/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_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 22:49:43,275 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 22:49:43,276 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 22:49:43,332 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 22:49:43,332 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 22:49:43,333 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 22:49:43,335 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 22:49:43,336 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 22:49:43,337 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 22:49:43,337 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 22:49:43,338 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 22:49:43,338 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 22:49:43,339 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 22:49:43,339 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 22:49:43,340 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 22:49:43,340 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 22:49:43,341 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 22:49:43,341 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 22:49:43,342 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 22:49:43,343 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 22:49:43,344 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 22:49:43,349 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 22:49:43,349 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 22:49:43,350 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 22:49:43,350 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 22:49:43,352 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 22:49:43,357 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 22:49:43,357 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 22:49:43,361 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 22:49:43,361 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-17 22:49:43,375 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 22:49:43,376 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 22:49:43,376 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-17 22:49:43,376 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-17 22:49:43,377 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-17 22:49:43,377 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-17 22:49:43,377 INFO L138 SettingsManager]: * Use SBE=true [2022-03-17 22:49:43,377 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 22:49:43,377 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 22:49:43,377 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 22:49:43,377 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 22:49:43,377 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 22:49:43,377 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 22:49:43,377 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 22:49:43,378 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 22:49:43,378 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 22:49:43,378 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 22:49:43,378 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 22:49:43,378 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 22:49:43,378 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 22:49:43,378 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 22:49:43,378 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-17 22:49:43,378 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-17 22:49:43,378 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 22:49:43,379 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-17 22:49:43,379 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-17 22:49:43,379 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-17 22:49:43,379 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-17 22:49:43,379 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 22:49:43,379 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 22:49:43,538 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 22:49:43,554 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 22:49:43,555 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 22:49:43,556 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 22:49:43,557 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 22:49:43,558 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound100.c [2022-03-17 22:49:43,602 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cec8a282/fc0eb859f5d44f61b7b0210d0373f5b9/FLAG9e2c93784 [2022-03-17 22:49:43,907 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 22:49:43,907 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound100.c [2022-03-17 22:49:43,913 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cec8a282/fc0eb859f5d44f61b7b0210d0373f5b9/FLAG9e2c93784 [2022-03-17 22:49:44,331 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cec8a282/fc0eb859f5d44f61b7b0210d0373f5b9 [2022-03-17 22:49:44,333 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 22:49:44,334 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 22:49:44,336 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 22:49:44,336 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 22:49:44,350 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 22:49:44,350 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 10:49:44" (1/1) ... [2022-03-17 22:49:44,351 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cfaaf68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:49:44, skipping insertion in model container [2022-03-17 22:49:44,351 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 10:49:44" (1/1) ... [2022-03-17 22:49:44,358 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 22:49:44,367 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 22:49:44,499 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_valuebound100.c[458,471] [2022-03-17 22:49:44,515 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 22:49:44,521 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 22:49:44,531 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_valuebound100.c[458,471] [2022-03-17 22:49:44,547 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 22:49:44,556 INFO L208 MainTranslator]: Completed translation [2022-03-17 22:49:44,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:49:44 WrapperNode [2022-03-17 22:49:44,556 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 22:49:44,560 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 22:49:44,560 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 22:49:44,560 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 22:49:44,568 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:49:44" (1/1) ... [2022-03-17 22:49:44,569 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:49:44" (1/1) ... [2022-03-17 22:49:44,574 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:49:44" (1/1) ... [2022-03-17 22:49:44,574 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:49:44" (1/1) ... [2022-03-17 22:49:44,582 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:49:44" (1/1) ... [2022-03-17 22:49:44,585 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:49:44" (1/1) ... [2022-03-17 22:49:44,586 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:49:44" (1/1) ... [2022-03-17 22:49:44,589 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 22:49:44,590 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 22:49:44,590 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 22:49:44,591 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 22:49:44,591 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:49:44" (1/1) ... [2022-03-17 22:49:44,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 22:49:44,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:49:44,613 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) [2022-03-17 22:49:44,632 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 [2022-03-17 22:49:44,642 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 22:49:44,642 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 22:49:44,642 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 22:49:44,642 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 22:49:44,643 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 22:49:44,643 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 22:49:44,643 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 22:49:44,643 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 22:49:44,645 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 22:49:44,645 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 22:49:44,645 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2022-03-17 22:49:44,645 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 22:49:44,645 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 22:49:44,645 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 22:49:44,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 22:49:44,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 22:49:44,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 22:49:44,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 22:49:44,646 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 22:49:44,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 22:49:44,692 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 22:49:44,693 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 22:49:44,824 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 22:49:44,831 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 22:49:44,832 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-17 22:49:44,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 10:49:44 BoogieIcfgContainer [2022-03-17 22:49:44,834 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 22:49:44,834 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 22:49:44,834 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 22:49:44,852 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 22:49:44,854 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 10:49:44" (1/1) ... [2022-03-17 22:49:44,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 10:49:44 BasicIcfg [2022-03-17 22:49:44,865 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 22:49:44,867 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 22:49:44,867 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 22:49:44,881 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 22:49:44,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 10:49:44" (1/4) ... [2022-03-17 22:49:44,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dda74da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 10:49:44, skipping insertion in model container [2022-03-17 22:49:44,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:49:44" (2/4) ... [2022-03-17 22:49:44,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dda74da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 10:49:44, skipping insertion in model container [2022-03-17 22:49:44,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 10:49:44" (3/4) ... [2022-03-17 22:49:44,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dda74da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 10:49:44, skipping insertion in model container [2022-03-17 22:49:44,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 10:49:44" (4/4) ... [2022-03-17 22:49:44,883 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_valuebound100.cqvasr [2022-03-17 22:49:44,887 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-17 22:49:44,887 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 22:49:44,929 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 22:49:44,934 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 [2022-03-17 22:49:44,934 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 22:49:44,955 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) [2022-03-17 22:49:44,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-17 22:49:44,958 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:49:44,959 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 22:49:44,959 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:49:44,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:49:44,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1885409022, now seen corresponding path program 1 times [2022-03-17 22:49:44,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:49:44,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410513893] [2022-03-17 22:49:44,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:49:44,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:49:45,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 22:49:45,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 22:49:45,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 22:49:45,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 22:49:45,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 22:49:45,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 22:49:45,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:49:45,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410513893] [2022-03-17 22:49:45,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410513893] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 22:49:45,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 22:49:45,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 22:49:45,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150706782] [2022-03-17 22:49:45,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 22:49:45,138 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 22:49:45,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:49:45,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 22:49:45,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 22:49:45,163 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) [2022-03-17 22:49:45,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:49:45,217 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2022-03-17 22:49:45,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 22:49:45,220 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 [2022-03-17 22:49:45,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:49:45,225 INFO L225 Difference]: With dead ends: 47 [2022-03-17 22:49:45,225 INFO L226 Difference]: Without dead ends: 23 [2022-03-17 22:49:45,227 INFO L911 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 [2022-03-17 22:49:45,230 INFO L912 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 [2022-03-17 22:49:45,231 INFO L913 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] [2022-03-17 22:49:45,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-17 22:49:45,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-03-17 22:49:45,252 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) [2022-03-17 22:49:45,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2022-03-17 22:49:45,253 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 17 [2022-03-17 22:49:45,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:49:45,254 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2022-03-17 22:49:45,254 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) [2022-03-17 22:49:45,254 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2022-03-17 22:49:45,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-17 22:49:45,255 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:49:45,255 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 22:49:45,255 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 22:49:45,256 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:49:45,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:49:45,256 INFO L85 PathProgramCache]: Analyzing trace with hash 603980644, now seen corresponding path program 1 times [2022-03-17 22:49:45,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:49:45,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953328804] [2022-03-17 22:49:45,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:49:45,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:49:45,281 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:49:45,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [863402230] [2022-03-17 22:49:45,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:49:45,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:49:45,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:49:45,288 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) [2022-03-17 22:49:45,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 22:49:45,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 22:49:45,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 22:49:45,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:49:45,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 22:49:45,409 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 22:49:45,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:49:45,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953328804] [2022-03-17 22:49:45,409 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:49:45,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863402230] [2022-03-17 22:49:45,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863402230] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 22:49:45,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 22:49:45,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 22:49:45,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416188208] [2022-03-17 22:49:45,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 22:49:45,411 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 22:49:45,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:49:45,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 22:49:45,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 22:49:45,412 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) [2022-03-17 22:49:45,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:49:45,443 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-03-17 22:49:45,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 22:49:45,443 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 [2022-03-17 22:49:45,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:49:45,444 INFO L225 Difference]: With dead ends: 34 [2022-03-17 22:49:45,444 INFO L226 Difference]: Without dead ends: 30 [2022-03-17 22:49:45,444 INFO L911 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 [2022-03-17 22:49:45,445 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 22:49:45,446 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 83 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 22:49:45,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-17 22:49:45,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-03-17 22:49:45,451 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) [2022-03-17 22:49:45,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-03-17 22:49:45,451 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 17 [2022-03-17 22:49:45,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:49:45,452 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-03-17 22:49:45,452 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) [2022-03-17 22:49:45,452 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-03-17 22:49:45,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-17 22:49:45,452 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:49:45,453 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 22:49:45,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-17 22:49:45,668 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 [2022-03-17 22:49:45,668 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:49:45,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:49:45,669 INFO L85 PathProgramCache]: Analyzing trace with hash -169450186, now seen corresponding path program 1 times [2022-03-17 22:49:45,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:49:45,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013332611] [2022-03-17 22:49:45,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:49:45,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:49:45,677 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:49:45,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [628243188] [2022-03-17 22:49:45,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:49:45,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:49:45,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:49:45,680 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) [2022-03-17 22:49:45,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 22:49:45,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 22:49:45,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-17 22:49:45,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:49:45,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 22:49:45,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 22:49:46,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-17 22:49:46,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:49:46,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013332611] [2022-03-17 22:49:46,206 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:49:46,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628243188] [2022-03-17 22:49:46,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628243188] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 22:49:46,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 22:49:46,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-03-17 22:49:46,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828737956] [2022-03-17 22:49:46,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 22:49:46,207 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 22:49:46,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:49:46,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 22:49:46,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-17 22:49:46,207 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) [2022-03-17 22:49:46,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:49:46,236 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2022-03-17 22:49:46,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 22:49:46,236 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 [2022-03-17 22:49:46,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:49:46,237 INFO L225 Difference]: With dead ends: 36 [2022-03-17 22:49:46,237 INFO L226 Difference]: Without dead ends: 31 [2022-03-17 22:49:46,237 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-17 22:49:46,238 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 22:49:46,238 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 76 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 22:49:46,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-17 22:49:46,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-03-17 22:49:46,244 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) [2022-03-17 22:49:46,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2022-03-17 22:49:46,247 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 24 [2022-03-17 22:49:46,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:49:46,248 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2022-03-17 22:49:46,248 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) [2022-03-17 22:49:46,248 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2022-03-17 22:49:46,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-17 22:49:46,248 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:49:46,249 INFO L500 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] [2022-03-17 22:49:46,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 22:49:46,459 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 [2022-03-17 22:49:46,460 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:49:46,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:49:46,460 INFO L85 PathProgramCache]: Analyzing trace with hash -434891502, now seen corresponding path program 1 times [2022-03-17 22:49:46,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:49:46,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425524122] [2022-03-17 22:49:46,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:49:46,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:49:46,472 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:49:46,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [267218677] [2022-03-17 22:49:46,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:49:46,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:49:46,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:49:46,476 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) [2022-03-17 22:49:46,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 22:49:46,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 22:49:46,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-17 22:49:46,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:49:46,659 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 22:49:46,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 22:49:46,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:49:46,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425524122] [2022-03-17 22:49:46,846 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:49:46,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267218677] [2022-03-17 22:49:46,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267218677] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 22:49:46,847 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 22:49:46,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-03-17 22:49:46,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005715850] [2022-03-17 22:49:46,848 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 22:49:46,848 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-17 22:49:46,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:49:46,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-17 22:49:46,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-17 22:49:46,850 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) [2022-03-17 22:49:46,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:49:46,914 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2022-03-17 22:49:46,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-17 22:49:46,915 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 [2022-03-17 22:49:46,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:49:46,915 INFO L225 Difference]: With dead ends: 39 [2022-03-17 22:49:46,916 INFO L226 Difference]: Without dead ends: 34 [2022-03-17 22:49:46,916 INFO L911 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 [2022-03-17 22:49:46,920 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 22:49:46,923 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 129 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 22:49:46,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-17 22:49:46,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-03-17 22:49:46,947 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) [2022-03-17 22:49:46,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2022-03-17 22:49:46,952 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 30 [2022-03-17 22:49:46,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:49:46,952 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2022-03-17 22:49:46,952 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) [2022-03-17 22:49:46,952 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2022-03-17 22:49:46,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-17 22:49:46,953 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:49:46,953 INFO L500 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] [2022-03-17 22:49:46,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-17 22:49:47,153 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 [2022-03-17 22:49:47,154 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:49:47,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:49:47,154 INFO L85 PathProgramCache]: Analyzing trace with hash 725792896, now seen corresponding path program 2 times [2022-03-17 22:49:47,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:49:47,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331188439] [2022-03-17 22:49:47,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:49:47,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:49:47,163 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:49:47,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1445001273] [2022-03-17 22:49:47,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 22:49:47,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:49:47,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:49:47,171 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) [2022-03-17 22:49:47,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-17 22:49:47,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 22:49:47,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 22:49:47,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-17 22:49:47,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:49:47,376 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 22:49:47,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 22:49:47,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:49:47,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331188439] [2022-03-17 22:49:47,496 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:49:47,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445001273] [2022-03-17 22:49:47,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445001273] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 22:49:47,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 22:49:47,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-03-17 22:49:47,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048866695] [2022-03-17 22:49:47,497 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 22:49:47,498 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-17 22:49:47,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:49:47,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-17 22:49:47,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-17 22:49:47,499 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) [2022-03-17 22:49:47,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:49:47,553 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2022-03-17 22:49:47,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-17 22:49:47,554 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 [2022-03-17 22:49:47,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:49:47,556 INFO L225 Difference]: With dead ends: 42 [2022-03-17 22:49:47,556 INFO L226 Difference]: Without dead ends: 37 [2022-03-17 22:49:47,556 INFO L911 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 [2022-03-17 22:49:47,556 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 22:49:47,557 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 165 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 22:49:47,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-17 22:49:47,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-03-17 22:49:47,565 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) [2022-03-17 22:49:47,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2022-03-17 22:49:47,566 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 37 [2022-03-17 22:49:47,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:49:47,566 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2022-03-17 22:49:47,566 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) [2022-03-17 22:49:47,567 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2022-03-17 22:49:47,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-17 22:49:47,568 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:49:47,568 INFO L500 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] [2022-03-17 22:49:47,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-17 22:49:47,783 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 [2022-03-17 22:49:47,783 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:49:47,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:49:47,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1487404370, now seen corresponding path program 3 times [2022-03-17 22:49:47,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:49:47,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284791564] [2022-03-17 22:49:47,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:49:47,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:49:47,791 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:49:47,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [13534311] [2022-03-17 22:49:47,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 22:49:47,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:49:47,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:49:47,808 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) [2022-03-17 22:49:47,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-17 22:49:47,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-17 22:49:47,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 22:49:47,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-17 22:49:47,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:49:48,064 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 22:49:48,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 22:49:48,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:49:48,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284791564] [2022-03-17 22:49:48,163 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:49:48,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13534311] [2022-03-17 22:49:48,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13534311] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 22:49:48,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 22:49:48,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-03-17 22:49:48,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032576913] [2022-03-17 22:49:48,164 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 22:49:48,164 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-17 22:49:48,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:49:48,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-17 22:49:48,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-17 22:49:48,165 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) [2022-03-17 22:49:48,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:49:48,237 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2022-03-17 22:49:48,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-17 22:49:48,238 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 [2022-03-17 22:49:48,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:49:48,241 INFO L225 Difference]: With dead ends: 45 [2022-03-17 22:49:48,241 INFO L226 Difference]: Without dead ends: 40 [2022-03-17 22:49:48,241 INFO L911 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 [2022-03-17 22:49:48,242 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 205 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 [2022-03-17 22:49:48,243 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 205 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 22:49:48,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-17 22:49:48,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-03-17 22:49:48,248 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) [2022-03-17 22:49:48,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2022-03-17 22:49:48,249 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 44 [2022-03-17 22:49:48,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:49:48,249 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2022-03-17 22:49:48,249 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) [2022-03-17 22:49:48,249 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2022-03-17 22:49:48,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-17 22:49:48,250 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:49:48,250 INFO L500 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] [2022-03-17 22:49:48,256 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-17 22:49:48,456 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 [2022-03-17 22:49:48,456 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:49:48,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:49:48,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1178929216, now seen corresponding path program 4 times [2022-03-17 22:49:48,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:49:48,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197632065] [2022-03-17 22:49:48,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:49:48,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:49:48,475 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:49:48,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1566845926] [2022-03-17 22:49:48,475 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-17 22:49:48,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:49:48,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:49:48,477 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) [2022-03-17 22:49:48,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-17 22:49:48,700 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-17 22:49:48,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 22:49:48,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-17 22:49:48,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:49:48,873 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-17 22:49:48,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 22:49:49,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:49:49,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197632065] [2022-03-17 22:49:49,049 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:49:49,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566845926] [2022-03-17 22:49:49,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566845926] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 22:49:49,049 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 22:49:49,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-17 22:49:49,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577853164] [2022-03-17 22:49:49,049 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 22:49:49,049 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-17 22:49:49,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:49:49,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-17 22:49:49,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-17 22:49:49,050 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) [2022-03-17 22:49:49,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:49:49,137 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2022-03-17 22:49:49,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-17 22:49:49,137 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 [2022-03-17 22:49:49,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:49:49,138 INFO L225 Difference]: With dead ends: 48 [2022-03-17 22:49:49,138 INFO L226 Difference]: Without dead ends: 43 [2022-03-17 22:49:49,138 INFO L911 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 [2022-03-17 22:49:49,139 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 2 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 22:49:49,139 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 249 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 22:49:49,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-17 22:49:49,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-03-17 22:49:49,143 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) [2022-03-17 22:49:49,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2022-03-17 22:49:49,144 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 51 [2022-03-17 22:49:49,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:49:49,144 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2022-03-17 22:49:49,144 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) [2022-03-17 22:49:49,144 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2022-03-17 22:49:49,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-17 22:49:49,145 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:49:49,145 INFO L500 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] [2022-03-17 22:49:49,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-17 22:49:49,359 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 [2022-03-17 22:49:49,360 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:49:49,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:49:49,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1658817134, now seen corresponding path program 5 times [2022-03-17 22:49:49,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:49:49,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3308470] [2022-03-17 22:49:49,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:49:49,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:49:49,366 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:49:49,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [365195704] [2022-03-17 22:49:49,367 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-17 22:49:49,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:49:49,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:49:49,377 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) [2022-03-17 22:49:49,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-17 22:49:49,506 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-17 22:49:49,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 22:49:49,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-17 22:49:49,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:49:49,687 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-17 22:49:49,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 22:49:49,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:49:49,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3308470] [2022-03-17 22:49:49,795 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:49:49,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365195704] [2022-03-17 22:49:49,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365195704] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 22:49:49,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 22:49:49,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-17 22:49:49,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644631714] [2022-03-17 22:49:49,796 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 22:49:49,796 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-17 22:49:49,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:49:49,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-17 22:49:49,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-17 22:49:49,797 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) [2022-03-17 22:49:49,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:49:49,903 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2022-03-17 22:49:49,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-17 22:49:49,903 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 [2022-03-17 22:49:49,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:49:49,903 INFO L225 Difference]: With dead ends: 51 [2022-03-17 22:49:49,904 INFO L226 Difference]: Without dead ends: 46 [2022-03-17 22:49:49,904 INFO L911 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 [2022-03-17 22:49:49,904 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 2 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 22:49:49,905 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 297 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 22:49:49,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-17 22:49:49,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-03-17 22:49:49,909 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) [2022-03-17 22:49:49,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2022-03-17 22:49:49,909 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 58 [2022-03-17 22:49:49,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:49:49,910 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2022-03-17 22:49:49,910 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) [2022-03-17 22:49:49,910 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2022-03-17 22:49:49,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-17 22:49:49,911 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:49:49,911 INFO L500 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] [2022-03-17 22:49:49,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-17 22:49:50,111 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 [2022-03-17 22:49:50,111 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:49:50,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:49:50,112 INFO L85 PathProgramCache]: Analyzing trace with hash 270583808, now seen corresponding path program 6 times [2022-03-17 22:49:50,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:49:50,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066386057] [2022-03-17 22:49:50,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:49:50,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:49:50,118 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:49:50,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1272371226] [2022-03-17 22:49:50,119 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-17 22:49:50,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:49:50,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:49:50,120 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) [2022-03-17 22:49:50,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-17 22:49:50,275 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-17 22:49:50,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 22:49:50,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-17 22:49:50,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:49:50,482 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 14 proven. 63 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-17 22:49:50,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 22:49:50,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:49:50,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066386057] [2022-03-17 22:49:50,585 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:49:50,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272371226] [2022-03-17 22:49:50,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272371226] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 22:49:50,585 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 22:49:50,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-03-17 22:49:50,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827062994] [2022-03-17 22:49:50,586 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 22:49:50,586 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-17 22:49:50,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:49:50,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-17 22:49:50,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-17 22:49:50,587 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) [2022-03-17 22:49:50,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:49:50,700 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2022-03-17 22:49:50,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-17 22:49:50,701 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 [2022-03-17 22:49:50,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:49:50,701 INFO L225 Difference]: With dead ends: 54 [2022-03-17 22:49:50,701 INFO L226 Difference]: Without dead ends: 49 [2022-03-17 22:49:50,702 INFO L911 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 [2022-03-17 22:49:50,702 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 2 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 22:49:50,702 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 349 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 22:49:50,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-03-17 22:49:50,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-03-17 22:49:50,707 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) [2022-03-17 22:49:50,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2022-03-17 22:49:50,707 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 65 [2022-03-17 22:49:50,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:49:50,707 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2022-03-17 22:49:50,707 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) [2022-03-17 22:49:50,708 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2022-03-17 22:49:50,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-17 22:49:50,708 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:49:50,708 INFO L500 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] [2022-03-17 22:49:50,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-17 22:49:50,913 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 [2022-03-17 22:49:50,914 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:49:50,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:49:50,914 INFO L85 PathProgramCache]: Analyzing trace with hash 4292050, now seen corresponding path program 7 times [2022-03-17 22:49:50,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:49:50,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768002572] [2022-03-17 22:49:50,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:49:50,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:49:50,921 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:49:50,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [11635370] [2022-03-17 22:49:50,921 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-17 22:49:50,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:49:50,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:49:50,922 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) [2022-03-17 22:49:50,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-17 22:49:51,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 22:49:51,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-17 22:49:51,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:49:51,508 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 16 proven. 84 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-17 22:49:51,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 22:49:51,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:49:51,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768002572] [2022-03-17 22:49:51,635 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:49:51,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11635370] [2022-03-17 22:49:51,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11635370] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 22:49:51,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 22:49:51,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-03-17 22:49:51,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714603463] [2022-03-17 22:49:51,635 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 22:49:51,636 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-17 22:49:51,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:49:51,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-17 22:49:51,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-03-17 22:49:51,636 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) [2022-03-17 22:49:51,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:49:51,769 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2022-03-17 22:49:51,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-17 22:49:51,770 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 [2022-03-17 22:49:51,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:49:51,770 INFO L225 Difference]: With dead ends: 57 [2022-03-17 22:49:51,770 INFO L226 Difference]: Without dead ends: 52 [2022-03-17 22:49:51,771 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-03-17 22:49:51,771 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 2 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 22:49:51,771 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 405 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 22:49:51,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-17 22:49:51,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-03-17 22:49:51,776 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) [2022-03-17 22:49:51,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2022-03-17 22:49:51,776 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 72 [2022-03-17 22:49:51,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:49:51,777 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2022-03-17 22:49:51,777 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) [2022-03-17 22:49:51,777 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2022-03-17 22:49:51,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-17 22:49:51,777 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:49:51,777 INFO L500 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] [2022-03-17 22:49:51,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-17 22:49:51,982 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 [2022-03-17 22:49:51,983 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:49:51,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:49:51,983 INFO L85 PathProgramCache]: Analyzing trace with hash 395442112, now seen corresponding path program 8 times [2022-03-17 22:49:51,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:49:51,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376407557] [2022-03-17 22:49:51,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:49:51,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:49:51,989 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:49:51,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [123344658] [2022-03-17 22:49:51,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 22:49:51,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:49:51,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:49:51,995 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) [2022-03-17 22:49:51,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-17 22:49:52,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 22:49:52,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 22:49:52,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-17 22:49:52,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:49:52,841 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 18 proven. 108 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-17 22:49:52,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 22:49:52,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:49:52,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376407557] [2022-03-17 22:49:52,982 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:49:52,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123344658] [2022-03-17 22:49:52,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123344658] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 22:49:52,982 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 22:49:52,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-03-17 22:49:52,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129862503] [2022-03-17 22:49:52,982 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 22:49:52,983 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-17 22:49:52,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:49:52,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-17 22:49:52,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-03-17 22:49:52,983 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) [2022-03-17 22:49:53,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:49:53,173 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2022-03-17 22:49:53,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-17 22:49:53,173 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 [2022-03-17 22:49:53,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:49:53,174 INFO L225 Difference]: With dead ends: 60 [2022-03-17 22:49:53,174 INFO L226 Difference]: Without dead ends: 55 [2022-03-17 22:49:53,174 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-03-17 22:49:53,175 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 2 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 22:49:53,175 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 465 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 22:49:53,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-17 22:49:53,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-03-17 22:49:53,184 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) [2022-03-17 22:49:53,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2022-03-17 22:49:53,185 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 79 [2022-03-17 22:49:53,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:49:53,186 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2022-03-17 22:49:53,186 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) [2022-03-17 22:49:53,186 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2022-03-17 22:49:53,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-17 22:49:53,192 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:49:53,192 INFO L500 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] [2022-03-17 22:49:53,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-17 22:49:53,396 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 [2022-03-17 22:49:53,397 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:49:53,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:49:53,397 INFO L85 PathProgramCache]: Analyzing trace with hash 667883026, now seen corresponding path program 9 times [2022-03-17 22:49:53,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:49:53,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411240514] [2022-03-17 22:49:53,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:49:53,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:49:53,411 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:49:53,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [775195890] [2022-03-17 22:49:53,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 22:49:53,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:49:53,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:49:53,413 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) [2022-03-17 22:49:53,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-17 22:49:53,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-03-17 22:49:53,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 22:49:53,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-17 22:49:53,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:49:54,048 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 20 proven. 135 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-03-17 22:49:54,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 22:49:54,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:49:54,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411240514] [2022-03-17 22:49:54,287 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:49:54,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775195890] [2022-03-17 22:49:54,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775195890] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 22:49:54,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 22:49:54,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-03-17 22:49:54,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512558211] [2022-03-17 22:49:54,287 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 22:49:54,288 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-17 22:49:54,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:49:54,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-17 22:49:54,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-03-17 22:49:54,289 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) [2022-03-17 22:49:54,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:49:54,485 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2022-03-17 22:49:54,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-17 22:49:54,486 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 [2022-03-17 22:49:54,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:49:54,486 INFO L225 Difference]: With dead ends: 63 [2022-03-17 22:49:54,486 INFO L226 Difference]: Without dead ends: 58 [2022-03-17 22:49:54,487 INFO L911 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 [2022-03-17 22:49:54,487 INFO L912 BasicCegarLoop]: 49 mSDtfsCounter, 2 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 22:49:54,487 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 529 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 22:49:54,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-03-17 22:49:54,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-03-17 22:49:54,492 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) [2022-03-17 22:49:54,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2022-03-17 22:49:54,492 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 86 [2022-03-17 22:49:54,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:49:54,492 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2022-03-17 22:49:54,493 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) [2022-03-17 22:49:54,493 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2022-03-17 22:49:54,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-17 22:49:54,493 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:49:54,493 INFO L500 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] [2022-03-17 22:49:54,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-17 22:49:54,698 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 [2022-03-17 22:49:54,698 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:49:54,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:49:54,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1918146432, now seen corresponding path program 10 times [2022-03-17 22:49:54,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:49:54,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468848164] [2022-03-17 22:49:54,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:49:54,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:49:54,706 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:49:54,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [862427457] [2022-03-17 22:49:54,707 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-17 22:49:54,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:49:54,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:49:54,708 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) [2022-03-17 22:49:54,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-17 22:49:55,221 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-17 22:49:55,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 22:49:55,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-17 22:49:55,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:49:55,497 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 22 proven. 165 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-17 22:49:55,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 22:49:55,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:49:55,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468848164] [2022-03-17 22:49:55,651 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:49:55,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862427457] [2022-03-17 22:49:55,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862427457] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 22:49:55,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 22:49:55,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-17 22:49:55,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332246988] [2022-03-17 22:49:55,651 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 22:49:55,652 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-17 22:49:55,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:49:55,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-17 22:49:55,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-03-17 22:49:55,652 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) [2022-03-17 22:49:55,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:49:55,857 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2022-03-17 22:49:55,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-17 22:49:55,858 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 [2022-03-17 22:49:55,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:49:55,858 INFO L225 Difference]: With dead ends: 66 [2022-03-17 22:49:55,858 INFO L226 Difference]: Without dead ends: 61 [2022-03-17 22:49:55,859 INFO L911 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 [2022-03-17 22:49:55,859 INFO L912 BasicCegarLoop]: 52 mSDtfsCounter, 2 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 22:49:55,859 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 597 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 22:49:55,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-03-17 22:49:55,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-03-17 22:49:55,864 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) [2022-03-17 22:49:55,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2022-03-17 22:49:55,864 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 93 [2022-03-17 22:49:55,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:49:55,864 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2022-03-17 22:49:55,864 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) [2022-03-17 22:49:55,864 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2022-03-17 22:49:55,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-03-17 22:49:55,865 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:49:55,865 INFO L500 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] [2022-03-17 22:49:55,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-17 22:49:56,070 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 [2022-03-17 22:49:56,071 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:49:56,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:49:56,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1384988242, now seen corresponding path program 11 times [2022-03-17 22:49:56,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:49:56,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638030849] [2022-03-17 22:49:56,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:49:56,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:49:56,078 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:49:56,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1814018760] [2022-03-17 22:49:56,078 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-17 22:49:56,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:49:56,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:49:56,079 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) [2022-03-17 22:49:56,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-17 22:49:56,669 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-03-17 22:49:56,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 22:49:56,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-17 22:49:56,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:49:57,099 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 24 proven. 198 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-17 22:49:57,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 22:49:57,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:49:57,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638030849] [2022-03-17 22:49:57,951 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:49:57,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814018760] [2022-03-17 22:49:57,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814018760] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 22:49:57,951 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 22:49:57,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-03-17 22:49:57,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332415855] [2022-03-17 22:49:57,952 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 22:49:57,952 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-17 22:49:57,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:49:57,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-17 22:49:57,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=685, Unknown=0, NotChecked=0, Total=870 [2022-03-17 22:49:57,953 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) [2022-03-17 22:49:58,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:49:58,202 INFO L93 Difference]: Finished difference Result 69 states and 80 transitions. [2022-03-17 22:49:58,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-17 22:49:58,203 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 [2022-03-17 22:49:58,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:49:58,203 INFO L225 Difference]: With dead ends: 69 [2022-03-17 22:49:58,203 INFO L226 Difference]: Without dead ends: 64 [2022-03-17 22:49:58,204 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 153 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=195, Invalid=797, Unknown=0, NotChecked=0, Total=992 [2022-03-17 22:49:58,204 INFO L912 BasicCegarLoop]: 55 mSDtfsCounter, 2 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 22:49:58,204 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 669 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 22:49:58,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-17 22:49:58,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-03-17 22:49:58,209 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) [2022-03-17 22:49:58,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2022-03-17 22:49:58,210 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 100 [2022-03-17 22:49:58,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:49:58,210 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2022-03-17 22:49:58,210 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) [2022-03-17 22:49:58,210 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2022-03-17 22:49:58,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-17 22:49:58,211 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:49:58,211 INFO L500 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] [2022-03-17 22:49:58,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-17 22:49:58,416 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 [2022-03-17 22:49:58,416 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:49:58,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:49:58,416 INFO L85 PathProgramCache]: Analyzing trace with hash 2099554112, now seen corresponding path program 12 times [2022-03-17 22:49:58,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:49:58,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884870983] [2022-03-17 22:49:58,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:49:58,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:49:58,422 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:49:58,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [428014668] [2022-03-17 22:49:58,423 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-17 22:49:58,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:49:58,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:49:58,424 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) [2022-03-17 22:49:58,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-17 22:49:58,647 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-03-17 22:49:58,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 22:49:58,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-17 22:49:58,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:49:59,142 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 90 proven. 236 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-03-17 22:49:59,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 22:50:03,319 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (* 6 c_main_~y~0 c_main_~y~0 c_main_~y~0)) (.cse2 (* 13 c_main_~y~0 c_main_~y~0)) (.cse3 (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0))) (or (let ((.cse0 (+ c_main_~y~0 1))) (= (* .cse0 c_main_~k~0) (* .cse0 .cse0))) (not (<= (+ (* c_main_~y~0 c_main_~y~0 c_main_~y~0) c_main_~x~0 1 (* 3 (* c_main_~y~0 c_main_~y~0))) (div (+ .cse1 .cse2 4 .cse3) 4))) (not (= 0 (mod (+ .cse1 .cse2 .cse3) 4))) (< (+ c_main_~c~0 1) c_main_~k~0) (not (< c_main_~c~0 c_main_~k~0)))) is different from false [2022-03-17 22:50:07,382 WARN L833 $PredicateComparison]: unable to prove that (or (= (+ (* c_main_~y~0 c_main_~k~0) c_main_~k~0) (+ (* 2 c_main_~y~0) (* c_main_~y~0 c_main_~y~0) 1)) (<= c_main_~k~0 c_main_~c~0) (not (= 0 (mod (+ (* 6 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 13 c_main_~y~0 c_main_~y~0) (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) 4))) (< (+ c_main_~c~0 1) c_main_~k~0)) is different from false [2022-03-17 22:50:13,417 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) (<= c_main_~k~0 (+ c_main_~c~0 1)) (not (= (mod (+ (* 6 .cse0 .cse0 .cse0) (* .cse0 .cse0 .cse0 .cse0) (* 13 .cse0 .cse0)) 4) 0)))) is different from false [2022-03-17 22:52:10,948 WARN L833 $PredicateComparison]: unable to prove that (or (not (= (mod (let ((.cse0 (+ 6 c_main_~y~0))) (+ (* .cse0 .cse0 .cse0 6) (* .cse0 .cse0 13) (* .cse0 .cse0 .cse0 .cse0))) 4) 0)) (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)))))) is different from false [2022-03-17 22:52:12,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:52:12,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884870983] [2022-03-17 22:52:12,966 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:52:12,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428014668] [2022-03-17 22:52:12,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428014668] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 22:52:12,966 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 22:52:12,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-03-17 22:52:12,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580215382] [2022-03-17 22:52:12,966 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 22:52:12,967 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-17 22:52:12,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:52:12,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-17 22:52:12,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=742, Unknown=6, NotChecked=236, Total=1122 [2022-03-17 22:52:12,968 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) [2022-03-17 22:52:13,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:52:13,360 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2022-03-17 22:52:13,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-17 22:52:13,360 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 [2022-03-17 22:52:13,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:52:13,361 INFO L225 Difference]: With dead ends: 72 [2022-03-17 22:52:13,361 INFO L226 Difference]: Without dead ends: 67 [2022-03-17 22:52:13,361 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 93.6s TimeCoverageRelationStatistics Valid=159, Invalid=907, Unknown=6, NotChecked=260, Total=1332 [2022-03-17 22:52:13,362 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 8 mSDsluCounter, 706 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-17 22:52:13,362 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 748 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-17 22:52:13,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-17 22:52:13,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-03-17 22:52:13,367 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) [2022-03-17 22:52:13,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2022-03-17 22:52:13,367 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 107 [2022-03-17 22:52:13,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:52:13,367 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2022-03-17 22:52:13,367 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) [2022-03-17 22:52:13,367 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2022-03-17 22:52:13,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-03-17 22:52:13,368 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:52:13,368 INFO L500 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] [2022-03-17 22:52:13,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-17 22:52:13,568 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 [2022-03-17 22:52:13,569 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:52:13,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:52:13,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1740638574, now seen corresponding path program 13 times [2022-03-17 22:52:13,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:52:13,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230812035] [2022-03-17 22:52:13,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:52:13,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:52:13,577 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:52:13,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1745168841] [2022-03-17 22:52:13,577 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-17 22:52:13,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:52:13,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:52:13,579 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) [2022-03-17 22:52:13,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-17 22:52:14,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 22:52:14,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-17 22:52:14,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:52:14,892 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 98 proven. 275 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2022-03-17 22:52:14,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 22:52:44,502 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 [2022-03-17 22:52:44,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:52:44,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230812035] [2022-03-17 22:52:44,504 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:52:44,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745168841] [2022-03-17 22:52:44,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745168841] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 22:52:44,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 22:52:44,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-03-17 22:52:44,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763253490] [2022-03-17 22:52:44,504 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 22:52:44,505 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-17 22:52:44,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:52:44,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-17 22:52:44,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=666, Unknown=6, NotChecked=52, Total=812 [2022-03-17 22:52:44,506 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) [2022-03-17 22:52:44,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:52:44,893 INFO L93 Difference]: Finished difference Result 75 states and 88 transitions. [2022-03-17 22:52:44,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-17 22:52:44,893 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 [2022-03-17 22:52:44,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:52:44,894 INFO L225 Difference]: With dead ends: 75 [2022-03-17 22:52:44,894 INFO L226 Difference]: Without dead ends: 70 [2022-03-17 22:52:44,894 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 25.7s TimeCoverageRelationStatistics Valid=109, Invalid=819, Unknown=6, NotChecked=58, Total=992 [2022-03-17 22:52:44,895 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 8 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 799 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-17 22:52:44,895 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 799 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-17 22:52:44,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-17 22:52:44,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-03-17 22:52:44,900 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) [2022-03-17 22:52:44,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 83 transitions. [2022-03-17 22:52:44,901 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 83 transitions. Word has length 114 [2022-03-17 22:52:44,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:52:44,901 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 83 transitions. [2022-03-17 22:52:44,901 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) [2022-03-17 22:52:44,901 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 83 transitions. [2022-03-17 22:52:44,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-03-17 22:52:44,902 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:52:44,902 INFO L500 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] [2022-03-17 22:52:44,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-17 22:52:45,108 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 [2022-03-17 22:52:45,109 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:52:45,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:52:45,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1682036992, now seen corresponding path program 14 times [2022-03-17 22:52:45,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:52:45,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024888221] [2022-03-17 22:52:45,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:52:45,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:52:45,115 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:52:45,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [396170637] [2022-03-17 22:52:45,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 22:52:45,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:52:45,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:52:45,116 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) [2022-03-17 22:52:45,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-17 22:52:45,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 22:52:45,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 22:52:45,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-17 22:52:45,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:52:45,999 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 30 proven. 315 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-17 22:52:45,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 22:52:46,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:52:46,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024888221] [2022-03-17 22:52:46,160 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:52:46,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396170637] [2022-03-17 22:52:46,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396170637] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 22:52:46,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 22:52:46,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-03-17 22:52:46,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130097316] [2022-03-17 22:52:46,161 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 22:52:46,161 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-17 22:52:46,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:52:46,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-17 22:52:46,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-03-17 22:52:46,162 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) [2022-03-17 22:52:46,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:52:46,501 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2022-03-17 22:52:46,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-17 22:52:46,501 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 [2022-03-17 22:52:46,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:52:46,502 INFO L225 Difference]: With dead ends: 78 [2022-03-17 22:52:46,502 INFO L226 Difference]: Without dead ends: 73 [2022-03-17 22:52:46,503 INFO L911 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 [2022-03-17 22:52:46,503 INFO L912 BasicCegarLoop]: 64 mSDtfsCounter, 2 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-17 22:52:46,503 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 909 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-17 22:52:46,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-17 22:52:46,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-03-17 22:52:46,508 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) [2022-03-17 22:52:46,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 87 transitions. [2022-03-17 22:52:46,509 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 87 transitions. Word has length 121 [2022-03-17 22:52:46,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:52:46,509 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 87 transitions. [2022-03-17 22:52:46,509 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) [2022-03-17 22:52:46,509 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 87 transitions. [2022-03-17 22:52:46,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-03-17 22:52:46,510 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:52:46,510 INFO L500 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] [2022-03-17 22:52:46,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-17 22:52:46,715 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 [2022-03-17 22:52:46,715 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:52:46,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:52:46,715 INFO L85 PathProgramCache]: Analyzing trace with hash 699088594, now seen corresponding path program 15 times [2022-03-17 22:52:46,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:52:46,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990133794] [2022-03-17 22:52:46,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:52:46,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:52:46,722 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:52:46,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1172443256] [2022-03-17 22:52:46,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 22:52:46,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:52:46,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:52:46,723 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) [2022-03-17 22:52:46,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-17 22:52:47,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-03-17 22:52:47,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 22:52:47,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-17 22:52:47,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:52:47,746 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 32 proven. 360 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-17 22:52:47,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 22:52:49,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:52:49,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990133794] [2022-03-17 22:52:49,081 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:52:49,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172443256] [2022-03-17 22:52:49,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172443256] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 22:52:49,081 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 22:52:49,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-03-17 22:52:49,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800511431] [2022-03-17 22:52:49,082 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 22:52:49,082 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-17 22:52:49,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:52:49,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-17 22:52:49,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=1101, Unknown=0, NotChecked=0, Total=1406 [2022-03-17 22:52:49,083 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) [2022-03-17 22:52:49,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:52:49,454 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2022-03-17 22:52:49,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-17 22:52:49,454 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 [2022-03-17 22:52:49,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:52:49,455 INFO L225 Difference]: With dead ends: 81 [2022-03-17 22:52:49,455 INFO L226 Difference]: Without dead ends: 76 [2022-03-17 22:52:49,455 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 201 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=315, Invalid=1245, Unknown=0, NotChecked=0, Total=1560 [2022-03-17 22:52:49,456 INFO L912 BasicCegarLoop]: 67 mSDtfsCounter, 2 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 997 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-17 22:52:49,456 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 997 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-17 22:52:49,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-03-17 22:52:49,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2022-03-17 22:52:49,461 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) [2022-03-17 22:52:49,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 91 transitions. [2022-03-17 22:52:49,462 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 91 transitions. Word has length 128 [2022-03-17 22:52:49,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:52:49,462 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 91 transitions. [2022-03-17 22:52:49,462 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) [2022-03-17 22:52:49,462 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 91 transitions. [2022-03-17 22:52:49,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-17 22:52:49,463 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:52:49,463 INFO L500 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] [2022-03-17 22:52:49,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-17 22:52:49,668 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 [2022-03-17 22:52:49,669 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:52:49,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:52:49,669 INFO L85 PathProgramCache]: Analyzing trace with hash -119728448, now seen corresponding path program 16 times [2022-03-17 22:52:49,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:52:49,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549996509] [2022-03-17 22:52:49,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:52:49,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:52:49,677 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:52:49,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1565300787] [2022-03-17 22:52:49,677 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-17 22:52:49,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:52:49,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:52:49,678 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) [2022-03-17 22:52:49,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-17 22:52:50,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-17 22:52:50,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 22:52:50,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 83 conjunts are in the unsatisfiable core [2022-03-17 22:52:50,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:52:50,565 INFO L134 CoverageAnalysis]: Checked inductivity of 986 backedges. 122 proven. 410 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2022-03-17 22:52:50,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 22:53:18,454 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 (= 0 (mod (+ (* 6 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 13 c_main_~y~0 c_main_~y~0) (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) 4)))) is different from false [2022-03-17 22:53:18,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:53:18,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549996509] [2022-03-17 22:53:18,456 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:53:18,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565300787] [2022-03-17 22:53:18,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565300787] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 22:53:18,457 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 22:53:18,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2022-03-17 22:53:18,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425511398] [2022-03-17 22:53:18,457 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 22:53:18,457 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-17 22:53:18,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:53:18,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-17 22:53:18,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=830, Unknown=7, NotChecked=58, Total=992 [2022-03-17 22:53:18,458 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) [2022-03-17 22:53:18,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:53:18,963 INFO L93 Difference]: Finished difference Result 84 states and 100 transitions. [2022-03-17 22:53:18,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-17 22:53:18,963 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 [2022-03-17 22:53:18,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:53:18,964 INFO L225 Difference]: With dead ends: 84 [2022-03-17 22:53:18,964 INFO L226 Difference]: Without dead ends: 79 [2022-03-17 22:53:18,965 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 24.0s TimeCoverageRelationStatistics Valid=118, Invalid=1001, Unknown=7, NotChecked=64, Total=1190 [2022-03-17 22:53:18,965 INFO L912 BasicCegarLoop]: 50 mSDtfsCounter, 8 mSDsluCounter, 987 mSDsCounter, 0 mSdLazyCounter, 950 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1037 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-17 22:53:18,965 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 1037 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 950 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-17 22:53:18,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-17 22:53:18,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-03-17 22:53:18,971 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) [2022-03-17 22:53:18,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 95 transitions. [2022-03-17 22:53:18,972 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 95 transitions. Word has length 135 [2022-03-17 22:53:18,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:53:18,972 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 95 transitions. [2022-03-17 22:53:18,972 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) [2022-03-17 22:53:18,972 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 95 transitions. [2022-03-17 22:53:18,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-03-17 22:53:18,973 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:53:18,973 INFO L500 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] [2022-03-17 22:53:18,978 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-03-17 22:53:19,178 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 [2022-03-17 22:53:19,178 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:53:19,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:53:19,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1869408494, now seen corresponding path program 17 times [2022-03-17 22:53:19,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:53:19,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098014799] [2022-03-17 22:53:19,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:53:19,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:53:19,192 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:53:19,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [621148577] [2022-03-17 22:53:19,192 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-17 22:53:19,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:53:19,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:53:19,194 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) [2022-03-17 22:53:19,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-17 22:53:20,350 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2022-03-17 22:53:20,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 22:53:20,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 76 conjunts are in the unsatisfiable core [2022-03-17 22:53:20,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:53:20,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 36 proven. 459 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-03-17 22:53:20,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 22:53:21,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:53:21,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098014799] [2022-03-17 22:53:21,011 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:53:21,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621148577] [2022-03-17 22:53:21,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621148577] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 22:53:21,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 22:53:21,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-03-17 22:53:21,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640849188] [2022-03-17 22:53:21,011 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 22:53:21,011 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-17 22:53:21,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:53:21,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-17 22:53:21,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2022-03-17 22:53:21,012 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) [2022-03-17 22:53:21,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:53:21,460 INFO L93 Difference]: Finished difference Result 87 states and 104 transitions. [2022-03-17 22:53:21,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-17 22:53:21,460 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 [2022-03-17 22:53:21,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:53:21,461 INFO L225 Difference]: With dead ends: 87 [2022-03-17 22:53:21,461 INFO L226 Difference]: Without dead ends: 82 [2022-03-17 22:53:21,461 INFO L911 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 [2022-03-17 22:53:21,462 INFO L912 BasicCegarLoop]: 73 mSDtfsCounter, 2 mSDsluCounter, 1112 mSDsCounter, 0 mSdLazyCounter, 805 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1185 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-17 22:53:21,462 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1185 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 805 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-17 22:53:21,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-03-17 22:53:21,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-03-17 22:53:21,468 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) [2022-03-17 22:53:21,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 99 transitions. [2022-03-17 22:53:21,469 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 99 transitions. Word has length 142 [2022-03-17 22:53:21,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:53:21,469 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 99 transitions. [2022-03-17 22:53:21,469 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) [2022-03-17 22:53:21,469 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 99 transitions. [2022-03-17 22:53:21,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-17 22:53:21,470 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:53:21,470 INFO L500 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] [2022-03-17 22:53:21,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-17 22:53:21,676 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 [2022-03-17 22:53:21,677 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:53:21,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:53:21,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1178433152, now seen corresponding path program 18 times [2022-03-17 22:53:21,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:53:21,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820788079] [2022-03-17 22:53:21,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:53:21,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:53:21,689 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:53:21,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1572530998] [2022-03-17 22:53:21,689 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-17 22:53:21,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:53:21,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:53:21,690 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) [2022-03-17 22:53:21,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-17 22:53:30,365 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-03-17 22:53:30,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 22:53:30,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 80 conjunts are in the unsatisfiable core [2022-03-17 22:53:30,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:53:30,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 38 proven. 513 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2022-03-17 22:53:30,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 22:53:31,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:53:31,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820788079] [2022-03-17 22:53:31,004 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:53:31,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572530998] [2022-03-17 22:53:31,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572530998] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 22:53:31,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 22:53:31,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2022-03-17 22:53:31,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286977399] [2022-03-17 22:53:31,005 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 22:53:31,005 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-17 22:53:31,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:53:31,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-17 22:53:31,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-03-17 22:53:31,006 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) [2022-03-17 22:53:31,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:53:31,504 INFO L93 Difference]: Finished difference Result 90 states and 108 transitions. [2022-03-17 22:53:31,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-17 22:53:31,504 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 [2022-03-17 22:53:31,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:53:31,505 INFO L225 Difference]: With dead ends: 90 [2022-03-17 22:53:31,505 INFO L226 Difference]: Without dead ends: 85 [2022-03-17 22:53:31,505 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2022-03-17 22:53:31,506 INFO L912 BasicCegarLoop]: 76 mSDtfsCounter, 2 mSDsluCounter, 1209 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1285 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-17 22:53:31,506 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1285 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 887 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-17 22:53:31,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-03-17 22:53:31,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-03-17 22:53:31,512 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) [2022-03-17 22:53:31,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 103 transitions. [2022-03-17 22:53:31,513 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 103 transitions. Word has length 149 [2022-03-17 22:53:31,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:53:31,513 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 103 transitions. [2022-03-17 22:53:31,513 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) [2022-03-17 22:53:31,514 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 103 transitions. [2022-03-17 22:53:31,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-03-17 22:53:31,514 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:53:31,514 INFO L500 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] [2022-03-17 22:53:31,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-17 22:53:31,719 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 [2022-03-17 22:53:31,719 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:53:31,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:53:31,720 INFO L85 PathProgramCache]: Analyzing trace with hash -272924846, now seen corresponding path program 19 times [2022-03-17 22:53:31,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:53:31,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569651893] [2022-03-17 22:53:31,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:53:31,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:53:31,726 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:53:31,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [93260499] [2022-03-17 22:53:31,727 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-17 22:53:31,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:53:31,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:53:31,728 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) [2022-03-17 22:53:31,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-17 22:53:32,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 22:53:32,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 84 conjunts are in the unsatisfiable core [2022-03-17 22:53:32,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:53:32,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 40 proven. 570 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-03-17 22:53:32,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 22:53:33,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:53:33,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569651893] [2022-03-17 22:53:33,023 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:53:33,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93260499] [2022-03-17 22:53:33,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93260499] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 22:53:33,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 22:53:33,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2022-03-17 22:53:33,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456316508] [2022-03-17 22:53:33,023 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 22:53:33,023 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-17 22:53:33,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:53:33,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-17 22:53:33,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2022-03-17 22:53:33,024 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) [2022-03-17 22:53:33,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:53:33,546 INFO L93 Difference]: Finished difference Result 93 states and 112 transitions. [2022-03-17 22:53:33,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-17 22:53:33,547 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 [2022-03-17 22:53:33,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:53:33,547 INFO L225 Difference]: With dead ends: 93 [2022-03-17 22:53:33,547 INFO L226 Difference]: Without dead ends: 88 [2022-03-17 22:53:33,548 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2022-03-17 22:53:33,548 INFO L912 BasicCegarLoop]: 79 mSDtfsCounter, 2 mSDsluCounter, 1310 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1389 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-17 22:53:33,548 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1389 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 973 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-17 22:53:33,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-17 22:53:33,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-03-17 22:53:33,555 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) [2022-03-17 22:53:33,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 107 transitions. [2022-03-17 22:53:33,556 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 107 transitions. Word has length 156 [2022-03-17 22:53:33,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:53:33,556 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 107 transitions. [2022-03-17 22:53:33,556 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) [2022-03-17 22:53:33,556 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 107 transitions. [2022-03-17 22:53:33,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-03-17 22:53:33,557 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:53:33,557 INFO L500 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] [2022-03-17 22:53:33,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-17 22:53:33,760 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 [2022-03-17 22:53:33,761 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:53:33,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:53:33,761 INFO L85 PathProgramCache]: Analyzing trace with hash 2090550848, now seen corresponding path program 20 times [2022-03-17 22:53:33,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:53:33,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634681128] [2022-03-17 22:53:33,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:53:33,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:53:33,767 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:53:33,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [393057266] [2022-03-17 22:53:33,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 22:53:33,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:53:33,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:53:33,769 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) [2022-03-17 22:53:33,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-17 22:53:34,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 22:53:34,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 22:53:34,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 88 conjunts are in the unsatisfiable core [2022-03-17 22:53:34,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:53:34,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 42 proven. 630 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-03-17 22:53:34,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 22:53:35,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:53:35,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634681128] [2022-03-17 22:53:35,004 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:53:35,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393057266] [2022-03-17 22:53:35,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393057266] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 22:53:35,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 22:53:35,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2022-03-17 22:53:35,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177025633] [2022-03-17 22:53:35,004 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 22:53:35,004 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-17 22:53:35,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:53:35,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-17 22:53:35,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2022-03-17 22:53:35,005 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) [2022-03-17 22:53:35,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:53:35,582 INFO L93 Difference]: Finished difference Result 96 states and 116 transitions. [2022-03-17 22:53:35,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-17 22:53:35,582 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 [2022-03-17 22:53:35,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:53:35,583 INFO L225 Difference]: With dead ends: 96 [2022-03-17 22:53:35,583 INFO L226 Difference]: Without dead ends: 91 [2022-03-17 22:53:35,584 INFO L911 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 [2022-03-17 22:53:35,584 INFO L912 BasicCegarLoop]: 82 mSDtfsCounter, 2 mSDsluCounter, 1415 mSDsCounter, 0 mSdLazyCounter, 1063 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1497 SdHoareTripleChecker+Invalid, 1063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-17 22:53:35,584 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1497 Invalid, 1063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1063 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-17 22:53:35,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-03-17 22:53:35,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-03-17 22:53:35,591 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) [2022-03-17 22:53:35,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 111 transitions. [2022-03-17 22:53:35,591 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 111 transitions. Word has length 163 [2022-03-17 22:53:35,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:53:35,592 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 111 transitions. [2022-03-17 22:53:35,592 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) [2022-03-17 22:53:35,592 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 111 transitions. [2022-03-17 22:53:35,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-03-17 22:53:35,592 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:53:35,593 INFO L500 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] [2022-03-17 22:53:35,598 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-03-17 22:53:35,798 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 [2022-03-17 22:53:35,798 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:53:35,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:53:35,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1122531218, now seen corresponding path program 21 times [2022-03-17 22:53:35,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:53:35,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515608331] [2022-03-17 22:53:35,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:53:35,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:53:35,804 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:53:35,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1771369471] [2022-03-17 22:53:35,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 22:53:35,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:53:35,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:53:35,805 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) [2022-03-17 22:53:35,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-17 22:53:37,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2022-03-17 22:53:37,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 22:53:37,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 92 conjunts are in the unsatisfiable core [2022-03-17 22:53:37,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:53:38,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 44 proven. 693 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2022-03-17 22:53:38,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 22:53:38,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:53:38,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515608331] [2022-03-17 22:53:38,424 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:53:38,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771369471] [2022-03-17 22:53:38,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771369471] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 22:53:38,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 22:53:38,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2022-03-17 22:53:38,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388323463] [2022-03-17 22:53:38,424 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 22:53:38,425 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-17 22:53:38,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:53:38,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-17 22:53:38,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2022-03-17 22:53:38,425 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) [2022-03-17 22:53:39,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:53:39,050 INFO L93 Difference]: Finished difference Result 99 states and 120 transitions. [2022-03-17 22:53:39,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-17 22:53:39,051 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 [2022-03-17 22:53:39,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:53:39,051 INFO L225 Difference]: With dead ends: 99 [2022-03-17 22:53:39,051 INFO L226 Difference]: Without dead ends: 94 [2022-03-17 22:53:39,052 INFO L911 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 [2022-03-17 22:53:39,052 INFO L912 BasicCegarLoop]: 85 mSDtfsCounter, 2 mSDsluCounter, 1524 mSDsCounter, 0 mSdLazyCounter, 1157 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1609 SdHoareTripleChecker+Invalid, 1157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-17 22:53:39,052 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1609 Invalid, 1157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1157 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-17 22:53:39,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-03-17 22:53:39,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-03-17 22:53:39,068 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) [2022-03-17 22:53:39,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 115 transitions. [2022-03-17 22:53:39,068 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 115 transitions. Word has length 170 [2022-03-17 22:53:39,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:53:39,069 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 115 transitions. [2022-03-17 22:53:39,073 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) [2022-03-17 22:53:39,073 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 115 transitions. [2022-03-17 22:53:39,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-03-17 22:53:39,074 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:53:39,074 INFO L500 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] [2022-03-17 22:53:39,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-17 22:53:39,281 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 [2022-03-17 22:53:39,281 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:53:39,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:53:39,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1682799104, now seen corresponding path program 22 times [2022-03-17 22:53:39,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:53:39,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431304094] [2022-03-17 22:53:39,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:53:39,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:53:39,288 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:53:39,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [605940155] [2022-03-17 22:53:39,288 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-17 22:53:39,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:53:39,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:53:39,289 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) [2022-03-17 22:53:39,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-17 22:53:39,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-17 22:53:39,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 22:53:39,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 96 conjunts are in the unsatisfiable core [2022-03-17 22:53:39,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:53:40,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1817 backedges. 46 proven. 759 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-03-17 22:53:40,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 22:53:40,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:53:40,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431304094] [2022-03-17 22:53:40,630 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:53:40,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605940155] [2022-03-17 22:53:40,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605940155] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 22:53:40,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 22:53:40,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2022-03-17 22:53:40,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376329938] [2022-03-17 22:53:40,630 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 22:53:40,631 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-17 22:53:40,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:53:40,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-17 22:53:40,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2022-03-17 22:53:40,631 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) [2022-03-17 22:53:41,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:53:41,289 INFO L93 Difference]: Finished difference Result 102 states and 124 transitions. [2022-03-17 22:53:41,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-17 22:53:41,289 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 [2022-03-17 22:53:41,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:53:41,290 INFO L225 Difference]: With dead ends: 102 [2022-03-17 22:53:41,290 INFO L226 Difference]: Without dead ends: 97 [2022-03-17 22:53:41,290 INFO L911 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 [2022-03-17 22:53:41,291 INFO L912 BasicCegarLoop]: 88 mSDtfsCounter, 2 mSDsluCounter, 1637 mSDsCounter, 0 mSdLazyCounter, 1255 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1725 SdHoareTripleChecker+Invalid, 1255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-17 22:53:41,291 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1725 Invalid, 1255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1255 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-17 22:53:41,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-17 22:53:41,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-03-17 22:53:41,299 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) [2022-03-17 22:53:41,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 119 transitions. [2022-03-17 22:53:41,299 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 119 transitions. Word has length 177 [2022-03-17 22:53:41,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:53:41,300 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 119 transitions. [2022-03-17 22:53:41,300 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) [2022-03-17 22:53:41,300 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 119 transitions. [2022-03-17 22:53:41,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-03-17 22:53:41,300 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:53:41,301 INFO L500 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] [2022-03-17 22:53:41,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-17 22:53:41,505 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 [2022-03-17 22:53:41,506 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:53:41,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:53:41,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1629618222, now seen corresponding path program 23 times [2022-03-17 22:53:41,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:53:41,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296519365] [2022-03-17 22:53:41,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:53:41,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:53:41,512 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:53:41,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [409894425] [2022-03-17 22:53:41,512 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-17 22:53:41,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:53:41,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:53:41,514 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) [2022-03-17 22:53:41,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-17 22:54:01,940 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-03-17 22:54:01,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 22:54:01,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 100 conjunts are in the unsatisfiable core [2022-03-17 22:54:01,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:54:02,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 48 proven. 828 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2022-03-17 22:54:02,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 22:54:02,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:54:02,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296519365] [2022-03-17 22:54:02,740 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:54:02,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409894425] [2022-03-17 22:54:02,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409894425] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 22:54:02,740 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 22:54:02,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2022-03-17 22:54:02,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331675269] [2022-03-17 22:54:02,741 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 22:54:02,741 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-17 22:54:02,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:54:02,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-17 22:54:02,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2022-03-17 22:54:02,742 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) [2022-03-17 22:54:03,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:54:03,457 INFO L93 Difference]: Finished difference Result 105 states and 128 transitions. [2022-03-17 22:54:03,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-17 22:54:03,458 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 [2022-03-17 22:54:03,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:54:03,458 INFO L225 Difference]: With dead ends: 105 [2022-03-17 22:54:03,458 INFO L226 Difference]: Without dead ends: 100 [2022-03-17 22:54:03,459 INFO L911 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 [2022-03-17 22:54:03,459 INFO L912 BasicCegarLoop]: 91 mSDtfsCounter, 2 mSDsluCounter, 1754 mSDsCounter, 0 mSdLazyCounter, 1357 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1845 SdHoareTripleChecker+Invalid, 1357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-17 22:54:03,459 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1845 Invalid, 1357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1357 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-17 22:54:03,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-17 22:54:03,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-03-17 22:54:03,467 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) [2022-03-17 22:54:03,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 123 transitions. [2022-03-17 22:54:03,467 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 123 transitions. Word has length 184 [2022-03-17 22:54:03,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:54:03,467 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 123 transitions. [2022-03-17 22:54:03,468 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) [2022-03-17 22:54:03,468 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 123 transitions. [2022-03-17 22:54:03,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-03-17 22:54:03,468 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:54:03,468 INFO L500 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] [2022-03-17 22:54:03,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-17 22:54:03,683 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 [2022-03-17 22:54:03,683 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:54:03,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:54:03,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1782527424, now seen corresponding path program 24 times [2022-03-17 22:54:03,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:54:03,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388978763] [2022-03-17 22:54:03,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:54:03,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:54:03,690 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:54:03,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [182962246] [2022-03-17 22:54:03,690 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-17 22:54:03,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:54:03,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:54:03,691 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) [2022-03-17 22:54:03,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-17 22:54:05,193 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2022-03-17 22:54:05,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 22:54:05,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 104 conjunts are in the unsatisfiable core [2022-03-17 22:54:05,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:54:05,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2150 backedges. 50 proven. 900 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2022-03-17 22:54:05,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 22:54:06,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:54:06,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388978763] [2022-03-17 22:54:06,094 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:54:06,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182962246] [2022-03-17 22:54:06,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182962246] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 22:54:06,095 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 22:54:06,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2022-03-17 22:54:06,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927552258] [2022-03-17 22:54:06,095 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 22:54:06,095 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-17 22:54:06,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:54:06,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-17 22:54:06,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2022-03-17 22:54:06,097 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) [2022-03-17 22:54:06,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:54:06,832 INFO L93 Difference]: Finished difference Result 108 states and 132 transitions. [2022-03-17 22:54:06,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-17 22:54:06,832 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 [2022-03-17 22:54:06,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:54:06,833 INFO L225 Difference]: With dead ends: 108 [2022-03-17 22:54:06,833 INFO L226 Difference]: Without dead ends: 103 [2022-03-17 22:54:06,834 INFO L911 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 [2022-03-17 22:54:06,834 INFO L912 BasicCegarLoop]: 94 mSDtfsCounter, 2 mSDsluCounter, 1875 mSDsCounter, 0 mSdLazyCounter, 1463 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1969 SdHoareTripleChecker+Invalid, 1463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-17 22:54:06,834 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1969 Invalid, 1463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1463 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-17 22:54:06,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-17 22:54:06,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-03-17 22:54:06,841 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) [2022-03-17 22:54:06,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 127 transitions. [2022-03-17 22:54:06,842 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 127 transitions. Word has length 191 [2022-03-17 22:54:06,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:54:06,842 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 127 transitions. [2022-03-17 22:54:06,842 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) [2022-03-17 22:54:06,843 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 127 transitions. [2022-03-17 22:54:06,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-03-17 22:54:06,843 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:54:06,843 INFO L500 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] [2022-03-17 22:54:06,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-17 22:54:07,050 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 [2022-03-17 22:54:07,050 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:54:07,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:54:07,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1902123026, now seen corresponding path program 25 times [2022-03-17 22:54:07,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:54:07,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203321701] [2022-03-17 22:54:07,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:54:07,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:54:07,056 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:54:07,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1041369405] [2022-03-17 22:54:07,057 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-17 22:54:07,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:54:07,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:54:07,058 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) [2022-03-17 22:54:07,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-17 22:54:07,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 22:54:07,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 108 conjunts are in the unsatisfiable core [2022-03-17 22:54:07,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:54:08,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2327 backedges. 52 proven. 975 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2022-03-17 22:54:08,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 22:54:08,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:54:08,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203321701] [2022-03-17 22:54:08,811 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:54:08,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041369405] [2022-03-17 22:54:08,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041369405] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 22:54:08,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 22:54:08,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2022-03-17 22:54:08,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398106475] [2022-03-17 22:54:08,811 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 22:54:08,811 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-17 22:54:08,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:54:08,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-17 22:54:08,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2022-03-17 22:54:08,812 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) [2022-03-17 22:54:09,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:54:09,596 INFO L93 Difference]: Finished difference Result 111 states and 136 transitions. [2022-03-17 22:54:09,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-17 22:54:09,596 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 [2022-03-17 22:54:09,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:54:09,597 INFO L225 Difference]: With dead ends: 111 [2022-03-17 22:54:09,597 INFO L226 Difference]: Without dead ends: 106 [2022-03-17 22:54:09,598 INFO L911 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 [2022-03-17 22:54:09,598 INFO L912 BasicCegarLoop]: 97 mSDtfsCounter, 2 mSDsluCounter, 2000 mSDsCounter, 0 mSdLazyCounter, 1573 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2097 SdHoareTripleChecker+Invalid, 1573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-17 22:54:09,598 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2097 Invalid, 1573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1573 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-17 22:54:09,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-03-17 22:54:09,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2022-03-17 22:54:09,606 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) [2022-03-17 22:54:09,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 131 transitions. [2022-03-17 22:54:09,607 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 131 transitions. Word has length 198 [2022-03-17 22:54:09,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:54:09,607 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 131 transitions. [2022-03-17 22:54:09,607 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) [2022-03-17 22:54:09,607 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 131 transitions. [2022-03-17 22:54:09,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-03-17 22:54:09,608 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:54:09,608 INFO L500 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] [2022-03-17 22:54:09,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-17 22:54:09,813 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 [2022-03-17 22:54:09,814 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:54:09,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:54:09,814 INFO L85 PathProgramCache]: Analyzing trace with hash 905794944, now seen corresponding path program 26 times [2022-03-17 22:54:09,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:54:09,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181118860] [2022-03-17 22:54:09,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:54:09,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:54:09,821 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:54:09,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1607343475] [2022-03-17 22:54:09,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 22:54:09,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:54:09,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:54:09,822 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) [2022-03-17 22:54:09,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-17 22:54:10,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 22:54:10,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 22:54:10,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 112 conjunts are in the unsatisfiable core [2022-03-17 22:54:10,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:54:11,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2511 backedges. 54 proven. 1053 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2022-03-17 22:54:11,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 22:54:11,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:54:11,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181118860] [2022-03-17 22:54:11,395 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:54:11,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607343475] [2022-03-17 22:54:11,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607343475] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 22:54:11,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 22:54:11,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2022-03-17 22:54:11,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408387595] [2022-03-17 22:54:11,396 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 22:54:11,396 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-17 22:54:11,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:54:11,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-17 22:54:11,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2022-03-17 22:54:11,397 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) [2022-03-17 22:54:12,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:54:12,246 INFO L93 Difference]: Finished difference Result 114 states and 140 transitions. [2022-03-17 22:54:12,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-17 22:54:12,247 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 [2022-03-17 22:54:12,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:54:12,247 INFO L225 Difference]: With dead ends: 114 [2022-03-17 22:54:12,247 INFO L226 Difference]: Without dead ends: 109 [2022-03-17 22:54:12,248 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 183 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=1223, Unknown=0, NotChecked=0, Total=1332 [2022-03-17 22:54:12,248 INFO L912 BasicCegarLoop]: 100 mSDtfsCounter, 2 mSDsluCounter, 2129 mSDsCounter, 0 mSdLazyCounter, 1687 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2229 SdHoareTripleChecker+Invalid, 1687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-17 22:54:12,248 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2229 Invalid, 1687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1687 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-17 22:54:12,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-03-17 22:54:12,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2022-03-17 22:54:12,256 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) [2022-03-17 22:54:12,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 135 transitions. [2022-03-17 22:54:12,257 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 135 transitions. Word has length 205 [2022-03-17 22:54:12,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:54:12,257 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 135 transitions. [2022-03-17 22:54:12,257 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) [2022-03-17 22:54:12,258 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 135 transitions. [2022-03-17 22:54:12,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-03-17 22:54:12,258 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:54:12,258 INFO L500 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] [2022-03-17 22:54:12,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-17 22:54:12,464 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 [2022-03-17 22:54:12,464 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:54:12,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:54:12,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1053638574, now seen corresponding path program 27 times [2022-03-17 22:54:12,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:54:12,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983292300] [2022-03-17 22:54:12,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:54:12,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:54:12,471 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:54:12,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1031733893] [2022-03-17 22:54:12,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 22:54:12,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:54:12,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:54:12,473 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) [2022-03-17 22:54:12,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-17 22:54:14,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2022-03-17 22:54:14,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 22:54:14,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 116 conjunts are in the unsatisfiable core [2022-03-17 22:54:14,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:54:14,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2702 backedges. 56 proven. 1134 refuted. 0 times theorem prover too weak. 1512 trivial. 0 not checked. [2022-03-17 22:54:14,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 22:54:15,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:54:15,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983292300] [2022-03-17 22:54:15,019 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:54:15,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031733893] [2022-03-17 22:54:15,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031733893] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 22:54:15,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 22:54:15,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2022-03-17 22:54:15,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582189955] [2022-03-17 22:54:15,019 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 22:54:15,019 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-17 22:54:15,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:54:15,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-17 22:54:15,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2022-03-17 22:54:15,020 INFO L87 Difference]: Start difference. First operand 109 states and 135 transitions. Second operand has 33 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 30 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 29 states have call predecessors, (30), 29 states have call successors, (30) [2022-03-17 22:54:15,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:54:15,931 INFO L93 Difference]: Finished difference Result 117 states and 144 transitions. [2022-03-17 22:54:15,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-17 22:54:15,931 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 30 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 29 states have call predecessors, (30), 29 states have call successors, (30) Word has length 212 [2022-03-17 22:54:15,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:54:15,932 INFO L225 Difference]: With dead ends: 117 [2022-03-17 22:54:15,932 INFO L226 Difference]: Without dead ends: 112 [2022-03-17 22:54:15,933 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 189 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=112, Invalid=1294, Unknown=0, NotChecked=0, Total=1406 [2022-03-17 22:54:15,933 INFO L912 BasicCegarLoop]: 103 mSDtfsCounter, 2 mSDsluCounter, 2262 mSDsCounter, 0 mSdLazyCounter, 1805 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2365 SdHoareTripleChecker+Invalid, 1805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-17 22:54:15,933 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2365 Invalid, 1805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1805 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-17 22:54:15,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-03-17 22:54:15,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2022-03-17 22:54:15,941 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) [2022-03-17 22:54:15,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 139 transitions. [2022-03-17 22:54:15,942 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 139 transitions. Word has length 212 [2022-03-17 22:54:15,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:54:15,942 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 139 transitions. [2022-03-17 22:54:15,942 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 30 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 29 states have call predecessors, (30), 29 states have call successors, (30) [2022-03-17 22:54:15,943 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 139 transitions. [2022-03-17 22:54:15,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-03-17 22:54:15,943 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:54:15,943 INFO L500 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] [2022-03-17 22:54:15,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-17 22:54:16,147 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 [2022-03-17 22:54:16,147 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:54:16,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:54:16,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1817647808, now seen corresponding path program 28 times [2022-03-17 22:54:16,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:54:16,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369688263] [2022-03-17 22:54:16,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:54:16,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:54:16,154 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:54:16,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2062769416] [2022-03-17 22:54:16,154 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-17 22:54:16,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:54:16,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:54:16,155 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) [2022-03-17 22:54:16,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-17 22:54:16,888 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-17 22:54:16,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 22:54:16,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 120 conjunts are in the unsatisfiable core [2022-03-17 22:54:16,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:54:17,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2900 backedges. 58 proven. 1218 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2022-03-17 22:54:17,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 22:54:17,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:54:17,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369688263] [2022-03-17 22:54:17,917 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:54:17,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062769416] [2022-03-17 22:54:17,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062769416] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 22:54:17,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 22:54:17,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2022-03-17 22:54:17,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081796047] [2022-03-17 22:54:17,918 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 22:54:17,918 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-17 22:54:17,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:54:17,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-17 22:54:17,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2022-03-17 22:54:17,919 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) [2022-03-17 22:54:18,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:54:18,842 INFO L93 Difference]: Finished difference Result 120 states and 148 transitions. [2022-03-17 22:54:18,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-17 22:54:18,843 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 [2022-03-17 22:54:18,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:54:18,843 INFO L225 Difference]: With dead ends: 120 [2022-03-17 22:54:18,843 INFO L226 Difference]: Without dead ends: 115 [2022-03-17 22:54:18,844 INFO L911 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 [2022-03-17 22:54:18,844 INFO L912 BasicCegarLoop]: 106 mSDtfsCounter, 2 mSDsluCounter, 2399 mSDsCounter, 0 mSdLazyCounter, 1927 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2505 SdHoareTripleChecker+Invalid, 1927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-17 22:54:18,845 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2505 Invalid, 1927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1927 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-17 22:54:18,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-03-17 22:54:18,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2022-03-17 22:54:18,853 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) [2022-03-17 22:54:18,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 143 transitions. [2022-03-17 22:54:18,853 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 143 transitions. Word has length 219 [2022-03-17 22:54:18,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:54:18,854 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 143 transitions. [2022-03-17 22:54:18,854 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) [2022-03-17 22:54:18,854 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 143 transitions. [2022-03-17 22:54:18,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-03-17 22:54:18,855 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:54:18,855 INFO L500 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] [2022-03-17 22:54:18,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-17 22:54:19,059 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 [2022-03-17 22:54:19,060 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:54:19,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:54:19,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1847195794, now seen corresponding path program 29 times [2022-03-17 22:54:19,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:54:19,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547827666] [2022-03-17 22:54:19,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:54:19,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:54:19,066 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:54:19,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1707344227] [2022-03-17 22:54:19,066 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-17 22:54:19,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:54:19,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:54:19,068 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) [2022-03-17 22:54:19,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-17 22:54:27,921 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2022-03-17 22:54:27,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 22:54:27,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 124 conjunts are in the unsatisfiable core [2022-03-17 22:54:27,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:54:28,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3105 backedges. 60 proven. 1305 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2022-03-17 22:54:28,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 22:54:28,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:54:28,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547827666] [2022-03-17 22:54:28,959 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:54:28,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707344227] [2022-03-17 22:54:28,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707344227] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 22:54:28,960 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 22:54:28,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2022-03-17 22:54:28,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085598721] [2022-03-17 22:54:28,960 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 22:54:28,960 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-17 22:54:28,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:54:28,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-17 22:54:28,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2022-03-17 22:54:28,961 INFO L87 Difference]: Start difference. First operand 115 states and 143 transitions. Second operand has 35 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 states have internal predecessors, (73), 32 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 31 states have call predecessors, (32), 31 states have call successors, (32) [2022-03-17 22:54:29,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:54:29,957 INFO L93 Difference]: Finished difference Result 123 states and 152 transitions. [2022-03-17 22:54:29,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-17 22:54:29,957 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 states have internal predecessors, (73), 32 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 31 states have call predecessors, (32), 31 states have call successors, (32) Word has length 226 [2022-03-17 22:54:29,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:54:29,958 INFO L225 Difference]: With dead ends: 123 [2022-03-17 22:54:29,958 INFO L226 Difference]: Without dead ends: 118 [2022-03-17 22:54:29,959 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 201 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=118, Invalid=1442, Unknown=0, NotChecked=0, Total=1560 [2022-03-17 22:54:29,959 INFO L912 BasicCegarLoop]: 109 mSDtfsCounter, 2 mSDsluCounter, 2540 mSDsCounter, 0 mSdLazyCounter, 2053 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2649 SdHoareTripleChecker+Invalid, 2053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-17 22:54:29,959 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2649 Invalid, 2053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2053 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-17 22:54:29,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-03-17 22:54:29,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2022-03-17 22:54:29,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 78 states have (on average 1.0128205128205128) internal successors, (79), 78 states have internal predecessors, (79), 35 states have call successors, (35), 6 states have call predecessors, (35), 4 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-03-17 22:54:29,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 147 transitions. [2022-03-17 22:54:29,969 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 147 transitions. Word has length 226 [2022-03-17 22:54:29,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:54:29,969 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 147 transitions. [2022-03-17 22:54:29,969 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 states have internal predecessors, (73), 32 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 31 states have call predecessors, (32), 31 states have call successors, (32) [2022-03-17 22:54:29,969 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 147 transitions. [2022-03-17 22:54:29,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-03-17 22:54:29,970 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:54:29,970 INFO L500 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 22:54:29,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-17 22:54:30,178 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:54:30,178 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:54:30,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:54:30,179 INFO L85 PathProgramCache]: Analyzing trace with hash 519955712, now seen corresponding path program 30 times [2022-03-17 22:54:30,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:54:30,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624397367] [2022-03-17 22:54:30,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:54:30,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:54:30,187 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:54:30,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1024418060] [2022-03-17 22:54:30,187 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-17 22:54:30,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:54:30,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:54:30,188 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 22:54:30,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-17 22:54:40,606 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2022-03-17 22:54:40,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 22:54:40,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 129 conjunts are in the unsatisfiable core [2022-03-17 22:54:40,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:54:41,684 INFO L134 CoverageAnalysis]: Checked inductivity of 3317 backedges. 62 proven. 1395 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2022-03-17 22:54:41,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 22:54:44,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:54:44,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624397367] [2022-03-17 22:54:44,798 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:54:44,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024418060] [2022-03-17 22:54:44,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024418060] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 22:54:44,798 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 22:54:44,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2022-03-17 22:54:44,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564368972] [2022-03-17 22:54:44,798 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 22:54:44,799 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-17 22:54:44,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:54:44,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-17 22:54:44,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=3516, Unknown=0, NotChecked=0, Total=4556 [2022-03-17 22:54:44,800 INFO L87 Difference]: Start difference. First operand 118 states and 147 transitions. Second operand has 36 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 33 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (33), 32 states have call predecessors, (33), 32 states have call successors, (33) [2022-03-17 22:54:45,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:54:45,905 INFO L93 Difference]: Finished difference Result 126 states and 156 transitions. [2022-03-17 22:54:45,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-17 22:54:45,905 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 33 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (33), 32 states have call predecessors, (33), 32 states have call successors, (33) Word has length 233 [2022-03-17 22:54:45,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:54:45,906 INFO L225 Difference]: With dead ends: 126 [2022-03-17 22:54:45,906 INFO L226 Difference]: Without dead ends: 121 [2022-03-17 22:54:45,907 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 381 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1050, Invalid=3780, Unknown=0, NotChecked=0, Total=4830 [2022-03-17 22:54:45,907 INFO L912 BasicCegarLoop]: 112 mSDtfsCounter, 2 mSDsluCounter, 2685 mSDsCounter, 0 mSdLazyCounter, 2183 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2797 SdHoareTripleChecker+Invalid, 2183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-17 22:54:45,907 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2797 Invalid, 2183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2183 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-17 22:54:45,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-03-17 22:54:45,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-03-17 22:54:45,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 80 states have (on average 1.0125) internal successors, (81), 80 states have internal predecessors, (81), 36 states have call successors, (36), 6 states have call predecessors, (36), 4 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-03-17 22:54:45,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 151 transitions. [2022-03-17 22:54:45,917 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 151 transitions. Word has length 233 [2022-03-17 22:54:45,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:54:45,918 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 151 transitions. [2022-03-17 22:54:45,918 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 33 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (33), 32 states have call predecessors, (33), 32 states have call successors, (33) [2022-03-17 22:54:45,918 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 151 transitions. [2022-03-17 22:54:45,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2022-03-17 22:54:45,919 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:54:45,919 INFO L500 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 22:54:45,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-17 22:54:46,119 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:54:46,119 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:54:46,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:54:46,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1893318866, now seen corresponding path program 31 times [2022-03-17 22:54:46,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:54:46,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101246920] [2022-03-17 22:54:46,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:54:46,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:54:46,129 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:54:46,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2012766568] [2022-03-17 22:54:46,129 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-17 22:54:46,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:54:46,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:54:46,130 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 22:54:46,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-17 22:54:46,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 22:54:46,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 132 conjunts are in the unsatisfiable core [2022-03-17 22:54:46,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:54:47,852 INFO L134 CoverageAnalysis]: Checked inductivity of 3536 backedges. 64 proven. 1488 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2022-03-17 22:54:47,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 22:54:48,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:54:48,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101246920] [2022-03-17 22:54:48,059 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:54:48,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012766568] [2022-03-17 22:54:48,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012766568] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 22:54:48,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 22:54:48,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2022-03-17 22:54:48,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998367456] [2022-03-17 22:54:48,059 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 22:54:48,060 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-17 22:54:48,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:54:48,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-17 22:54:48,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2022-03-17 22:54:48,061 INFO L87 Difference]: Start difference. First operand 121 states and 151 transitions. Second operand has 37 states, 36 states have (on average 2.138888888888889) internal successors, (77), 36 states have internal predecessors, (77), 34 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (34), 33 states have call predecessors, (34), 33 states have call successors, (34) [2022-03-17 22:54:49,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:54:49,191 INFO L93 Difference]: Finished difference Result 129 states and 160 transitions. [2022-03-17 22:54:49,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-17 22:54:49,191 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.138888888888889) internal successors, (77), 36 states have internal predecessors, (77), 34 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (34), 33 states have call predecessors, (34), 33 states have call successors, (34) Word has length 240 [2022-03-17 22:54:49,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:54:49,192 INFO L225 Difference]: With dead ends: 129 [2022-03-17 22:54:49,192 INFO L226 Difference]: Without dead ends: 124 [2022-03-17 22:54:49,192 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 213 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=124, Invalid=1598, Unknown=0, NotChecked=0, Total=1722 [2022-03-17 22:54:49,193 INFO L912 BasicCegarLoop]: 115 mSDtfsCounter, 2 mSDsluCounter, 2834 mSDsCounter, 0 mSdLazyCounter, 2317 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2949 SdHoareTripleChecker+Invalid, 2317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-17 22:54:49,193 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2949 Invalid, 2317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2317 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-17 22:54:49,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-03-17 22:54:49,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-03-17 22:54:49,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 82 states have (on average 1.0121951219512195) internal successors, (83), 82 states have internal predecessors, (83), 37 states have call successors, (37), 6 states have call predecessors, (37), 4 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-03-17 22:54:49,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 155 transitions. [2022-03-17 22:54:49,203 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 155 transitions. Word has length 240 [2022-03-17 22:54:49,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:54:49,203 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 155 transitions. [2022-03-17 22:54:49,203 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.138888888888889) internal successors, (77), 36 states have internal predecessors, (77), 34 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (34), 33 states have call predecessors, (34), 33 states have call successors, (34) [2022-03-17 22:54:49,203 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 155 transitions. [2022-03-17 22:54:49,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-03-17 22:54:49,204 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:54:49,204 INFO L500 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 22:54:49,210 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-03-17 22:54:49,410 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-03-17 22:54:49,410 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:54:49,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:54:49,410 INFO L85 PathProgramCache]: Analyzing trace with hash 985158848, now seen corresponding path program 32 times [2022-03-17 22:54:49,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:54:49,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291202272] [2022-03-17 22:54:49,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:54:49,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:54:49,417 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:54:49,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [130473189] [2022-03-17 22:54:49,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 22:54:49,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:54:49,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:54:49,418 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 22:54:49,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-17 22:54:50,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 22:54:50,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 22:54:50,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 137 conjunts are in the unsatisfiable core [2022-03-17 22:54:50,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:54:51,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3762 backedges. 66 proven. 1584 refuted. 0 times theorem prover too weak. 2112 trivial. 0 not checked. [2022-03-17 22:54:51,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 22:54:55,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:54:55,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291202272] [2022-03-17 22:54:55,416 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:54:55,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130473189] [2022-03-17 22:54:55,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130473189] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 22:54:55,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 22:54:55,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2022-03-17 22:54:55,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785480054] [2022-03-17 22:54:55,416 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 22:54:55,416 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-17 22:54:55,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:54:55,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-17 22:54:55,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1172, Invalid=3940, Unknown=0, NotChecked=0, Total=5112 [2022-03-17 22:54:55,418 INFO L87 Difference]: Start difference. First operand 124 states and 155 transitions. Second operand has 38 states, 37 states have (on average 2.135135135135135) internal successors, (79), 37 states have internal predecessors, (79), 35 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (35), 34 states have call predecessors, (35), 34 states have call successors, (35) [2022-03-17 22:54:56,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:54:56,708 INFO L93 Difference]: Finished difference Result 132 states and 164 transitions. [2022-03-17 22:54:56,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-17 22:54:56,708 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.135135135135135) internal successors, (79), 37 states have internal predecessors, (79), 35 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (35), 34 states have call predecessors, (35), 34 states have call successors, (35) Word has length 247 [2022-03-17 22:54:56,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:54:56,709 INFO L225 Difference]: With dead ends: 132 [2022-03-17 22:54:56,709 INFO L226 Difference]: Without dead ends: 127 [2022-03-17 22:54:56,710 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 405 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1182, Invalid=4220, Unknown=0, NotChecked=0, Total=5402 [2022-03-17 22:54:56,710 INFO L912 BasicCegarLoop]: 118 mSDtfsCounter, 2 mSDsluCounter, 2987 mSDsCounter, 0 mSdLazyCounter, 2455 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3105 SdHoareTripleChecker+Invalid, 2455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-17 22:54:56,710 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3105 Invalid, 2455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2455 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-17 22:54:56,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-03-17 22:54:56,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-03-17 22:54:56,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 84 states have (on average 1.0119047619047619) internal successors, (85), 84 states have internal predecessors, (85), 38 states have call successors, (38), 6 states have call predecessors, (38), 4 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-03-17 22:54:56,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 159 transitions. [2022-03-17 22:54:56,721 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 159 transitions. Word has length 247 [2022-03-17 22:54:56,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:54:56,721 INFO L478 AbstractCegarLoop]: Abstraction has 127 states and 159 transitions. [2022-03-17 22:54:56,722 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.135135135135135) internal successors, (79), 37 states have internal predecessors, (79), 35 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (35), 34 states have call predecessors, (35), 34 states have call successors, (35) [2022-03-17 22:54:56,722 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 159 transitions. [2022-03-17 22:54:56,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2022-03-17 22:54:56,722 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:54:56,723 INFO L500 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 22:54:56,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-17 22:54:56,923 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-17 22:54:56,923 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:54:56,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:54:56,924 INFO L85 PathProgramCache]: Analyzing trace with hash 456530194, now seen corresponding path program 33 times [2022-03-17 22:54:56,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:54:56,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124521805] [2022-03-17 22:54:56,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:54:56,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:54:56,932 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:54:56,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [926334259] [2022-03-17 22:54:56,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 22:54:56,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:54:56,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:54:56,933 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 22:54:56,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-17 22:54:59,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2022-03-17 22:54:59,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 22:54:59,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 140 conjunts are in the unsatisfiable core [2022-03-17 22:54:59,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:55:00,506 INFO L134 CoverageAnalysis]: Checked inductivity of 3995 backedges. 68 proven. 1683 refuted. 0 times theorem prover too weak. 2244 trivial. 0 not checked. [2022-03-17 22:55:00,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 22:55:00,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:55:00,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124521805] [2022-03-17 22:55:00,739 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:55:00,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926334259] [2022-03-17 22:55:00,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926334259] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 22:55:00,740 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 22:55:00,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2022-03-17 22:55:00,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444554372] [2022-03-17 22:55:00,740 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 22:55:00,740 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-17 22:55:00,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:55:00,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-17 22:55:00,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2022-03-17 22:55:00,741 INFO L87 Difference]: Start difference. First operand 127 states and 159 transitions. Second operand has 39 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 38 states have internal predecessors, (81), 36 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (36), 35 states have call predecessors, (36), 35 states have call successors, (36) [2022-03-17 22:55:02,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:55:02,033 INFO L93 Difference]: Finished difference Result 135 states and 168 transitions. [2022-03-17 22:55:02,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-17 22:55:02,033 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 38 states have internal predecessors, (81), 36 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (36), 35 states have call predecessors, (36), 35 states have call successors, (36) Word has length 254 [2022-03-17 22:55:02,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:55:02,034 INFO L225 Difference]: With dead ends: 135 [2022-03-17 22:55:02,034 INFO L226 Difference]: Without dead ends: 130 [2022-03-17 22:55:02,034 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 225 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=130, Invalid=1762, Unknown=0, NotChecked=0, Total=1892 [2022-03-17 22:55:02,035 INFO L912 BasicCegarLoop]: 121 mSDtfsCounter, 2 mSDsluCounter, 3144 mSDsCounter, 0 mSdLazyCounter, 2597 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3265 SdHoareTripleChecker+Invalid, 2597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-17 22:55:02,035 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3265 Invalid, 2597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2597 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-17 22:55:02,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-03-17 22:55:02,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2022-03-17 22:55:02,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 86 states have (on average 1.0116279069767442) internal successors, (87), 86 states have internal predecessors, (87), 39 states have call successors, (39), 6 states have call predecessors, (39), 4 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-17 22:55:02,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 163 transitions. [2022-03-17 22:55:02,045 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 163 transitions. Word has length 254 [2022-03-17 22:55:02,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:55:02,046 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 163 transitions. [2022-03-17 22:55:02,046 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 38 states have internal predecessors, (81), 36 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (36), 35 states have call predecessors, (36), 35 states have call successors, (36) [2022-03-17 22:55:02,046 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 163 transitions. [2022-03-17 22:55:02,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2022-03-17 22:55:02,047 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:55:02,047 INFO L500 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 22:55:02,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-17 22:55:02,247 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-17 22:55:02,247 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:55:02,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:55:02,248 INFO L85 PathProgramCache]: Analyzing trace with hash -795593600, now seen corresponding path program 34 times [2022-03-17 22:55:02,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:55:02,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885185511] [2022-03-17 22:55:02,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:55:02,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:55:02,255 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:55:02,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1496744357] [2022-03-17 22:55:02,255 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-17 22:55:02,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:55:02,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:55:02,256 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 22:55:02,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-17 22:55:03,078 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-17 22:55:03,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 22:55:03,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 144 conjunts are in the unsatisfiable core [2022-03-17 22:55:03,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:55:04,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4235 backedges. 70 proven. 1785 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2022-03-17 22:55:04,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 22:55:04,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:55:04,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885185511] [2022-03-17 22:55:04,360 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:55:04,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496744357] [2022-03-17 22:55:04,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496744357] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 22:55:04,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 22:55:04,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2022-03-17 22:55:04,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081441894] [2022-03-17 22:55:04,361 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 22:55:04,361 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-17 22:55:04,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:55:04,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-17 22:55:04,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2022-03-17 22:55:04,362 INFO L87 Difference]: Start difference. First operand 130 states and 163 transitions. Second operand has 40 states, 39 states have (on average 2.128205128205128) internal successors, (83), 39 states have internal predecessors, (83), 37 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (37), 36 states have call predecessors, (37), 36 states have call successors, (37) [2022-03-17 22:55:05,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:55:05,704 INFO L93 Difference]: Finished difference Result 138 states and 172 transitions. [2022-03-17 22:55:05,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-17 22:55:05,705 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.128205128205128) internal successors, (83), 39 states have internal predecessors, (83), 37 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (37), 36 states have call predecessors, (37), 36 states have call successors, (37) Word has length 261 [2022-03-17 22:55:05,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:55:05,706 INFO L225 Difference]: With dead ends: 138 [2022-03-17 22:55:05,706 INFO L226 Difference]: Without dead ends: 133 [2022-03-17 22:55:05,706 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 231 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=133, Invalid=1847, Unknown=0, NotChecked=0, Total=1980 [2022-03-17 22:55:05,707 INFO L912 BasicCegarLoop]: 124 mSDtfsCounter, 2 mSDsluCounter, 3305 mSDsCounter, 0 mSdLazyCounter, 2743 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3429 SdHoareTripleChecker+Invalid, 2743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-17 22:55:05,707 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3429 Invalid, 2743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2743 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-17 22:55:05,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-03-17 22:55:05,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2022-03-17 22:55:05,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 88 states have (on average 1.0113636363636365) internal successors, (89), 88 states have internal predecessors, (89), 40 states have call successors, (40), 6 states have call predecessors, (40), 4 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-03-17 22:55:05,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 167 transitions. [2022-03-17 22:55:05,717 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 167 transitions. Word has length 261 [2022-03-17 22:55:05,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:55:05,718 INFO L478 AbstractCegarLoop]: Abstraction has 133 states and 167 transitions. [2022-03-17 22:55:05,718 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.128205128205128) internal successors, (83), 39 states have internal predecessors, (83), 37 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (37), 36 states have call predecessors, (37), 36 states have call successors, (37) [2022-03-17 22:55:05,718 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 167 transitions. [2022-03-17 22:55:05,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2022-03-17 22:55:05,719 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:55:05,719 INFO L500 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 36, 36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 22:55:05,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-17 22:55:05,924 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:55:05,925 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:55:05,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:55:05,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1475543378, now seen corresponding path program 35 times [2022-03-17 22:55:05,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:55:05,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112932711] [2022-03-17 22:55:05,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:55:05,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:55:05,932 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:55:05,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1650803783] [2022-03-17 22:55:05,932 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-17 22:55:05,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:55:05,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:55:05,933 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 22:55:05,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-17 22:55:32,530 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2022-03-17 22:55:32,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 22:55:32,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 148 conjunts are in the unsatisfiable core [2022-03-17 22:55:32,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:55:33,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4482 backedges. 72 proven. 1890 refuted. 0 times theorem prover too weak. 2520 trivial. 0 not checked. [2022-03-17 22:55:33,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 22:55:33,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:55:33,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112932711] [2022-03-17 22:55:33,824 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:55:33,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650803783] [2022-03-17 22:55:33,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650803783] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 22:55:33,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 22:55:33,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2022-03-17 22:55:33,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908648263] [2022-03-17 22:55:33,825 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 22:55:33,825 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-17 22:55:33,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:55:33,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-17 22:55:33,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2022-03-17 22:55:33,826 INFO L87 Difference]: Start difference. First operand 133 states and 167 transitions. Second operand has 41 states, 40 states have (on average 2.125) internal successors, (85), 40 states have internal predecessors, (85), 38 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (38), 37 states have call predecessors, (38), 37 states have call successors, (38) [2022-03-17 22:55:35,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:55:35,216 INFO L93 Difference]: Finished difference Result 141 states and 176 transitions. [2022-03-17 22:55:35,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-17 22:55:35,217 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.125) internal successors, (85), 40 states have internal predecessors, (85), 38 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (38), 37 states have call predecessors, (38), 37 states have call successors, (38) Word has length 268 [2022-03-17 22:55:35,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:55:35,217 INFO L225 Difference]: With dead ends: 141 [2022-03-17 22:55:35,218 INFO L226 Difference]: Without dead ends: 136 [2022-03-17 22:55:35,218 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 237 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=136, Invalid=1934, Unknown=0, NotChecked=0, Total=2070 [2022-03-17 22:55:35,218 INFO L912 BasicCegarLoop]: 127 mSDtfsCounter, 2 mSDsluCounter, 3470 mSDsCounter, 0 mSdLazyCounter, 2893 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3597 SdHoareTripleChecker+Invalid, 2893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-17 22:55:35,218 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3597 Invalid, 2893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2893 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-17 22:55:35,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-03-17 22:55:35,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2022-03-17 22:55:35,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 90 states have (on average 1.011111111111111) internal successors, (91), 90 states have internal predecessors, (91), 41 states have call successors, (41), 6 states have call predecessors, (41), 4 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2022-03-17 22:55:35,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 171 transitions. [2022-03-17 22:55:35,229 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 171 transitions. Word has length 268 [2022-03-17 22:55:35,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:55:35,229 INFO L478 AbstractCegarLoop]: Abstraction has 136 states and 171 transitions. [2022-03-17 22:55:35,229 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.125) internal successors, (85), 40 states have internal predecessors, (85), 38 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (38), 37 states have call predecessors, (38), 37 states have call successors, (38) [2022-03-17 22:55:35,229 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 171 transitions. [2022-03-17 22:55:35,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-03-17 22:55:35,230 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:55:35,230 INFO L500 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 37, 37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 22:55:35,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-17 22:55:35,443 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-17 22:55:35,444 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:55:35,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:55:35,444 INFO L85 PathProgramCache]: Analyzing trace with hash 290292800, now seen corresponding path program 36 times [2022-03-17 22:55:35,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:55:35,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049314210] [2022-03-17 22:55:35,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:55:35,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:55:35,451 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:55:35,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [337084765] [2022-03-17 22:55:35,451 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-17 22:55:35,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:55:35,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:55:35,452 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 22:55:35,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-17 22:55:54,795 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2022-03-17 22:55:54,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 22:55:54,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 153 conjunts are in the unsatisfiable core [2022-03-17 22:55:54,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:55:56,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4736 backedges. 74 proven. 1998 refuted. 0 times theorem prover too weak. 2664 trivial. 0 not checked. [2022-03-17 22:55:56,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 22:56:00,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:56:00,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049314210] [2022-03-17 22:56:00,919 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:56:00,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337084765] [2022-03-17 22:56:00,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337084765] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 22:56:00,919 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 22:56:00,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2022-03-17 22:56:00,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321466294] [2022-03-17 22:56:00,919 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 22:56:00,935 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-17 22:56:00,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:56:00,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-17 22:56:00,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1460, Invalid=4860, Unknown=0, NotChecked=0, Total=6320 [2022-03-17 22:56:00,936 INFO L87 Difference]: Start difference. First operand 136 states and 171 transitions. Second operand has 42 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 41 states have internal predecessors, (87), 39 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (39), 38 states have call predecessors, (39), 38 states have call successors, (39) [2022-03-17 22:56:02,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:56:02,495 INFO L93 Difference]: Finished difference Result 144 states and 180 transitions. [2022-03-17 22:56:02,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-17 22:56:02,495 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 41 states have internal predecessors, (87), 39 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (39), 38 states have call predecessors, (39), 38 states have call successors, (39) Word has length 275 [2022-03-17 22:56:02,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:56:02,496 INFO L225 Difference]: With dead ends: 144 [2022-03-17 22:56:02,496 INFO L226 Difference]: Without dead ends: 139 [2022-03-17 22:56:02,496 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 453 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1470, Invalid=5172, Unknown=0, NotChecked=0, Total=6642 [2022-03-17 22:56:02,497 INFO L912 BasicCegarLoop]: 130 mSDtfsCounter, 2 mSDsluCounter, 3639 mSDsCounter, 0 mSdLazyCounter, 3047 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3769 SdHoareTripleChecker+Invalid, 3047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-17 22:56:02,497 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3769 Invalid, 3047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3047 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-17 22:56:02,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-03-17 22:56:02,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2022-03-17 22:56:02,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 92 states have (on average 1.0108695652173914) internal successors, (93), 92 states have internal predecessors, (93), 42 states have call successors, (42), 6 states have call predecessors, (42), 4 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-03-17 22:56:02,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 175 transitions. [2022-03-17 22:56:02,508 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 175 transitions. Word has length 275 [2022-03-17 22:56:02,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:56:02,508 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 175 transitions. [2022-03-17 22:56:02,508 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 41 states have internal predecessors, (87), 39 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (39), 38 states have call predecessors, (39), 38 states have call successors, (39) [2022-03-17 22:56:02,508 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 175 transitions. [2022-03-17 22:56:02,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2022-03-17 22:56:02,509 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:56:02,509 INFO L500 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 38, 38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 22:56:02,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-17 22:56:02,723 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-17 22:56:02,724 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:56:02,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:56:02,724 INFO L85 PathProgramCache]: Analyzing trace with hash -355173998, now seen corresponding path program 37 times [2022-03-17 22:56:02,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:56:02,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45485235] [2022-03-17 22:56:02,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:56:02,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:56:02,731 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:56:02,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1905403215] [2022-03-17 22:56:02,731 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-17 22:56:02,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:56:02,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:56:02,732 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 22:56:02,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-17 22:56:03,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 22:56:03,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 156 conjunts are in the unsatisfiable core [2022-03-17 22:56:03,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:56:05,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4997 backedges. 76 proven. 2109 refuted. 0 times theorem prover too weak. 2812 trivial. 0 not checked. [2022-03-17 22:56:05,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 22:56:05,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:56:05,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45485235] [2022-03-17 22:56:05,393 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:56:05,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905403215] [2022-03-17 22:56:05,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905403215] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 22:56:05,393 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 22:56:05,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2022-03-17 22:56:05,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677898808] [2022-03-17 22:56:05,394 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 22:56:05,394 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-17 22:56:05,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:56:05,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-17 22:56:05,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1938, Unknown=0, NotChecked=0, Total=2070 [2022-03-17 22:56:05,395 INFO L87 Difference]: Start difference. First operand 139 states and 175 transitions. Second operand has 43 states, 42 states have (on average 2.119047619047619) internal successors, (89), 42 states have internal predecessors, (89), 40 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (40), 39 states have call predecessors, (40), 39 states have call successors, (40) [2022-03-17 22:56:06,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:56:06,969 INFO L93 Difference]: Finished difference Result 147 states and 184 transitions. [2022-03-17 22:56:06,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-17 22:56:06,970 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.119047619047619) internal successors, (89), 42 states have internal predecessors, (89), 40 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (40), 39 states have call predecessors, (40), 39 states have call successors, (40) Word has length 282 [2022-03-17 22:56:06,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:56:06,970 INFO L225 Difference]: With dead ends: 147 [2022-03-17 22:56:06,970 INFO L226 Difference]: Without dead ends: 142 [2022-03-17 22:56:06,971 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 249 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=142, Invalid=2114, Unknown=0, NotChecked=0, Total=2256 [2022-03-17 22:56:06,971 INFO L912 BasicCegarLoop]: 133 mSDtfsCounter, 2 mSDsluCounter, 3812 mSDsCounter, 0 mSdLazyCounter, 3205 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3945 SdHoareTripleChecker+Invalid, 3205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-17 22:56:06,971 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3945 Invalid, 3205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3205 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-17 22:56:06,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-03-17 22:56:06,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2022-03-17 22:56:06,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 94 states have (on average 1.0106382978723405) internal successors, (95), 94 states have internal predecessors, (95), 43 states have call successors, (43), 6 states have call predecessors, (43), 4 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2022-03-17 22:56:06,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 179 transitions. [2022-03-17 22:56:06,982 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 179 transitions. Word has length 282 [2022-03-17 22:56:06,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:56:06,983 INFO L478 AbstractCegarLoop]: Abstraction has 142 states and 179 transitions. [2022-03-17 22:56:06,983 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.119047619047619) internal successors, (89), 42 states have internal predecessors, (89), 40 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (40), 39 states have call predecessors, (40), 39 states have call successors, (40) [2022-03-17 22:56:06,983 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 179 transitions. [2022-03-17 22:56:06,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2022-03-17 22:56:06,984 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:56:06,984 INFO L500 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 39, 39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 22:56:06,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-17 22:56:07,184 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-17 22:56:07,185 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:56:07,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:56:07,185 INFO L85 PathProgramCache]: Analyzing trace with hash 882918400, now seen corresponding path program 38 times [2022-03-17 22:56:07,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:56:07,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972954630] [2022-03-17 22:56:07,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:56:07,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:56:07,192 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:56:07,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1908385660] [2022-03-17 22:56:07,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 22:56:07,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:56:07,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:56:07,193 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 22:56:07,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-17 22:56:08,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 22:56:08,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 22:56:08,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 724 conjuncts, 160 conjunts are in the unsatisfiable core [2022-03-17 22:56:08,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:56:09,752 INFO L134 CoverageAnalysis]: Checked inductivity of 5265 backedges. 78 proven. 2223 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked. [2022-03-17 22:56:09,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 22:56:10,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:56:10,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972954630] [2022-03-17 22:56:10,006 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:56:10,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908385660] [2022-03-17 22:56:10,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908385660] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 22:56:10,006 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 22:56:10,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2022-03-17 22:56:10,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500603214] [2022-03-17 22:56:10,006 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 22:56:10,007 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-17 22:56:10,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:56:10,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-17 22:56:10,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2027, Unknown=0, NotChecked=0, Total=2162 [2022-03-17 22:56:10,008 INFO L87 Difference]: Start difference. First operand 142 states and 179 transitions. Second operand has 44 states, 43 states have (on average 2.116279069767442) internal successors, (91), 43 states have internal predecessors, (91), 41 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (41), 40 states have call predecessors, (41), 40 states have call successors, (41) [2022-03-17 22:56:11,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:56:11,656 INFO L93 Difference]: Finished difference Result 150 states and 188 transitions. [2022-03-17 22:56:11,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-17 22:56:11,656 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.116279069767442) internal successors, (91), 43 states have internal predecessors, (91), 41 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (41), 40 states have call predecessors, (41), 40 states have call successors, (41) Word has length 289 [2022-03-17 22:56:11,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:56:11,657 INFO L225 Difference]: With dead ends: 150 [2022-03-17 22:56:11,657 INFO L226 Difference]: Without dead ends: 145 [2022-03-17 22:56:11,657 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 255 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=145, Invalid=2207, Unknown=0, NotChecked=0, Total=2352 [2022-03-17 22:56:11,657 INFO L912 BasicCegarLoop]: 136 mSDtfsCounter, 2 mSDsluCounter, 3989 mSDsCounter, 0 mSdLazyCounter, 3367 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4125 SdHoareTripleChecker+Invalid, 3367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-17 22:56:11,658 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 4125 Invalid, 3367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3367 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-17 22:56:11,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-03-17 22:56:11,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2022-03-17 22:56:11,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 96 states have (on average 1.0104166666666667) internal successors, (97), 96 states have internal predecessors, (97), 44 states have call successors, (44), 6 states have call predecessors, (44), 4 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2022-03-17 22:56:11,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 183 transitions. [2022-03-17 22:56:11,669 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 183 transitions. Word has length 289 [2022-03-17 22:56:11,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:56:11,669 INFO L478 AbstractCegarLoop]: Abstraction has 145 states and 183 transitions. [2022-03-17 22:56:11,669 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.116279069767442) internal successors, (91), 43 states have internal predecessors, (91), 41 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (41), 40 states have call predecessors, (41), 40 states have call successors, (41) [2022-03-17 22:56:11,669 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 183 transitions. [2022-03-17 22:56:11,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2022-03-17 22:56:11,670 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:56:11,670 INFO L500 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 40, 40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 22:56:11,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-17 22:56:11,878 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-03-17 22:56:11,878 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:56:11,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:56:11,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1331789358, now seen corresponding path program 39 times [2022-03-17 22:56:11,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:56:11,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324010359] [2022-03-17 22:56:11,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:56:11,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:56:11,885 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:56:11,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1746161837] [2022-03-17 22:56:11,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 22:56:11,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:56:11,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:56:11,886 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 22:56:11,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-17 22:56:45,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2022-03-17 22:56:45,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 22:56:45,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 164 conjunts are in the unsatisfiable core [2022-03-17 22:56:45,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:56:46,750 INFO L134 CoverageAnalysis]: Checked inductivity of 5540 backedges. 80 proven. 2340 refuted. 0 times theorem prover too weak. 3120 trivial. 0 not checked. [2022-03-17 22:56:46,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 22:56:47,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:56:47,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324010359] [2022-03-17 22:56:47,040 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:56:47,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746161837] [2022-03-17 22:56:47,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746161837] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 22:56:47,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 22:56:47,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2022-03-17 22:56:47,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235830974] [2022-03-17 22:56:47,040 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 22:56:47,040 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-17 22:56:47,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:56:47,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-17 22:56:47,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2118, Unknown=0, NotChecked=0, Total=2256 [2022-03-17 22:56:47,041 INFO L87 Difference]: Start difference. First operand 145 states and 183 transitions. Second operand has 45 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 44 states have internal predecessors, (93), 42 states have call successors, (44), 2 states have call predecessors, (44), 1 states have return successors, (42), 41 states have call predecessors, (42), 41 states have call successors, (42) [2022-03-17 22:56:48,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:56:48,772 INFO L93 Difference]: Finished difference Result 153 states and 192 transitions. [2022-03-17 22:56:48,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-17 22:56:48,773 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 44 states have internal predecessors, (93), 42 states have call successors, (44), 2 states have call predecessors, (44), 1 states have return successors, (42), 41 states have call predecessors, (42), 41 states have call successors, (42) Word has length 296 [2022-03-17 22:56:48,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:56:48,774 INFO L225 Difference]: With dead ends: 153 [2022-03-17 22:56:48,774 INFO L226 Difference]: Without dead ends: 148 [2022-03-17 22:56:48,774 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 261 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=148, Invalid=2302, Unknown=0, NotChecked=0, Total=2450 [2022-03-17 22:56:48,774 INFO L912 BasicCegarLoop]: 139 mSDtfsCounter, 2 mSDsluCounter, 4170 mSDsCounter, 0 mSdLazyCounter, 3533 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4309 SdHoareTripleChecker+Invalid, 3533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-17 22:56:48,774 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 4309 Invalid, 3533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3533 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-17 22:56:48,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-03-17 22:56:48,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2022-03-17 22:56:48,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 98 states have (on average 1.010204081632653) internal successors, (99), 98 states have internal predecessors, (99), 45 states have call successors, (45), 6 states have call predecessors, (45), 4 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2022-03-17 22:56:48,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 187 transitions. [2022-03-17 22:56:48,786 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 187 transitions. Word has length 296 [2022-03-17 22:56:48,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:56:48,786 INFO L478 AbstractCegarLoop]: Abstraction has 148 states and 187 transitions. [2022-03-17 22:56:48,787 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 44 states have internal predecessors, (93), 42 states have call successors, (44), 2 states have call predecessors, (44), 1 states have return successors, (42), 41 states have call predecessors, (42), 41 states have call successors, (42) [2022-03-17 22:56:48,787 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 187 transitions. [2022-03-17 22:56:48,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2022-03-17 22:56:48,788 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:56:48,788 INFO L500 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 41, 41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 22:56:48,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-17 22:56:49,003 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:56:49,003 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:56:49,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:56:49,004 INFO L85 PathProgramCache]: Analyzing trace with hash 961049536, now seen corresponding path program 40 times [2022-03-17 22:56:49,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:56:49,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546780681] [2022-03-17 22:56:49,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:56:49,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:56:49,011 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:56:49,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1790711346] [2022-03-17 22:56:49,011 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-17 22:56:49,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:56:49,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:56:49,012 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 22:56:49,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-17 22:56:50,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-17 22:56:50,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 22:56:50,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 168 conjunts are in the unsatisfiable core [2022-03-17 22:56:50,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:56:51,492 INFO L134 CoverageAnalysis]: Checked inductivity of 5822 backedges. 82 proven. 2460 refuted. 0 times theorem prover too weak. 3280 trivial. 0 not checked. [2022-03-17 22:56:51,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 22:56:51,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:56:51,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546780681] [2022-03-17 22:56:51,755 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:56:51,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790711346] [2022-03-17 22:56:51,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790711346] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 22:56:51,755 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 22:56:51,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2022-03-17 22:56:51,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427444406] [2022-03-17 22:56:51,756 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 22:56:51,756 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-17 22:56:51,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:56:51,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-17 22:56:51,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2022-03-17 22:56:51,757 INFO L87 Difference]: Start difference. First operand 148 states and 187 transitions. Second operand has 46 states, 45 states have (on average 2.111111111111111) internal successors, (95), 45 states have internal predecessors, (95), 43 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (43), 42 states have call predecessors, (43), 42 states have call successors, (43) [2022-03-17 22:56:53,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:56:53,572 INFO L93 Difference]: Finished difference Result 156 states and 196 transitions. [2022-03-17 22:56:53,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-17 22:56:53,572 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.111111111111111) internal successors, (95), 45 states have internal predecessors, (95), 43 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (43), 42 states have call predecessors, (43), 42 states have call successors, (43) Word has length 303 [2022-03-17 22:56:53,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:56:53,573 INFO L225 Difference]: With dead ends: 156 [2022-03-17 22:56:53,573 INFO L226 Difference]: Without dead ends: 151 [2022-03-17 22:56:53,574 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 267 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=151, Invalid=2399, Unknown=0, NotChecked=0, Total=2550 [2022-03-17 22:56:53,574 INFO L912 BasicCegarLoop]: 142 mSDtfsCounter, 2 mSDsluCounter, 4355 mSDsCounter, 0 mSdLazyCounter, 3703 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4497 SdHoareTripleChecker+Invalid, 3703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-17 22:56:53,574 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 4497 Invalid, 3703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3703 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-17 22:56:53,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-03-17 22:56:53,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2022-03-17 22:56:53,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 100 states have (on average 1.01) internal successors, (101), 100 states have internal predecessors, (101), 46 states have call successors, (46), 6 states have call predecessors, (46), 4 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-03-17 22:56:53,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 191 transitions. [2022-03-17 22:56:53,587 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 191 transitions. Word has length 303 [2022-03-17 22:56:53,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:56:53,587 INFO L478 AbstractCegarLoop]: Abstraction has 151 states and 191 transitions. [2022-03-17 22:56:53,587 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.111111111111111) internal successors, (95), 45 states have internal predecessors, (95), 43 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (43), 42 states have call predecessors, (43), 42 states have call successors, (43) [2022-03-17 22:56:53,587 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 191 transitions. [2022-03-17 22:56:53,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2022-03-17 22:56:53,588 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:56:53,588 INFO L500 BasicCegarLoop]: trace histogram [43, 42, 42, 42, 42, 42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 22:56:53,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-17 22:56:53,795 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:56:53,795 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:56:53,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:56:53,795 INFO L85 PathProgramCache]: Analyzing trace with hash -552265198, now seen corresponding path program 41 times [2022-03-17 22:56:53,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:56:53,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690630143] [2022-03-17 22:56:53,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:56:53,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:56:53,802 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:56:53,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1417491986] [2022-03-17 22:56:53,803 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-17 22:56:53,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:56:53,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:56:53,804 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 22:56:53,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process