/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/ps4-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 09:12:26,578 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 09:12:26,580 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 09:12:26,629 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-05 09:12:26,630 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-05 09:12:26,630 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-05 09:12:26,631 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-05 09:12:26,632 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-05 09:12:26,633 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-05 09:12:26,633 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-05 09:12:26,634 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-05 09:12:26,635 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-05 09:12:26,635 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-05 09:12:26,635 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-05 09:12:26,636 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-05 09:12:26,636 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-05 09:12:26,637 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-05 09:12:26,637 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-05 09:12:26,638 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-05 09:12:26,639 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-05 09:12:26,640 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-05 09:12:26,640 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-05 09:12:26,641 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-05 09:12:26,641 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-05 09:12:26,642 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-05 09:12:26,643 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-05 09:12:26,648 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 09:12:26,648 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 09:12:26,649 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 09:12:26,650 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 09:12:26,668 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 09:12:26,669 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 09:12:26,670 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-05 09:12:26,670 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-05 09:12:26,671 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-05 09:12:26,671 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-05 09:12:26,671 INFO L138 SettingsManager]: * Use SBE=true [2022-04-05 09:12:26,671 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 09:12:26,671 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 09:12:26,672 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 09:12:26,672 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 09:12:26,672 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 09:12:26,672 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 09:12:26,672 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 09:12:26,672 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 09:12:26,672 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 09:12:26,672 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 09:12:26,672 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 09:12:26,673 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 09:12:26,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 09:12:26,673 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 09:12:26,673 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-05 09:12:26,673 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-05 09:12:26,673 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 09:12:26,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-05 09:12:26,673 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-05 09:12:26,673 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-05 09:12:26,673 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-05 09:12:26,674 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 09:12:26,674 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 09:12:26,838 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 09:12:26,859 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 09:12:26,861 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 09:12:26,861 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 09:12:26,862 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 09:12:26,863 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound50.c [2022-04-05 09:12:26,901 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02aa0c604/25e823012b494f53b57498fc5fd281c1/FLAGe30a507b1 [2022-04-05 09:12:27,243 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 09:12:27,243 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound50.c [2022-04-05 09:12:27,247 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02aa0c604/25e823012b494f53b57498fc5fd281c1/FLAGe30a507b1 [2022-04-05 09:12:27,254 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02aa0c604/25e823012b494f53b57498fc5fd281c1 [2022-04-05 09:12:27,256 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 09:12:27,257 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 09:12:27,259 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 09:12:27,259 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 09:12:27,261 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 09:12:27,262 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 09:12:27" (1/1) ... [2022-04-05 09:12:27,262 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16131e3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:12:27, skipping insertion in model container [2022-04-05 09:12:27,262 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 09:12:27" (1/1) ... [2022-04-05 09:12:27,266 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 09:12:27,274 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 09:12:27,369 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/ps4-ll_valuebound50.c[458,471] [2022-04-05 09:12:27,394 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 09:12:27,399 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 09:12:27,408 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/ps4-ll_valuebound50.c[458,471] [2022-04-05 09:12:27,413 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 09:12:27,420 INFO L208 MainTranslator]: Completed translation [2022-04-05 09:12:27,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:12:27 WrapperNode [2022-04-05 09:12:27,420 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 09:12:27,421 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 09:12:27,421 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 09:12:27,421 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 09:12:27,427 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:12:27" (1/1) ... [2022-04-05 09:12:27,428 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:12:27" (1/1) ... [2022-04-05 09:12:27,431 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:12:27" (1/1) ... [2022-04-05 09:12:27,431 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:12:27" (1/1) ... [2022-04-05 09:12:27,441 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:12:27" (1/1) ... [2022-04-05 09:12:27,443 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:12:27" (1/1) ... [2022-04-05 09:12:27,444 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:12:27" (1/1) ... [2022-04-05 09:12:27,445 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 09:12:27,446 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 09:12:27,446 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 09:12:27,446 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 09:12:27,447 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:12:27" (1/1) ... [2022-04-05 09:12:27,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 09:12:27,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:12:27,467 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 09:12:27,472 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 09:12:27,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 09:12:27,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 09:12:27,498 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 09:12:27,498 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-05 09:12:27,498 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 09:12:27,498 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 09:12:27,498 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 09:12:27,498 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 09:12:27,499 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 09:12:27,499 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 09:12:27,499 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2022-04-05 09:12:27,499 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-05 09:12:27,499 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 09:12:27,499 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 09:12:27,499 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 09:12:27,499 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 09:12:27,499 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 09:12:27,499 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 09:12:27,499 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 09:12:27,499 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 09:12:27,544 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 09:12:27,545 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 09:12:27,646 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 09:12:27,649 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 09:12:27,649 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-05 09:12:27,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 09:12:27 BoogieIcfgContainer [2022-04-05 09:12:27,651 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 09:12:27,652 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 09:12:27,652 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 09:12:27,652 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 09:12:27,654 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 09:12:27" (1/1) ... [2022-04-05 09:12:27,656 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-05 09:12:27,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 09:12:27 BasicIcfg [2022-04-05 09:12:27,669 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 09:12:27,676 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 09:12:27,676 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 09:12:27,678 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 09:12:27,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 09:12:27" (1/4) ... [2022-04-05 09:12:27,679 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4893a336 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 09:12:27, skipping insertion in model container [2022-04-05 09:12:27,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 09:12:27" (2/4) ... [2022-04-05 09:12:27,679 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4893a336 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 09:12:27, skipping insertion in model container [2022-04-05 09:12:27,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 09:12:27" (3/4) ... [2022-04-05 09:12:27,679 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4893a336 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 09:12:27, skipping insertion in model container [2022-04-05 09:12:27,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 09:12:27" (4/4) ... [2022-04-05 09:12:27,680 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_valuebound50.cqvasr [2022-04-05 09:12:27,683 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-05 09:12:27,683 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 09:12:27,721 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 09:12:27,725 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 09:12:27,725 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 09:12:27,735 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-05 09:12:27,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-05 09:12:27,742 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:12:27,742 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:12:27,743 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:12:27,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:12:27,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1885409022, now seen corresponding path program 1 times [2022-04-05 09:12:27,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:12:27,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551121854] [2022-04-05 09:12:27,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:12:27,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:12:27,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:12:27,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 09:12:27,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:12:27,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 09:12:27,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:12:27,912 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 09:12:27,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:12:27,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551121854] [2022-04-05 09:12:27,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551121854] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 09:12:27,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 09:12:27,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-05 09:12:27,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366060419] [2022-04-05 09:12:27,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 09:12:27,917 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-05 09:12:27,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:12:27,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-05 09:12:27,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 09:12:27,945 INFO L87 Difference]: Start difference. First operand has 28 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 09:12:28,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:12:28,004 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2022-04-05 09:12:28,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-05 09:12:28,006 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-04-05 09:12:28,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:12:28,013 INFO L225 Difference]: With dead ends: 47 [2022-04-05 09:12:28,014 INFO L226 Difference]: Without dead ends: 23 [2022-04-05 09:12:28,016 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 09:12:28,021 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 09:12:28,022 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 29 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 09:12:28,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-04-05 09:12:28,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-04-05 09:12:28,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-05 09:12:28,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2022-04-05 09:12:28,055 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 17 [2022-04-05 09:12:28,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:12:28,056 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2022-04-05 09:12:28,056 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 09:12:28,056 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2022-04-05 09:12:28,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-05 09:12:28,057 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:12:28,057 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:12:28,058 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 09:12:28,058 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:12:28,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:12:28,059 INFO L85 PathProgramCache]: Analyzing trace with hash 603980644, now seen corresponding path program 1 times [2022-04-05 09:12:28,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:12:28,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432846639] [2022-04-05 09:12:28,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:12:28,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:12:28,093 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:12:28,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [346520692] [2022-04-05 09:12:28,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:12:28,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:12:28,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:12:28,108 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 09:12:28,112 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 09:12:28,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:12:28,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 09:12:28,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:12:28,255 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 09:12:28,255 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 09:12:28,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:12:28,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432846639] [2022-04-05 09:12:28,255 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:12:28,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346520692] [2022-04-05 09:12:28,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346520692] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 09:12:28,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 09:12:28,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 09:12:28,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78583607] [2022-04-05 09:12:28,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 09:12:28,260 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 09:12:28,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:12:28,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 09:12:28,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 09:12:28,261 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 09:12:28,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:12:28,305 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-04-05 09:12:28,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 09:12:28,306 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-04-05 09:12:28,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:12:28,306 INFO L225 Difference]: With dead ends: 34 [2022-04-05 09:12:28,307 INFO L226 Difference]: Without dead ends: 30 [2022-04-05 09:12:28,307 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 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 09:12:28,308 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 09:12:28,308 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 77 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 09:12:28,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-04-05 09:12:28,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-04-05 09:12:28,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-05 09:12:28,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-04-05 09:12:28,314 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 17 [2022-04-05 09:12:28,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:12:28,314 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-04-05 09:12:28,314 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 09:12:28,314 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-04-05 09:12:28,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-05 09:12:28,315 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:12:28,315 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:12:28,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-05 09:12:28,517 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:12:28,518 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:12:28,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:12:28,518 INFO L85 PathProgramCache]: Analyzing trace with hash -169450186, now seen corresponding path program 1 times [2022-04-05 09:12:28,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:12:28,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886548262] [2022-04-05 09:12:28,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:12:28,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:12:28,533 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:12:28,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1117285897] [2022-04-05 09:12:28,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:12:28,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:12:28,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:12:28,537 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 09:12:28,538 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 09:12:28,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:12:28,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-05 09:12:28,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:12:28,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 09:12:28,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:12:29,106 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 09:12:29,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:12:29,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886548262] [2022-04-05 09:12:29,108 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:12:29,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117285897] [2022-04-05 09:12:29,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117285897] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-05 09:12:29,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-05 09:12:29,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-04-05 09:12:29,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837931743] [2022-04-05 09:12:29,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 09:12:29,109 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 09:12:29,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:12:29,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 09:12:29,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-04-05 09:12:29,110 INFO L87 Difference]: Start difference. First operand 30 states and 32 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 09:12:29,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:12:29,148 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2022-04-05 09:12:29,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 09:12:29,149 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-04-05 09:12:29,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:12:29,150 INFO L225 Difference]: With dead ends: 36 [2022-04-05 09:12:29,150 INFO L226 Difference]: Without dead ends: 31 [2022-04-05 09:12:29,151 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-05 09:12:29,153 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 09:12:29,155 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 70 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 09:12:29,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-04-05 09:12:29,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-04-05 09:12:29,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-05 09:12:29,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2022-04-05 09:12:29,166 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 24 [2022-04-05 09:12:29,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:12:29,166 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2022-04-05 09:12:29,167 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 09:12:29,167 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2022-04-05 09:12:29,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-05 09:12:29,168 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:12:29,168 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:12:29,185 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 09:12:29,383 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-05 09:12:29,384 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:12:29,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:12:29,384 INFO L85 PathProgramCache]: Analyzing trace with hash -434891502, now seen corresponding path program 1 times [2022-04-05 09:12:29,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:12:29,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995963283] [2022-04-05 09:12:29,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:12:29,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:12:29,392 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:12:29,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1961685862] [2022-04-05 09:12:29,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:12:29,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:12:29,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:12:29,394 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 09:12:29,407 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 09:12:29,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:12:29,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-05 09:12:29,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:12:29,600 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 09:12:29,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:12:29,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:12:29,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995963283] [2022-04-05 09:12:29,748 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:12:29,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961685862] [2022-04-05 09:12:29,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961685862] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 09:12:29,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 09:12:29,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-04-05 09:12:29,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184815597] [2022-04-05 09:12:29,748 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 09:12:29,748 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-05 09:12:29,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:12:29,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-05 09:12:29,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-05 09:12:29,749 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-05 09:12:29,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:12:29,802 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2022-04-05 09:12:29,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-05 09:12:29,802 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2022-04-05 09:12:29,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:12:29,803 INFO L225 Difference]: With dead ends: 39 [2022-04-05 09:12:29,803 INFO L226 Difference]: Without dead ends: 34 [2022-04-05 09:12:29,803 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-04-05 09:12:29,804 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 09:12:29,804 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 115 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 09:12:29,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-04-05 09:12:29,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-04-05 09:12:29,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-05 09:12:29,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2022-04-05 09:12:29,808 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 30 [2022-04-05 09:12:29,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:12:29,808 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2022-04-05 09:12:29,808 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-05 09:12:29,809 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2022-04-05 09:12:29,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-05 09:12:29,809 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:12:29,809 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:12:29,827 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 09:12:30,023 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:12:30,024 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:12:30,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:12:30,024 INFO L85 PathProgramCache]: Analyzing trace with hash 725792896, now seen corresponding path program 2 times [2022-04-05 09:12:30,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:12:30,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078745261] [2022-04-05 09:12:30,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:12:30,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:12:30,030 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:12:30,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1125960137] [2022-04-05 09:12:30,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 09:12:30,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:12:30,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:12:30,044 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 09:12:30,045 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 09:12:30,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 09:12:30,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 09:12:30,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-05 09:12:30,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:12:30,211 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 09:12:30,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:12:30,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:12:30,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078745261] [2022-04-05 09:12:30,313 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:12:30,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125960137] [2022-04-05 09:12:30,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125960137] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 09:12:30,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 09:12:30,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-04-05 09:12:30,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121345142] [2022-04-05 09:12:30,313 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 09:12:30,314 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-05 09:12:30,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:12:30,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-05 09:12:30,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-04-05 09:12:30,315 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 09:12:30,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:12:30,379 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2022-04-05 09:12:30,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-05 09:12:30,391 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 37 [2022-04-05 09:12:30,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:12:30,392 INFO L225 Difference]: With dead ends: 42 [2022-04-05 09:12:30,392 INFO L226 Difference]: Without dead ends: 37 [2022-04-05 09:12:30,392 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-04-05 09:12:30,393 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 09:12:30,393 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 143 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 09:12:30,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-04-05 09:12:30,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-04-05 09:12:30,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-05 09:12:30,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2022-04-05 09:12:30,397 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 37 [2022-04-05 09:12:30,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:12:30,397 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2022-04-05 09:12:30,398 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 09:12:30,398 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2022-04-05 09:12:30,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-05 09:12:30,398 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:12:30,398 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:12:30,416 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 09:12:30,616 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:12:30,616 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:12:30,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:12:30,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1487404370, now seen corresponding path program 3 times [2022-04-05 09:12:30,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:12:30,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184311065] [2022-04-05 09:12:30,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:12:30,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:12:30,623 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:12:30,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1323047363] [2022-04-05 09:12:30,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 09:12:30,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:12:30,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:12:30,624 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 09:12:30,625 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 09:12:30,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-04-05 09:12:30,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 09:12:30,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-05 09:12:30,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:12:30,850 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-05 09:12:30,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:12:30,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:12:30,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184311065] [2022-04-05 09:12:30,947 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:12:30,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323047363] [2022-04-05 09:12:30,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323047363] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 09:12:30,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 09:12:30,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-04-05 09:12:30,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049833041] [2022-04-05 09:12:30,948 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 09:12:30,948 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-05 09:12:30,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:12:30,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-05 09:12:30,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-04-05 09:12:30,949 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-04-05 09:12:31,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:12:31,037 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2022-04-05 09:12:31,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-05 09:12:31,037 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 44 [2022-04-05 09:12:31,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:12:31,038 INFO L225 Difference]: With dead ends: 45 [2022-04-05 09:12:31,038 INFO L226 Difference]: Without dead ends: 40 [2022-04-05 09:12:31,038 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-04-05 09:12:31,047 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 09:12:31,047 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 173 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 09:12:31,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-04-05 09:12:31,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-04-05 09:12:31,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-05 09:12:31,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2022-04-05 09:12:31,060 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 44 [2022-04-05 09:12:31,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:12:31,060 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2022-04-05 09:12:31,061 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-04-05 09:12:31,062 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2022-04-05 09:12:31,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-05 09:12:31,063 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:12:31,063 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:12:31,070 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 09:12:31,267 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:12:31,268 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:12:31,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:12:31,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1178929216, now seen corresponding path program 4 times [2022-04-05 09:12:31,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:12:31,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111957901] [2022-04-05 09:12:31,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:12:31,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:12:31,278 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:12:31,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [839816871] [2022-04-05 09:12:31,278 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 09:12:31,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:12:31,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:12:31,279 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 09:12:31,280 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 09:12:31,489 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 09:12:31,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 09:12:31,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-05 09:12:31,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:12:31,683 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-05 09:12:31,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:12:31,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:12:31,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111957901] [2022-04-05 09:12:31,791 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:12:31,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839816871] [2022-04-05 09:12:31,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839816871] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 09:12:31,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 09:12:31,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-04-05 09:12:31,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646175290] [2022-04-05 09:12:31,791 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 09:12:31,792 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-05 09:12:31,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:12:31,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-05 09:12:31,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-04-05 09:12:31,792 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-04-05 09:12:31,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:12:31,884 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2022-04-05 09:12:31,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-05 09:12:31,885 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 51 [2022-04-05 09:12:31,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:12:31,885 INFO L225 Difference]: With dead ends: 48 [2022-04-05 09:12:31,886 INFO L226 Difference]: Without dead ends: 43 [2022-04-05 09:12:31,886 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-04-05 09:12:31,886 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 2 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 09:12:31,886 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 205 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 09:12:31,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-04-05 09:12:31,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-04-05 09:12:31,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 10 states have call successors, (10), 6 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 09:12:31,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2022-04-05 09:12:31,891 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 51 [2022-04-05 09:12:31,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:12:31,891 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2022-04-05 09:12:31,891 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-04-05 09:12:31,891 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2022-04-05 09:12:31,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-05 09:12:31,892 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:12:31,892 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:12:31,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-05 09:12:32,110 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:12:32,110 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:12:32,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:12:32,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1658817134, now seen corresponding path program 5 times [2022-04-05 09:12:32,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:12:32,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632342904] [2022-04-05 09:12:32,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:12:32,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:12:32,119 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:12:32,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1972046939] [2022-04-05 09:12:32,119 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 09:12:32,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:12:32,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:12:32,123 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 09:12:32,123 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 09:12:32,230 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-04-05 09:12:32,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 09:12:32,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-05 09:12:32,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:12:32,395 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-05 09:12:32,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:12:32,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:12:32,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632342904] [2022-04-05 09:12:32,511 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:12:32,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972046939] [2022-04-05 09:12:32,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972046939] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 09:12:32,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 09:12:32,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-04-05 09:12:32,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407217983] [2022-04-05 09:12:32,512 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 09:12:32,512 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-05 09:12:32,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:12:32,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-05 09:12:32,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-04-05 09:12:32,513 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-04-05 09:12:32,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:12:32,631 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2022-04-05 09:12:32,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-05 09:12:32,631 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 58 [2022-04-05 09:12:32,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:12:32,632 INFO L225 Difference]: With dead ends: 51 [2022-04-05 09:12:32,632 INFO L226 Difference]: Without dead ends: 46 [2022-04-05 09:12:32,632 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-04-05 09:12:32,633 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 2 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 09:12:32,633 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 239 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 09:12:32,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-04-05 09:12:32,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-04-05 09:12:32,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 11 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-05 09:12:32,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2022-04-05 09:12:32,638 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 58 [2022-04-05 09:12:32,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:12:32,638 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2022-04-05 09:12:32,638 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-04-05 09:12:32,638 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2022-04-05 09:12:32,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-05 09:12:32,639 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:12:32,639 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:12:32,645 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-04-05 09:12:32,843 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:12:32,843 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:12:32,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:12:32,844 INFO L85 PathProgramCache]: Analyzing trace with hash 270583808, now seen corresponding path program 6 times [2022-04-05 09:12:32,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:12:32,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585765649] [2022-04-05 09:12:32,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:12:32,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:12:32,850 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:12:32,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1549087177] [2022-04-05 09:12:32,850 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 09:12:32,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:12:32,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:12:32,852 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 09:12:32,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-05 09:12:32,983 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-05 09:12:32,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 09:12:32,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-05 09:12:32,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:12:33,232 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 14 proven. 63 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-05 09:12:33,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:12:33,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:12:33,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585765649] [2022-04-05 09:12:33,334 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:12:33,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549087177] [2022-04-05 09:12:33,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549087177] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 09:12:33,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 09:12:33,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-04-05 09:12:33,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929821914] [2022-04-05 09:12:33,334 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 09:12:33,335 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-05 09:12:33,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:12:33,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-05 09:12:33,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-04-05 09:12:33,335 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-04-05 09:12:33,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:12:33,484 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2022-04-05 09:12:33,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-05 09:12:33,484 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 65 [2022-04-05 09:12:33,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:12:33,485 INFO L225 Difference]: With dead ends: 54 [2022-04-05 09:12:33,485 INFO L226 Difference]: Without dead ends: 49 [2022-04-05 09:12:33,485 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-04-05 09:12:33,486 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 2 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 09:12:33,486 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 275 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 09:12:33,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-04-05 09:12:33,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-04-05 09:12:33,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 12 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-05 09:12:33,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2022-04-05 09:12:33,491 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 65 [2022-04-05 09:12:33,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:12:33,491 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2022-04-05 09:12:33,491 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-04-05 09:12:33,491 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2022-04-05 09:12:33,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-04-05 09:12:33,492 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:12:33,492 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:12:33,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-05 09:12:33,698 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-04-05 09:12:33,699 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:12:33,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:12:33,699 INFO L85 PathProgramCache]: Analyzing trace with hash 4292050, now seen corresponding path program 7 times [2022-04-05 09:12:33,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:12:33,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165858727] [2022-04-05 09:12:33,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:12:33,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:12:33,706 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:12:33,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1299069062] [2022-04-05 09:12:33,706 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 09:12:33,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:12:33,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:12:33,710 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 09:12:33,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-05 09:12:34,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:12:34,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-05 09:12:34,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:12:34,277 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 16 proven. 84 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-05 09:12:34,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:12:34,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:12:34,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165858727] [2022-04-05 09:12:34,426 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:12:34,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299069062] [2022-04-05 09:12:34,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299069062] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 09:12:34,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 09:12:34,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-04-05 09:12:34,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029137418] [2022-04-05 09:12:34,426 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 09:12:34,426 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-05 09:12:34,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:12:34,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-05 09:12:34,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-04-05 09:12:34,427 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-04-05 09:12:34,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:12:34,610 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2022-04-05 09:12:34,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-05 09:12:34,610 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 72 [2022-04-05 09:12:34,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:12:34,611 INFO L225 Difference]: With dead ends: 57 [2022-04-05 09:12:34,611 INFO L226 Difference]: Without dead ends: 52 [2022-04-05 09:12:34,611 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-04-05 09:12:34,612 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 2 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 09:12:34,612 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 313 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 09:12:34,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-04-05 09:12:34,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-04-05 09:12:34,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 13 states have call successors, (13), 6 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-05 09:12:34,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2022-04-05 09:12:34,617 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 72 [2022-04-05 09:12:34,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:12:34,617 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2022-04-05 09:12:34,617 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-04-05 09:12:34,617 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2022-04-05 09:12:34,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-04-05 09:12:34,618 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:12:34,618 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:12:34,624 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-04-05 09:12:34,822 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-05 09:12:34,822 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:12:34,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:12:34,822 INFO L85 PathProgramCache]: Analyzing trace with hash 395442112, now seen corresponding path program 8 times [2022-04-05 09:12:34,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:12:34,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546667293] [2022-04-05 09:12:34,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:12:34,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:12:34,828 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:12:34,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1047099119] [2022-04-05 09:12:34,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 09:12:34,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:12:34,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:12:34,830 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 09:12:34,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-05 09:12:35,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 09:12:35,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 09:12:35,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 40 conjunts are in the unsatisfiable core [2022-04-05 09:12:35,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:12:35,615 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 18 proven. 108 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-05 09:12:35,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:12:35,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:12:35,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546667293] [2022-04-05 09:12:35,718 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:12:35,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047099119] [2022-04-05 09:12:35,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047099119] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 09:12:35,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 09:12:35,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-04-05 09:12:35,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399504444] [2022-04-05 09:12:35,719 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 09:12:35,719 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-05 09:12:35,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:12:35,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-05 09:12:35,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-04-05 09:12:35,719 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-04-05 09:12:35,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:12:35,910 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2022-04-05 09:12:35,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-05 09:12:35,910 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 79 [2022-04-05 09:12:35,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:12:35,911 INFO L225 Difference]: With dead ends: 60 [2022-04-05 09:12:35,911 INFO L226 Difference]: Without dead ends: 55 [2022-04-05 09:12:35,911 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-04-05 09:12:35,912 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 2 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 09:12:35,912 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 353 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 09:12:35,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-04-05 09:12:35,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-04-05 09:12:35,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 14 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-05 09:12:35,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2022-04-05 09:12:35,917 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 79 [2022-04-05 09:12:35,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:12:35,917 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2022-04-05 09:12:35,917 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-04-05 09:12:35,917 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2022-04-05 09:12:35,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-04-05 09:12:35,918 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:12:35,918 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:12:35,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-05 09:12:36,122 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-04-05 09:12:36,123 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:12:36,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:12:36,123 INFO L85 PathProgramCache]: Analyzing trace with hash 667883026, now seen corresponding path program 9 times [2022-04-05 09:12:36,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:12:36,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864129586] [2022-04-05 09:12:36,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:12:36,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:12:36,129 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:12:36,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1865744746] [2022-04-05 09:12:36,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 09:12:36,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:12:36,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:12:36,130 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 09:12:36,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-05 09:12:36,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-04-05 09:12:36,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 09:12:36,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-05 09:12:36,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:12:36,728 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 20 proven. 135 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-05 09:12:36,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:12:36,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:12:36,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864129586] [2022-04-05 09:12:36,952 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:12:36,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865744746] [2022-04-05 09:12:36,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865744746] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 09:12:36,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 09:12:36,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-04-05 09:12:36,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168669106] [2022-04-05 09:12:36,953 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 09:12:36,953 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-05 09:12:36,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:12:36,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-05 09:12:36,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-04-05 09:12:36,954 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 12 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-04-05 09:12:37,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:12:37,205 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2022-04-05 09:12:37,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-05 09:12:37,205 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 12 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 86 [2022-04-05 09:12:37,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:12:37,206 INFO L225 Difference]: With dead ends: 63 [2022-04-05 09:12:37,206 INFO L226 Difference]: Without dead ends: 58 [2022-04-05 09:12:37,206 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-04-05 09:12:37,207 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 2 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 09:12:37,207 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 393 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 09:12:37,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-04-05 09:12:37,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-04-05 09:12:37,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 15 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-05 09:12:37,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2022-04-05 09:12:37,214 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 86 [2022-04-05 09:12:37,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:12:37,214 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2022-04-05 09:12:37,214 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 12 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-04-05 09:12:37,214 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2022-04-05 09:12:37,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-04-05 09:12:37,218 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:12:37,218 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:12:37,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-05 09:12:37,427 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-04-05 09:12:37,427 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:12:37,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:12:37,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1918146432, now seen corresponding path program 10 times [2022-04-05 09:12:37,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:12:37,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505087551] [2022-04-05 09:12:37,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:12:37,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:12:37,435 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:12:37,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2039341938] [2022-04-05 09:12:37,436 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 09:12:37,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:12:37,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:12:37,446 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 09:12:37,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-05 09:12:37,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 09:12:37,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 09:12:37,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 48 conjunts are in the unsatisfiable core [2022-04-05 09:12:37,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:12:38,234 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 22 proven. 165 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-05 09:12:38,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:12:38,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:12:38,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505087551] [2022-04-05 09:12:38,375 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:12:38,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039341938] [2022-04-05 09:12:38,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039341938] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 09:12:38,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 09:12:38,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-04-05 09:12:38,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891065900] [2022-04-05 09:12:38,375 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 09:12:38,375 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-05 09:12:38,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:12:38,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-05 09:12:38,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-04-05 09:12:38,376 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2022-04-05 09:12:38,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:12:38,627 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2022-04-05 09:12:38,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-05 09:12:38,628 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) Word has length 93 [2022-04-05 09:12:38,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:12:38,628 INFO L225 Difference]: With dead ends: 66 [2022-04-05 09:12:38,628 INFO L226 Difference]: Without dead ends: 61 [2022-04-05 09:12:38,629 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-04-05 09:12:38,629 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 2 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 09:12:38,629 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 439 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 09:12:38,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-04-05 09:12:38,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-04-05 09:12:38,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 40 states have (on average 1.025) internal successors, (41), 40 states have internal predecessors, (41), 16 states have call successors, (16), 6 states have call predecessors, (16), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-05 09:12:38,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2022-04-05 09:12:38,634 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 93 [2022-04-05 09:12:38,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:12:38,634 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2022-04-05 09:12:38,634 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2022-04-05 09:12:38,635 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2022-04-05 09:12:38,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-04-05 09:12:38,635 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:12:38,635 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:12:38,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-05 09:12:38,840 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-05 09:12:38,840 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:12:38,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:12:38,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1384988242, now seen corresponding path program 11 times [2022-04-05 09:12:38,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:12:38,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588716064] [2022-04-05 09:12:38,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:12:38,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:12:38,846 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:12:38,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [405496772] [2022-04-05 09:12:38,847 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 09:12:38,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:12:38,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:12:38,847 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 09:12:38,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-05 09:12:39,415 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-04-05 09:12:39,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 09:12:39,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-05 09:12:39,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:12:39,792 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 24 proven. 198 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-05 09:12:39,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:12:40,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:12:40,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588716064] [2022-04-05 09:12:40,484 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:12:40,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405496772] [2022-04-05 09:12:40,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405496772] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 09:12:40,484 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 09:12:40,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-04-05 09:12:40,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274988557] [2022-04-05 09:12:40,484 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 09:12:40,484 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-05 09:12:40,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:12:40,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-05 09:12:40,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=685, Unknown=0, NotChecked=0, Total=870 [2022-04-05 09:12:40,485 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 14 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-04-05 09:12:40,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:12:40,788 INFO L93 Difference]: Finished difference Result 69 states and 80 transitions. [2022-04-05 09:12:40,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-05 09:12:40,788 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 14 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) Word has length 100 [2022-04-05 09:12:40,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:12:40,788 INFO L225 Difference]: With dead ends: 69 [2022-04-05 09:12:40,789 INFO L226 Difference]: Without dead ends: 64 [2022-04-05 09:12:40,789 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 153 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=195, Invalid=797, Unknown=0, NotChecked=0, Total=992 [2022-04-05 09:12:40,789 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 2 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 09:12:40,789 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 475 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 09:12:40,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-04-05 09:12:40,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-04-05 09:12:40,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 states have internal predecessors, (43), 17 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-05 09:12:40,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2022-04-05 09:12:40,795 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 100 [2022-04-05 09:12:40,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:12:40,795 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2022-04-05 09:12:40,795 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 14 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-04-05 09:12:40,795 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2022-04-05 09:12:40,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-04-05 09:12:40,796 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:12:40,796 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:12:40,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-05 09:12:40,996 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-05 09:12:40,996 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:12:40,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:12:40,997 INFO L85 PathProgramCache]: Analyzing trace with hash 2099554112, now seen corresponding path program 12 times [2022-04-05 09:12:40,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:12:40,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843925130] [2022-04-05 09:12:40,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:12:40,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:12:41,002 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:12:41,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [815680981] [2022-04-05 09:12:41,003 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 09:12:41,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:12:41,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:12:41,005 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 09:12:41,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-05 09:12:41,224 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-04-05 09:12:41,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 09:12:41,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 68 conjunts are in the unsatisfiable core [2022-04-05 09:12:41,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:12:41,680 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 90 proven. 236 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-04-05 09:12:41,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:12:57,269 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_main_~y~0 1))) (or (= (+ (* .cse0 c_main_~k~0) c_main_~k~0) (+ (* 2 c_main_~y~0) 3 (* .cse0 .cse0))) (< (+ 2 c_main_~c~0) c_main_~k~0) (not (= (mod (+ (* (- 13) .cse0 .cse0) (* (- 1) .cse0 .cse0 .cse0 .cse0) (* (- 6) .cse0 .cse0 .cse0)) 4) 0)) (<= c_main_~k~0 (+ c_main_~c~0 1)))) is different from false [2022-04-05 09:14:14,475 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 5 c_main_~y~0))) (or (< (+ 6 c_main_~c~0) c_main_~k~0) (= (+ (* .cse0 c_main_~k~0) c_main_~k~0) (+ (* 2 c_main_~y~0) (* .cse0 .cse0) 11)) (not (= (mod (+ (* .cse0 .cse0 .cse0 (- 6)) (* (- 1) .cse0 .cse0 .cse0 .cse0) (* (- 13) .cse0 .cse0)) 4) 0)) (<= c_main_~k~0 (+ 5 c_main_~c~0)))) is different from false [2022-04-05 09:14:22,523 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((main_~k~0 Int)) (or (<= main_~k~0 (+ 6 c_main_~c~0)) (< (+ 7 c_main_~c~0) main_~k~0) (= (+ (* 7 main_~k~0) (* main_~k~0 c_main_~y~0)) (+ (* 14 c_main_~y~0) 49 (* c_main_~y~0 c_main_~y~0))))) (not (= (mod (let ((.cse0 (+ 6 c_main_~y~0))) (+ (* (- 1) .cse0 .cse0 .cse0 .cse0) (* .cse0 .cse0 .cse0 (- 6)) (* (- 13) .cse0 .cse0))) 4) 0))) is different from false [2022-04-05 09:14:24,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:14:24,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843925130] [2022-04-05 09:14:24,552 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:14:24,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815680981] [2022-04-05 09:14:24,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815680981] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 09:14:24,552 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 09:14:24,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-04-05 09:14:24,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486853543] [2022-04-05 09:14:24,553 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 09:14:24,553 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-05 09:14:24,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:14:24,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-05 09:14:24,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=787, Unknown=3, NotChecked=180, Total=1122 [2022-04-05 09:14:24,554 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 19 states have internal predecessors, (42), 15 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-04-05 09:14:25,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:14:25,033 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2022-04-05 09:14:25,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-05 09:14:25,033 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 19 states have internal predecessors, (42), 15 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) Word has length 107 [2022-04-05 09:14:25,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:14:25,034 INFO L225 Difference]: With dead ends: 72 [2022-04-05 09:14:25,034 INFO L226 Difference]: Without dead ends: 67 [2022-04-05 09:14:25,036 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 62.7s TimeCoverageRelationStatistics Valid=173, Invalid=958, Unknown=3, NotChecked=198, Total=1332 [2022-04-05 09:14:25,037 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 8 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 09:14:25,037 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 515 Invalid, 896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 894 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-05 09:14:25,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-04-05 09:14:25,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-04-05 09:14:25,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 18 states have call successors, (18), 6 states have call predecessors, (18), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-05 09:14:25,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2022-04-05 09:14:25,048 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 107 [2022-04-05 09:14:25,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:14:25,049 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2022-04-05 09:14:25,049 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 19 states have internal predecessors, (42), 15 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-04-05 09:14:25,049 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2022-04-05 09:14:25,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-04-05 09:14:25,050 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:14:25,050 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:14:25,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-05 09:14:25,255 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:14:25,255 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:14:25,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:14:25,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1740638574, now seen corresponding path program 13 times [2022-04-05 09:14:25,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:14:25,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071406947] [2022-04-05 09:14:25,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:14:25,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:14:25,261 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:14:25,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [490212360] [2022-04-05 09:14:25,261 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 09:14:25,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:14:25,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:14:25,262 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 09:14:25,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-05 09:14:26,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:14:26,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 71 conjunts are in the unsatisfiable core [2022-04-05 09:14:26,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:14:26,484 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 98 proven. 275 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2022-04-05 09:14:26,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:14:54,265 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((main_~k~0 Int)) (or (< (+ c_main_~c~0 1) main_~k~0) (not (< c_main_~c~0 main_~k~0)) (let ((.cse0 (+ c_main_~y~0 1))) (= (* .cse0 .cse0) (* main_~k~0 .cse0))))) (not (= (mod (+ (* (- 6) c_main_~y~0 c_main_~y~0 c_main_~y~0) (* (- 13) c_main_~y~0 c_main_~y~0) (* (- 1) c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) 4) 0))) is different from false [2022-04-05 09:14:54,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:14:54,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071406947] [2022-04-05 09:14:54,267 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:14:54,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490212360] [2022-04-05 09:14:54,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490212360] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 09:14:54,268 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 09:14:54,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-04-05 09:14:54,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989056853] [2022-04-05 09:14:54,268 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 09:14:54,268 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-05 09:14:54,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:14:54,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-05 09:14:54,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=667, Unknown=5, NotChecked=52, Total=812 [2022-04-05 09:14:54,269 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 16 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2022-04-05 09:14:54,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:14:54,745 INFO L93 Difference]: Finished difference Result 75 states and 88 transitions. [2022-04-05 09:14:54,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-05 09:14:54,745 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 16 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) Word has length 114 [2022-04-05 09:14:54,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:14:54,746 INFO L225 Difference]: With dead ends: 75 [2022-04-05 09:14:54,746 INFO L226 Difference]: Without dead ends: 70 [2022-04-05 09:14:54,746 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 23.9s TimeCoverageRelationStatistics Valid=109, Invalid=820, Unknown=5, NotChecked=58, Total=992 [2022-04-05 09:14:54,746 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 8 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 948 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 09:14:54,747 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 541 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 948 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-05 09:14:54,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-04-05 09:14:54,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-04-05 09:14:54,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 19 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-05 09:14:54,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 83 transitions. [2022-04-05 09:14:54,753 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 83 transitions. Word has length 114 [2022-04-05 09:14:54,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:14:54,754 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 83 transitions. [2022-04-05 09:14:54,754 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 16 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2022-04-05 09:14:54,754 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 83 transitions. [2022-04-05 09:14:54,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-04-05 09:14:54,754 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:14:54,754 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:14:54,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-05 09:14:54,955 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-04-05 09:14:54,955 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:14:54,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:14:54,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1682036992, now seen corresponding path program 14 times [2022-04-05 09:14:54,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:14:54,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274123036] [2022-04-05 09:14:54,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:14:54,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:14:54,961 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:14:54,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [88526862] [2022-04-05 09:14:54,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 09:14:54,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:14:54,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:14:54,965 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 09:14:54,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-05 09:14:55,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 09:14:55,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 09:14:55,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 64 conjunts are in the unsatisfiable core [2022-04-05 09:14:55,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:14:55,829 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 30 proven. 315 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-05 09:14:55,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:14:56,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:14:56,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274123036] [2022-04-05 09:14:56,015 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:14:56,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88526862] [2022-04-05 09:14:56,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88526862] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 09:14:56,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 09:14:56,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-04-05 09:14:56,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568192970] [2022-04-05 09:14:56,016 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 09:14:56,016 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-05 09:14:56,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:14:56,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-05 09:14:56,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-04-05 09:14:56,016 INFO L87 Difference]: Start difference. First operand 70 states and 83 transitions. Second operand has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 17 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2022-04-05 09:14:56,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:14:56,468 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2022-04-05 09:14:56,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-05 09:14:56,468 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 17 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) Word has length 121 [2022-04-05 09:14:56,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:14:56,469 INFO L225 Difference]: With dead ends: 78 [2022-04-05 09:14:56,469 INFO L226 Difference]: Without dead ends: 73 [2022-04-05 09:14:56,469 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-04-05 09:14:56,470 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 2 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 09:14:56,470 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 635 Invalid, 857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 857 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-05 09:14:56,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-04-05 09:14:56,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-04-05 09:14:56,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 48 states have internal predecessors, (49), 20 states have call successors, (20), 6 states have call predecessors, (20), 4 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-05 09:14:56,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 87 transitions. [2022-04-05 09:14:56,476 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 87 transitions. Word has length 121 [2022-04-05 09:14:56,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:14:56,476 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 87 transitions. [2022-04-05 09:14:56,476 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 17 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2022-04-05 09:14:56,476 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 87 transitions. [2022-04-05 09:14:56,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-04-05 09:14:56,477 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:14:56,477 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:14:56,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-05 09:14:56,681 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-05 09:14:56,681 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:14:56,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:14:56,682 INFO L85 PathProgramCache]: Analyzing trace with hash 699088594, now seen corresponding path program 15 times [2022-04-05 09:14:56,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:14:56,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670469817] [2022-04-05 09:14:56,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:14:56,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:14:56,688 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:14:56,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [722674197] [2022-04-05 09:14:56,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 09:14:56,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:14:56,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:14:56,689 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 09:14:56,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-05 09:14:57,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-04-05 09:14:57,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 09:14:57,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 69 conjunts are in the unsatisfiable core [2022-04-05 09:14:57,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:14:57,661 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 32 proven. 360 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-05 09:14:57,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:14:58,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:14:58,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670469817] [2022-04-05 09:14:58,653 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:14:58,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722674197] [2022-04-05 09:14:58,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722674197] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 09:14:58,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 09:14:58,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-04-05 09:14:58,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834922049] [2022-04-05 09:14:58,654 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 09:14:58,654 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-05 09:14:58,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:14:58,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-05 09:14:58,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=1101, Unknown=0, NotChecked=0, Total=1406 [2022-04-05 09:14:58,655 INFO L87 Difference]: Start difference. First operand 73 states and 87 transitions. Second operand has 21 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 18 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2022-04-05 09:14:59,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:14:59,159 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2022-04-05 09:14:59,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-05 09:14:59,159 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 18 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) Word has length 128 [2022-04-05 09:14:59,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:14:59,159 INFO L225 Difference]: With dead ends: 81 [2022-04-05 09:14:59,160 INFO L226 Difference]: Without dead ends: 76 [2022-04-05 09:14:59,160 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 201 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=315, Invalid=1245, Unknown=0, NotChecked=0, Total=1560 [2022-04-05 09:14:59,160 INFO L913 BasicCegarLoop]: 67 mSDtfsCounter, 2 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 975 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-05 09:14:59,160 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 675 Invalid, 975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 975 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-05 09:14:59,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-04-05 09:14:59,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2022-04-05 09:14:59,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 21 states have call successors, (21), 6 states have call predecessors, (21), 4 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-05 09:14:59,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 91 transitions. [2022-04-05 09:14:59,166 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 91 transitions. Word has length 128 [2022-04-05 09:14:59,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:14:59,166 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 91 transitions. [2022-04-05 09:14:59,167 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 18 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2022-04-05 09:14:59,167 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 91 transitions. [2022-04-05 09:14:59,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-04-05 09:14:59,167 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:14:59,167 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:14:59,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-04-05 09:14:59,372 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-05 09:14:59,373 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:14:59,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:14:59,373 INFO L85 PathProgramCache]: Analyzing trace with hash -119728448, now seen corresponding path program 16 times [2022-04-05 09:14:59,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:14:59,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858089826] [2022-04-05 09:14:59,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:14:59,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:14:59,379 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:14:59,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2129059422] [2022-04-05 09:14:59,379 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 09:14:59,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:14:59,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:14:59,380 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 09:14:59,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-05 09:14:59,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 09:14:59,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 09:14:59,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 83 conjunts are in the unsatisfiable core [2022-04-05 09:14:59,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:15:00,223 INFO L134 CoverageAnalysis]: Checked inductivity of 986 backedges. 122 proven. 410 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2022-04-05 09:15:00,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:15:30,508 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((main_~k~0 Int)) (or (< (+ c_main_~c~0 1) main_~k~0) (not (< c_main_~c~0 main_~k~0)) (let ((.cse0 (+ c_main_~y~0 1))) (= (* .cse0 .cse0) (* main_~k~0 .cse0))))) (not (= (mod (+ (* (- 6) c_main_~y~0 c_main_~y~0 c_main_~y~0) (* (- 13) c_main_~y~0 c_main_~y~0) (* (- 1) c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) 4) 0))) is different from false [2022-04-05 09:15:30,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:15:30,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858089826] [2022-04-05 09:15:30,510 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:15:30,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129059422] [2022-04-05 09:15:30,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129059422] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 09:15:30,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 09:15:30,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2022-04-05 09:15:30,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50168356] [2022-04-05 09:15:30,511 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 09:15:30,511 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-05 09:15:30,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:15:30,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-05 09:15:30,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=832, Unknown=5, NotChecked=58, Total=992 [2022-04-05 09:15:30,511 INFO L87 Difference]: Start difference. First operand 76 states and 91 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 23 states have internal predecessors, (50), 19 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) [2022-04-05 09:15:31,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:15:31,192 INFO L93 Difference]: Finished difference Result 84 states and 100 transitions. [2022-04-05 09:15:31,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-05 09:15:31,192 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 23 states have internal predecessors, (50), 19 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) Word has length 135 [2022-04-05 09:15:31,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:15:31,193 INFO L225 Difference]: With dead ends: 84 [2022-04-05 09:15:31,193 INFO L226 Difference]: Without dead ends: 79 [2022-04-05 09:15:31,193 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 26.4s TimeCoverageRelationStatistics Valid=118, Invalid=1003, Unknown=5, NotChecked=64, Total=1190 [2022-04-05 09:15:31,194 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 8 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 1294 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 1296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-05 09:15:31,194 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 693 Invalid, 1296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1294 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-05 09:15:31,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-04-05 09:15:31,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-04-05 09:15:31,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 22 states have call successors, (22), 6 states have call predecessors, (22), 4 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-04-05 09:15:31,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 95 transitions. [2022-04-05 09:15:31,200 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 95 transitions. Word has length 135 [2022-04-05 09:15:31,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:15:31,200 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 95 transitions. [2022-04-05 09:15:31,200 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 23 states have internal predecessors, (50), 19 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) [2022-04-05 09:15:31,200 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 95 transitions. [2022-04-05 09:15:31,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-04-05 09:15:31,201 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:15:31,201 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:15:31,207 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-04-05 09:15:31,405 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:15:31,406 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:15:31,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:15:31,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1869408494, now seen corresponding path program 17 times [2022-04-05 09:15:31,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:15:31,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584474804] [2022-04-05 09:15:31,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:15:31,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:15:31,412 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:15:31,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [680492719] [2022-04-05 09:15:31,412 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 09:15:31,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:15:31,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:15:31,413 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 09:15:31,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-05 09:15:32,526 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2022-04-05 09:15:32,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 09:15:32,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 76 conjunts are in the unsatisfiable core [2022-04-05 09:15:32,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:15:32,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 36 proven. 459 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-04-05 09:15:32,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:15:33,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:15:33,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584474804] [2022-04-05 09:15:33,155 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:15:33,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680492719] [2022-04-05 09:15:33,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680492719] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 09:15:33,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 09:15:33,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-04-05 09:15:33,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347805653] [2022-04-05 09:15:33,155 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 09:15:33,155 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-05 09:15:33,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:15:33,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-05 09:15:33,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2022-04-05 09:15:33,156 INFO L87 Difference]: Start difference. First operand 79 states and 95 transitions. Second operand has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 20 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) [2022-04-05 09:15:33,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:15:33,782 INFO L93 Difference]: Finished difference Result 87 states and 104 transitions. [2022-04-05 09:15:33,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-05 09:15:33,783 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 20 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) Word has length 142 [2022-04-05 09:15:33,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:15:33,783 INFO L225 Difference]: With dead ends: 87 [2022-04-05 09:15:33,783 INFO L226 Difference]: Without dead ends: 82 [2022-04-05 09:15:33,784 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2022-04-05 09:15:33,784 INFO L913 BasicCegarLoop]: 73 mSDtfsCounter, 2 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 1187 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 803 SdHoareTripleChecker+Invalid, 1187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-05 09:15:33,784 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 803 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1187 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-05 09:15:33,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-04-05 09:15:33,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-04-05 09:15:33,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 54 states have internal predecessors, (55), 23 states have call successors, (23), 6 states have call predecessors, (23), 4 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-04-05 09:15:33,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 99 transitions. [2022-04-05 09:15:33,791 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 99 transitions. Word has length 142 [2022-04-05 09:15:33,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:15:33,791 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 99 transitions. [2022-04-05 09:15:33,791 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 20 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) [2022-04-05 09:15:33,791 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 99 transitions. [2022-04-05 09:15:33,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-04-05 09:15:33,792 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:15:33,792 INFO L499 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:15:33,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-05 09:15:34,000 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:15:34,000 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:15:34,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:15:34,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1178433152, now seen corresponding path program 18 times [2022-04-05 09:15:34,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:15:34,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108434697] [2022-04-05 09:15:34,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:15:34,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:15:34,006 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:15:34,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1170671061] [2022-04-05 09:15:34,006 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 09:15:34,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:15:34,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:15:34,007 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 09:15:34,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-05 09:15:36,897 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-04-05 09:15:36,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 09:15:36,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 81 conjunts are in the unsatisfiable core [2022-04-05 09:15:36,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:15:37,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 38 proven. 513 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2022-04-05 09:15:37,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:15:38,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:15:38,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108434697] [2022-04-05 09:15:38,503 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:15:38,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170671061] [2022-04-05 09:15:38,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170671061] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 09:15:38,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 09:15:38,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2022-04-05 09:15:38,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919055718] [2022-04-05 09:15:38,503 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 09:15:38,504 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-05 09:15:38,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:15:38,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-05 09:15:38,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1056, Unknown=0, NotChecked=0, Total=1332 [2022-04-05 09:15:38,504 INFO L87 Difference]: Start difference. First operand 82 states and 99 transitions. Second operand has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 21 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) [2022-04-05 09:15:39,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:15:39,190 INFO L93 Difference]: Finished difference Result 90 states and 108 transitions. [2022-04-05 09:15:39,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-05 09:15:39,191 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 21 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) Word has length 149 [2022-04-05 09:15:39,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:15:39,191 INFO L225 Difference]: With dead ends: 90 [2022-04-05 09:15:39,191 INFO L226 Difference]: Without dead ends: 85 [2022-04-05 09:15:39,192 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 195 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=286, Invalid=1196, Unknown=0, NotChecked=0, Total=1482 [2022-04-05 09:15:39,192 INFO L913 BasicCegarLoop]: 76 mSDtfsCounter, 2 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 1319 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 853 SdHoareTripleChecker+Invalid, 1319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-05 09:15:39,192 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 853 Invalid, 1319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1319 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-05 09:15:39,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-04-05 09:15:39,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-04-05 09:15:39,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 56 states have internal predecessors, (57), 24 states have call successors, (24), 6 states have call predecessors, (24), 4 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-04-05 09:15:39,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 103 transitions. [2022-04-05 09:15:39,200 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 103 transitions. Word has length 149 [2022-04-05 09:15:39,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:15:39,201 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 103 transitions. [2022-04-05 09:15:39,201 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 21 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) [2022-04-05 09:15:39,201 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 103 transitions. [2022-04-05 09:15:39,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-04-05 09:15:39,201 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:15:39,201 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:15:39,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-04-05 09:15:39,407 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-04-05 09:15:39,408 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:15:39,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:15:39,408 INFO L85 PathProgramCache]: Analyzing trace with hash -272924846, now seen corresponding path program 19 times [2022-04-05 09:15:39,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:15:39,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625680045] [2022-04-05 09:15:39,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:15:39,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:15:39,417 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:15:39,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1612310007] [2022-04-05 09:15:39,417 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 09:15:39,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:15:39,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:15:39,418 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 09:15:39,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-05 09:15:40,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:15:40,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 84 conjunts are in the unsatisfiable core [2022-04-05 09:15:40,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:15:40,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 40 proven. 570 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-04-05 09:15:40,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:15:40,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:15:40,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625680045] [2022-04-05 09:15:40,730 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:15:40,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612310007] [2022-04-05 09:15:40,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612310007] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 09:15:40,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 09:15:40,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2022-04-05 09:15:40,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831090217] [2022-04-05 09:15:40,730 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 09:15:40,731 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-05 09:15:40,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:15:40,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-05 09:15:40,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2022-04-05 09:15:40,731 INFO L87 Difference]: Start difference. First operand 85 states and 103 transitions. Second operand has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 22 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2022-04-05 09:15:41,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:15:41,466 INFO L93 Difference]: Finished difference Result 93 states and 112 transitions. [2022-04-05 09:15:41,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-05 09:15:41,468 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 22 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) Word has length 156 [2022-04-05 09:15:41,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:15:41,468 INFO L225 Difference]: With dead ends: 93 [2022-04-05 09:15:41,468 INFO L226 Difference]: Without dead ends: 88 [2022-04-05 09:15:41,469 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2022-04-05 09:15:41,469 INFO L913 BasicCegarLoop]: 79 mSDtfsCounter, 2 mSDsluCounter, 846 mSDsCounter, 0 mSdLazyCounter, 1437 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 925 SdHoareTripleChecker+Invalid, 1437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-05 09:15:41,469 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 925 Invalid, 1437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1437 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-05 09:15:41,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-04-05 09:15:41,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-04-05 09:15:41,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 58 states have internal predecessors, (59), 25 states have call successors, (25), 6 states have call predecessors, (25), 4 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-04-05 09:15:41,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 107 transitions. [2022-04-05 09:15:41,476 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 107 transitions. Word has length 156 [2022-04-05 09:15:41,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:15:41,477 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 107 transitions. [2022-04-05 09:15:41,477 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 22 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2022-04-05 09:15:41,477 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 107 transitions. [2022-04-05 09:15:41,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-04-05 09:15:41,477 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:15:41,477 INFO L499 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:15:41,482 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-04-05 09:15:41,682 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-04-05 09:15:41,682 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:15:41,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:15:41,683 INFO L85 PathProgramCache]: Analyzing trace with hash 2090550848, now seen corresponding path program 20 times [2022-04-05 09:15:41,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:15:41,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713553578] [2022-04-05 09:15:41,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:15:41,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:15:41,689 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:15:41,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1233939512] [2022-04-05 09:15:41,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 09:15:41,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:15:41,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:15:41,691 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 09:15:41,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-05 09:15:42,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 09:15:42,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 09:15:42,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 88 conjunts are in the unsatisfiable core [2022-04-05 09:15:42,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:15:42,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 42 proven. 630 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-04-05 09:15:42,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:15:42,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:15:42,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713553578] [2022-04-05 09:15:42,994 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:15:42,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233939512] [2022-04-05 09:15:42,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233939512] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 09:15:42,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 09:15:42,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2022-04-05 09:15:42,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349114063] [2022-04-05 09:15:42,994 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 09:15:42,994 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-05 09:15:42,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:15:42,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-05 09:15:42,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2022-04-05 09:15:42,995 INFO L87 Difference]: Start difference. First operand 88 states and 107 transitions. Second operand has 26 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 23 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 22 states have call predecessors, (23), 22 states have call successors, (23) [2022-04-05 09:15:43,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:15:43,751 INFO L93 Difference]: Finished difference Result 96 states and 116 transitions. [2022-04-05 09:15:43,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-05 09:15:43,751 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 23 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 22 states have call predecessors, (23), 22 states have call successors, (23) Word has length 163 [2022-04-05 09:15:43,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:15:43,752 INFO L225 Difference]: With dead ends: 96 [2022-04-05 09:15:43,752 INFO L226 Difference]: Without dead ends: 91 [2022-04-05 09:15:43,752 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2022-04-05 09:15:43,753 INFO L913 BasicCegarLoop]: 82 mSDtfsCounter, 2 mSDsluCounter, 907 mSDsCounter, 0 mSdLazyCounter, 1571 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 989 SdHoareTripleChecker+Invalid, 1571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-05 09:15:43,754 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 989 Invalid, 1571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1571 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-05 09:15:43,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-04-05 09:15:43,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-04-05 09:15:43,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 states have internal predecessors, (61), 26 states have call successors, (26), 6 states have call predecessors, (26), 4 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-05 09:15:43,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 111 transitions. [2022-04-05 09:15:43,761 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 111 transitions. Word has length 163 [2022-04-05 09:15:43,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:15:43,761 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 111 transitions. [2022-04-05 09:15:43,762 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 23 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 22 states have call predecessors, (23), 22 states have call successors, (23) [2022-04-05 09:15:43,762 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 111 transitions. [2022-04-05 09:15:43,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-04-05 09:15:43,763 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:15:43,763 INFO L499 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:15:43,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-04-05 09:15:43,968 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:15:43,968 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:15:43,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:15:43,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1122531218, now seen corresponding path program 21 times [2022-04-05 09:15:43,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:15:43,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581749113] [2022-04-05 09:15:43,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:15:43,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:15:43,975 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:15:43,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [738848817] [2022-04-05 09:15:43,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 09:15:43,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:15:43,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:15:43,976 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 09:15:43,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-04-05 09:15:44,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2022-04-05 09:15:44,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 09:15:44,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 92 conjunts are in the unsatisfiable core [2022-04-05 09:15:44,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:15:45,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 44 proven. 693 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2022-04-05 09:15:45,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:15:45,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:15:45,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581749113] [2022-04-05 09:15:45,447 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:15:45,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738848817] [2022-04-05 09:15:45,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738848817] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 09:15:45,447 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 09:15:45,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2022-04-05 09:15:45,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067421493] [2022-04-05 09:15:45,447 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 09:15:45,447 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-05 09:15:45,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:15:45,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-05 09:15:45,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2022-04-05 09:15:45,448 INFO L87 Difference]: Start difference. First operand 91 states and 111 transitions. Second operand has 27 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 24 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 23 states have call predecessors, (24), 23 states have call successors, (24) [2022-04-05 09:15:46,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:15:46,336 INFO L93 Difference]: Finished difference Result 99 states and 120 transitions. [2022-04-05 09:15:46,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-05 09:15:46,336 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 24 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 23 states have call predecessors, (24), 23 states have call successors, (24) Word has length 170 [2022-04-05 09:15:46,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:15:46,338 INFO L225 Difference]: With dead ends: 99 [2022-04-05 09:15:46,338 INFO L226 Difference]: Without dead ends: 94 [2022-04-05 09:15:46,338 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 153 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2022-04-05 09:15:46,338 INFO L913 BasicCegarLoop]: 85 mSDtfsCounter, 2 mSDsluCounter, 970 mSDsCounter, 0 mSdLazyCounter, 1711 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1055 SdHoareTripleChecker+Invalid, 1711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-05 09:15:46,339 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1055 Invalid, 1711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1711 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-05 09:15:46,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-04-05 09:15:46,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-04-05 09:15:46,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 62 states have (on average 1.0161290322580645) internal successors, (63), 62 states have internal predecessors, (63), 27 states have call successors, (27), 6 states have call predecessors, (27), 4 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-04-05 09:15:46,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 115 transitions. [2022-04-05 09:15:46,347 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 115 transitions. Word has length 170 [2022-04-05 09:15:46,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:15:46,348 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 115 transitions. [2022-04-05 09:15:46,351 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 24 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 23 states have call predecessors, (24), 23 states have call successors, (24) [2022-04-05 09:15:46,351 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 115 transitions. [2022-04-05 09:15:46,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-04-05 09:15:46,352 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:15:46,352 INFO L499 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:15:46,360 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-04-05 09:15:46,558 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:15:46,558 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:15:46,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:15:46,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1682799104, now seen corresponding path program 22 times [2022-04-05 09:15:46,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:15:46,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992282170] [2022-04-05 09:15:46,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:15:46,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:15:46,564 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:15:46,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [324280735] [2022-04-05 09:15:46,564 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 09:15:46,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:15:46,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:15:46,565 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 09:15:46,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-04-05 09:15:47,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 09:15:47,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 09:15:47,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 96 conjunts are in the unsatisfiable core [2022-04-05 09:15:47,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:15:47,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1817 backedges. 46 proven. 759 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-04-05 09:15:47,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:15:47,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:15:47,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992282170] [2022-04-05 09:15:47,910 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:15:47,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324280735] [2022-04-05 09:15:47,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324280735] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 09:15:47,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 09:15:47,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2022-04-05 09:15:47,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018797261] [2022-04-05 09:15:47,910 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 09:15:47,910 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-05 09:15:47,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:15:47,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-05 09:15:47,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2022-04-05 09:15:47,911 INFO L87 Difference]: Start difference. First operand 94 states and 115 transitions. Second operand has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 25 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) [2022-04-05 09:15:48,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:15:48,818 INFO L93 Difference]: Finished difference Result 102 states and 124 transitions. [2022-04-05 09:15:48,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-05 09:15:48,819 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 25 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) Word has length 177 [2022-04-05 09:15:48,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:15:48,819 INFO L225 Difference]: With dead ends: 102 [2022-04-05 09:15:48,820 INFO L226 Difference]: Without dead ends: 97 [2022-04-05 09:15:48,820 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2022-04-05 09:15:48,820 INFO L913 BasicCegarLoop]: 88 mSDtfsCounter, 2 mSDsluCounter, 1035 mSDsCounter, 0 mSdLazyCounter, 1857 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1123 SdHoareTripleChecker+Invalid, 1857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-05 09:15:48,820 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1123 Invalid, 1857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1857 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-05 09:15:48,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-04-05 09:15:48,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-04-05 09:15:48,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 64 states have (on average 1.015625) internal successors, (65), 64 states have internal predecessors, (65), 28 states have call successors, (28), 6 states have call predecessors, (28), 4 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-04-05 09:15:48,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 119 transitions. [2022-04-05 09:15:48,828 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 119 transitions. Word has length 177 [2022-04-05 09:15:48,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:15:48,829 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 119 transitions. [2022-04-05 09:15:48,829 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 25 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) [2022-04-05 09:15:48,829 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 119 transitions. [2022-04-05 09:15:48,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-04-05 09:15:48,829 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:15:48,830 INFO L499 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:15:48,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-04-05 09:15:49,034 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-04-05 09:15:49,035 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:15:49,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:15:49,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1629618222, now seen corresponding path program 23 times [2022-04-05 09:15:49,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:15:49,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170796772] [2022-04-05 09:15:49,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:15:49,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:15:49,041 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:15:49,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [747719542] [2022-04-05 09:15:49,041 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 09:15:49,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:15:49,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:15:49,042 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 09:15:49,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-04-05 09:16:09,198 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-04-05 09:16:09,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 09:16:09,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 100 conjunts are in the unsatisfiable core [2022-04-05 09:16:09,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:16:09,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 48 proven. 828 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2022-04-05 09:16:09,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:16:10,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:16:10,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170796772] [2022-04-05 09:16:10,010 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:16:10,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747719542] [2022-04-05 09:16:10,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747719542] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 09:16:10,010 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 09:16:10,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2022-04-05 09:16:10,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828741086] [2022-04-05 09:16:10,011 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 09:16:10,011 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-05 09:16:10,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:16:10,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-05 09:16:10,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2022-04-05 09:16:10,012 INFO L87 Difference]: Start difference. First operand 97 states and 119 transitions. Second operand has 29 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 26 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 25 states have call predecessors, (26), 25 states have call successors, (26) [2022-04-05 09:16:11,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:16:11,009 INFO L93 Difference]: Finished difference Result 105 states and 128 transitions. [2022-04-05 09:16:11,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-05 09:16:11,010 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 26 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 25 states have call predecessors, (26), 25 states have call successors, (26) Word has length 184 [2022-04-05 09:16:11,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:16:11,010 INFO L225 Difference]: With dead ends: 105 [2022-04-05 09:16:11,010 INFO L226 Difference]: Without dead ends: 100 [2022-04-05 09:16:11,011 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 165 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=1022, Unknown=0, NotChecked=0, Total=1122 [2022-04-05 09:16:11,011 INFO L913 BasicCegarLoop]: 91 mSDtfsCounter, 2 mSDsluCounter, 1102 mSDsCounter, 0 mSdLazyCounter, 2009 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1193 SdHoareTripleChecker+Invalid, 2009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-05 09:16:11,011 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1193 Invalid, 2009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2009 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-05 09:16:11,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-04-05 09:16:11,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-04-05 09:16:11,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 66 states have internal predecessors, (67), 29 states have call successors, (29), 6 states have call predecessors, (29), 4 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-04-05 09:16:11,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 123 transitions. [2022-04-05 09:16:11,021 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 123 transitions. Word has length 184 [2022-04-05 09:16:11,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:16:11,021 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 123 transitions. [2022-04-05 09:16:11,021 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 26 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 25 states have call predecessors, (26), 25 states have call successors, (26) [2022-04-05 09:16:11,021 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 123 transitions. [2022-04-05 09:16:11,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-04-05 09:16:11,022 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:16:11,022 INFO L499 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:16:11,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-04-05 09:16:11,225 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-04-05 09:16:11,226 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:16:11,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:16:11,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1782527424, now seen corresponding path program 24 times [2022-04-05 09:16:11,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:16:11,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583560622] [2022-04-05 09:16:11,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:16:11,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:16:11,233 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:16:11,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1671085593] [2022-04-05 09:16:11,234 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 09:16:11,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:16:11,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:16:11,234 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 09:16:11,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-04-05 09:16:11,985 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2022-04-05 09:16:11,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 09:16:11,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 104 conjunts are in the unsatisfiable core [2022-04-05 09:16:11,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:16:12,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2150 backedges. 50 proven. 900 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2022-04-05 09:16:12,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:16:12,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:16:12,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583560622] [2022-04-05 09:16:12,869 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:16:12,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671085593] [2022-04-05 09:16:12,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671085593] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 09:16:12,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 09:16:12,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2022-04-05 09:16:12,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104333326] [2022-04-05 09:16:12,869 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 09:16:12,870 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-05 09:16:12,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:16:12,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-05 09:16:12,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2022-04-05 09:16:12,870 INFO L87 Difference]: Start difference. First operand 100 states and 123 transitions. Second operand has 30 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 27 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 26 states have call predecessors, (27), 26 states have call successors, (27) [2022-04-05 09:16:13,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:16:13,902 INFO L93 Difference]: Finished difference Result 108 states and 132 transitions. [2022-04-05 09:16:13,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-05 09:16:13,902 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 27 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 26 states have call predecessors, (27), 26 states have call successors, (27) Word has length 191 [2022-04-05 09:16:13,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:16:13,903 INFO L225 Difference]: With dead ends: 108 [2022-04-05 09:16:13,903 INFO L226 Difference]: Without dead ends: 103 [2022-04-05 09:16:13,903 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=1087, Unknown=0, NotChecked=0, Total=1190 [2022-04-05 09:16:13,904 INFO L913 BasicCegarLoop]: 94 mSDtfsCounter, 2 mSDsluCounter, 1171 mSDsCounter, 0 mSdLazyCounter, 2167 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1265 SdHoareTripleChecker+Invalid, 2167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-05 09:16:13,904 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1265 Invalid, 2167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2167 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-05 09:16:13,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-04-05 09:16:13,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-04-05 09:16:13,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 68 states have internal predecessors, (69), 30 states have call successors, (30), 6 states have call predecessors, (30), 4 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-04-05 09:16:13,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 127 transitions. [2022-04-05 09:16:13,912 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 127 transitions. Word has length 191 [2022-04-05 09:16:13,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:16:13,912 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 127 transitions. [2022-04-05 09:16:13,912 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 27 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 26 states have call predecessors, (27), 26 states have call successors, (27) [2022-04-05 09:16:13,913 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 127 transitions. [2022-04-05 09:16:13,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-04-05 09:16:13,913 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:16:13,913 INFO L499 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:16:13,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-04-05 09:16:14,119 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-04-05 09:16:14,119 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:16:14,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:16:14,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1902123026, now seen corresponding path program 25 times [2022-04-05 09:16:14,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:16:14,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229604901] [2022-04-05 09:16:14,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:16:14,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:16:14,128 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:16:14,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1675848880] [2022-04-05 09:16:14,128 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 09:16:14,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:16:14,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:16:14,129 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 09:16:14,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-04-05 09:16:14,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 09:16:14,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 108 conjunts are in the unsatisfiable core [2022-04-05 09:16:14,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:16:15,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2327 backedges. 52 proven. 975 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2022-04-05 09:16:15,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:16:15,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:16:15,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229604901] [2022-04-05 09:16:15,854 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:16:15,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675848880] [2022-04-05 09:16:15,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675848880] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 09:16:15,854 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 09:16:15,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2022-04-05 09:16:15,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716633548] [2022-04-05 09:16:15,855 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 09:16:15,855 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-05 09:16:15,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:16:15,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-05 09:16:15,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2022-04-05 09:16:15,855 INFO L87 Difference]: Start difference. First operand 103 states and 127 transitions. Second operand has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 28 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 27 states have call predecessors, (28), 27 states have call successors, (28) [2022-04-05 09:16:16,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:16:16,990 INFO L93 Difference]: Finished difference Result 111 states and 136 transitions. [2022-04-05 09:16:16,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-05 09:16:16,990 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 28 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 27 states have call predecessors, (28), 27 states have call successors, (28) Word has length 198 [2022-04-05 09:16:16,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:16:16,991 INFO L225 Difference]: With dead ends: 111 [2022-04-05 09:16:16,991 INFO L226 Difference]: Without dead ends: 106 [2022-04-05 09:16:16,992 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 177 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=1154, Unknown=0, NotChecked=0, Total=1260 [2022-04-05 09:16:16,992 INFO L913 BasicCegarLoop]: 97 mSDtfsCounter, 2 mSDsluCounter, 1242 mSDsCounter, 0 mSdLazyCounter, 2331 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1339 SdHoareTripleChecker+Invalid, 2331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-05 09:16:16,992 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1339 Invalid, 2331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2331 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-05 09:16:16,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-04-05 09:16:17,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2022-04-05 09:16:17,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 70 states have (on average 1.0142857142857142) internal successors, (71), 70 states have internal predecessors, (71), 31 states have call successors, (31), 6 states have call predecessors, (31), 4 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-04-05 09:16:17,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 131 transitions. [2022-04-05 09:16:17,000 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 131 transitions. Word has length 198 [2022-04-05 09:16:17,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:16:17,001 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 131 transitions. [2022-04-05 09:16:17,001 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 28 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 27 states have call predecessors, (28), 27 states have call successors, (28) [2022-04-05 09:16:17,001 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 131 transitions. [2022-04-05 09:16:17,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-04-05 09:16:17,002 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:16:17,002 INFO L499 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:16:17,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-04-05 09:16:17,207 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-04-05 09:16:17,207 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:16:17,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:16:17,208 INFO L85 PathProgramCache]: Analyzing trace with hash 905794944, now seen corresponding path program 26 times [2022-04-05 09:16:17,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:16:17,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707854084] [2022-04-05 09:16:17,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:16:17,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:16:17,214 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:16:17,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1741766432] [2022-04-05 09:16:17,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 09:16:17,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:16:17,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:16:17,215 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 09:16:17,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-04-05 09:16:17,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 09:16:17,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 09:16:17,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 112 conjunts are in the unsatisfiable core [2022-04-05 09:16:17,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:16:18,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2511 backedges. 54 proven. 1053 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2022-04-05 09:16:18,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:16:18,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:16:18,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707854084] [2022-04-05 09:16:18,782 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:16:18,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741766432] [2022-04-05 09:16:18,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741766432] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 09:16:18,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 09:16:18,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2022-04-05 09:16:18,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701066628] [2022-04-05 09:16:18,782 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 09:16:18,783 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-05 09:16:18,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:16:18,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-05 09:16:18,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2022-04-05 09:16:18,783 INFO L87 Difference]: Start difference. First operand 106 states and 131 transitions. Second operand has 32 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 29 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 28 states have call predecessors, (29), 28 states have call successors, (29) [2022-04-05 09:16:19,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:16:19,980 INFO L93 Difference]: Finished difference Result 114 states and 140 transitions. [2022-04-05 09:16:19,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-05 09:16:19,980 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 29 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 28 states have call predecessors, (29), 28 states have call successors, (29) Word has length 205 [2022-04-05 09:16:19,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:16:19,981 INFO L225 Difference]: With dead ends: 114 [2022-04-05 09:16:19,981 INFO L226 Difference]: Without dead ends: 109 [2022-04-05 09:16:19,982 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 183 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=1223, Unknown=0, NotChecked=0, Total=1332 [2022-04-05 09:16:19,982 INFO L913 BasicCegarLoop]: 100 mSDtfsCounter, 2 mSDsluCounter, 1315 mSDsCounter, 0 mSdLazyCounter, 2501 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1415 SdHoareTripleChecker+Invalid, 2501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-05 09:16:19,982 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1415 Invalid, 2501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2501 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-05 09:16:19,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-04-05 09:16:19,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2022-04-05 09:16:19,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 72 states have (on average 1.0138888888888888) internal successors, (73), 72 states have internal predecessors, (73), 32 states have call successors, (32), 6 states have call predecessors, (32), 4 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-04-05 09:16:19,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 135 transitions. [2022-04-05 09:16:19,991 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 135 transitions. Word has length 205 [2022-04-05 09:16:19,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:16:19,991 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 135 transitions. [2022-04-05 09:16:19,991 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 29 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 28 states have call predecessors, (29), 28 states have call successors, (29) [2022-04-05 09:16:19,991 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 135 transitions. [2022-04-05 09:16:19,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-04-05 09:16:19,992 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:16:19,992 INFO L499 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:16:19,998 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-04-05 09:16:20,197 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-04-05 09:16:20,197 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:16:20,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:16:20,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1053638574, now seen corresponding path program 27 times [2022-04-05 09:16:20,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:16:20,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724767073] [2022-04-05 09:16:20,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:16:20,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:16:20,204 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:16:20,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [57654145] [2022-04-05 09:16:20,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 09:16:20,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:16:20,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:16:20,205 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 09:16:20,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-04-05 09:16:24,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2022-04-05 09:16:24,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 09:16:24,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 128 conjunts are in the unsatisfiable core [2022-04-05 09:16:24,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:16:25,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2702 backedges. 210 proven. 1136 refuted. 0 times theorem prover too weak. 1356 trivial. 0 not checked. [2022-04-05 09:16:25,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:16:39,554 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_main_~y~0 1))) (or (= (+ (* .cse0 c_main_~k~0) c_main_~k~0) (+ (* 2 c_main_~y~0) 3 (* .cse0 .cse0))) (< (+ 2 c_main_~c~0) c_main_~k~0) (not (= (mod (+ (* (- 13) .cse0 .cse0) (* (- 1) .cse0 .cse0 .cse0 .cse0) (* (- 6) .cse0 .cse0 .cse0)) 4) 0)) (<= c_main_~k~0 (+ c_main_~c~0 1)))) is different from false [2022-04-05 09:16:57,242 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 3 c_main_~y~0))) (or (= (+ (* 2 c_main_~y~0) 7 (* .cse0 .cse0)) (+ (* .cse0 c_main_~k~0) c_main_~k~0)) (< (+ c_main_~c~0 4) c_main_~k~0) (<= c_main_~k~0 (+ 3 c_main_~c~0)) (not (= (mod (+ (* (- 1) .cse0 .cse0 .cse0 .cse0) (* (- 13) .cse0 .cse0) (* .cse0 .cse0 .cse0 (- 6))) 4) 0)))) is different from false [2022-04-05 09:17:05,295 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 4 c_main_~y~0))) (or (not (= (mod (+ (* (- 1) .cse0 .cse0 .cse0 .cse0) (* (- 13) .cse0 .cse0) (* .cse0 .cse0 .cse0 (- 6))) 4) 0)) (= (+ (* .cse0 c_main_~k~0) c_main_~k~0) (+ (* 2 c_main_~y~0) 9 (* .cse0 .cse0))) (<= c_main_~k~0 (+ c_main_~c~0 4)) (< (+ 5 c_main_~c~0) c_main_~k~0))) is different from false [2022-04-05 09:17:55,501 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 6 c_main_~y~0))) (or (= (+ (* 2 c_main_~y~0) (* .cse0 .cse0) 13) (+ c_main_~k~0 (* .cse0 c_main_~k~0))) (not (= (mod (+ (* (- 1) .cse0 .cse0 .cse0 .cse0) (* .cse0 .cse0 .cse0 (- 6)) (* (- 13) .cse0 .cse0)) 4) 0)) (< (+ 7 c_main_~c~0) c_main_~k~0) (<= c_main_~k~0 (+ 6 c_main_~c~0)))) is different from false [2022-04-05 09:18:03,563 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 7 c_main_~y~0))) (or (< (+ c_main_~c~0 8) c_main_~k~0) (not (= (mod (+ (* (- 13) .cse0 .cse0) (* (- 1) .cse0 .cse0 .cse0 .cse0) (* .cse0 .cse0 .cse0 (- 6))) 4) 0)) (<= c_main_~k~0 (+ 7 c_main_~c~0)) (= (+ (* 2 c_main_~y~0) 15 (* .cse0 .cse0)) (+ c_main_~k~0 (* .cse0 c_main_~k~0))))) is different from false [2022-04-05 09:18:11,634 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 8 c_main_~y~0))) (or (not (= (mod (+ (* (- 13) .cse0 .cse0) (* .cse0 .cse0 .cse0 (- 6)) (* (- 1) .cse0 .cse0 .cse0 .cse0)) 4) 0)) (< (+ 9 c_main_~c~0) c_main_~k~0) (<= c_main_~k~0 (+ c_main_~c~0 8)) (= (+ (* 2 c_main_~y~0) 17 (* .cse0 .cse0)) (+ (* .cse0 c_main_~k~0) c_main_~k~0)))) is different from false [2022-04-05 09:19:07,352 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 10 c_main_~y~0))) (or (= (+ (* 2 c_main_~y~0) 21 (* .cse0 .cse0)) (+ (* .cse0 c_main_~k~0) c_main_~k~0)) (not (= (mod (+ (* (- 13) .cse0 .cse0) (* .cse0 .cse0 .cse0 (- 6)) (* (- 1) .cse0 .cse0 .cse0 .cse0)) 4) 0)) (<= c_main_~k~0 (+ c_main_~c~0 10)) (< (+ c_main_~c~0 11) c_main_~k~0))) is different from false [2022-04-05 09:19:15,405 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 11 c_main_~y~0))) (or (<= c_main_~k~0 (+ c_main_~c~0 11)) (not (= (mod (+ (* (- 13) .cse0 .cse0) (* (- 1) .cse0 .cse0 .cse0 .cse0) (* (- 6) .cse0 .cse0 .cse0)) 4) 0)) (= (+ (* .cse0 c_main_~k~0) c_main_~k~0) (+ 23 (* 2 c_main_~y~0) (* .cse0 .cse0))) (< (+ c_main_~c~0 12) c_main_~k~0))) is different from false [2022-04-05 09:21:07,769 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 14 c_main_~y~0))) (or (= (+ (* .cse0 c_main_~k~0) c_main_~k~0) (+ (* 2 c_main_~y~0) 29 (* .cse0 .cse0))) (not (= (mod (+ (* (- 1) .cse0 .cse0 .cse0 .cse0) (* .cse0 .cse0 .cse0 (- 6)) (* .cse0 .cse0 (- 13))) 4) 0)) (< (+ c_main_~c~0 15) c_main_~k~0) (<= c_main_~k~0 (+ 14 c_main_~c~0)))) is different from false [2022-04-05 09:21:15,822 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 15 c_main_~y~0))) (or (<= c_main_~k~0 (+ c_main_~c~0 15)) (not (= (mod (+ (* (- 1) .cse0 .cse0 .cse0 .cse0) (* .cse0 .cse0 .cse0 (- 6)) (* (- 13) .cse0 .cse0)) 4) 0)) (< (+ 16 c_main_~c~0) c_main_~k~0) (= (+ (* 2 c_main_~y~0) (* .cse0 .cse0) 31) (+ (* .cse0 c_main_~k~0) c_main_~k~0)))) is different from false [2022-04-05 09:22:43,236 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 17 c_main_~y~0))) (or (= (+ (* .cse0 .cse0) (* 2 c_main_~y~0) 35) (+ (* .cse0 c_main_~k~0) c_main_~k~0)) (<= c_main_~k~0 (+ c_main_~c~0 17)) (not (= (mod (+ (* .cse0 .cse0 .cse0 (- 6)) (* (- 1) .cse0 .cse0 .cse0 .cse0) (* .cse0 .cse0 (- 13))) 4) 0)) (< (+ c_main_~c~0 18) c_main_~k~0))) is different from false [2022-04-05 09:23:38,861 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 19 c_main_~y~0))) (or (<= c_main_~k~0 (+ 19 c_main_~c~0)) (= (+ (* .cse0 c_main_~k~0) c_main_~k~0) (+ (* 2 c_main_~y~0) (* .cse0 .cse0) 39)) (not (= 0 (mod (+ (* (- 1) .cse0 .cse0 .cse0 .cse0) (* .cse0 .cse0 (- 13)) (* .cse0 .cse0 .cse0 (- 6))) 4))) (< (+ c_main_~c~0 20) c_main_~k~0))) is different from false [2022-04-05 09:23:46,916 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 20 c_main_~y~0))) (or (< (+ 21 c_main_~c~0) c_main_~k~0) (<= c_main_~k~0 (+ c_main_~c~0 20)) (= (+ (* .cse0 c_main_~k~0) c_main_~k~0) (+ (* .cse0 .cse0) 41 (* 2 c_main_~y~0))) (not (= 0 (mod (+ (* (- 1) .cse0 .cse0 .cse0 .cse0) (* (- 13) .cse0 .cse0) (* .cse0 .cse0 .cse0 (- 6))) 4))))) is different from false [2022-04-05 09:26:56,957 WARN L833 $PredicateComparison]: unable to prove that (or (not (= (mod (let ((.cse0 (+ 26 c_main_~y~0))) (+ (* (- 13) .cse0 .cse0) (* (- 1) .cse0 .cse0 .cse0 .cse0) (* (- 6) .cse0 .cse0 .cse0))) 4) 0)) (forall ((main_~k~0 Int)) (or (= (+ (* c_main_~y~0 54) 729 (* c_main_~y~0 c_main_~y~0)) (+ (* main_~k~0 27) (* main_~k~0 c_main_~y~0))) (< (+ c_main_~c~0 27) main_~k~0) (<= main_~k~0 (+ c_main_~c~0 26))))) is different from false [2022-04-05 09:27:00,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:27:00,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724767073] [2022-04-05 09:27:00,046 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:27:00,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57654145] [2022-04-05 09:27:00,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57654145] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 09:27:00,047 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 09:27:00,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2022-04-05 09:27:00,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268935590] [2022-04-05 09:27:00,047 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 09:27:00,047 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-05 09:27:00,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:27:00,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-05 09:27:00,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=549, Invalid=2444, Unknown=33, NotChecked=1666, Total=4692 [2022-04-05 09:27:00,049 INFO L87 Difference]: Start difference. First operand 109 states and 135 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 34 states have internal predecessors, (72), 30 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 29 states have call predecessors, (30), 29 states have call successors, (30) [2022-04-05 09:27:03,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:27:03,697 INFO L93 Difference]: Finished difference Result 117 states and 144 transitions. [2022-04-05 09:27:03,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-05 09:27:03,697 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 34 states have internal predecessors, (72), 30 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 29 states have call predecessors, (30), 29 states have call successors, (30) Word has length 212 [2022-04-05 09:27:03,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:27:03,698 INFO L225 Difference]: With dead ends: 117 [2022-04-05 09:27:03,698 INFO L226 Difference]: Without dead ends: 112 [2022-04-05 09:27:03,699 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 338 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 14 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 475.0s TimeCoverageRelationStatistics Valid=570, Invalid=2758, Unknown=34, NotChecked=1750, Total=5112 [2022-04-05 09:27:03,700 INFO L913 BasicCegarLoop]: 72 mSDtfsCounter, 8 mSDsluCounter, 1297 mSDsCounter, 0 mSdLazyCounter, 3060 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1369 SdHoareTripleChecker+Invalid, 3062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-05 09:27:03,700 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 1369 Invalid, 3062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3060 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-05 09:27:03,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-04-05 09:27:03,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2022-04-05 09:27:03,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 74 states have (on average 1.0135135135135136) internal successors, (75), 74 states have internal predecessors, (75), 33 states have call successors, (33), 6 states have call predecessors, (33), 4 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-04-05 09:27:03,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 139 transitions. [2022-04-05 09:27:03,709 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 139 transitions. Word has length 212 [2022-04-05 09:27:03,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:27:03,709 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 139 transitions. [2022-04-05 09:27:03,709 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 34 states have internal predecessors, (72), 30 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 29 states have call predecessors, (30), 29 states have call successors, (30) [2022-04-05 09:27:03,710 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 139 transitions. [2022-04-05 09:27:03,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-04-05 09:27:03,710 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:27:03,710 INFO L499 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:27:03,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-04-05 09:27:03,919 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:27:03,919 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:27:03,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:27:03,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1817647808, now seen corresponding path program 28 times [2022-04-05 09:27:03,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:27:03,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84473475] [2022-04-05 09:27:03,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:27:03,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:27:03,926 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:27:03,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1360971951] [2022-04-05 09:27:03,926 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 09:27:03,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:27:03,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:27:03,927 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 09:27:03,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-04-05 09:27:04,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 09:27:04,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 09:27:04,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 120 conjunts are in the unsatisfiable core [2022-04-05 09:27:04,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:27:05,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2900 backedges. 58 proven. 1218 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2022-04-05 09:27:05,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:27:05,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:27:05,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84473475] [2022-04-05 09:27:05,737 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:27:05,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360971951] [2022-04-05 09:27:05,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360971951] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 09:27:05,737 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 09:27:05,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2022-04-05 09:27:05,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692464534] [2022-04-05 09:27:05,737 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 09:27:05,738 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-05 09:27:05,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:27:05,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-05 09:27:05,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2022-04-05 09:27:05,738 INFO L87 Difference]: Start difference. First operand 112 states and 139 transitions. Second operand has 34 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 33 states have internal predecessors, (71), 31 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (31), 30 states have call predecessors, (31), 30 states have call successors, (31) [2022-04-05 09:27:07,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:27:07,154 INFO L93 Difference]: Finished difference Result 120 states and 148 transitions. [2022-04-05 09:27:07,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-05 09:27:07,154 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 33 states have internal predecessors, (71), 31 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (31), 30 states have call predecessors, (31), 30 states have call successors, (31) Word has length 219 [2022-04-05 09:27:07,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:27:07,155 INFO L225 Difference]: With dead ends: 120 [2022-04-05 09:27:07,155 INFO L226 Difference]: Without dead ends: 115 [2022-04-05 09:27:07,155 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 195 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=115, Invalid=1367, Unknown=0, NotChecked=0, Total=1482 [2022-04-05 09:27:07,155 INFO L913 BasicCegarLoop]: 106 mSDtfsCounter, 2 mSDsluCounter, 1467 mSDsCounter, 0 mSdLazyCounter, 2859 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1573 SdHoareTripleChecker+Invalid, 2859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-05 09:27:07,156 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1573 Invalid, 2859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2859 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-05 09:27:07,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-04-05 09:27:07,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2022-04-05 09:27:07,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 76 states have (on average 1.013157894736842) internal successors, (77), 76 states have internal predecessors, (77), 34 states have call successors, (34), 6 states have call predecessors, (34), 4 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-04-05 09:27:07,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 143 transitions. [2022-04-05 09:27:07,165 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 143 transitions. Word has length 219 [2022-04-05 09:27:07,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:27:07,165 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 143 transitions. [2022-04-05 09:27:07,165 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 33 states have internal predecessors, (71), 31 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (31), 30 states have call predecessors, (31), 30 states have call successors, (31) [2022-04-05 09:27:07,166 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 143 transitions. [2022-04-05 09:27:07,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-04-05 09:27:07,166 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:27:07,167 INFO L499 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:27:07,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-04-05 09:27:07,372 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-04-05 09:27:07,373 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:27:07,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:27:07,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1847195794, now seen corresponding path program 29 times [2022-04-05 09:27:07,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:27:07,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082711400] [2022-04-05 09:27:07,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:27:07,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:27:07,380 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:27:07,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1246237303] [2022-04-05 09:27:07,381 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 09:27:07,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:27:07,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:27:07,412 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 09:27:07,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process