/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/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-18 04:16:43,952 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 04:16:43,953 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 04:16:44,017 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 04:16:44,051 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 04:16:44,052 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 04:16:44,053 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 04:16:44,054 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-18 04:16:44,061 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 04:16:44,062 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 04:16:44,063 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 04:16:44,063 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 04:16:44,064 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 04:16:44,064 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 04:16:44,064 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 04:16:44,064 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 04:16:44,064 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 04:16:44,064 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 04:16:44,065 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 04:16:44,065 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 04:16:44,065 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 04:16:44,065 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 04:16:44,065 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 04:16:44,065 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 04:16:44,065 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 04:16:44,065 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-18 04:16:44,065 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-18 04:16:44,065 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-18 04:16:44,065 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 04:16:44,066 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-18 04:16:44,066 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 04:16:44,262 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 04:16:44,281 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 04:16:44,283 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 04:16:44,284 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 04:16:44,285 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 04:16:44,286 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound10.c [2022-03-18 04:16:44,338 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0067bc7e0/3fc8f36b53dc42dcac16347455aa186a/FLAGff6a9301c [2022-03-18 04:16:44,741 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 04:16:44,741 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound10.c [2022-03-18 04:16:44,745 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0067bc7e0/3fc8f36b53dc42dcac16347455aa186a/FLAGff6a9301c [2022-03-18 04:16:44,757 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0067bc7e0/3fc8f36b53dc42dcac16347455aa186a [2022-03-18 04:16:44,759 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 04:16:44,760 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 04:16:44,761 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 04:16:44,761 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 04:16:44,763 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 04:16:44,763 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 04:16:44" (1/1) ... [2022-03-18 04:16:44,764 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7144ce87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:16:44, skipping insertion in model container [2022-03-18 04:16:44,764 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 04:16:44" (1/1) ... [2022-03-18 04:16:44,768 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 04:16:44,776 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 04:16:44,912 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/prodbin-ll_valuebound10.c[537,550] [2022-03-18 04:16:44,925 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 04:16:44,930 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 04:16:44,939 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/prodbin-ll_valuebound10.c[537,550] [2022-03-18 04:16:44,951 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 04:16:44,959 INFO L208 MainTranslator]: Completed translation [2022-03-18 04:16:44,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:16:44 WrapperNode [2022-03-18 04:16:44,959 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 04:16:44,961 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 04:16:44,961 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 04:16:44,962 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 04:16:44,969 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:16:44" (1/1) ... [2022-03-18 04:16:44,969 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:16:44" (1/1) ... [2022-03-18 04:16:44,975 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:16:44" (1/1) ... [2022-03-18 04:16:44,975 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:16:44" (1/1) ... [2022-03-18 04:16:44,985 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:16:44" (1/1) ... [2022-03-18 04:16:44,988 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:16:44" (1/1) ... [2022-03-18 04:16:44,990 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:16:44" (1/1) ... [2022-03-18 04:16:44,994 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 04:16:44,995 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 04:16:44,995 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 04:16:44,995 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 04:16:44,995 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:16:44" (1/1) ... [2022-03-18 04:16:45,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 04:16:45,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:16:45,032 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) [2022-03-18 04:16:45,049 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 [2022-03-18 04:16:45,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 04:16:45,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 04:16:45,064 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 04:16:45,064 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 04:16:45,064 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 04:16:45,065 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 04:16:45,065 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 04:16:45,065 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 04:16:45,065 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 04:16:45,065 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 04:16:45,065 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 04:16:45,065 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 04:16:45,066 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 04:16:45,066 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 04:16:45,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 04:16:45,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 04:16:45,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 04:16:45,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 04:16:45,067 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 04:16:45,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 04:16:45,114 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 04:16:45,115 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 04:16:45,200 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 04:16:45,204 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 04:16:45,204 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-18 04:16:45,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 04:16:45 BoogieIcfgContainer [2022-03-18 04:16:45,205 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 04:16:45,206 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 04:16:45,206 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 04:16:45,211 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 04:16:45,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 04:16:44" (1/3) ... [2022-03-18 04:16:45,212 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e8056c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 04:16:45, skipping insertion in model container [2022-03-18 04:16:45,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:16:44" (2/3) ... [2022-03-18 04:16:45,212 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e8056c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 04:16:45, skipping insertion in model container [2022-03-18 04:16:45,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 04:16:45" (3/3) ... [2022-03-18 04:16:45,213 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound10.c [2022-03-18 04:16:45,216 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-18 04:16:45,216 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 04:16:45,252 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 04:16:45,262 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2022-03-18 04:16:45,262 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 04:16:45,274 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 04:16:45,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-18 04:16:45,286 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:16:45,287 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:16:45,287 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:16:45,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:16:45,291 INFO L85 PathProgramCache]: Analyzing trace with hash -589322634, now seen corresponding path program 1 times [2022-03-18 04:16:45,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:16:45,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1022514578] [2022-03-18 04:16:45,303 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:16:45,304 INFO L85 PathProgramCache]: Analyzing trace with hash -589322634, now seen corresponding path program 2 times [2022-03-18 04:16:45,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:16:45,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129493467] [2022-03-18 04:16:45,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:16:45,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:16:45,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 04:16:45,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 04:16:45,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 04:16:45,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 04:16:45,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 04:16:45,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 04:16:45,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 04:16:45,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-18 04:16:45,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 04:16:45,464 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 04:16:45,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:16:45,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129493467] [2022-03-18 04:16:45,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129493467] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:16:45,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:16:45,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 04:16:45,470 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:16:45,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1022514578] [2022-03-18 04:16:45,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1022514578] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:16:45,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:16:45,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 04:16:45,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894868400] [2022-03-18 04:16:45,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:16:45,475 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 04:16:45,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:16:45,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 04:16:45,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 04:16:45,497 INFO L87 Difference]: Start difference. First operand has 32 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 04:16:45,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:16:45,542 INFO L93 Difference]: Finished difference Result 57 states and 77 transitions. [2022-03-18 04:16:45,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 04:16:45,544 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-03-18 04:16:45,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:16:45,548 INFO L225 Difference]: With dead ends: 57 [2022-03-18 04:16:45,549 INFO L226 Difference]: Without dead ends: 27 [2022-03-18 04:16:45,550 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 04:16:45,553 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 04:16:45,553 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 34 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 04:16:45,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-18 04:16:45,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-03-18 04:16:45,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-18 04:16:45,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-03-18 04:16:45,590 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 28 [2022-03-18 04:16:45,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:16:45,591 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-03-18 04:16:45,591 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 04:16:45,591 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-03-18 04:16:45,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-18 04:16:45,592 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:16:45,592 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:16:45,592 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 04:16:45,593 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:16:45,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:16:45,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1736242504, now seen corresponding path program 1 times [2022-03-18 04:16:45,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:16:45,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [570456569] [2022-03-18 04:16:45,594 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:16:45,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1736242504, now seen corresponding path program 2 times [2022-03-18 04:16:45,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:16:45,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23035271] [2022-03-18 04:16:45,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:16:45,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:16:45,625 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:16:45,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1527067627] [2022-03-18 04:16:45,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 04:16:45,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:16:45,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:16:45,628 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) [2022-03-18 04:16:45,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 04:16:45,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-18 04:16:45,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:16:45,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 04:16:45,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:16:45,785 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 04:16:45,785 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 04:16:45,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:16:45,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23035271] [2022-03-18 04:16:45,785 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:16:45,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527067627] [2022-03-18 04:16:45,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527067627] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:16:45,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:16:45,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 04:16:45,786 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:16:45,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [570456569] [2022-03-18 04:16:45,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [570456569] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:16:45,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:16:45,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 04:16:45,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015432238] [2022-03-18 04:16:45,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:16:45,787 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 04:16:45,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:16:45,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 04:16:45,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 04:16:45,788 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-18 04:16:45,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:16:45,824 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2022-03-18 04:16:45,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 04:16:45,824 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-03-18 04:16:45,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:16:45,825 INFO L225 Difference]: With dead ends: 39 [2022-03-18 04:16:45,825 INFO L226 Difference]: Without dead ends: 37 [2022-03-18 04:16:45,825 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 04:16:45,826 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 8 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 04:16:45,827 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 94 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 04:16:45,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-18 04:16:45,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2022-03-18 04:16:45,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-18 04:16:45,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-03-18 04:16:45,833 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 28 [2022-03-18 04:16:45,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:16:45,833 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-03-18 04:16:45,833 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-18 04:16:45,834 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-03-18 04:16:45,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-18 04:16:45,834 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:16:45,834 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:16:45,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 04:16:46,053 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 [2022-03-18 04:16:46,053 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:16:46,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:16:46,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1911690432, now seen corresponding path program 1 times [2022-03-18 04:16:46,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:16:46,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [838982488] [2022-03-18 04:16:46,055 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:16:46,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1911690432, now seen corresponding path program 2 times [2022-03-18 04:16:46,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:16:46,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508994825] [2022-03-18 04:16:46,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:16:46,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:16:46,072 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:16:46,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [221118394] [2022-03-18 04:16:46,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 04:16:46,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:16:46,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:16:46,075 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) [2022-03-18 04:16:46,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 04:16:46,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 04:16:46,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:16:46,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 04:16:46,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:16:46,204 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 04:16:46,204 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 04:16:46,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:16:46,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508994825] [2022-03-18 04:16:46,204 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:16:46,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221118394] [2022-03-18 04:16:46,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221118394] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:16:46,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:16:46,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 04:16:46,205 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:16:46,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [838982488] [2022-03-18 04:16:46,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [838982488] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:16:46,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:16:46,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 04:16:46,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480673316] [2022-03-18 04:16:46,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:16:46,206 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 04:16:46,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:16:46,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 04:16:46,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 04:16:46,209 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 04:16:46,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:16:46,274 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2022-03-18 04:16:46,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 04:16:46,275 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-03-18 04:16:46,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:16:46,277 INFO L225 Difference]: With dead ends: 43 [2022-03-18 04:16:46,277 INFO L226 Difference]: Without dead ends: 36 [2022-03-18 04:16:46,278 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-18 04:16:46,285 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 14 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 04:16:46,287 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 99 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 04:16:46,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-18 04:16:46,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2022-03-18 04:16:46,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-18 04:16:46,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-03-18 04:16:46,301 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 34 [2022-03-18 04:16:46,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:16:46,301 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-03-18 04:16:46,301 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 04:16:46,301 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-03-18 04:16:46,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-18 04:16:46,302 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:16:46,302 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:16:46,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 04:16:46,509 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 [2022-03-18 04:16:46,510 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:16:46,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:16:46,511 INFO L85 PathProgramCache]: Analyzing trace with hash 2022075506, now seen corresponding path program 1 times [2022-03-18 04:16:46,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:16:46,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [58121362] [2022-03-18 04:16:46,511 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:16:46,511 INFO L85 PathProgramCache]: Analyzing trace with hash 2022075506, now seen corresponding path program 2 times [2022-03-18 04:16:46,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:16:46,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162796843] [2022-03-18 04:16:46,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:16:46,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:16:46,536 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:16:46,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1165197106] [2022-03-18 04:16:46,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 04:16:46,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:16:46,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:16:46,551 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) [2022-03-18 04:16:46,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 04:16:46,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 04:16:46,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:16:46,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-18 04:16:46,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:16:46,968 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 04:16:46,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:16:56,202 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 04:16:56,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:16:56,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162796843] [2022-03-18 04:16:56,202 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:16:56,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165197106] [2022-03-18 04:16:56,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165197106] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:16:56,205 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:16:56,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2022-03-18 04:16:56,208 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:16:56,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [58121362] [2022-03-18 04:16:56,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [58121362] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:16:56,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:16:56,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 04:16:56,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623049192] [2022-03-18 04:16:56,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:16:56,212 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 04:16:56,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:16:56,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 04:16:56,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=142, Unknown=2, NotChecked=0, Total=182 [2022-03-18 04:16:56,212 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 04:16:58,268 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 04:16:58,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:16:58,679 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2022-03-18 04:16:58,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 04:16:58,680 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2022-03-18 04:16:58,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:16:58,681 INFO L225 Difference]: With dead ends: 49 [2022-03-18 04:16:58,681 INFO L226 Difference]: Without dead ends: 47 [2022-03-18 04:16:58,681 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=51, Invalid=187, Unknown=2, NotChecked=0, Total=240 [2022-03-18 04:16:58,681 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 16 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-18 04:16:58,682 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 190 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 146 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-03-18 04:16:58,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-18 04:16:58,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 42. [2022-03-18 04:16:58,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 29 states have internal predecessors, (31), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 04:16:58,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2022-03-18 04:16:58,689 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 37 [2022-03-18 04:16:58,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:16:58,689 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2022-03-18 04:16:58,689 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 04:16:58,689 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2022-03-18 04:16:58,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-18 04:16:58,691 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:16:58,691 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:16:58,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 04:16:58,909 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 [2022-03-18 04:16:58,909 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:16:58,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:16:58,910 INFO L85 PathProgramCache]: Analyzing trace with hash -497884428, now seen corresponding path program 1 times [2022-03-18 04:16:58,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:16:58,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [771458824] [2022-03-18 04:16:58,910 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:16:58,910 INFO L85 PathProgramCache]: Analyzing trace with hash -497884428, now seen corresponding path program 2 times [2022-03-18 04:16:58,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:16:58,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828987548] [2022-03-18 04:16:58,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:16:58,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:16:58,922 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:16:58,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [671604220] [2022-03-18 04:16:58,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 04:16:58,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:16:58,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:16:58,925 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) [2022-03-18 04:16:58,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 04:16:58,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 04:16:58,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:16:58,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-18 04:16:58,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:17:01,705 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 04:17:01,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:17:02,485 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 04:17:02,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:17:02,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828987548] [2022-03-18 04:17:02,485 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:17:02,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671604220] [2022-03-18 04:17:02,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671604220] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:17:02,486 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:17:02,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2022-03-18 04:17:02,486 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:17:02,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [771458824] [2022-03-18 04:17:02,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [771458824] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:17:02,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:17:02,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 04:17:02,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455382273] [2022-03-18 04:17:02,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:17:02,487 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 04:17:02,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:17:02,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 04:17:02,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-03-18 04:17:02,487 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 04:17:02,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:17:02,705 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2022-03-18 04:17:02,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 04:17:02,706 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2022-03-18 04:17:02,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:17:02,707 INFO L225 Difference]: With dead ends: 59 [2022-03-18 04:17:02,708 INFO L226 Difference]: Without dead ends: 52 [2022-03-18 04:17:02,708 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-03-18 04:17:02,708 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 27 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 04:17:02,709 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 128 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 04:17:02,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-18 04:17:02,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2022-03-18 04:17:02,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.121212121212121) internal successors, (37), 35 states have internal predecessors, (37), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-18 04:17:02,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2022-03-18 04:17:02,714 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 37 [2022-03-18 04:17:02,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:17:02,715 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2022-03-18 04:17:02,715 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 04:17:02,715 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2022-03-18 04:17:02,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-18 04:17:02,717 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:17:02,717 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:17:02,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 04:17:02,933 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 [2022-03-18 04:17:02,933 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:17:02,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:17:02,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1351630086, now seen corresponding path program 1 times [2022-03-18 04:17:02,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:17:02,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1610403028] [2022-03-18 04:17:02,934 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:17:02,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1351630086, now seen corresponding path program 2 times [2022-03-18 04:17:02,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:17:02,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873902686] [2022-03-18 04:17:02,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:17:02,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:17:02,942 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:17:02,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1276894600] [2022-03-18 04:17:02,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 04:17:02,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:17:02,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:17:02,967 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) [2022-03-18 04:17:02,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 04:17:03,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 04:17:03,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:17:03,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-18 04:17:03,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:17:03,097 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-18 04:17:03,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:17:03,202 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-18 04:17:03,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:17:03,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873902686] [2022-03-18 04:17:03,202 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:17:03,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276894600] [2022-03-18 04:17:03,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276894600] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:17:03,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:17:03,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-03-18 04:17:03,203 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:17:03,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1610403028] [2022-03-18 04:17:03,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1610403028] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:17:03,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:17:03,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 04:17:03,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435899624] [2022-03-18 04:17:03,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:17:03,203 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 04:17:03,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:17:03,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 04:17:03,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-18 04:17:03,204 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-18 04:17:05,210 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 04:17:05,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:17:05,276 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2022-03-18 04:17:05,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 04:17:05,276 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 43 [2022-03-18 04:17:05,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:17:05,278 INFO L225 Difference]: With dead ends: 57 [2022-03-18 04:17:05,278 INFO L226 Difference]: Without dead ends: 50 [2022-03-18 04:17:05,279 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-03-18 04:17:05,281 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 12 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-18 04:17:05,281 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 151 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-03-18 04:17:05,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-18 04:17:05,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2022-03-18 04:17:05,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 28 states have internal predecessors, (30), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 04:17:05,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2022-03-18 04:17:05,296 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 43 [2022-03-18 04:17:05,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:17:05,296 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2022-03-18 04:17:05,296 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-18 04:17:05,297 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2022-03-18 04:17:05,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-18 04:17:05,301 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:17:05,302 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:17:05,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 04:17:05,518 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 [2022-03-18 04:17:05,518 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:17:05,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:17:05,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1025268728, now seen corresponding path program 3 times [2022-03-18 04:17:05,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:17:05,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1505571263] [2022-03-18 04:17:05,519 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:17:05,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1025268728, now seen corresponding path program 4 times [2022-03-18 04:17:05,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:17:05,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567793406] [2022-03-18 04:17:05,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:17:05,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:17:05,529 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:17:05,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [245979557] [2022-03-18 04:17:05,530 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 04:17:05,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:17:05,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:17:05,531 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) [2022-03-18 04:17:05,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 04:17:05,568 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 04:17:05,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:17:05,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-18 04:17:05,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:17:06,185 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 04:17:06,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:17:07,464 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-18 04:17:07,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:17:07,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567793406] [2022-03-18 04:17:07,465 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:17:07,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245979557] [2022-03-18 04:17:07,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245979557] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:17:07,465 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:17:07,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 20 [2022-03-18 04:17:07,465 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:17:07,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1505571263] [2022-03-18 04:17:07,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1505571263] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:17:07,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:17:07,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-18 04:17:07,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843243385] [2022-03-18 04:17:07,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:17:07,466 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 04:17:07,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:17:07,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 04:17:07,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-03-18 04:17:07,467 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-18 04:17:07,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:17:07,715 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2022-03-18 04:17:07,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 04:17:07,715 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 46 [2022-03-18 04:17:07,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:17:07,716 INFO L225 Difference]: With dead ends: 63 [2022-03-18 04:17:07,716 INFO L226 Difference]: Without dead ends: 61 [2022-03-18 04:17:07,717 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-03-18 04:17:07,717 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 29 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 04:17:07,717 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 223 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 04:17:07,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-03-18 04:17:07,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2022-03-18 04:17:07,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 35 states have internal predecessors, (38), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-18 04:17:07,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2022-03-18 04:17:07,726 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 46 [2022-03-18 04:17:07,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:17:07,726 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2022-03-18 04:17:07,726 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-18 04:17:07,727 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2022-03-18 04:17:07,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-18 04:17:07,727 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:17:07,727 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:17:07,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 04:17:07,938 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 [2022-03-18 04:17:07,938 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:17:07,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:17:07,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1494691206, now seen corresponding path program 1 times [2022-03-18 04:17:07,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:17:07,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1702560190] [2022-03-18 04:17:07,939 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:17:07,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1494691206, now seen corresponding path program 2 times [2022-03-18 04:17:07,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:17:07,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250200276] [2022-03-18 04:17:07,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:17:07,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:17:07,956 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:17:07,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [981871508] [2022-03-18 04:17:07,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 04:17:07,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:17:07,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:17:07,958 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) [2022-03-18 04:17:07,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 04:17:07,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 04:17:07,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:17:07,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-18 04:17:08,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:17:10,441 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-03-18 04:17:10,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:17:14,109 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-03-18 04:17:14,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:17:14,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250200276] [2022-03-18 04:17:14,110 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:17:14,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981871508] [2022-03-18 04:17:14,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981871508] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:17:14,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:17:14,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 19 [2022-03-18 04:17:14,110 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:17:14,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1702560190] [2022-03-18 04:17:14,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1702560190] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:17:14,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:17:14,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 04:17:14,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774292157] [2022-03-18 04:17:14,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:17:14,111 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 04:17:14,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:17:14,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 04:17:14,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-03-18 04:17:14,111 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-18 04:17:15,879 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 04:17:16,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:17:16,085 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2022-03-18 04:17:16,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 04:17:16,085 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 46 [2022-03-18 04:17:16,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:17:16,086 INFO L225 Difference]: With dead ends: 63 [2022-03-18 04:17:16,086 INFO L226 Difference]: Without dead ends: 61 [2022-03-18 04:17:16,086 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-03-18 04:17:16,086 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 17 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-18 04:17:16,087 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 210 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-18 04:17:16,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-03-18 04:17:16,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2022-03-18 04:17:16,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 35 states have internal predecessors, (38), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-18 04:17:16,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2022-03-18 04:17:16,093 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 46 [2022-03-18 04:17:16,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:17:16,093 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2022-03-18 04:17:16,094 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-18 04:17:16,094 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2022-03-18 04:17:16,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-18 04:17:16,094 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:17:16,094 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:17:16,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 04:17:16,308 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 [2022-03-18 04:17:16,308 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:17:16,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:17:16,309 INFO L85 PathProgramCache]: Analyzing trace with hash 4200374, now seen corresponding path program 3 times [2022-03-18 04:17:16,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:17:16,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1141028362] [2022-03-18 04:17:16,309 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:17:16,309 INFO L85 PathProgramCache]: Analyzing trace with hash 4200374, now seen corresponding path program 4 times [2022-03-18 04:17:16,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:17:16,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973497084] [2022-03-18 04:17:16,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:17:16,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:17:16,319 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:17:16,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [680405393] [2022-03-18 04:17:16,319 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 04:17:16,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:17:16,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:17:16,320 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) [2022-03-18 04:17:16,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 04:17:16,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 04:17:16,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:17:16,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-18 04:17:16,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:17:18,360 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-18 04:17:18,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:17:21,775 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-18 04:17:21,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:17:21,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973497084] [2022-03-18 04:17:21,776 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:17:21,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680405393] [2022-03-18 04:17:21,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680405393] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:17:21,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:17:21,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 20 [2022-03-18 04:17:21,776 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:17:21,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1141028362] [2022-03-18 04:17:21,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1141028362] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:17:21,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:17:21,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-18 04:17:21,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19151149] [2022-03-18 04:17:21,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:17:21,777 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 04:17:21,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:17:21,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 04:17:21,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-03-18 04:17:21,778 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 14 states have internal predecessors, (26), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-18 04:17:21,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:17:21,990 INFO L93 Difference]: Finished difference Result 72 states and 79 transitions. [2022-03-18 04:17:21,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 04:17:21,990 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 14 states have internal predecessors, (26), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 46 [2022-03-18 04:17:21,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:17:21,991 INFO L225 Difference]: With dead ends: 72 [2022-03-18 04:17:21,991 INFO L226 Difference]: Without dead ends: 70 [2022-03-18 04:17:21,991 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 69 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2022-03-18 04:17:21,992 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 35 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 04:17:21,992 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 184 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 04:17:21,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-18 04:17:21,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 59. [2022-03-18 04:17:22,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 42 states have internal predecessors, (46), 10 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-18 04:17:22,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2022-03-18 04:17:22,003 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 46 [2022-03-18 04:17:22,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:17:22,003 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2022-03-18 04:17:22,003 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 14 states have internal predecessors, (26), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-18 04:17:22,003 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2022-03-18 04:17:22,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-18 04:17:22,004 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:17:22,004 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:17:22,038 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-03-18 04:17:22,239 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 [2022-03-18 04:17:22,239 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:17:22,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:17:22,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1779207736, now seen corresponding path program 3 times [2022-03-18 04:17:22,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:17:22,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1644983554] [2022-03-18 04:17:22,240 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:17:22,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1779207736, now seen corresponding path program 4 times [2022-03-18 04:17:22,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:17:22,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321567555] [2022-03-18 04:17:22,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:17:22,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:17:22,246 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:17:22,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1110135948] [2022-03-18 04:17:22,247 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 04:17:22,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:17:22,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:17:22,248 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) [2022-03-18 04:17:22,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 04:17:22,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 04:17:22,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:17:22,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-18 04:17:22,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:17:22,836 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-18 04:17:22,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:17:25,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:17:25,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321567555] [2022-03-18 04:17:25,232 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:17:25,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110135948] [2022-03-18 04:17:25,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110135948] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 04:17:25,232 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 04:17:25,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-18 04:17:25,232 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:17:25,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1644983554] [2022-03-18 04:17:25,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1644983554] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:17:25,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:17:25,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-18 04:17:25,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340089041] [2022-03-18 04:17:25,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:17:25,233 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 04:17:25,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:17:25,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 04:17:25,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2022-03-18 04:17:25,234 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 13 states have internal predecessors, (26), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-18 04:17:25,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:17:25,534 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2022-03-18 04:17:25,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 04:17:25,534 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 13 states have internal predecessors, (26), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 46 [2022-03-18 04:17:25,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:17:25,535 INFO L225 Difference]: With dead ends: 71 [2022-03-18 04:17:25,535 INFO L226 Difference]: Without dead ends: 69 [2022-03-18 04:17:25,535 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2022-03-18 04:17:25,536 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 26 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 04:17:25,536 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 198 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 04:17:25,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-18 04:17:25,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 50. [2022-03-18 04:17:25,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 35 states have internal predecessors, (38), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-18 04:17:25,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2022-03-18 04:17:25,543 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 46 [2022-03-18 04:17:25,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:17:25,544 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2022-03-18 04:17:25,544 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 13 states have internal predecessors, (26), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-18 04:17:25,544 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2022-03-18 04:17:25,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-18 04:17:25,544 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:17:25,544 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:17:25,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-18 04:17:25,756 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 [2022-03-18 04:17:25,756 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:17:25,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:17:25,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1060406066, now seen corresponding path program 5 times [2022-03-18 04:17:25,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:17:25,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [618072215] [2022-03-18 04:17:25,757 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:17:25,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1060406066, now seen corresponding path program 6 times [2022-03-18 04:17:25,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:17:25,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215915224] [2022-03-18 04:17:25,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:17:25,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:17:25,775 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:17:25,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1498856197] [2022-03-18 04:17:25,776 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 04:17:25,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:17:25,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:17:25,781 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) [2022-03-18 04:17:25,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-18 04:17:25,818 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-18 04:17:25,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:17:25,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-18 04:17:25,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:17:30,087 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 04:17:32,086 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-18 04:17:32,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:17:35,711 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-18 04:17:35,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:17:35,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215915224] [2022-03-18 04:17:35,711 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:17:35,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498856197] [2022-03-18 04:17:35,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498856197] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:17:35,712 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:17:35,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 14 [2022-03-18 04:17:35,712 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:17:35,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [618072215] [2022-03-18 04:17:35,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [618072215] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:17:35,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:17:35,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 04:17:35,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082538883] [2022-03-18 04:17:35,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:17:35,713 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 04:17:35,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:17:35,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 04:17:35,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=140, Unknown=3, NotChecked=0, Total=182 [2022-03-18 04:17:35,713 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-18 04:17:39,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:17:39,294 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2022-03-18 04:17:39,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 04:17:39,295 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 55 [2022-03-18 04:17:39,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:17:39,295 INFO L225 Difference]: With dead ends: 73 [2022-03-18 04:17:39,295 INFO L226 Difference]: Without dead ends: 71 [2022-03-18 04:17:39,296 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 95 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=52, Invalid=185, Unknown=3, NotChecked=0, Total=240 [2022-03-18 04:17:39,296 INFO L912 BasicCegarLoop]: 23 mSDtfsCounter, 16 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-18 04:17:39,296 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 148 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 78 Invalid, 0 Unknown, 13 Unchecked, 1.5s Time] [2022-03-18 04:17:39,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-18 04:17:39,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 50. [2022-03-18 04:17:39,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 35 states have internal predecessors, (38), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-18 04:17:39,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2022-03-18 04:17:39,306 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 55 [2022-03-18 04:17:39,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:17:39,306 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2022-03-18 04:17:39,307 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-18 04:17:39,307 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2022-03-18 04:17:39,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-18 04:17:39,307 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:17:39,307 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:17:39,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-18 04:17:39,523 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 [2022-03-18 04:17:39,524 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:17:39,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:17:39,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1459553868, now seen corresponding path program 5 times [2022-03-18 04:17:39,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:17:39,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [439458063] [2022-03-18 04:17:39,524 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:17:39,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1459553868, now seen corresponding path program 6 times [2022-03-18 04:17:39,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:17:39,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198936304] [2022-03-18 04:17:39,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:17:39,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:17:39,541 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:17:39,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1937227791] [2022-03-18 04:17:39,541 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 04:17:39,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:17:39,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:17:39,546 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) [2022-03-18 04:17:39,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-18 04:17:39,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-18 04:17:39,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:17:39,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-18 04:17:39,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:17:40,754 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 04:17:42,771 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-03-18 04:17:42,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:17:43,358 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-03-18 04:17:43,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:17:43,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198936304] [2022-03-18 04:17:43,358 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:17:43,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937227791] [2022-03-18 04:17:43,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937227791] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:17:43,359 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:17:43,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2022-03-18 04:17:43,359 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:17:43,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [439458063] [2022-03-18 04:17:43,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [439458063] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:17:43,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:17:43,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 04:17:43,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866755578] [2022-03-18 04:17:43,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:17:43,360 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 04:17:43,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:17:43,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 04:17:43,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-03-18 04:17:43,360 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-18 04:17:45,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:17:45,012 INFO L93 Difference]: Finished difference Result 79 states and 89 transitions. [2022-03-18 04:17:45,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 04:17:45,013 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 55 [2022-03-18 04:17:45,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:17:45,013 INFO L225 Difference]: With dead ends: 79 [2022-03-18 04:17:45,013 INFO L226 Difference]: Without dead ends: 50 [2022-03-18 04:17:45,014 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2022-03-18 04:17:45,014 INFO L912 BasicCegarLoop]: 30 mSDtfsCounter, 12 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 04:17:45,014 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 227 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 111 Invalid, 0 Unknown, 17 Unchecked, 0.3s Time] [2022-03-18 04:17:45,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-18 04:17:45,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-03-18 04:17:45,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 35 states have internal predecessors, (35), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-18 04:17:45,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2022-03-18 04:17:45,025 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 55 [2022-03-18 04:17:45,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:17:45,025 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2022-03-18 04:17:45,025 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-18 04:17:45,025 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2022-03-18 04:17:45,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-18 04:17:45,026 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:17:45,026 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:17:45,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-18 04:17:45,227 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 [2022-03-18 04:17:45,227 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:17:45,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:17:45,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1954893684, now seen corresponding path program 5 times [2022-03-18 04:17:45,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:17:45,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1939832436] [2022-03-18 04:17:45,228 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:17:45,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1954893684, now seen corresponding path program 6 times [2022-03-18 04:17:45,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:17:45,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413500034] [2022-03-18 04:17:45,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:17:45,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:17:45,233 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:17:45,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1294017932] [2022-03-18 04:17:45,233 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 04:17:45,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:17:45,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:17:45,250 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) [2022-03-18 04:17:45,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-18 04:17:45,296 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-18 04:17:45,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:17:45,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-18 04:17:45,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:17:52,866 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 22 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 04:17:52,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:17:55,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:17:55,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413500034] [2022-03-18 04:17:55,020 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:17:55,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294017932] [2022-03-18 04:17:55,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294017932] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 04:17:55,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 04:17:55,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-18 04:17:55,020 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:17:55,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1939832436] [2022-03-18 04:17:55,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1939832436] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:17:55,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:17:55,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-18 04:17:55,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645134576] [2022-03-18 04:17:55,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:17:55,021 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 04:17:55,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:17:55,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 04:17:55,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-03-18 04:17:55,021 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-03-18 04:17:55,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:17:55,348 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2022-03-18 04:17:55,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 04:17:55,349 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 55 [2022-03-18 04:17:55,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:17:55,349 INFO L225 Difference]: With dead ends: 64 [2022-03-18 04:17:55,349 INFO L226 Difference]: Without dead ends: 62 [2022-03-18 04:17:55,349 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2022-03-18 04:17:55,350 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 32 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 04:17:55,350 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 229 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 04:17:55,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-03-18 04:17:55,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2022-03-18 04:17:55,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.024390243902439) internal successors, (42), 42 states have internal predecessors, (42), 10 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-18 04:17:55,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2022-03-18 04:17:55,358 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 55 [2022-03-18 04:17:55,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:17:55,358 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2022-03-18 04:17:55,358 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-03-18 04:17:55,358 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2022-03-18 04:17:55,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-18 04:17:55,358 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:17:55,358 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:17:55,375 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-03-18 04:17:55,573 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 [2022-03-18 04:17:55,573 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:17:55,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:17:55,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1351365048, now seen corresponding path program 7 times [2022-03-18 04:17:55,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:17:55,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2070007514] [2022-03-18 04:17:55,574 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:17:55,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1351365048, now seen corresponding path program 8 times [2022-03-18 04:17:55,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:17:55,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254927672] [2022-03-18 04:17:55,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:17:55,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:17:55,580 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:17:55,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1820557733] [2022-03-18 04:17:55,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 04:17:55,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:17:55,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:17:55,585 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) [2022-03-18 04:17:55,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-18 04:17:55,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 04:17:55,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:17:55,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-18 04:17:55,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:17:55,867 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-18 04:17:55,867 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 04:17:55,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:17:55,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254927672] [2022-03-18 04:17:55,867 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:17:55,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820557733] [2022-03-18 04:17:55,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820557733] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:17:55,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:17:55,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 04:17:55,868 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:17:55,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2070007514] [2022-03-18 04:17:55,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2070007514] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:17:55,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:17:55,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 04:17:55,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295830211] [2022-03-18 04:17:55,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:17:55,868 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 04:17:55,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:17:55,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 04:17:55,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-03-18 04:17:55,869 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2022-03-18 04:17:56,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:17:56,001 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2022-03-18 04:17:56,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 04:17:56,001 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) Word has length 64 [2022-03-18 04:17:56,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:17:56,001 INFO L225 Difference]: With dead ends: 61 [2022-03-18 04:17:56,001 INFO L226 Difference]: Without dead ends: 0 [2022-03-18 04:17:56,002 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2022-03-18 04:17:56,002 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 13 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 04:17:56,002 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 118 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 04:17:56,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-18 04:17:56,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-18 04:17:56,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-18 04:17:56,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-18 04:17:56,003 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 64 [2022-03-18 04:17:56,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:17:56,003 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-18 04:17:56,003 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2022-03-18 04:17:56,003 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-18 04:17:56,003 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-18 04:17:56,005 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-18 04:17:56,021 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-03-18 04:17:56,215 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 [2022-03-18 04:17:56,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-18 04:18:23,310 WARN L232 SmtUtils]: Spent 22.56s on a formula simplification. DAG size of input: 133 DAG size of output: 28 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-18 04:19:27,469 WARN L232 SmtUtils]: Spent 1.07m on a formula simplification. DAG size of input: 162 DAG size of output: 24 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-18 04:19:33,659 WARN L232 SmtUtils]: Spent 6.18s on a formula simplification. DAG size of input: 150 DAG size of output: 35 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-18 04:19:47,286 WARN L232 SmtUtils]: Spent 13.62s on a formula simplification. DAG size of input: 154 DAG size of output: 35 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-18 04:20:15,579 WARN L232 SmtUtils]: Spent 28.27s on a formula simplification. DAG size of input: 131 DAG size of output: 29 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-18 04:20:15,592 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 6) no Hoare annotation was computed. [2022-03-18 04:20:15,592 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 6) no Hoare annotation was computed. [2022-03-18 04:20:15,592 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 6) no Hoare annotation was computed. [2022-03-18 04:20:15,593 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 9 11) the Hoare annotation is: true [2022-03-18 04:20:15,593 INFO L878 garLoopResultBuilder]: At program point L10(line 10) the Hoare annotation is: (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|) [2022-03-18 04:20:15,593 INFO L878 garLoopResultBuilder]: At program point L10-2(lines 9 11) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-03-18 04:20:15,593 INFO L878 garLoopResultBuilder]: At program point assume_abort_if_notEXIT(lines 9 11) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-03-18 04:20:15,593 INFO L878 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: (and (<= 0 main_~a~0) (<= main_~a~0 10)) [2022-03-18 04:20:15,593 INFO L878 garLoopResultBuilder]: At program point L27-1(line 27) the Hoare annotation is: (and (<= 0 main_~a~0) (<= 0 main_~b~0) (<= main_~b~0 10) (<= main_~a~0 10)) [2022-03-18 04:20:15,593 INFO L885 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: true [2022-03-18 04:20:15,593 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 20 49) the Hoare annotation is: true [2022-03-18 04:20:15,593 INFO L878 garLoopResultBuilder]: At program point L25-1(line 25) the Hoare annotation is: (and (<= 0 main_~a~0) (<= main_~a~0 10)) [2022-03-18 04:20:15,593 INFO L885 garLoopResultBuilder]: At program point L46(line 46) the Hoare annotation is: true [2022-03-18 04:20:15,593 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 20 49) the Hoare annotation is: true [2022-03-18 04:20:15,593 INFO L878 garLoopResultBuilder]: At program point L34-2(lines 34 45) the Hoare annotation is: (let ((.cse0 (* main_~b~0 main_~a~0)) (.cse1 (<= 0 main_~a~0)) (.cse2 (<= main_~b~0 10)) (.cse3 (<= main_~a~0 10))) (or (and (= (+ main_~z~0 (* 2 (* (div (* (- 1) main_~x~0) (- 2)) main_~y~0))) .cse0) .cse1 (<= 1 main_~b~0) (< 0 (+ main_~y~0 1)) .cse2 .cse3 (= (mod main_~x~0 2) 0)) (and (= (+ main_~z~0 (* main_~y~0 main_~x~0)) .cse0) (= main_~b~0 main_~y~0) .cse1 (<= 1 main_~y~0) .cse2 (= main_~a~0 main_~x~0) .cse3))) [2022-03-18 04:20:15,593 INFO L878 garLoopResultBuilder]: At program point L34-3(lines 34 45) the Hoare annotation is: (and (= main_~z~0 (* main_~b~0 main_~a~0)) (<= 1 main_~b~0)) [2022-03-18 04:20:15,593 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 20 49) the Hoare annotation is: true [2022-03-18 04:20:15,593 INFO L878 garLoopResultBuilder]: At program point L28(line 28) the Hoare annotation is: (and (<= 0 main_~a~0) (<= 1 main_~b~0) (<= main_~b~0 10) (<= main_~a~0 10)) [2022-03-18 04:20:15,593 INFO L878 garLoopResultBuilder]: At program point L39(lines 39 42) the Hoare annotation is: (let ((.cse0 (* main_~b~0 main_~a~0))) (and (not (= main_~y~0 0)) (= (+ main_~z~0 (* main_~y~0 main_~x~0)) .cse0) (<= 0 main_~a~0) (= (mod (+ (* (- 1) main_~z~0) .cse0) main_~y~0) 0) (<= 1 main_~b~0) (< 0 (+ main_~y~0 1)) (<= main_~b~0 10) (<= main_~a~0 10))) [2022-03-18 04:20:15,594 INFO L878 garLoopResultBuilder]: At program point L39-2(lines 39 42) the Hoare annotation is: (let ((.cse0 (+ main_~y~0 1))) (and (<= 1 (mod .cse0 2)) (= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0)) (<= 0 main_~a~0) (<= 1 main_~b~0) (<= main_~b~0 10) (<= main_~a~0 10) (<= 0 .cse0))) [2022-03-18 04:20:15,594 INFO L878 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse0 (* main_~b~0 main_~a~0)) (.cse1 (<= 0 main_~a~0)) (.cse2 (<= main_~b~0 10)) (.cse3 (<= main_~a~0 10))) (or (and (= (+ main_~z~0 (* 2 (* (div (* (- 1) main_~x~0) (- 2)) main_~y~0))) .cse0) .cse1 (<= 1 main_~b~0) (< 0 (+ main_~y~0 1)) .cse2 .cse3 (= (mod main_~x~0 2) 0)) (and (= (+ main_~z~0 (* main_~y~0 main_~x~0)) .cse0) (= main_~b~0 main_~y~0) .cse1 (<= 1 main_~y~0) .cse2 (= main_~a~0 main_~x~0) .cse3))) [2022-03-18 04:20:15,594 INFO L878 garLoopResultBuilder]: At program point L35-1(lines 34 45) the Hoare annotation is: (let ((.cse0 (* main_~b~0 main_~a~0))) (and (= (+ main_~z~0 (* main_~y~0 main_~x~0)) .cse0) (<= 0 main_~a~0) (or (= main_~z~0 .cse0) (= (mod (+ (* (- 1) main_~z~0) .cse0) main_~y~0) 0)) (<= 1 main_~b~0) (< 0 (+ main_~y~0 1)) (<= main_~b~0 10) (<= main_~a~0 10))) [2022-03-18 04:20:15,594 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-03-18 04:20:15,594 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-18 04:20:15,594 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-03-18 04:20:15,594 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-03-18 04:20:15,594 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-18 04:20:15,594 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-18 04:20:15,594 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-03-18 04:20:15,594 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 12 18) the Hoare annotation is: true [2022-03-18 04:20:15,594 INFO L878 garLoopResultBuilder]: At program point L14(lines 14 15) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-03-18 04:20:15,594 INFO L878 garLoopResultBuilder]: At program point L13(lines 13 16) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-03-18 04:20:15,594 INFO L878 garLoopResultBuilder]: At program point L13-2(lines 12 18) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-03-18 04:20:15,594 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 12 18) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-03-18 04:20:15,594 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-03-18 04:20:15,596 INFO L718 BasicCegarLoop]: Path program histogram: [8, 6, 6, 2, 2, 2, 2] [2022-03-18 04:20:15,597 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-18 04:20:15,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 04:20:15 BoogieIcfgContainer [2022-03-18 04:20:15,626 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-18 04:20:15,626 INFO L158 Benchmark]: Toolchain (without parser) took 210866.60ms. Allocated memory was 166.7MB in the beginning and 336.6MB in the end (delta: 169.9MB). Free memory was 117.7MB in the beginning and 122.2MB in the end (delta: -4.5MB). Peak memory consumption was 181.5MB. Max. memory is 8.0GB. [2022-03-18 04:20:15,626 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 166.7MB. Free memory was 134.5MB in the beginning and 134.4MB in the end (delta: 76.9kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-18 04:20:15,627 INFO L158 Benchmark]: CACSL2BoogieTranslator took 198.71ms. Allocated memory is still 166.7MB. Free memory was 117.5MB in the beginning and 143.3MB in the end (delta: -25.7MB). Peak memory consumption was 12.1MB. Max. memory is 8.0GB. [2022-03-18 04:20:15,627 INFO L158 Benchmark]: Boogie Preprocessor took 33.02ms. Allocated memory is still 166.7MB. Free memory was 143.3MB in the beginning and 141.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-18 04:20:15,627 INFO L158 Benchmark]: RCFGBuilder took 210.58ms. Allocated memory is still 166.7MB. Free memory was 141.8MB in the beginning and 131.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-18 04:20:15,627 INFO L158 Benchmark]: TraceAbstraction took 210419.90ms. Allocated memory was 166.7MB in the beginning and 336.6MB in the end (delta: 169.9MB). Free memory was 130.8MB in the beginning and 122.2MB in the end (delta: 8.6MB). Peak memory consumption was 194.6MB. Max. memory is 8.0GB. [2022-03-18 04:20:15,628 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 166.7MB. Free memory was 134.5MB in the beginning and 134.4MB in the end (delta: 76.9kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 198.71ms. Allocated memory is still 166.7MB. Free memory was 117.5MB in the beginning and 143.3MB in the end (delta: -25.7MB). Peak memory consumption was 12.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 33.02ms. Allocated memory is still 166.7MB. Free memory was 143.3MB in the beginning and 141.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 210.58ms. Allocated memory is still 166.7MB. Free memory was 141.8MB in the beginning and 131.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 210419.90ms. Allocated memory was 166.7MB in the beginning and 336.6MB in the end (delta: 169.9MB). Free memory was 130.8MB in the beginning and 122.2MB in the end (delta: 8.6MB). Peak memory consumption was 194.6MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 15]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 210.3s, OverallIterations: 14, TraceHistogramMax: 5, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.0s, AutomataDifference: 13.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 139.4s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 298 SdHoareTripleChecker+Valid, 9.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 276 mSDsluCounter, 2233 SdHoareTripleChecker+Invalid, 9.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 30 IncrementalHoareTripleChecker+Unchecked, 1892 mSDsCounter, 89 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2161 IncrementalHoareTripleChecker+Invalid, 2282 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 89 mSolverCounterUnsat, 341 mSDtfsCounter, 2161 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1034 GetRequests, 791 SyntacticMatches, 26 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 30.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=9, InterpolantAutomatonStates: 158, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 98 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 32 LocationsWithAnnotation, 132 PreInvPairs, 216 NumberOfFragments, 374 HoareAnnotationTreeSize, 132 FomulaSimplifications, 3787 FormulaSimplificationTreeSizeReduction, 4.5s HoareSimplificationTime, 32 FomulaSimplificationsInter, 231643 FormulaSimplificationTreeSizeReductionInter, 134.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: ((((((z + 2 * (-1 * x / -2 * y) == b * a && 0 <= a) && 1 <= b) && 0 < y + 1) && b <= 10) && a <= 10) && x % 2 == 0) || ((((((z + y * x == b * a && b == y) && 0 <= a) && 1 <= y) && b <= 10) && a == x) && a <= 10) - ProcedureContractResult [Line: 9]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not: !(\old(cond) == 0) && cond == \old(cond) - ProcedureContractResult [Line: 20]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 12]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: \old(cond) == cond || !(1 <= \old(cond)) RESULT: Ultimate proved your program to be correct! [2022-03-18 04:20:15,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...