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 08:10:04,843 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 08:10:04,848 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 08:10:04,850 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound20.c [2022-04-05 08:10:04,919 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9f4f57be/87950ef93d7048718cf13339a191d4d0/FLAGbe7d233c8 [2022-04-05 08:10:05,295 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 08:10:05,295 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound20.c [2022-04-05 08:10:05,303 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9f4f57be/87950ef93d7048718cf13339a191d4d0/FLAGbe7d233c8 [2022-04-05 08:10:05,693 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9f4f57be/87950ef93d7048718cf13339a191d4d0 [2022-04-05 08:10:05,695 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 08:10:05,696 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 08:10:05,698 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 08:10:05,698 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 08:10:05,700 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 08:10:05,701 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 08:10:05" (1/1) ... [2022-04-05 08:10:05,702 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34050941 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:10:05, skipping insertion in model container [2022-04-05 08:10:05,702 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 08:10:05" (1/1) ... [2022-04-05 08:10:05,708 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 08:10:05,720 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 08:10:05,840 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/hard-u_unwindbound20.c[537,550] [2022-04-05 08:10:05,857 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 08:10:05,864 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 08:10:05,878 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/hard-u_unwindbound20.c[537,550] [2022-04-05 08:10:05,899 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 08:10:05,913 INFO L208 MainTranslator]: Completed translation [2022-04-05 08:10:05,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:10:05 WrapperNode [2022-04-05 08:10:05,915 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 08:10:05,917 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 08:10:05,917 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 08:10:05,917 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 08:10:05,927 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:10:05" (1/1) ... [2022-04-05 08:10:05,927 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:10:05" (1/1) ... [2022-04-05 08:10:05,935 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:10:05" (1/1) ... [2022-04-05 08:10:05,935 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:10:05" (1/1) ... [2022-04-05 08:10:05,941 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:10:05" (1/1) ... [2022-04-05 08:10:05,946 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:10:05" (1/1) ... [2022-04-05 08:10:05,953 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:10:05" (1/1) ... [2022-04-05 08:10:05,954 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 08:10:05,955 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 08:10:05,955 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 08:10:05,955 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 08:10:05,956 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:10:05" (1/1) ... [2022-04-05 08:10:05,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 08:10:05,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 08:10:06,005 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) [2022-04-05 08:10:06,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-05 08:10:06,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 08:10:06,044 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 08:10:06,044 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 08:10:06,045 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-05 08:10:06,045 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 08:10:06,045 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 08:10:06,045 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 08:10:06,046 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 08:10:06,047 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 08:10:06,047 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 08:10:06,047 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-04-05 08:10:06,047 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-05 08:10:06,047 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 08:10:06,047 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 08:10:06,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 08:10:06,048 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 08:10:06,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 08:10:06,048 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 08:10:06,048 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 08:10:06,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 08:10:06,113 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 08:10:06,114 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 08:10:06,270 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 08:10:06,280 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 08:10:06,280 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-05 08:10:06,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 08:10:06 BoogieIcfgContainer [2022-04-05 08:10:06,282 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 08:10:06,295 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 08:10:06,296 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 08:10:06,304 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 08:10:06,307 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 08:10:06" (1/1) ... [2022-04-05 08:10:06,309 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-05 08:10:06,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 08:10:06 BasicIcfg [2022-04-05 08:10:06,330 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 08:10:06,332 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 08:10:06,332 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 08:10:06,342 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 08:10:06,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 08:10:05" (1/4) ... [2022-04-05 08:10:06,343 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ed9145d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 08:10:06, skipping insertion in model container [2022-04-05 08:10:06,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:10:05" (2/4) ... [2022-04-05 08:10:06,343 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ed9145d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 08:10:06, skipping insertion in model container [2022-04-05 08:10:06,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 08:10:06" (3/4) ... [2022-04-05 08:10:06,344 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ed9145d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 08:10:06, skipping insertion in model container [2022-04-05 08:10:06,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 08:10:06" (4/4) ... [2022-04-05 08:10:06,348 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_unwindbound20.cqvasr [2022-04-05 08:10:06,352 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-05 08:10:06,352 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 08:10:06,412 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 08:10:06,421 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-05 08:10:06,422 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 08:10:06,453 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-05 08:10:06,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-05 08:10:06,460 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 08:10:06,460 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 08:10:06,461 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 08:10:06,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 08:10:06,466 INFO L85 PathProgramCache]: Analyzing trace with hash 79654685, now seen corresponding path program 1 times [2022-04-05 08:10:06,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 08:10:06,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316709163] [2022-04-05 08:10:06,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:10:06,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 08:10:06,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:10:06,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 08:10:06,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:10:06,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 08:10:06,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:10:06,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 08:10:06,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 08:10:06,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316709163] [2022-04-05 08:10:06,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316709163] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 08:10:06,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 08:10:06,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-05 08:10:06,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304474796] [2022-04-05 08:10:06,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 08:10:06,701 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-05 08:10:06,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 08:10:06,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-05 08:10:06,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 08:10:06,725 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (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) [2022-04-05 08:10:06,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 08:10:06,846 INFO L93 Difference]: Finished difference Result 66 states and 101 transitions. [2022-04-05 08:10:06,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-05 08:10:06,849 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (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 18 [2022-04-05 08:10:06,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 08:10:06,855 INFO L225 Difference]: With dead ends: 66 [2022-04-05 08:10:06,855 INFO L226 Difference]: Without dead ends: 33 [2022-04-05 08:10:06,858 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 [2022-04-05 08:10:06,861 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 08:10:06,862 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 49 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 08:10:06,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-04-05 08:10:06,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-04-05 08:10:06,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-05 08:10:06,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-04-05 08:10:06,900 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2022-04-05 08:10:06,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 08:10:06,900 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-04-05 08:10:06,900 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (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) [2022-04-05 08:10:06,901 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-04-05 08:10:06,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-05 08:10:06,901 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 08:10:06,901 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 08:10:06,902 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 08:10:06,902 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 08:10:06,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 08:10:06,903 INFO L85 PathProgramCache]: Analyzing trace with hash -85369733, now seen corresponding path program 1 times [2022-04-05 08:10:06,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 08:10:06,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010074722] [2022-04-05 08:10:06,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:10:06,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 08:10:06,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:10:07,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 08:10:07,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:10:07,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 08:10:07,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:10:07,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 08:10:07,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 08:10:07,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010074722] [2022-04-05 08:10:07,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010074722] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 08:10:07,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 08:10:07,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-05 08:10:07,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66401742] [2022-04-05 08:10:07,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 08:10:07,047 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-05 08:10:07,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 08:10:07,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-05 08:10:07,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-05 08:10:07,048 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 08:10:07,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 08:10:07,240 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2022-04-05 08:10:07,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-05 08:10:07,240 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 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 [2022-04-05 08:10:07,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 08:10:07,244 INFO L225 Difference]: With dead ends: 47 [2022-04-05 08:10:07,245 INFO L226 Difference]: Without dead ends: 45 [2022-04-05 08:10:07,254 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-05 08:10:07,255 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 28 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 08:10:07,259 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 90 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 08:10:07,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-04-05 08:10:07,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2022-04-05 08:10:07,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-05 08:10:07,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2022-04-05 08:10:07,268 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2022-04-05 08:10:07,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 08:10:07,269 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2022-04-05 08:10:07,269 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 08:10:07,269 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2022-04-05 08:10:07,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-05 08:10:07,270 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 08:10:07,270 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 08:10:07,270 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-05 08:10:07,270 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 08:10:07,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 08:10:07,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1527809342, now seen corresponding path program 1 times [2022-04-05 08:10:07,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 08:10:07,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346736673] [2022-04-05 08:10:07,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:10:07,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 08:10:07,300 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 08:10:07,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1306139603] [2022-04-05 08:10:07,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:10:07,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:10:07,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 08:10:07,304 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 08:10:07,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-05 08:10:07,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:10:07,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-05 08:10:07,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 08:10:07,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 08:10:07,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 08:10:07,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 08:10:07,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346736673] [2022-04-05 08:10:07,468 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 08:10:07,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306139603] [2022-04-05 08:10:07,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306139603] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 08:10:07,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 08:10:07,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 08:10:07,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977178031] [2022-04-05 08:10:07,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 08:10:07,469 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 08:10:07,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 08:10:07,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 08:10:07,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 08:10:07,470 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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) [2022-04-05 08:10:07,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 08:10:07,487 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2022-04-05 08:10:07,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 08:10:07,489 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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 20 [2022-04-05 08:10:07,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 08:10:07,489 INFO L225 Difference]: With dead ends: 52 [2022-04-05 08:10:07,489 INFO L226 Difference]: Without dead ends: 38 [2022-04-05 08:10:07,490 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 08:10:07,491 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 08:10:07,491 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 107 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 08:10:07,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-04-05 08:10:07,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-04-05 08:10:07,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-05 08:10:07,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2022-04-05 08:10:07,498 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2022-04-05 08:10:07,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 08:10:07,499 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2022-04-05 08:10:07,499 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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) [2022-04-05 08:10:07,502 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2022-04-05 08:10:07,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-05 08:10:07,504 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 08:10:07,504 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 08:10:07,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-05 08:10:07,726 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:10:07,726 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 08:10:07,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 08:10:07,727 INFO L85 PathProgramCache]: Analyzing trace with hash 2128444854, now seen corresponding path program 1 times [2022-04-05 08:10:07,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 08:10:07,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920715041] [2022-04-05 08:10:07,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:10:07,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 08:10:07,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:10:07,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 08:10:07,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:10:07,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 08:10:07,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:10:07,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-04-05 08:10:07,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:10:07,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 08:10:07,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 08:10:07,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920715041] [2022-04-05 08:10:07,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920715041] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 08:10:07,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 08:10:07,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-05 08:10:07,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419594569] [2022-04-05 08:10:07,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 08:10:07,854 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-05 08:10:07,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 08:10:07,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-05 08:10:07,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-05 08:10:07,857 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 08:10:08,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 08:10:08,028 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2022-04-05 08:10:08,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-05 08:10:08,029 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 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 23 [2022-04-05 08:10:08,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 08:10:08,030 INFO L225 Difference]: With dead ends: 52 [2022-04-05 08:10:08,030 INFO L226 Difference]: Without dead ends: 50 [2022-04-05 08:10:08,030 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-05 08:10:08,031 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 23 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 08:10:08,032 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 83 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 08:10:08,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-04-05 08:10:08,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2022-04-05 08:10:08,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-05 08:10:08,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2022-04-05 08:10:08,041 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2022-04-05 08:10:08,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 08:10:08,041 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2022-04-05 08:10:08,041 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 08:10:08,041 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2022-04-05 08:10:08,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-05 08:10:08,042 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 08:10:08,042 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 08:10:08,042 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-05 08:10:08,043 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 08:10:08,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 08:10:08,043 INFO L85 PathProgramCache]: Analyzing trace with hash 135546551, now seen corresponding path program 1 times [2022-04-05 08:10:08,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 08:10:08,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384418179] [2022-04-05 08:10:08,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:10:08,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 08:10:08,053 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 08:10:08,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1666965161] [2022-04-05 08:10:08,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:10:08,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:10:08,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 08:10:08,055 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 08:10:08,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-05 08:10:08,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:10:08,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 08:10:08,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 08:10:08,219 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 08:10:08,219 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 08:10:08,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 08:10:08,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384418179] [2022-04-05 08:10:08,219 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 08:10:08,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666965161] [2022-04-05 08:10:08,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666965161] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 08:10:08,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 08:10:08,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 08:10:08,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416163726] [2022-04-05 08:10:08,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 08:10:08,221 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 08:10:08,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 08:10:08,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 08:10:08,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 08:10:08,222 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 08:10:10,297 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-05 08:10:10,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 08:10:10,467 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2022-04-05 08:10:10,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 08:10:10,467 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-04-05 08:10:10,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 08:10:10,468 INFO L225 Difference]: With dead ends: 59 [2022-04-05 08:10:10,469 INFO L226 Difference]: Without dead ends: 56 [2022-04-05 08:10:10,469 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-05 08:10:10,470 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 10 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-04-05 08:10:10,470 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 140 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-04-05 08:10:10,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-04-05 08:10:10,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-04-05 08:10:10,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 35 states have internal predecessors, (42), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-05 08:10:10,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 71 transitions. [2022-04-05 08:10:10,479 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 71 transitions. Word has length 28 [2022-04-05 08:10:10,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 08:10:10,479 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 71 transitions. [2022-04-05 08:10:10,480 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 08:10:10,480 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 71 transitions. [2022-04-05 08:10:10,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-05 08:10:10,481 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 08:10:10,481 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 08:10:10,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-05 08:10:10,704 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:10:10,704 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 08:10:10,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 08:10:10,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1016025214, now seen corresponding path program 1 times [2022-04-05 08:10:10,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 08:10:10,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830727616] [2022-04-05 08:10:10,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:10:10,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 08:10:10,715 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 08:10:10,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [808853715] [2022-04-05 08:10:10,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:10:10,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:10:10,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 08:10:10,717 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 08:10:10,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-05 08:10:10,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:10:10,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 08:10:10,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 08:10:10,902 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 08:10:10,902 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 08:10:10,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 08:10:10,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830727616] [2022-04-05 08:10:10,905 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 08:10:10,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808853715] [2022-04-05 08:10:10,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808853715] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 08:10:10,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 08:10:10,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 08:10:10,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923736830] [2022-04-05 08:10:10,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 08:10:10,909 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 08:10:10,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 08:10:10,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 08:10:10,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-05 08:10:10,910 INFO L87 Difference]: Start difference. First operand 56 states and 71 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-05 08:10:10,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 08:10:10,971 INFO L93 Difference]: Finished difference Result 76 states and 87 transitions. [2022-04-05 08:10:10,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 08:10:10,972 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2022-04-05 08:10:10,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 08:10:10,974 INFO L225 Difference]: With dead ends: 76 [2022-04-05 08:10:10,975 INFO L226 Difference]: Without dead ends: 69 [2022-04-05 08:10:10,975 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-05 08:10:10,977 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 08:10:10,977 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 117 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 08:10:10,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-04-05 08:10:10,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2022-04-05 08:10:10,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 44 states have internal predecessors, (50), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-05 08:10:10,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2022-04-05 08:10:10,996 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 36 [2022-04-05 08:10:10,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 08:10:10,996 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2022-04-05 08:10:10,997 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-05 08:10:10,997 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2022-04-05 08:10:10,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-05 08:10:10,997 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 08:10:10,997 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 08:10:11,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-05 08:10:11,198 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:10:11,198 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 08:10:11,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 08:10:11,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1017127481, now seen corresponding path program 1 times [2022-04-05 08:10:11,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 08:10:11,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302582398] [2022-04-05 08:10:11,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:10:11,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 08:10:11,209 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 08:10:11,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [74015208] [2022-04-05 08:10:11,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:10:11,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:10:11,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 08:10:11,211 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 08:10:11,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-05 08:10:11,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:10:11,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-05 08:10:11,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 08:10:11,475 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 08:10:11,475 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 08:10:11,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 08:10:11,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302582398] [2022-04-05 08:10:11,475 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 08:10:11,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74015208] [2022-04-05 08:10:11,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74015208] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 08:10:11,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 08:10:11,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-05 08:10:11,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464676556] [2022-04-05 08:10:11,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 08:10:11,477 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-05 08:10:11,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 08:10:11,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-05 08:10:11,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-05 08:10:11,478 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-05 08:10:13,635 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-05 08:10:15,743 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-05 08:10:17,857 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-05 08:10:18,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 08:10:18,036 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2022-04-05 08:10:18,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-05 08:10:18,037 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2022-04-05 08:10:18,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 08:10:18,038 INFO L225 Difference]: With dead ends: 82 [2022-04-05 08:10:18,038 INFO L226 Difference]: Without dead ends: 79 [2022-04-05 08:10:18,039 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-05 08:10:18,040 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 14 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 9 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-04-05 08:10:18,049 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 166 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 92 Invalid, 3 Unknown, 0 Unchecked, 6.5s Time] [2022-04-05 08:10:18,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-04-05 08:10:18,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2022-04-05 08:10:18,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 51 states have internal predecessors, (59), 18 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-05 08:10:18,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 93 transitions. [2022-04-05 08:10:18,064 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 93 transitions. Word has length 36 [2022-04-05 08:10:18,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 08:10:18,065 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 93 transitions. [2022-04-05 08:10:18,065 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-05 08:10:18,065 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 93 transitions. [2022-04-05 08:10:18,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-05 08:10:18,066 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 08:10:18,066 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 08:10:18,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-05 08:10:18,295 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:10:18,295 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 08:10:18,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 08:10:18,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1880362404, now seen corresponding path program 1 times [2022-04-05 08:10:18,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 08:10:18,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114052788] [2022-04-05 08:10:18,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:10:18,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 08:10:18,307 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 08:10:18,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1475783992] [2022-04-05 08:10:18,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:10:18,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:10:18,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 08:10:18,309 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 08:10:18,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-05 08:10:18,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:10:18,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 08:10:18,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 08:10:18,531 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 08:10:18,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 08:10:18,685 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 08:10:18,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 08:10:18,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114052788] [2022-04-05 08:10:18,686 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 08:10:18,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475783992] [2022-04-05 08:10:18,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475783992] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 08:10:18,686 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 08:10:18,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-04-05 08:10:18,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620526786] [2022-04-05 08:10:18,686 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 08:10:18,687 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-05 08:10:18,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 08:10:18,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-05 08:10:18,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-04-05 08:10:18,688 INFO L87 Difference]: Start difference. First operand 78 states and 93 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-04-05 08:10:18,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 08:10:18,887 INFO L93 Difference]: Finished difference Result 160 states and 196 transitions. [2022-04-05 08:10:18,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-05 08:10:18,888 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 38 [2022-04-05 08:10:18,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 08:10:18,890 INFO L225 Difference]: With dead ends: 160 [2022-04-05 08:10:18,890 INFO L226 Difference]: Without dead ends: 146 [2022-04-05 08:10:18,891 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-04-05 08:10:18,891 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 67 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 08:10:18,892 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 224 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 08:10:18,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-04-05 08:10:18,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 138. [2022-04-05 08:10:18,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 88 states have (on average 1.2159090909090908) internal successors, (107), 92 states have internal predecessors, (107), 31 states have call successors, (31), 19 states have call predecessors, (31), 18 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2022-04-05 08:10:18,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 166 transitions. [2022-04-05 08:10:18,922 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 166 transitions. Word has length 38 [2022-04-05 08:10:18,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 08:10:18,922 INFO L478 AbstractCegarLoop]: Abstraction has 138 states and 166 transitions. [2022-04-05 08:10:18,922 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-04-05 08:10:18,922 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 166 transitions. [2022-04-05 08:10:18,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-05 08:10:18,926 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 08:10:18,926 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 08:10:18,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-05 08:10:19,153 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:10:19,153 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 08:10:19,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 08:10:19,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1525733273, now seen corresponding path program 1 times [2022-04-05 08:10:19,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 08:10:19,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966876503] [2022-04-05 08:10:19,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:10:19,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 08:10:19,164 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 08:10:19,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [586282447] [2022-04-05 08:10:19,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:10:19,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:10:19,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 08:10:19,174 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 08:10:19,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-05 08:10:19,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:10:19,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-05 08:10:19,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 08:10:19,608 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-05 08:10:19,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 08:10:19,876 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-05 08:10:19,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 08:10:19,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966876503] [2022-04-05 08:10:19,877 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 08:10:19,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586282447] [2022-04-05 08:10:19,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586282447] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-05 08:10:19,877 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-05 08:10:19,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-04-05 08:10:19,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924808435] [2022-04-05 08:10:19,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 08:10:19,878 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-05 08:10:19,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 08:10:19,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-05 08:10:19,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-04-05 08:10:19,879 INFO L87 Difference]: Start difference. First operand 138 states and 166 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-05 08:10:21,945 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 08:10:24,243 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 08:10:26,356 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 08:10:27,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 08:10:27,085 INFO L93 Difference]: Finished difference Result 162 states and 199 transitions. [2022-04-05 08:10:27,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 08:10:27,086 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2022-04-05 08:10:27,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 08:10:27,088 INFO L225 Difference]: With dead ends: 162 [2022-04-05 08:10:27,088 INFO L226 Difference]: Without dead ends: 160 [2022-04-05 08:10:27,088 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-04-05 08:10:27,089 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 11 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-04-05 08:10:27,089 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 155 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 3 Unknown, 0 Unchecked, 7.2s Time] [2022-04-05 08:10:27,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-04-05 08:10:27,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 154. [2022-04-05 08:10:27,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 98 states have (on average 1.2040816326530612) internal successors, (118), 104 states have internal predecessors, (118), 35 states have call successors, (35), 21 states have call predecessors, (35), 20 states have return successors, (32), 28 states have call predecessors, (32), 32 states have call successors, (32) [2022-04-05 08:10:27,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 185 transitions. [2022-04-05 08:10:27,104 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 185 transitions. Word has length 46 [2022-04-05 08:10:27,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 08:10:27,104 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 185 transitions. [2022-04-05 08:10:27,104 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-05 08:10:27,104 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 185 transitions. [2022-04-05 08:10:27,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-05 08:10:27,105 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 08:10:27,106 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 08:10:27,112 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-04-05 08:10:27,310 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:10:27,311 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 08:10:27,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 08:10:27,311 INFO L85 PathProgramCache]: Analyzing trace with hash 450187565, now seen corresponding path program 1 times [2022-04-05 08:10:27,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 08:10:27,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193153643] [2022-04-05 08:10:27,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:10:27,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 08:10:27,321 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 08:10:27,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1478088925] [2022-04-05 08:10:27,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:10:27,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:10:27,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 08:10:27,331 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 08:10:27,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-05 08:10:27,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:10:27,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-05 08:10:27,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 08:10:27,555 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-05 08:10:27,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 08:10:27,710 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-05 08:10:27,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 08:10:27,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193153643] [2022-04-05 08:10:27,711 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 08:10:27,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478088925] [2022-04-05 08:10:27,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478088925] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 08:10:27,711 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 08:10:27,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-04-05 08:10:27,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078978772] [2022-04-05 08:10:27,712 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 08:10:27,712 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-05 08:10:27,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 08:10:27,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-05 08:10:27,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-04-05 08:10:27,713 INFO L87 Difference]: Start difference. First operand 154 states and 185 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 8 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2022-04-05 08:10:28,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 08:10:28,666 INFO L93 Difference]: Finished difference Result 281 states and 346 transitions. [2022-04-05 08:10:28,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-05 08:10:28,667 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 8 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) Word has length 50 [2022-04-05 08:10:28,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 08:10:28,669 INFO L225 Difference]: With dead ends: 281 [2022-04-05 08:10:28,669 INFO L226 Difference]: Without dead ends: 257 [2022-04-05 08:10:28,669 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-04-05 08:10:28,670 INFO L913 BasicCegarLoop]: 68 mSDtfsCounter, 96 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-05 08:10:28,670 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 330 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-05 08:10:28,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-04-05 08:10:28,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 250. [2022-04-05 08:10:28,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 160 states have (on average 1.2) internal successors, (192), 172 states have internal predecessors, (192), 59 states have call successors, (59), 31 states have call predecessors, (59), 30 states have return successors, (54), 46 states have call predecessors, (54), 54 states have call successors, (54) [2022-04-05 08:10:28,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 305 transitions. [2022-04-05 08:10:28,695 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 305 transitions. Word has length 50 [2022-04-05 08:10:28,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 08:10:28,695 INFO L478 AbstractCegarLoop]: Abstraction has 250 states and 305 transitions. [2022-04-05 08:10:28,696 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 8 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2022-04-05 08:10:28,696 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 305 transitions. [2022-04-05 08:10:28,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-05 08:10:28,702 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 08:10:28,703 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 08:10:28,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-05 08:10:28,919 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:10:28,920 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 08:10:28,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 08:10:28,920 INFO L85 PathProgramCache]: Analyzing trace with hash 451289832, now seen corresponding path program 1 times [2022-04-05 08:10:28,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 08:10:28,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073477168] [2022-04-05 08:10:28,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:10:28,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 08:10:28,934 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 08:10:28,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [258803127] [2022-04-05 08:10:28,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:10:28,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:10:28,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 08:10:28,939 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 08:10:28,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process