/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/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 16:24:28,253 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 16:24:28,255 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 16:24:28,273 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 16:24:28,293 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 16:24:28,293 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 16:24:28,307 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 16:24:28,307 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-04-06 16:24:28,317 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 16:24:28,317 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 16:24:28,318 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 16:24:28,318 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 16:24:28,318 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 16:24:28,318 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 16:24:28,318 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 16:24:28,318 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 16:24:28,318 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 16:24:28,318 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 16:24:28,318 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 16:24:28,318 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 16:24:28,319 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 16:24:28,319 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 16:24:28,319 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 16:24:28,320 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 16:24:28,321 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 16:24:28,321 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 16:24:28,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 16:24:28,321 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 16:24:28,321 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 16:24:28,321 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 16:24:28,321 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 16:24:28,321 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 16:24:28,321 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-04-06 16:24:28,322 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 16:24:28,506 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 16:24:28,528 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 16:24:28,530 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 16:24:28,531 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 16:24:28,536 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 16:24:28,537 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound50.c [2022-04-06 16:24:28,588 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb77427c0/d09c4c57d9bc42c1938cf3ffc1325bcb/FLAG4454b1e25 [2022-04-06 16:24:28,972 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 16:24:28,972 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound50.c [2022-04-06 16:24:28,977 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb77427c0/d09c4c57d9bc42c1938cf3ffc1325bcb/FLAG4454b1e25 [2022-04-06 16:24:28,986 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb77427c0/d09c4c57d9bc42c1938cf3ffc1325bcb [2022-04-06 16:24:28,988 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 16:24:28,989 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 16:24:28,989 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 16:24:28,989 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 16:24:28,992 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 16:24:28,992 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 04:24:28" (1/1) ... [2022-04-06 16:24:28,993 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68c39676 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:24:28, skipping insertion in model container [2022-04-06 16:24:28,993 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 04:24:28" (1/1) ... [2022-04-06 16:24:28,997 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 16:24:29,006 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 16:24:29,143 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/egcd-ll_unwindbound50.c[489,502] [2022-04-06 16:24:29,168 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 16:24:29,175 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 16:24:29,183 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/egcd-ll_unwindbound50.c[489,502] [2022-04-06 16:24:29,200 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 16:24:29,208 INFO L208 MainTranslator]: Completed translation [2022-04-06 16:24:29,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:24:29 WrapperNode [2022-04-06 16:24:29,208 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 16:24:29,209 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 16:24:29,209 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 16:24:29,209 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 16:24:29,218 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:24:29" (1/1) ... [2022-04-06 16:24:29,218 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:24:29" (1/1) ... [2022-04-06 16:24:29,225 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:24:29" (1/1) ... [2022-04-06 16:24:29,226 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:24:29" (1/1) ... [2022-04-06 16:24:29,235 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:24:29" (1/1) ... [2022-04-06 16:24:29,239 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:24:29" (1/1) ... [2022-04-06 16:24:29,242 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:24:29" (1/1) ... [2022-04-06 16:24:29,245 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 16:24:29,245 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 16:24:29,245 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 16:24:29,245 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 16:24:29,246 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:24:29" (1/1) ... [2022-04-06 16:24:29,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 16:24:29,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:24:29,272 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 16:24:29,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 16:24:29,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 16:24:29,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 16:24:29,309 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 16:24:29,310 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 16:24:29,310 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 16:24:29,310 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 16:24:29,310 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 16:24:29,310 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 16:24:29,310 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 16:24:29,310 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 16:24:29,310 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 16:24:29,311 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 16:24:29,312 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 16:24:29,312 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 16:24:29,312 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 16:24:29,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 16:24:29,312 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 16:24:29,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 16:24:29,312 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 16:24:29,312 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 16:24:29,362 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 16:24:29,363 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 16:24:29,465 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 16:24:29,469 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 16:24:29,469 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 16:24:29,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 04:24:29 BoogieIcfgContainer [2022-04-06 16:24:29,470 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 16:24:29,471 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 16:24:29,471 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 16:24:29,479 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 16:24:29,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 04:24:28" (1/3) ... [2022-04-06 16:24:29,480 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37181c48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 04:24:29, skipping insertion in model container [2022-04-06 16:24:29,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:24:29" (2/3) ... [2022-04-06 16:24:29,480 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37181c48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 04:24:29, skipping insertion in model container [2022-04-06 16:24:29,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 04:24:29" (3/3) ... [2022-04-06 16:24:29,481 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_unwindbound50.c [2022-04-06 16:24:29,484 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 16:24:29,485 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 16:24:29,513 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 16:24:29,518 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 [2022-04-06 16:24:29,518 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 16:24:29,528 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 16:24:29,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 16:24:29,533 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:24:29,533 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:24:29,533 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:24:29,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:24:29,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1226702723, now seen corresponding path program 1 times [2022-04-06 16:24:29,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:24:29,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1070498164] [2022-04-06 16:24:29,550 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:24:29,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1226702723, now seen corresponding path program 2 times [2022-04-06 16:24:29,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:24:29,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056169501] [2022-04-06 16:24:29,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:24:29,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:24:29,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:24:29,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 16:24:29,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:24:29,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 16:24:29,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:24:29,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 16:24:29,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:24:29,685 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 16:24:29,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:24:29,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056169501] [2022-04-06 16:24:29,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056169501] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:24:29,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:24:29,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 16:24:29,688 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:24:29,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1070498164] [2022-04-06 16:24:29,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1070498164] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:24:29,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:24:29,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 16:24:29,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811535950] [2022-04-06 16:24:29,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:24:29,692 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 16:24:29,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:24:29,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 16:24:29,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 16:24:29,711 INFO L87 Difference]: Start difference. First operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 16:24:29,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:24:29,781 INFO L93 Difference]: Finished difference Result 64 states and 97 transitions. [2022-04-06 16:24:29,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 16:24:29,784 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-04-06 16:24:29,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:24:29,790 INFO L225 Difference]: With dead ends: 64 [2022-04-06 16:24:29,790 INFO L226 Difference]: Without dead ends: 31 [2022-04-06 16:24:29,793 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 16:24:29,799 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:24:29,801 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 45 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:24:29,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-04-06 16:24:29,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2022-04-06 16:24:29,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 16:24:29,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2022-04-06 16:24:29,837 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 22 [2022-04-06 16:24:29,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:24:29,838 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2022-04-06 16:24:29,838 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 16:24:29,838 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2022-04-06 16:24:29,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 16:24:29,840 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:24:29,840 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:24:29,841 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 16:24:29,841 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:24:29,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:24:29,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1346542817, now seen corresponding path program 1 times [2022-04-06 16:24:29,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:24:29,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1832943836] [2022-04-06 16:24:29,849 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:24:29,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1346542817, now seen corresponding path program 2 times [2022-04-06 16:24:29,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:24:29,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036550513] [2022-04-06 16:24:29,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:24:29,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:24:29,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:24:29,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 16:24:29,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:24:29,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 16:24:29,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:24:29,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 16:24:29,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:24:29,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 16:24:29,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:24:29,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036550513] [2022-04-06 16:24:29,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036550513] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:24:29,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:24:29,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:24:29,988 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:24:29,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1832943836] [2022-04-06 16:24:29,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1832943836] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:24:29,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:24:29,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:24:29,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48327023] [2022-04-06 16:24:29,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:24:29,989 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:24:29,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:24:29,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:24:29,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 16:24:29,990 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 16:24:30,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:24:30,089 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2022-04-06 16:24:30,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 16:24:30,090 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), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-04-06 16:24:30,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:24:30,092 INFO L225 Difference]: With dead ends: 42 [2022-04-06 16:24:30,092 INFO L226 Difference]: Without dead ends: 32 [2022-04-06 16:24:30,092 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 16:24:30,094 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 13 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:24:30,095 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 65 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:24:30,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-04-06 16:24:30,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-04-06 16:24:30,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 16:24:30,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-04-06 16:24:30,109 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 23 [2022-04-06 16:24:30,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:24:30,112 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-04-06 16:24:30,112 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), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 16:24:30,112 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-04-06 16:24:30,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 16:24:30,113 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:24:30,113 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:24:30,113 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 16:24:30,114 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:24:30,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:24:30,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1348211113, now seen corresponding path program 1 times [2022-04-06 16:24:30,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:24:30,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [922950387] [2022-04-06 16:24:30,120 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:24:30,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1348211113, now seen corresponding path program 2 times [2022-04-06 16:24:30,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:24:30,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789190190] [2022-04-06 16:24:30,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:24:30,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:24:30,144 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:24:30,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1505471092] [2022-04-06 16:24:30,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:24:30,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:24:30,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:24:30,186 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:24:30,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 16:24:30,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 16:24:30,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:24:30,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 16:24:30,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:24:30,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 16:24:30,368 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 16:24:30,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:24:30,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789190190] [2022-04-06 16:24:30,368 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:24:30,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505471092] [2022-04-06 16:24:30,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505471092] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:24:30,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:24:30,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:24:30,369 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:24:30,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [922950387] [2022-04-06 16:24:30,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [922950387] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:24:30,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:24:30,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:24:30,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844571916] [2022-04-06 16:24:30,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:24:30,371 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:24:30,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:24:30,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:24:30,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 16:24:30,372 INFO L87 Difference]: Start difference. First operand 32 states and 41 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 16:24:30,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:24:30,437 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2022-04-06 16:24:30,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 16:24:30,437 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-04-06 16:24:30,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:24:30,438 INFO L225 Difference]: With dead ends: 49 [2022-04-06 16:24:30,438 INFO L226 Difference]: Without dead ends: 47 [2022-04-06 16:24:30,439 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 16:24:30,439 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 8 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:24:30,440 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 134 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:24:30,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-04-06 16:24:30,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-04-06 16:24:30,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 26 states have internal predecessors, (31), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-06 16:24:30,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2022-04-06 16:24:30,447 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 23 [2022-04-06 16:24:30,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:24:30,447 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2022-04-06 16:24:30,447 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 16:24:30,448 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2022-04-06 16:24:30,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 16:24:30,448 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:24:30,448 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:24:30,474 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-06 16:24:30,674 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:24:30,674 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:24:30,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:24:30,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1060153012, now seen corresponding path program 1 times [2022-04-06 16:24:30,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:24:30,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [158886845] [2022-04-06 16:24:30,676 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:24:30,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1060153012, now seen corresponding path program 2 times [2022-04-06 16:24:30,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:24:30,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451239886] [2022-04-06 16:24:30,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:24:30,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:24:30,687 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:24:30,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [355801326] [2022-04-06 16:24:30,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:24:30,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:24:30,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:24:30,688 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:24:30,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 16:24:30,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:24:30,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:24:30,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 16:24:30,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:24:30,830 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 16:24:30,831 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 16:24:30,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:24:30,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451239886] [2022-04-06 16:24:30,831 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:24:30,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355801326] [2022-04-06 16:24:30,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355801326] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:24:30,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:24:30,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:24:30,832 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:24:30,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [158886845] [2022-04-06 16:24:30,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [158886845] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:24:30,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:24:30,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:24:30,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817539899] [2022-04-06 16:24:30,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:24:30,833 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:24:30,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:24:30,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:24:30,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 16:24:30,834 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 16:24:30,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:24:30,875 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2022-04-06 16:24:30,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 16:24:30,876 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-04-06 16:24:30,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:24:30,877 INFO L225 Difference]: With dead ends: 53 [2022-04-06 16:24:30,877 INFO L226 Difference]: Without dead ends: 51 [2022-04-06 16:24:30,877 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 16:24:30,878 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 9 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:24:30,878 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 138 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:24:30,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-04-06 16:24:30,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-04-06 16:24:30,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 29 states have internal predecessors, (34), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-06 16:24:30,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 66 transitions. [2022-04-06 16:24:30,885 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 66 transitions. Word has length 28 [2022-04-06 16:24:30,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:24:30,885 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 66 transitions. [2022-04-06 16:24:30,885 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 16:24:30,885 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 66 transitions. [2022-04-06 16:24:30,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 16:24:30,886 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:24:30,886 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:24:30,917 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-04-06 16:24:31,118 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,SelfDestructingSolverStorable3 [2022-04-06 16:24:31,119 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:24:31,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:24:31,119 INFO L85 PathProgramCache]: Analyzing trace with hash -560761015, now seen corresponding path program 1 times [2022-04-06 16:24:31,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:24:31,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1134044040] [2022-04-06 16:24:31,120 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:24:31,120 INFO L85 PathProgramCache]: Analyzing trace with hash -560761015, now seen corresponding path program 2 times [2022-04-06 16:24:31,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:24:31,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717319985] [2022-04-06 16:24:31,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:24:31,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:24:31,135 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:24:31,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1667964582] [2022-04-06 16:24:31,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:24:31,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:24:31,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:24:31,136 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:24:31,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 16:24:31,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:24:31,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:24:31,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 16:24:31,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:24:31,356 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-06 16:24:31,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:24:31,442 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 16:24:31,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:24:31,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717319985] [2022-04-06 16:24:31,443 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:24:31,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667964582] [2022-04-06 16:24:31,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667964582] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 16:24:31,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:24:31,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-04-06 16:24:31,443 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:24:31,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1134044040] [2022-04-06 16:24:31,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1134044040] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:24:31,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:24:31,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:24:31,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653610675] [2022-04-06 16:24:31,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:24:31,444 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:24:31,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:24:31,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:24:31,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-04-06 16:24:31,445 INFO L87 Difference]: Start difference. First operand 50 states and 66 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 16:24:31,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:24:31,485 INFO L93 Difference]: Finished difference Result 75 states and 107 transitions. [2022-04-06 16:24:31,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 16:24:31,486 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-04-06 16:24:31,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:24:31,488 INFO L225 Difference]: With dead ends: 75 [2022-04-06 16:24:31,488 INFO L226 Difference]: Without dead ends: 71 [2022-04-06 16:24:31,488 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-04-06 16:24:31,489 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 9 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:24:31,489 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 128 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:24:31,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-04-06 16:24:31,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-04-06 16:24:31,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 40 states have internal predecessors, (48), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 16:24:31,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 100 transitions. [2022-04-06 16:24:31,499 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 100 transitions. Word has length 33 [2022-04-06 16:24:31,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:24:31,499 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 100 transitions. [2022-04-06 16:24:31,499 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 16:24:31,499 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 100 transitions. [2022-04-06 16:24:31,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 16:24:31,500 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:24:31,500 INFO L499 BasicCegarLoop]: trace histogram [4, 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, 1] [2022-04-06 16:24:31,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 16:24:31,720 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:24:31,720 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:24:31,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:24:31,720 INFO L85 PathProgramCache]: Analyzing trace with hash 201438379, now seen corresponding path program 1 times [2022-04-06 16:24:31,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:24:31,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2095646808] [2022-04-06 16:24:31,721 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:24:31,721 INFO L85 PathProgramCache]: Analyzing trace with hash 201438379, now seen corresponding path program 2 times [2022-04-06 16:24:31,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:24:31,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432248840] [2022-04-06 16:24:31,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:24:31,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:24:31,728 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:24:31,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [221744797] [2022-04-06 16:24:31,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:24:31,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:24:31,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:24:31,730 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:24:31,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 16:24:31,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:24:31,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:24:31,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 16:24:31,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:24:31,851 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 16:24:31,851 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 16:24:31,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:24:31,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432248840] [2022-04-06 16:24:31,852 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:24:31,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221744797] [2022-04-06 16:24:31,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221744797] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:24:31,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:24:31,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:24:31,859 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:24:31,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2095646808] [2022-04-06 16:24:31,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2095646808] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:24:31,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:24:31,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:24:31,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830844885] [2022-04-06 16:24:31,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:24:31,860 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:24:31,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:24:31,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:24:31,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 16:24:31,861 INFO L87 Difference]: Start difference. First operand 71 states and 100 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-04-06 16:24:31,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:24:31,905 INFO L93 Difference]: Finished difference Result 87 states and 123 transitions. [2022-04-06 16:24:31,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 16:24:31,905 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2022-04-06 16:24:31,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:24:31,909 INFO L225 Difference]: With dead ends: 87 [2022-04-06 16:24:31,909 INFO L226 Difference]: Without dead ends: 85 [2022-04-06 16:24:31,910 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 16:24:31,911 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 5 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:24:31,912 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 144 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:24:31,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-04-06 16:24:31,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 78. [2022-04-06 16:24:31,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 46 states have internal predecessors, (51), 31 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (27), 23 states have call predecessors, (27), 27 states have call successors, (27) [2022-04-06 16:24:31,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 109 transitions. [2022-04-06 16:24:31,932 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 109 transitions. Word has length 39 [2022-04-06 16:24:31,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:24:31,933 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 109 transitions. [2022-04-06 16:24:31,933 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-04-06 16:24:31,933 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 109 transitions. [2022-04-06 16:24:31,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 16:24:31,934 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:24:31,934 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:24:31,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 16:24:32,150 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:24:32,150 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:24:32,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:24:32,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1085077998, now seen corresponding path program 1 times [2022-04-06 16:24:32,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:24:32,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [274200462] [2022-04-06 16:24:32,152 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:24:32,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1085077998, now seen corresponding path program 2 times [2022-04-06 16:24:32,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:24:32,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894064787] [2022-04-06 16:24:32,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:24:32,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:24:32,159 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:24:32,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [960273374] [2022-04-06 16:24:32,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:24:32,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:24:32,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:24:32,166 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:24:32,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 16:24:32,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:24:32,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:24:32,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 16:24:32,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:24:32,278 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 16:24:32,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:24:32,351 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 16:24:32,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:24:32,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894064787] [2022-04-06 16:24:32,351 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:24:32,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960273374] [2022-04-06 16:24:32,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960273374] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:24:32,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:24:32,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-04-06 16:24:32,352 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:24:32,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [274200462] [2022-04-06 16:24:32,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [274200462] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:24:32,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:24:32,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:24:32,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773202183] [2022-04-06 16:24:32,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:24:32,353 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:24:32,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:24:32,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:24:32,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-04-06 16:24:32,353 INFO L87 Difference]: Start difference. First operand 78 states and 109 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-06 16:24:32,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:24:32,388 INFO L93 Difference]: Finished difference Result 121 states and 152 transitions. [2022-04-06 16:24:32,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 16:24:32,388 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2022-04-06 16:24:32,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:24:32,389 INFO L225 Difference]: With dead ends: 121 [2022-04-06 16:24:32,389 INFO L226 Difference]: Without dead ends: 102 [2022-04-06 16:24:32,390 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-04-06 16:24:32,390 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 13 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:24:32,390 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 130 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:24:32,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-04-06 16:24:32,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2022-04-06 16:24:32,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 63 states have internal predecessors, (69), 31 states have call successors, (31), 13 states have call predecessors, (31), 11 states have return successors, (27), 23 states have call predecessors, (27), 27 states have call successors, (27) [2022-04-06 16:24:32,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 127 transitions. [2022-04-06 16:24:32,401 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 127 transitions. Word has length 42 [2022-04-06 16:24:32,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:24:32,401 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 127 transitions. [2022-04-06 16:24:32,401 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-06 16:24:32,401 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 127 transitions. [2022-04-06 16:24:32,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 16:24:32,402 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:24:32,402 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 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] [2022-04-06 16:24:32,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 16:24:32,614 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:24:32,614 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:24:32,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:24:32,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1083409702, now seen corresponding path program 1 times [2022-04-06 16:24:32,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:24:32,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1725426165] [2022-04-06 16:24:32,615 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:24:32,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1083409702, now seen corresponding path program 2 times [2022-04-06 16:24:32,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:24:32,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411560099] [2022-04-06 16:24:32,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:24:32,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:24:32,622 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:24:32,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1023176952] [2022-04-06 16:24:32,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:24:32,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:24:32,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:24:32,624 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:24:32,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 16:24:32,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:24:32,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:24:32,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 16:24:32,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:24:32,788 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-04-06 16:24:32,789 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 16:24:32,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:24:32,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411560099] [2022-04-06 16:24:32,789 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:24:32,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023176952] [2022-04-06 16:24:32,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023176952] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:24:32,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:24:32,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:24:32,789 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:24:32,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1725426165] [2022-04-06 16:24:32,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1725426165] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:24:32,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:24:32,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:24:32,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252639288] [2022-04-06 16:24:32,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:24:32,790 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:24:32,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:24:32,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:24:32,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 16:24:32,791 INFO L87 Difference]: Start difference. First operand 100 states and 127 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 16:24:32,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:24:32,822 INFO L93 Difference]: Finished difference Result 106 states and 132 transitions. [2022-04-06 16:24:32,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 16:24:32,822 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2022-04-06 16:24:32,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:24:32,823 INFO L225 Difference]: With dead ends: 106 [2022-04-06 16:24:32,823 INFO L226 Difference]: Without dead ends: 103 [2022-04-06 16:24:32,823 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 16:24:32,824 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 7 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:24:32,824 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 132 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:24:32,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-04-06 16:24:32,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-04-06 16:24:32,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 60 states have (on average 1.2) internal successors, (72), 66 states have internal predecessors, (72), 30 states have call successors, (30), 14 states have call predecessors, (30), 12 states have return successors, (26), 22 states have call predecessors, (26), 26 states have call successors, (26) [2022-04-06 16:24:32,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2022-04-06 16:24:32,833 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 42 [2022-04-06 16:24:32,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:24:32,833 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2022-04-06 16:24:32,834 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 16:24:32,834 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2022-04-06 16:24:32,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 16:24:32,834 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:24:32,834 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:24:32,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 16:24:33,046 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:24:33,047 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:24:33,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:24:33,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1376219446, now seen corresponding path program 1 times [2022-04-06 16:24:33,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:24:33,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1029148484] [2022-04-06 16:24:33,048 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:24:33,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1376219446, now seen corresponding path program 2 times [2022-04-06 16:24:33,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:24:33,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83902530] [2022-04-06 16:24:33,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:24:33,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:24:33,054 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:24:33,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [142352296] [2022-04-06 16:24:33,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:24:33,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:24:33,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:24:33,057 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:24:33,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 16:24:33,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:24:33,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:24:33,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 16:24:33,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:24:33,181 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-04-06 16:24:33,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:24:33,288 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-04-06 16:24:33,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:24:33,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83902530] [2022-04-06 16:24:33,288 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:24:33,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142352296] [2022-04-06 16:24:33,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142352296] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:24:33,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:24:33,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-04-06 16:24:33,289 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:24:33,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1029148484] [2022-04-06 16:24:33,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1029148484] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:24:33,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:24:33,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 16:24:33,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917629800] [2022-04-06 16:24:33,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:24:33,291 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 16:24:33,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:24:33,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 16:24:33,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-04-06 16:24:33,292 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-06 16:24:33,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:24:33,402 INFO L93 Difference]: Finished difference Result 118 states and 148 transitions. [2022-04-06 16:24:33,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 16:24:33,402 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2022-04-06 16:24:33,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:24:33,403 INFO L225 Difference]: With dead ends: 118 [2022-04-06 16:24:33,403 INFO L226 Difference]: Without dead ends: 106 [2022-04-06 16:24:33,403 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-04-06 16:24:33,404 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 16 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:24:33,404 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 122 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:24:33,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-04-06 16:24:33,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2022-04-06 16:24:33,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 67 states have internal predecessors, (71), 31 states have call successors, (31), 13 states have call predecessors, (31), 12 states have return successors, (28), 23 states have call predecessors, (28), 28 states have call successors, (28) [2022-04-06 16:24:33,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 130 transitions. [2022-04-06 16:24:33,417 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 130 transitions. Word has length 44 [2022-04-06 16:24:33,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:24:33,417 INFO L478 AbstractCegarLoop]: Abstraction has 104 states and 130 transitions. [2022-04-06 16:24:33,417 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-06 16:24:33,417 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 130 transitions. [2022-04-06 16:24:33,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 16:24:33,423 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:24:33,423 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:24:33,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 16:24:33,623 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:24:33,624 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:24:33,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:24:33,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1137310021, now seen corresponding path program 3 times [2022-04-06 16:24:33,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:24:33,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [172063215] [2022-04-06 16:24:33,625 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:24:33,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1137310021, now seen corresponding path program 4 times [2022-04-06 16:24:33,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:24:33,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564209402] [2022-04-06 16:24:33,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:24:33,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:24:33,632 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:24:33,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [807440616] [2022-04-06 16:24:33,633 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:24:33,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:24:33,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:24:33,634 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:24:33,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 16:24:33,686 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:24:33,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:24:33,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 16:24:33,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:24:33,854 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 16:24:33,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:24:33,949 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 16:24:33,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:24:33,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564209402] [2022-04-06 16:24:33,950 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:24:33,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807440616] [2022-04-06 16:24:33,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807440616] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:24:33,950 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:24:33,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-04-06 16:24:33,950 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:24:33,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [172063215] [2022-04-06 16:24:33,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [172063215] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:24:33,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:24:33,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 16:24:33,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496253846] [2022-04-06 16:24:33,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:24:33,951 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 16:24:33,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:24:33,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 16:24:33,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-04-06 16:24:33,952 INFO L87 Difference]: Start difference. First operand 104 states and 130 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-06 16:24:34,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:24:34,031 INFO L93 Difference]: Finished difference Result 131 states and 169 transitions. [2022-04-06 16:24:34,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 16:24:34,031 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 47 [2022-04-06 16:24:34,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:24:34,032 INFO L225 Difference]: With dead ends: 131 [2022-04-06 16:24:34,032 INFO L226 Difference]: Without dead ends: 129 [2022-04-06 16:24:34,033 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-04-06 16:24:34,033 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 9 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:24:34,033 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 168 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:24:34,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-04-06 16:24:34,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 124. [2022-04-06 16:24:34,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 79 states have internal predecessors, (87), 37 states have call successors, (37), 15 states have call predecessors, (37), 14 states have return successors, (34), 29 states have call predecessors, (34), 34 states have call successors, (34) [2022-04-06 16:24:34,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 158 transitions. [2022-04-06 16:24:34,044 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 158 transitions. Word has length 47 [2022-04-06 16:24:34,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:24:34,045 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 158 transitions. [2022-04-06 16:24:34,045 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-06 16:24:34,045 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 158 transitions. [2022-04-06 16:24:34,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 16:24:34,045 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:24:34,045 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:24:34,062 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-04-06 16:24:34,259 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,SelfDestructingSolverStorable9 [2022-04-06 16:24:34,259 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:24:34,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:24:34,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1475439812, now seen corresponding path program 1 times [2022-04-06 16:24:34,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:24:34,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1763539189] [2022-04-06 16:24:34,260 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:24:34,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1475439812, now seen corresponding path program 2 times [2022-04-06 16:24:34,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:24:34,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184894822] [2022-04-06 16:24:34,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:24:34,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:24:34,272 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:24:34,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1338956275] [2022-04-06 16:24:34,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:24:34,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:24:34,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:24:34,284 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:24:34,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 16:24:34,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:24:34,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:24:34,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 16:24:34,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:24:34,558 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 23 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-04-06 16:24:34,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:24:34,757 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 28 proven. 5 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-04-06 16:24:34,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:24:34,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184894822] [2022-04-06 16:24:34,757 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:24:34,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338956275] [2022-04-06 16:24:34,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338956275] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:24:34,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:24:34,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-04-06 16:24:34,758 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:24:34,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1763539189] [2022-04-06 16:24:34,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1763539189] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:24:34,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:24:34,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 16:24:34,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209226354] [2022-04-06 16:24:34,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:24:34,758 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 16:24:34,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:24:34,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 16:24:34,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-04-06 16:24:34,759 INFO L87 Difference]: Start difference. First operand 124 states and 158 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-04-06 16:24:34,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:24:34,960 INFO L93 Difference]: Finished difference Result 160 states and 210 transitions. [2022-04-06 16:24:34,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 16:24:34,961 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 52 [2022-04-06 16:24:34,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:24:34,962 INFO L225 Difference]: With dead ends: 160 [2022-04-06 16:24:34,962 INFO L226 Difference]: Without dead ends: 153 [2022-04-06 16:24:34,962 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-04-06 16:24:34,963 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 21 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 16:24:34,963 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 168 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 16:24:34,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-04-06 16:24:34,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2022-04-06 16:24:34,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 87 states have (on average 1.2183908045977012) internal successors, (106), 96 states have internal predecessors, (106), 48 states have call successors, (48), 18 states have call predecessors, (48), 17 states have return successors, (44), 38 states have call predecessors, (44), 44 states have call successors, (44) [2022-04-06 16:24:34,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 198 transitions. [2022-04-06 16:24:34,978 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 198 transitions. Word has length 52 [2022-04-06 16:24:34,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:24:34,979 INFO L478 AbstractCegarLoop]: Abstraction has 153 states and 198 transitions. [2022-04-06 16:24:34,979 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-04-06 16:24:34,979 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 198 transitions. [2022-04-06 16:24:34,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 16:24:34,979 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:24:34,980 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:24:34,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 16:24:35,196 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:24:35,197 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:24:35,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:24:35,197 INFO L85 PathProgramCache]: Analyzing trace with hash 220857665, now seen corresponding path program 3 times [2022-04-06 16:24:35,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:24:35,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1421400031] [2022-04-06 16:24:35,198 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:24:35,198 INFO L85 PathProgramCache]: Analyzing trace with hash 220857665, now seen corresponding path program 4 times [2022-04-06 16:24:35,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:24:35,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445615948] [2022-04-06 16:24:35,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:24:35,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:24:35,204 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:24:35,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [976598649] [2022-04-06 16:24:35,205 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:24:35,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:24:35,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:24:35,207 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:24:35,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 16:24:35,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:24:35,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:24:35,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 16:24:35,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:24:35,376 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 47 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 16:24:35,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:24:35,486 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 16:24:35,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:24:35,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445615948] [2022-04-06 16:24:35,487 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:24:35,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976598649] [2022-04-06 16:24:35,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976598649] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:24:35,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:24:35,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-04-06 16:24:35,487 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:24:35,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1421400031] [2022-04-06 16:24:35,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1421400031] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:24:35,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:24:35,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 16:24:35,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786443398] [2022-04-06 16:24:35,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:24:35,488 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 16:24:35,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:24:35,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 16:24:35,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-04-06 16:24:35,488 INFO L87 Difference]: Start difference. First operand 153 states and 198 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2022-04-06 16:24:35,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:24:35,534 INFO L93 Difference]: Finished difference Result 199 states and 251 transitions. [2022-04-06 16:24:35,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 16:24:35,535 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 61 [2022-04-06 16:24:35,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:24:35,536 INFO L225 Difference]: With dead ends: 199 [2022-04-06 16:24:35,536 INFO L226 Difference]: Without dead ends: 173 [2022-04-06 16:24:35,536 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-04-06 16:24:35,537 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 15 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:24:35,537 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 136 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:24:35,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-04-06 16:24:35,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2022-04-06 16:24:35,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 104 states have (on average 1.1826923076923077) internal successors, (123), 113 states have internal predecessors, (123), 48 states have call successors, (48), 21 states have call predecessors, (48), 20 states have return successors, (44), 38 states have call predecessors, (44), 44 states have call successors, (44) [2022-04-06 16:24:35,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 215 transitions. [2022-04-06 16:24:35,549 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 215 transitions. Word has length 61 [2022-04-06 16:24:35,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:24:35,550 INFO L478 AbstractCegarLoop]: Abstraction has 173 states and 215 transitions. [2022-04-06 16:24:35,550 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2022-04-06 16:24:35,550 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 215 transitions. [2022-04-06 16:24:35,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 16:24:35,550 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:24:35,550 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:24:35,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 16:24:35,766 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,SelfDestructingSolverStorable11 [2022-04-06 16:24:35,767 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:24:35,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:24:35,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1997533323, now seen corresponding path program 1 times [2022-04-06 16:24:35,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:24:35,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [540321457] [2022-04-06 16:24:35,767 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:24:35,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1997533323, now seen corresponding path program 2 times [2022-04-06 16:24:35,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:24:35,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713232336] [2022-04-06 16:24:35,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:24:35,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:24:35,773 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:24:35,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1266523467] [2022-04-06 16:24:35,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:24:35,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:24:35,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:24:35,775 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:24:35,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 16:24:35,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:24:35,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:24:35,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 16:24:35,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:24:36,006 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 16:24:36,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:24:36,102 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-04-06 16:24:36,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:24:36,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713232336] [2022-04-06 16:24:36,102 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:24:36,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266523467] [2022-04-06 16:24:36,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266523467] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 16:24:36,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:24:36,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2022-04-06 16:24:36,103 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:24:36,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [540321457] [2022-04-06 16:24:36,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [540321457] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:24:36,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:24:36,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:24:36,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859290504] [2022-04-06 16:24:36,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:24:36,103 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:24:36,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:24:36,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:24:36,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-04-06 16:24:36,104 INFO L87 Difference]: Start difference. First operand 173 states and 215 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 16:24:36,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:24:36,141 INFO L93 Difference]: Finished difference Result 179 states and 220 transitions. [2022-04-06 16:24:36,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 16:24:36,142 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 61 [2022-04-06 16:24:36,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:24:36,142 INFO L225 Difference]: With dead ends: 179 [2022-04-06 16:24:36,143 INFO L226 Difference]: Without dead ends: 174 [2022-04-06 16:24:36,143 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 112 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-04-06 16:24:36,143 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 7 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:24:36,143 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 102 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:24:36,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-04-06 16:24:36,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2022-04-06 16:24:36,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 107 states have (on average 1.1682242990654206) internal successors, (125), 114 states have internal predecessors, (125), 43 states have call successors, (43), 22 states have call predecessors, (43), 21 states have return successors, (40), 35 states have call predecessors, (40), 40 states have call successors, (40) [2022-04-06 16:24:36,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 208 transitions. [2022-04-06 16:24:36,162 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 208 transitions. Word has length 61 [2022-04-06 16:24:36,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:24:36,162 INFO L478 AbstractCegarLoop]: Abstraction has 172 states and 208 transitions. [2022-04-06 16:24:36,162 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 16:24:36,162 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 208 transitions. [2022-04-06 16:24:36,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-04-06 16:24:36,164 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:24:36,164 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:24:36,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 16:24:36,377 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,SelfDestructingSolverStorable12 [2022-04-06 16:24:36,377 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:24:36,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:24:36,377 INFO L85 PathProgramCache]: Analyzing trace with hash 404368620, now seen corresponding path program 5 times [2022-04-06 16:24:36,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:24:36,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1305841415] [2022-04-06 16:24:36,378 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:24:36,378 INFO L85 PathProgramCache]: Analyzing trace with hash 404368620, now seen corresponding path program 6 times [2022-04-06 16:24:36,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:24:36,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666132396] [2022-04-06 16:24:36,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:24:36,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:24:36,386 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:24:36,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [685602910] [2022-04-06 16:24:36,386 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:24:36,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:24:36,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:24:36,397 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:24:36,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 16:24:36,448 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 16:24:36,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:24:36,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-06 16:24:36,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:24:36,747 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 25 proven. 22 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-04-06 16:24:36,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:24:37,061 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 29 proven. 18 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-04-06 16:24:37,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:24:37,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666132396] [2022-04-06 16:24:37,062 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:24:37,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685602910] [2022-04-06 16:24:37,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685602910] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:24:37,062 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:24:37,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2022-04-06 16:24:37,062 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:24:37,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1305841415] [2022-04-06 16:24:37,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1305841415] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:24:37,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:24:37,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 16:24:37,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634929726] [2022-04-06 16:24:37,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:24:37,063 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 16:24:37,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:24:37,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 16:24:37,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-04-06 16:24:37,063 INFO L87 Difference]: Start difference. First operand 172 states and 208 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-04-06 16:24:37,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:24:37,254 INFO L93 Difference]: Finished difference Result 199 states and 247 transitions. [2022-04-06 16:24:37,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 16:24:37,254 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 66 [2022-04-06 16:24:37,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:24:37,255 INFO L225 Difference]: With dead ends: 199 [2022-04-06 16:24:37,255 INFO L226 Difference]: Without dead ends: 197 [2022-04-06 16:24:37,256 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-04-06 16:24:37,256 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 16 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 16:24:37,256 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 172 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 16:24:37,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-04-06 16:24:37,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 181. [2022-04-06 16:24:37,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 112 states have (on average 1.1696428571428572) internal successors, (131), 119 states have internal predecessors, (131), 46 states have call successors, (46), 23 states have call predecessors, (46), 22 states have return successors, (43), 38 states have call predecessors, (43), 43 states have call successors, (43) [2022-04-06 16:24:37,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 220 transitions. [2022-04-06 16:24:37,271 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 220 transitions. Word has length 66 [2022-04-06 16:24:37,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:24:37,272 INFO L478 AbstractCegarLoop]: Abstraction has 181 states and 220 transitions. [2022-04-06 16:24:37,272 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-04-06 16:24:37,272 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 220 transitions. [2022-04-06 16:24:37,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-04-06 16:24:37,272 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:24:37,272 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:24:37,290 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-04-06 16:24:37,485 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,SelfDestructingSolverStorable13 [2022-04-06 16:24:37,485 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:24:37,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:24:37,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1105968494, now seen corresponding path program 3 times [2022-04-06 16:24:37,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:24:37,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1816785591] [2022-04-06 16:24:37,487 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:24:37,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1105968494, now seen corresponding path program 4 times [2022-04-06 16:24:37,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:24:37,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383113492] [2022-04-06 16:24:37,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:24:37,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:24:37,496 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:24:37,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [787766826] [2022-04-06 16:24:37,496 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:24:37,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:24:37,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:24:37,507 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:24:37,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 16:24:37,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:24:37,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:24:37,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 16:24:37,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:24:37,821 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 30 proven. 29 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-06 16:24:37,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:24:38,029 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 43 proven. 16 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-06 16:24:38,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:24:38,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383113492] [2022-04-06 16:24:38,029 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:24:38,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787766826] [2022-04-06 16:24:38,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787766826] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:24:38,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:24:38,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2022-04-06 16:24:38,030 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:24:38,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1816785591] [2022-04-06 16:24:38,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1816785591] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:24:38,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:24:38,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 16:24:38,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867348791] [2022-04-06 16:24:38,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:24:38,030 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 16:24:38,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:24:38,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 16:24:38,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-04-06 16:24:38,031 INFO L87 Difference]: Start difference. First operand 181 states and 220 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-04-06 16:24:38,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:24:38,248 INFO L93 Difference]: Finished difference Result 208 states and 259 transitions. [2022-04-06 16:24:38,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 16:24:38,249 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 66 [2022-04-06 16:24:38,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:24:38,250 INFO L225 Difference]: With dead ends: 208 [2022-04-06 16:24:38,250 INFO L226 Difference]: Without dead ends: 206 [2022-04-06 16:24:38,250 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-04-06 16:24:38,250 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 15 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 16:24:38,251 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 198 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 16:24:38,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-04-06 16:24:38,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 190. [2022-04-06 16:24:38,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 117 states have (on average 1.170940170940171) internal successors, (137), 124 states have internal predecessors, (137), 49 states have call successors, (49), 24 states have call predecessors, (49), 23 states have return successors, (46), 41 states have call predecessors, (46), 46 states have call successors, (46) [2022-04-06 16:24:38,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 232 transitions. [2022-04-06 16:24:38,268 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 232 transitions. Word has length 66 [2022-04-06 16:24:38,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:24:38,268 INFO L478 AbstractCegarLoop]: Abstraction has 190 states and 232 transitions. [2022-04-06 16:24:38,268 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-04-06 16:24:38,268 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 232 transitions. [2022-04-06 16:24:38,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-04-06 16:24:38,269 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:24:38,269 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 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] [2022-04-06 16:24:38,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 16:24:38,481 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,SelfDestructingSolverStorable14 [2022-04-06 16:24:38,482 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:24:38,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:24:38,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1181721515, now seen corresponding path program 5 times [2022-04-06 16:24:38,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:24:38,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [799538137] [2022-04-06 16:24:38,482 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:24:38,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1181721515, now seen corresponding path program 6 times [2022-04-06 16:24:38,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:24:38,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636363606] [2022-04-06 16:24:38,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:24:38,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:24:38,491 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:24:38,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [476444611] [2022-04-06 16:24:38,491 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:24:38,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:24:38,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:24:38,497 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:24:38,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 16:24:38,578 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 16:24:38,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:24:38,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 16:24:38,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:24:38,809 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 27 proven. 27 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-04-06 16:24:38,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:24:38,995 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 31 proven. 18 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-04-06 16:24:38,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:24:38,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636363606] [2022-04-06 16:24:38,995 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:24:38,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476444611] [2022-04-06 16:24:38,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476444611] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:24:38,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:24:38,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2022-04-06 16:24:38,996 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:24:38,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [799538137] [2022-04-06 16:24:38,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [799538137] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:24:38,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:24:38,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 16:24:38,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242065651] [2022-04-06 16:24:38,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:24:38,996 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 16:24:38,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:24:38,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 16:24:38,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-04-06 16:24:38,997 INFO L87 Difference]: Start difference. First operand 190 states and 232 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-04-06 16:24:39,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:24:39,185 INFO L93 Difference]: Finished difference Result 214 states and 271 transitions. [2022-04-06 16:24:39,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 16:24:39,186 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 71 [2022-04-06 16:24:39,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:24:39,187 INFO L225 Difference]: With dead ends: 214 [2022-04-06 16:24:39,187 INFO L226 Difference]: Without dead ends: 208 [2022-04-06 16:24:39,187 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-04-06 16:24:39,187 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 14 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 16:24:39,188 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 199 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 16:24:39,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-04-06 16:24:39,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 192. [2022-04-06 16:24:39,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 117 states have (on average 1.170940170940171) internal successors, (137), 125 states have internal predecessors, (137), 51 states have call successors, (51), 24 states have call predecessors, (51), 23 states have return successors, (48), 42 states have call predecessors, (48), 48 states have call successors, (48) [2022-04-06 16:24:39,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 236 transitions. [2022-04-06 16:24:39,205 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 236 transitions. Word has length 71 [2022-04-06 16:24:39,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:24:39,206 INFO L478 AbstractCegarLoop]: Abstraction has 192 states and 236 transitions. [2022-04-06 16:24:39,206 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-04-06 16:24:39,206 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 236 transitions. [2022-04-06 16:24:39,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-04-06 16:24:39,208 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:24:39,208 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 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] [2022-04-06 16:24:39,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 16:24:39,423 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:24:39,423 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:24:39,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:24:39,424 INFO L85 PathProgramCache]: Analyzing trace with hash 787354729, now seen corresponding path program 3 times [2022-04-06 16:24:39,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:24:39,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1500212845] [2022-04-06 16:24:39,424 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:24:39,424 INFO L85 PathProgramCache]: Analyzing trace with hash 787354729, now seen corresponding path program 4 times [2022-04-06 16:24:39,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:24:39,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617631535] [2022-04-06 16:24:39,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:24:39,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:24:39,429 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:24:39,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [308348011] [2022-04-06 16:24:39,429 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:24:39,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:24:39,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:24:39,433 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:24:39,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 16:24:39,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:24:39,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:24:39,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 16:24:39,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:24:39,742 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-04-06 16:24:39,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:24:39,997 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 35 proven. 19 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-04-06 16:24:39,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:24:39,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617631535] [2022-04-06 16:24:39,998 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:24:39,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308348011] [2022-04-06 16:24:39,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308348011] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:24:39,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:24:39,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2022-04-06 16:24:39,998 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:24:39,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1500212845] [2022-04-06 16:24:39,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1500212845] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:24:39,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:24:39,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 16:24:39,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044701737] [2022-04-06 16:24:39,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:24:39,999 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 16:24:39,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:24:39,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 16:24:39,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-04-06 16:24:39,999 INFO L87 Difference]: Start difference. First operand 192 states and 236 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-04-06 16:24:40,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:24:40,256 INFO L93 Difference]: Finished difference Result 219 states and 281 transitions. [2022-04-06 16:24:40,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 16:24:40,257 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 71 [2022-04-06 16:24:40,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:24:40,258 INFO L225 Difference]: With dead ends: 219 [2022-04-06 16:24:40,258 INFO L226 Difference]: Without dead ends: 210 [2022-04-06 16:24:40,258 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-04-06 16:24:40,259 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 16 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 16:24:40,259 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 162 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 16:24:40,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-04-06 16:24:40,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 208. [2022-04-06 16:24:40,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 126 states have (on average 1.1825396825396826) internal successors, (149), 134 states have internal predecessors, (149), 57 states have call successors, (57), 25 states have call predecessors, (57), 24 states have return successors, (54), 48 states have call predecessors, (54), 54 states have call successors, (54) [2022-04-06 16:24:40,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 260 transitions. [2022-04-06 16:24:40,277 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 260 transitions. Word has length 71 [2022-04-06 16:24:40,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:24:40,277 INFO L478 AbstractCegarLoop]: Abstraction has 208 states and 260 transitions. [2022-04-06 16:24:40,277 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-04-06 16:24:40,277 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 260 transitions. [2022-04-06 16:24:40,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-04-06 16:24:40,278 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:24:40,278 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:24:40,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 16:24:40,491 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-06 16:24:40,491 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:24:40,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:24:40,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1898774094, now seen corresponding path program 5 times [2022-04-06 16:24:40,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:24:40,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [608601516] [2022-04-06 16:24:40,492 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:24:40,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1898774094, now seen corresponding path program 6 times [2022-04-06 16:24:40,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:24:40,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595249493] [2022-04-06 16:24:40,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:24:40,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:24:40,498 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:24:40,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [432426925] [2022-04-06 16:24:40,498 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:24:40,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:24:40,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:24:40,499 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:24:40,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 16:24:40,546 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-04-06 16:24:40,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:24:40,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 16:24:40,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:24:40,679 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 18 proven. 135 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 16:24:40,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:24:40,840 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 18 proven. 27 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-04-06 16:24:40,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:24:40,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595249493] [2022-04-06 16:24:40,841 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:24:40,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432426925] [2022-04-06 16:24:40,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432426925] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:24:40,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:24:40,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-04-06 16:24:40,841 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:24:40,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [608601516] [2022-04-06 16:24:40,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [608601516] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:24:40,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:24:40,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 16:24:40,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656521311] [2022-04-06 16:24:40,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:24:40,842 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 16:24:40,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:24:40,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 16:24:40,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-04-06 16:24:40,843 INFO L87 Difference]: Start difference. First operand 208 states and 260 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2022-04-06 16:24:40,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:24:40,914 INFO L93 Difference]: Finished difference Result 277 states and 329 transitions. [2022-04-06 16:24:40,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 16:24:40,914 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 80 [2022-04-06 16:24:40,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:24:40,915 INFO L225 Difference]: With dead ends: 277 [2022-04-06 16:24:40,915 INFO L226 Difference]: Without dead ends: 250 [2022-04-06 16:24:40,916 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-04-06 16:24:40,916 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 10 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:24:40,916 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 163 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:24:40,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-04-06 16:24:40,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 229. [2022-04-06 16:24:40,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 146 states have (on average 1.143835616438356) internal successors, (167), 153 states have internal predecessors, (167), 52 states have call successors, (52), 31 states have call predecessors, (52), 30 states have return successors, (49), 44 states have call predecessors, (49), 49 states have call successors, (49) [2022-04-06 16:24:40,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 268 transitions. [2022-04-06 16:24:40,934 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 268 transitions. Word has length 80 [2022-04-06 16:24:40,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:24:40,936 INFO L478 AbstractCegarLoop]: Abstraction has 229 states and 268 transitions. [2022-04-06 16:24:40,936 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2022-04-06 16:24:40,936 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 268 transitions. [2022-04-06 16:24:40,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-04-06 16:24:40,937 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:24:40,937 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:24:40,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-06 16:24:41,151 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-06 16:24:41,151 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:24:41,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:24:41,152 INFO L85 PathProgramCache]: Analyzing trace with hash 629296923, now seen corresponding path program 7 times [2022-04-06 16:24:41,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:24:41,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [649410998] [2022-04-06 16:24:41,153 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:24:41,153 INFO L85 PathProgramCache]: Analyzing trace with hash 629296923, now seen corresponding path program 8 times [2022-04-06 16:24:41,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:24:41,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108552202] [2022-04-06 16:24:41,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:24:41,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:24:41,162 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:24:41,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [471038231] [2022-04-06 16:24:41,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:24:41,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:24:41,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:24:41,176 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:24:41,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 16:24:41,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:24:41,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:24:41,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 16:24:41,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:24:41,713 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 23 proven. 33 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-04-06 16:24:41,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:24:41,989 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 20 proven. 33 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-04-06 16:24:41,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:24:41,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108552202] [2022-04-06 16:24:41,990 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:24:41,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471038231] [2022-04-06 16:24:41,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471038231] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:24:41,990 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:24:41,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2022-04-06 16:24:41,990 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:24:41,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [649410998] [2022-04-06 16:24:41,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [649410998] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:24:41,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:24:41,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 16:24:41,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141006083] [2022-04-06 16:24:41,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:24:41,991 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 16:24:41,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:24:41,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 16:24:41,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-04-06 16:24:41,992 INFO L87 Difference]: Start difference. First operand 229 states and 268 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 16:24:42,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:24:42,377 INFO L93 Difference]: Finished difference Result 256 states and 307 transitions. [2022-04-06 16:24:42,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 16:24:42,377 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 85 [2022-04-06 16:24:42,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:24:42,379 INFO L225 Difference]: With dead ends: 256 [2022-04-06 16:24:42,379 INFO L226 Difference]: Without dead ends: 254 [2022-04-06 16:24:42,379 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 155 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-04-06 16:24:42,380 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 25 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 16:24:42,380 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 257 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 16:24:42,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-04-06 16:24:42,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 238. [2022-04-06 16:24:42,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 151 states have (on average 1.1456953642384107) internal successors, (173), 158 states have internal predecessors, (173), 55 states have call successors, (55), 32 states have call predecessors, (55), 31 states have return successors, (52), 47 states have call predecessors, (52), 52 states have call successors, (52) [2022-04-06 16:24:42,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 280 transitions. [2022-04-06 16:24:42,401 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 280 transitions. Word has length 85 [2022-04-06 16:24:42,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:24:42,401 INFO L478 AbstractCegarLoop]: Abstraction has 238 states and 280 transitions. [2022-04-06 16:24:42,401 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 16:24:42,401 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 280 transitions. [2022-04-06 16:24:42,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-04-06 16:24:42,402 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:24:42,402 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:24:42,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 16:24:42,615 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:24:42,616 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:24:42,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:24:42,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1330896797, now seen corresponding path program 7 times [2022-04-06 16:24:42,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:24:42,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [753616613] [2022-04-06 16:24:42,616 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:24:42,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1330896797, now seen corresponding path program 8 times [2022-04-06 16:24:42,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:24:42,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133916171] [2022-04-06 16:24:42,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:24:42,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:24:42,623 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:24:42,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [185626799] [2022-04-06 16:24:42,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:24:42,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:24:42,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:24:42,629 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:24:42,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-06 16:24:42,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:24:42,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:24:42,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 16:24:42,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:24:43,243 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 20 proven. 33 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-04-06 16:24:43,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:24:43,649 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 20 proven. 33 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-04-06 16:24:43,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:24:43,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133916171] [2022-04-06 16:24:43,649 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:24:43,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185626799] [2022-04-06 16:24:43,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185626799] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:24:43,650 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:24:43,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2022-04-06 16:24:43,650 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:24:43,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [753616613] [2022-04-06 16:24:43,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [753616613] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:24:43,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:24:43,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 16:24:43,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334735207] [2022-04-06 16:24:43,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:24:43,650 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 16:24:43,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:24:43,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 16:24:43,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-04-06 16:24:43,651 INFO L87 Difference]: Start difference. First operand 238 states and 280 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 16:24:43,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:24:43,950 INFO L93 Difference]: Finished difference Result 286 states and 341 transitions. [2022-04-06 16:24:43,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 16:24:43,951 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 85 [2022-04-06 16:24:43,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:24:43,952 INFO L225 Difference]: With dead ends: 286 [2022-04-06 16:24:43,952 INFO L226 Difference]: Without dead ends: 284 [2022-04-06 16:24:43,952 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-04-06 16:24:43,953 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 9 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 16:24:43,953 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 246 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 16:24:43,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-04-06 16:24:43,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 268. [2022-04-06 16:24:43,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 171 states have (on average 1.1403508771929824) internal successors, (195), 178 states have internal predecessors, (195), 61 states have call successors, (61), 36 states have call predecessors, (61), 35 states have return successors, (58), 53 states have call predecessors, (58), 58 states have call successors, (58) [2022-04-06 16:24:43,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 314 transitions. [2022-04-06 16:24:43,981 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 314 transitions. Word has length 85 [2022-04-06 16:24:43,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:24:43,983 INFO L478 AbstractCegarLoop]: Abstraction has 268 states and 314 transitions. [2022-04-06 16:24:43,983 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 16:24:43,983 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 314 transitions. [2022-04-06 16:24:43,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-04-06 16:24:43,983 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:24:43,984 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:24:44,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-06 16:24:44,200 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:24:44,201 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:24:44,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:24:44,201 INFO L85 PathProgramCache]: Analyzing trace with hash 148216665, now seen corresponding path program 9 times [2022-04-06 16:24:44,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:24:44,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [322798691] [2022-04-06 16:24:44,201 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:24:44,201 INFO L85 PathProgramCache]: Analyzing trace with hash 148216665, now seen corresponding path program 10 times [2022-04-06 16:24:44,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:24:44,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140885283] [2022-04-06 16:24:44,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:24:44,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:24:44,215 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:24:44,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [644930251] [2022-04-06 16:24:44,216 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:24:44,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:24:44,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:24:44,219 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:24:44,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-06 16:24:44,262 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:24:44,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:24:44,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 48 conjunts are in the unsatisfiable core [2022-04-06 16:24:44,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:24:44,745 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 65 proven. 51 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-04-06 16:24:44,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:24:44,955 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 78 proven. 8 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-04-06 16:24:44,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:24:44,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140885283] [2022-04-06 16:24:44,955 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:24:44,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644930251] [2022-04-06 16:24:44,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644930251] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:24:44,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:24:44,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2022-04-06 16:24:44,956 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:24:44,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [322798691] [2022-04-06 16:24:44,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [322798691] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:24:44,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:24:44,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 16:24:44,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135894408] [2022-04-06 16:24:44,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:24:44,956 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 16:24:44,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:24:44,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 16:24:44,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-04-06 16:24:44,957 INFO L87 Difference]: Start difference. First operand 268 states and 314 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 16:24:45,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:24:45,369 INFO L93 Difference]: Finished difference Result 297 states and 355 transitions. [2022-04-06 16:24:45,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 16:24:45,369 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 85 [2022-04-06 16:24:45,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:24:45,371 INFO L225 Difference]: With dead ends: 297 [2022-04-06 16:24:45,371 INFO L226 Difference]: Without dead ends: 295 [2022-04-06 16:24:45,371 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 153 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-04-06 16:24:45,371 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 16 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 16:24:45,371 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 211 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 16:24:45,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-04-06 16:24:45,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 249. [2022-04-06 16:24:45,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 158 states have (on average 1.1455696202531647) internal successors, (181), 165 states have internal predecessors, (181), 58 states have call successors, (58), 33 states have call predecessors, (58), 32 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2022-04-06 16:24:45,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 294 transitions. [2022-04-06 16:24:45,421 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 294 transitions. Word has length 85 [2022-04-06 16:24:45,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:24:45,421 INFO L478 AbstractCegarLoop]: Abstraction has 249 states and 294 transitions. [2022-04-06 16:24:45,421 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 16:24:45,421 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 294 transitions. [2022-04-06 16:24:45,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-04-06 16:24:45,422 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:24:45,422 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:24:45,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-06 16:24:45,638 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:24:45,638 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:24:45,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:24:45,639 INFO L85 PathProgramCache]: Analyzing trace with hash 849816539, now seen corresponding path program 11 times [2022-04-06 16:24:45,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:24:45,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [865127529] [2022-04-06 16:24:45,639 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:24:45,639 INFO L85 PathProgramCache]: Analyzing trace with hash 849816539, now seen corresponding path program 12 times [2022-04-06 16:24:45,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:24:45,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066226471] [2022-04-06 16:24:45,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:24:45,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:24:45,645 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:24:45,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1703874876] [2022-04-06 16:24:45,645 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:24:45,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:24:45,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:24:45,646 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:24:45,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-06 16:24:45,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 16:24:45,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:24:45,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 16:24:45,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:24:45,987 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 66 proven. 33 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2022-04-06 16:24:45,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:24:46,156 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:24:46,158 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:24:49,818 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse5 (+ (* (- 1) c_main_~q~0) c_main_~p~0))) (let ((.cse0 (= c_main_~y~0 0)) (.cse4 (+ c_main_~b~0 (* (- 1) c_main_~q~0 c_main_~x~0))) (.cse1 (* .cse5 c_main_~x~0)) (.cse3 (+ (* (- 1) c_main_~b~0) c_main_~a~0))) (and (let ((.cse6 (div .cse4 c_main_~y~0))) (let ((.cse2 (+ c_main_~r~0 (* (- 1) .cse6)))) (or .cse0 (= (+ .cse1 (* .cse2 c_main_~y~0)) .cse3) (not (= (mod .cse4 c_main_~y~0) 0)) (not (= (+ (* c_main_~q~0 .cse2) 1) (* .cse5 .cse6)))))) (or (not .cse0) (not (= .cse4 0)) (let ((.cse8 (= c_main_~p~0 0)) (.cse7 (+ (* c_main_~q~0 c_main_~r~0) 1))) (and (or (not (= .cse7 0)) (forall ((main_~s~0 Int)) (= (+ (* (+ (* (- 1) c_main_~q~0) c_main_~p~0) c_main_~x~0) (* (+ (* (- 1) main_~s~0) c_main_~r~0) c_main_~y~0)) (+ (* (- 1) c_main_~b~0) c_main_~a~0))) (not .cse8)) (or .cse8 (not (= (mod .cse7 c_main_~p~0) 0)) (= (+ .cse1 (* (+ c_main_~r~0 (* (div .cse7 c_main_~p~0) (- 1))) c_main_~y~0)) .cse3)))))))) is different from true [2022-04-06 16:24:49,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:24:49,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066226471] [2022-04-06 16:24:49,820 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:24:49,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703874876] [2022-04-06 16:24:49,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703874876] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:24:49,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:24:49,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-04-06 16:24:49,820 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:24:49,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [865127529] [2022-04-06 16:24:49,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [865127529] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:24:49,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:24:49,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 16:24:49,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783794756] [2022-04-06 16:24:49,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:24:49,821 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 16:24:49,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:24:49,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 16:24:49,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=143, Unknown=1, NotChecked=24, Total=210 [2022-04-06 16:24:49,821 INFO L87 Difference]: Start difference. First operand 249 states and 294 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 16:24:50,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:24:50,196 INFO L93 Difference]: Finished difference Result 315 states and 392 transitions. [2022-04-06 16:24:50,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 16:24:50,197 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 85 [2022-04-06 16:24:50,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:24:50,198 INFO L225 Difference]: With dead ends: 315 [2022-04-06 16:24:50,198 INFO L226 Difference]: Without dead ends: 309 [2022-04-06 16:24:50,199 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=61, Invalid=214, Unknown=1, NotChecked=30, Total=306 [2022-04-06 16:24:50,200 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 26 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 16:24:50,200 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 192 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 16:24:50,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-04-06 16:24:50,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 265. [2022-04-06 16:24:50,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 167 states have (on average 1.1437125748502994) internal successors, (191), 175 states have internal predecessors, (191), 63 states have call successors, (63), 35 states have call predecessors, (63), 34 states have return successors, (59), 54 states have call predecessors, (59), 59 states have call successors, (59) [2022-04-06 16:24:50,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 313 transitions. [2022-04-06 16:24:50,229 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 313 transitions. Word has length 85 [2022-04-06 16:24:50,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:24:50,230 INFO L478 AbstractCegarLoop]: Abstraction has 265 states and 313 transitions. [2022-04-06 16:24:50,230 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 16:24:50,230 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 313 transitions. [2022-04-06 16:24:50,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-04-06 16:24:50,230 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:24:50,231 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:24:50,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-04-06 16:24:50,448 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-04-06 16:24:50,449 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:24:50,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:24:50,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1358919972, now seen corresponding path program 13 times [2022-04-06 16:24:50,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:24:50,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1160854114] [2022-04-06 16:24:50,449 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:24:50,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1358919972, now seen corresponding path program 14 times [2022-04-06 16:24:50,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:24:50,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447195508] [2022-04-06 16:24:50,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:24:50,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:24:50,462 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:24:50,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1714695405] [2022-04-06 16:24:50,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:24:50,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:24:50,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:24:50,463 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:24:50,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-06 16:24:50,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:24:50,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:24:50,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 16:24:50,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:24:51,166 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-04-06 16:24:51,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:24:51,589 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-04-06 16:24:51,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:24:51,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447195508] [2022-04-06 16:24:51,589 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:24:51,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714695405] [2022-04-06 16:24:51,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714695405] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:24:51,589 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:24:51,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-04-06 16:24:51,590 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:24:51,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1160854114] [2022-04-06 16:24:51,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1160854114] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:24:51,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:24:51,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 16:24:51,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773980194] [2022-04-06 16:24:51,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:24:51,590 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 16:24:51,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:24:51,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 16:24:51,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-04-06 16:24:51,591 INFO L87 Difference]: Start difference. First operand 265 states and 313 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-04-06 16:24:51,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:24:51,913 INFO L93 Difference]: Finished difference Result 291 states and 354 transitions. [2022-04-06 16:24:51,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 16:24:51,914 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 90 [2022-04-06 16:24:51,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:24:51,915 INFO L225 Difference]: With dead ends: 291 [2022-04-06 16:24:51,915 INFO L226 Difference]: Without dead ends: 285 [2022-04-06 16:24:51,916 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-04-06 16:24:51,916 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 10 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 16:24:51,916 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 250 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 16:24:51,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-04-06 16:24:51,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 269. [2022-04-06 16:24:51,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 169 states have (on average 1.1420118343195267) internal successors, (193), 178 states have internal predecessors, (193), 65 states have call successors, (65), 35 states have call predecessors, (65), 34 states have return successors, (61), 55 states have call predecessors, (61), 61 states have call successors, (61) [2022-04-06 16:24:51,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 319 transitions. [2022-04-06 16:24:51,959 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 319 transitions. Word has length 90 [2022-04-06 16:24:51,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:24:51,960 INFO L478 AbstractCegarLoop]: Abstraction has 269 states and 319 transitions. [2022-04-06 16:24:51,960 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-04-06 16:24:51,960 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 319 transitions. [2022-04-06 16:24:51,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-04-06 16:24:51,961 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:24:51,961 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:24:51,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-04-06 16:24:52,183 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-04-06 16:24:52,183 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:24:52,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:24:52,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1753286758, now seen corresponding path program 15 times [2022-04-06 16:24:52,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:24:52,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1799799822] [2022-04-06 16:24:52,186 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:24:52,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1753286758, now seen corresponding path program 16 times [2022-04-06 16:24:52,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:24:52,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605704914] [2022-04-06 16:24:52,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:24:52,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:24:52,194 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:24:52,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1498975007] [2022-04-06 16:24:52,194 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:24:52,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:24:52,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:24:52,195 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:24:52,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-06 16:24:52,235 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:24:52,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:24:52,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 46 conjunts are in the unsatisfiable core [2022-04-06 16:24:52,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:24:52,679 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 70 proven. 60 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2022-04-06 16:24:52,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:24:52,855 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 82 proven. 15 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2022-04-06 16:24:52,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:24:52,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605704914] [2022-04-06 16:24:52,855 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:24:52,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498975007] [2022-04-06 16:24:52,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498975007] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:24:52,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:24:52,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2022-04-06 16:24:52,856 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:24:52,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1799799822] [2022-04-06 16:24:52,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1799799822] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:24:52,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:24:52,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 16:24:52,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036592511] [2022-04-06 16:24:52,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:24:52,856 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 16:24:52,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:24:52,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 16:24:52,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-04-06 16:24:52,857 INFO L87 Difference]: Start difference. First operand 269 states and 319 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-04-06 16:24:53,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:24:53,378 INFO L93 Difference]: Finished difference Result 310 states and 377 transitions. [2022-04-06 16:24:53,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 16:24:53,382 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 90 [2022-04-06 16:24:53,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:24:53,383 INFO L225 Difference]: With dead ends: 310 [2022-04-06 16:24:53,383 INFO L226 Difference]: Without dead ends: 304 [2022-04-06 16:24:53,383 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 164 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-04-06 16:24:53,384 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 15 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 16:24:53,387 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 211 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 16:24:53,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-04-06 16:24:53,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 284. [2022-04-06 16:24:53,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 179 states have (on average 1.1396648044692737) internal successors, (204), 188 states have internal predecessors, (204), 68 states have call successors, (68), 37 states have call predecessors, (68), 36 states have return successors, (64), 58 states have call predecessors, (64), 64 states have call successors, (64) [2022-04-06 16:24:53,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 336 transitions. [2022-04-06 16:24:53,424 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 336 transitions. Word has length 90 [2022-04-06 16:24:53,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:24:53,424 INFO L478 AbstractCegarLoop]: Abstraction has 284 states and 336 transitions. [2022-04-06 16:24:53,425 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-04-06 16:24:53,425 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 336 transitions. [2022-04-06 16:24:53,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-04-06 16:24:53,425 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:24:53,425 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:24:53,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-04-06 16:24:53,641 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:24:53,641 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:24:53,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:24:53,642 INFO L85 PathProgramCache]: Analyzing trace with hash 27865438, now seen corresponding path program 17 times [2022-04-06 16:24:53,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:24:53,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [482240551] [2022-04-06 16:24:53,642 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:24:53,642 INFO L85 PathProgramCache]: Analyzing trace with hash 27865438, now seen corresponding path program 18 times [2022-04-06 16:24:53,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:24:53,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574097696] [2022-04-06 16:24:53,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:24:53,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:24:53,655 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:24:53,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [272623041] [2022-04-06 16:24:53,655 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:24:53,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:24:53,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:24:53,656 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:24:53,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-04-06 16:24:53,756 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 16:24:53,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:24:53,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 16:24:53,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:25:00,129 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 71 proven. 34 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2022-04-06 16:25:00,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:25:00,374 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 90 proven. 5 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-04-06 16:25:00,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:25:00,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574097696] [2022-04-06 16:25:00,374 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:25:00,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272623041] [2022-04-06 16:25:00,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272623041] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:25:00,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:25:00,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 14 [2022-04-06 16:25:00,374 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:25:00,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [482240551] [2022-04-06 16:25:00,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [482240551] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:25:00,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:25:00,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 16:25:00,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927167407] [2022-04-06 16:25:00,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:25:00,375 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 16:25:00,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:25:00,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 16:25:00,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=143, Unknown=1, NotChecked=0, Total=182 [2022-04-06 16:25:00,376 INFO L87 Difference]: Start difference. First operand 284 states and 336 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 4 states have call successors, (11) [2022-04-06 16:25:02,772 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:25:04,779 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:25:06,785 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:25:18,091 WARN L232 SmtUtils]: Spent 10.84s on a formula simplification. DAG size of input: 57 DAG size of output: 39 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 16:25:20,309 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:25:22,540 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:25:24,661 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:25:26,967 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:25:29,045 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:25:29,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:25:29,458 INFO L93 Difference]: Finished difference Result 347 states and 432 transitions. [2022-04-06 16:25:29,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 16:25:29,459 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 4 states have call successors, (11) Word has length 90 [2022-04-06 16:25:29,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:25:29,461 INFO L225 Difference]: With dead ends: 347 [2022-04-06 16:25:29,461 INFO L226 Difference]: Without dead ends: 330 [2022-04-06 16:25:29,461 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 165 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=57, Invalid=214, Unknown=1, NotChecked=0, Total=272 [2022-04-06 16:25:29,462 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 21 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 16 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:25:29,462 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 265 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 574 Invalid, 8 Unknown, 0 Unchecked, 18.1s Time] [2022-04-06 16:25:29,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-04-06 16:25:29,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 321. [2022-04-06 16:25:29,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 204 states have (on average 1.161764705882353) internal successors, (237), 211 states have internal predecessors, (237), 78 states have call successors, (78), 39 states have call predecessors, (78), 38 states have return successors, (74), 70 states have call predecessors, (74), 74 states have call successors, (74) [2022-04-06 16:25:29,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 389 transitions. [2022-04-06 16:25:29,545 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 389 transitions. Word has length 90 [2022-04-06 16:25:29,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:25:29,546 INFO L478 AbstractCegarLoop]: Abstraction has 321 states and 389 transitions. [2022-04-06 16:25:29,547 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 4 states have call successors, (11) [2022-04-06 16:25:29,547 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 389 transitions. [2022-04-06 16:25:29,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-04-06 16:25:29,549 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:25:29,549 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:25:29,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-04-06 16:25:29,749 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:25:29,749 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:25:29,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:25:29,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1449122399, now seen corresponding path program 7 times [2022-04-06 16:25:29,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:25:29,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [599920326] [2022-04-06 16:25:29,750 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:25:29,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1449122399, now seen corresponding path program 8 times [2022-04-06 16:25:29,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:25:29,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771694266] [2022-04-06 16:25:29,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:25:29,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:25:29,757 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:25:29,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1680188331] [2022-04-06 16:25:29,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:25:29,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:25:29,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:25:29,766 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:25:29,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-04-06 16:25:29,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:25:29,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:25:29,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 16:25:29,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:25:30,019 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 24 proven. 266 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-04-06 16:25:30,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:25:30,237 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 24 proven. 50 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-04-06 16:25:30,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:25:30,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771694266] [2022-04-06 16:25:30,237 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:25:30,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680188331] [2022-04-06 16:25:30,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680188331] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:25:30,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:25:30,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-04-06 16:25:30,238 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:25:30,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [599920326] [2022-04-06 16:25:30,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [599920326] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:25:30,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:25:30,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 16:25:30,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862023800] [2022-04-06 16:25:30,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:25:30,238 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 16:25:30,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:25:30,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 16:25:30,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-04-06 16:25:30,239 INFO L87 Difference]: Start difference. First operand 321 states and 389 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2022-04-06 16:25:30,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:25:30,358 INFO L93 Difference]: Finished difference Result 414 states and 490 transitions. [2022-04-06 16:25:30,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 16:25:30,359 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) Word has length 99 [2022-04-06 16:25:30,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:25:30,360 INFO L225 Difference]: With dead ends: 414 [2022-04-06 16:25:30,360 INFO L226 Difference]: Without dead ends: 391 [2022-04-06 16:25:30,361 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=183, Unknown=0, NotChecked=0, Total=306 [2022-04-06 16:25:30,361 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 10 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:25:30,361 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 190 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:25:30,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-04-06 16:25:30,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 376. [2022-04-06 16:25:30,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 246 states have (on average 1.1300813008130082) internal successors, (278), 254 states have internal predecessors, (278), 81 states have call successors, (81), 49 states have call predecessors, (81), 48 states have return successors, (77), 72 states have call predecessors, (77), 77 states have call successors, (77) [2022-04-06 16:25:30,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 436 transitions. [2022-04-06 16:25:30,418 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 436 transitions. Word has length 99 [2022-04-06 16:25:30,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:25:30,418 INFO L478 AbstractCegarLoop]: Abstraction has 376 states and 436 transitions. [2022-04-06 16:25:30,419 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2022-04-06 16:25:30,419 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 436 transitions. [2022-04-06 16:25:30,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-04-06 16:25:30,420 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:25:30,420 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:25:30,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-04-06 16:25:30,635 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-04-06 16:25:30,636 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:25:30,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:25:30,636 INFO L85 PathProgramCache]: Analyzing trace with hash 340347020, now seen corresponding path program 9 times [2022-04-06 16:25:30,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:25:30,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1603612652] [2022-04-06 16:25:30,636 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:25:30,636 INFO L85 PathProgramCache]: Analyzing trace with hash 340347020, now seen corresponding path program 10 times [2022-04-06 16:25:30,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:25:30,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142053199] [2022-04-06 16:25:30,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:25:30,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:25:30,641 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:25:30,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1905601686] [2022-04-06 16:25:30,642 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:25:30,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:25:30,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:25:30,645 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:25:30,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-04-06 16:25:30,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:25:30,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:25:30,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 52 conjunts are in the unsatisfiable core [2022-04-06 16:25:30,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:25:31,482 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 77 proven. 97 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2022-04-06 16:25:31,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:25:31,830 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 108 proven. 27 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2022-04-06 16:25:31,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:25:31,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142053199] [2022-04-06 16:25:31,830 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:25:31,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905601686] [2022-04-06 16:25:31,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905601686] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:25:31,830 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:25:31,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2022-04-06 16:25:31,830 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:25:31,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1603612652] [2022-04-06 16:25:31,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1603612652] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:25:31,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:25:31,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 16:25:31,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927141323] [2022-04-06 16:25:31,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:25:31,831 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 16:25:31,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:25:31,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 16:25:31,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-04-06 16:25:31,832 INFO L87 Difference]: Start difference. First operand 376 states and 436 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-04-06 16:25:33,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:25:33,054 INFO L93 Difference]: Finished difference Result 403 states and 475 transitions. [2022-04-06 16:25:33,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 16:25:33,055 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 104 [2022-04-06 16:25:33,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:25:33,056 INFO L225 Difference]: With dead ends: 403 [2022-04-06 16:25:33,056 INFO L226 Difference]: Without dead ends: 401 [2022-04-06 16:25:33,056 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 189 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2022-04-06 16:25:33,057 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 15 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:25:33,057 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 260 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 16:25:33,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2022-04-06 16:25:33,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 385. [2022-04-06 16:25:33,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 251 states have (on average 1.1314741035856575) internal successors, (284), 259 states have internal predecessors, (284), 84 states have call successors, (84), 50 states have call predecessors, (84), 49 states have return successors, (80), 75 states have call predecessors, (80), 80 states have call successors, (80) [2022-04-06 16:25:33,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 448 transitions. [2022-04-06 16:25:33,114 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 448 transitions. Word has length 104 [2022-04-06 16:25:33,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:25:33,114 INFO L478 AbstractCegarLoop]: Abstraction has 385 states and 448 transitions. [2022-04-06 16:25:33,115 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-04-06 16:25:33,115 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 448 transitions. [2022-04-06 16:25:33,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-04-06 16:25:33,116 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:25:33,116 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:25:33,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-04-06 16:25:33,327 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-04-06 16:25:33,327 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:25:33,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:25:33,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1041946894, now seen corresponding path program 19 times [2022-04-06 16:25:33,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:25:33,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [449270270] [2022-04-06 16:25:33,328 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:25:33,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1041946894, now seen corresponding path program 20 times [2022-04-06 16:25:33,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:25:33,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015722626] [2022-04-06 16:25:33,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:25:33,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:25:33,334 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:25:33,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1385507869] [2022-04-06 16:25:33,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:25:33,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:25:33,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:25:33,335 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:25:33,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-04-06 16:25:33,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:25:33,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:25:33,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 16:25:33,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:25:34,100 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:25:34,137 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 26 proven. 58 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-04-06 16:25:34,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:25:34,789 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 26 proven. 58 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-04-06 16:25:34,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:25:34,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015722626] [2022-04-06 16:25:34,789 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:25:34,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385507869] [2022-04-06 16:25:34,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385507869] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:25:34,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:25:34,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-04-06 16:25:34,790 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:25:34,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [449270270] [2022-04-06 16:25:34,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [449270270] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:25:34,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:25:34,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 16:25:34,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79905137] [2022-04-06 16:25:34,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:25:34,791 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 16:25:34,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:25:34,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 16:25:34,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-04-06 16:25:34,792 INFO L87 Difference]: Start difference. First operand 385 states and 448 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-04-06 16:25:35,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:25:35,280 INFO L93 Difference]: Finished difference Result 433 states and 509 transitions. [2022-04-06 16:25:35,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 16:25:35,281 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 104 [2022-04-06 16:25:35,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:25:35,283 INFO L225 Difference]: With dead ends: 433 [2022-04-06 16:25:35,283 INFO L226 Difference]: Without dead ends: 431 [2022-04-06 16:25:35,283 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 192 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-04-06 16:25:35,283 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 10 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 16:25:35,284 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 296 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 16:25:35,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2022-04-06 16:25:35,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 415. [2022-04-06 16:25:35,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 271 states have (on average 1.1291512915129152) internal successors, (306), 279 states have internal predecessors, (306), 90 states have call successors, (90), 54 states have call predecessors, (90), 53 states have return successors, (86), 81 states have call predecessors, (86), 86 states have call successors, (86) [2022-04-06 16:25:35,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 482 transitions. [2022-04-06 16:25:35,365 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 482 transitions. Word has length 104 [2022-04-06 16:25:35,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:25:35,365 INFO L478 AbstractCegarLoop]: Abstraction has 415 states and 482 transitions. [2022-04-06 16:25:35,365 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-04-06 16:25:35,366 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 482 transitions. [2022-04-06 16:25:35,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-04-06 16:25:35,366 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:25:35,366 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:25:35,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-04-06 16:25:35,583 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-04-06 16:25:35,583 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:25:35,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:25:35,583 INFO L85 PathProgramCache]: Analyzing trace with hash -140733238, now seen corresponding path program 21 times [2022-04-06 16:25:35,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:25:35,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [105637597] [2022-04-06 16:25:35,584 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:25:35,584 INFO L85 PathProgramCache]: Analyzing trace with hash -140733238, now seen corresponding path program 22 times [2022-04-06 16:25:35,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:25:35,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491721034] [2022-04-06 16:25:35,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:25:35,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:25:35,596 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:25:35,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1460190320] [2022-04-06 16:25:35,596 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:25:35,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:25:35,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:25:35,600 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:25:35,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-04-06 16:25:35,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:25:35,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:25:35,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 64 conjunts are in the unsatisfiable core [2022-04-06 16:25:35,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:25:36,415 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 93 proven. 111 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-04-06 16:25:36,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:25:36,628 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 109 proven. 8 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2022-04-06 16:25:36,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:25:36,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491721034] [2022-04-06 16:25:36,628 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:25:36,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460190320] [2022-04-06 16:25:36,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460190320] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:25:36,628 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:25:36,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2022-04-06 16:25:36,629 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:25:36,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [105637597] [2022-04-06 16:25:36,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [105637597] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:25:36,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:25:36,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 16:25:36,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423276082] [2022-04-06 16:25:36,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:25:36,629 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 16:25:36,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:25:36,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 16:25:36,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-04-06 16:25:36,630 INFO L87 Difference]: Start difference. First operand 415 states and 482 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-04-06 16:25:37,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:25:37,038 INFO L93 Difference]: Finished difference Result 462 states and 538 transitions. [2022-04-06 16:25:37,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 16:25:37,039 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 104 [2022-04-06 16:25:37,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:25:37,040 INFO L225 Difference]: With dead ends: 462 [2022-04-06 16:25:37,040 INFO L226 Difference]: Without dead ends: 460 [2022-04-06 16:25:37,041 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 189 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-04-06 16:25:37,041 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 16 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 16:25:37,041 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 246 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 16:25:37,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2022-04-06 16:25:37,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 406. [2022-04-06 16:25:37,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 267 states have (on average 1.1310861423220975) internal successors, (302), 273 states have internal predecessors, (302), 85 states have call successors, (85), 54 states have call predecessors, (85), 53 states have return successors, (81), 78 states have call predecessors, (81), 81 states have call successors, (81) [2022-04-06 16:25:37,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 468 transitions. [2022-04-06 16:25:37,110 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 468 transitions. Word has length 104 [2022-04-06 16:25:37,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:25:37,110 INFO L478 AbstractCegarLoop]: Abstraction has 406 states and 468 transitions. [2022-04-06 16:25:37,110 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-04-06 16:25:37,110 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 468 transitions. [2022-04-06 16:25:37,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-04-06 16:25:37,111 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:25:37,111 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:25:37,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-04-06 16:25:37,327 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-04-06 16:25:37,327 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:25:37,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:25:37,328 INFO L85 PathProgramCache]: Analyzing trace with hash 560866636, now seen corresponding path program 23 times [2022-04-06 16:25:37,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:25:37,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1233447585] [2022-04-06 16:25:37,328 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:25:37,328 INFO L85 PathProgramCache]: Analyzing trace with hash 560866636, now seen corresponding path program 24 times [2022-04-06 16:25:37,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:25:37,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773593011] [2022-04-06 16:25:37,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:25:37,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:25:37,333 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:25:37,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [355130397] [2022-04-06 16:25:37,334 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:25:37,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:25:37,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:25:37,335 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:25:37,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-04-06 16:25:37,754 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-04-06 16:25:37,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:25:37,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 16:25:37,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:25:39,542 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 107 proven. 40 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-04-06 16:25:39,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:25:40,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:25:40,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773593011] [2022-04-06 16:25:40,384 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:25:40,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355130397] [2022-04-06 16:25:40,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355130397] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:25:40,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:25:40,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-04-06 16:25:40,384 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:25:40,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1233447585] [2022-04-06 16:25:40,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1233447585] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:25:40,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:25:40,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 16:25:40,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145475914] [2022-04-06 16:25:40,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:25:40,385 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 16:25:40,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:25:40,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 16:25:40,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2022-04-06 16:25:40,386 INFO L87 Difference]: Start difference. First operand 406 states and 468 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 16:25:44,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:25:44,174 INFO L93 Difference]: Finished difference Result 502 states and 608 transitions. [2022-04-06 16:25:44,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 16:25:44,175 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) Word has length 104 [2022-04-06 16:25:44,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:25:44,177 INFO L225 Difference]: With dead ends: 502 [2022-04-06 16:25:44,177 INFO L226 Difference]: Without dead ends: 496 [2022-04-06 16:25:44,178 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2022-04-06 16:25:44,178 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 40 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 878 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-04-06 16:25:44,179 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 299 Invalid, 911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 878 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-04-06 16:25:44,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2022-04-06 16:25:44,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 464. [2022-04-06 16:25:44,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 303 states have (on average 1.141914191419142) internal successors, (346), 311 states have internal predecessors, (346), 102 states have call successors, (102), 59 states have call predecessors, (102), 58 states have return successors, (98), 93 states have call predecessors, (98), 98 states have call successors, (98) [2022-04-06 16:25:44,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 546 transitions. [2022-04-06 16:25:44,271 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 546 transitions. Word has length 104 [2022-04-06 16:25:44,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:25:44,271 INFO L478 AbstractCegarLoop]: Abstraction has 464 states and 546 transitions. [2022-04-06 16:25:44,271 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 16:25:44,271 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 546 transitions. [2022-04-06 16:25:44,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-04-06 16:25:44,272 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:25:44,272 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:25:44,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-04-06 16:25:44,477 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:25:44,478 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:25:44,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:25:44,478 INFO L85 PathProgramCache]: Analyzing trace with hash -152279154, now seen corresponding path program 25 times [2022-04-06 16:25:44,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:25:44,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1807981446] [2022-04-06 16:25:44,478 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:25:44,478 INFO L85 PathProgramCache]: Analyzing trace with hash -152279154, now seen corresponding path program 26 times [2022-04-06 16:25:44,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:25:44,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993724680] [2022-04-06 16:25:44,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:25:44,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:25:44,486 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:25:44,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1520420521] [2022-04-06 16:25:44,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:25:44,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:25:44,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:25:44,487 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:25:44,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-04-06 16:25:44,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:25:44,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:25:44,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 16:25:44,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:25:48,605 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 75 proven. 75 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2022-04-06 16:25:48,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:25:49,029 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 115 proven. 20 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2022-04-06 16:25:49,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:25:49,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993724680] [2022-04-06 16:25:49,029 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:25:49,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520420521] [2022-04-06 16:25:49,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520420521] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:25:49,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:25:49,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 18 [2022-04-06 16:25:49,030 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:25:49,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1807981446] [2022-04-06 16:25:49,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1807981446] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:25:49,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:25:49,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 16:25:49,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746799491] [2022-04-06 16:25:49,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:25:49,036 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 16:25:49,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:25:49,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 16:25:49,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-04-06 16:25:49,037 INFO L87 Difference]: Start difference. First operand 464 states and 546 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-04-06 16:25:49,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:25:49,771 INFO L93 Difference]: Finished difference Result 493 states and 587 transitions. [2022-04-06 16:25:49,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 16:25:49,772 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 104 [2022-04-06 16:25:49,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:25:49,774 INFO L225 Difference]: With dead ends: 493 [2022-04-06 16:25:49,774 INFO L226 Difference]: Without dead ends: 491 [2022-04-06 16:25:49,775 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 189 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2022-04-06 16:25:49,775 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 15 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 16:25:49,775 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 314 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 16:25:49,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2022-04-06 16:25:49,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 464. [2022-04-06 16:25:49,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 303 states have (on average 1.141914191419142) internal successors, (346), 311 states have internal predecessors, (346), 102 states have call successors, (102), 59 states have call predecessors, (102), 58 states have return successors, (98), 93 states have call predecessors, (98), 98 states have call successors, (98) [2022-04-06 16:25:49,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 546 transitions. [2022-04-06 16:25:49,874 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 546 transitions. Word has length 104 [2022-04-06 16:25:49,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:25:49,874 INFO L478 AbstractCegarLoop]: Abstraction has 464 states and 546 transitions. [2022-04-06 16:25:49,874 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-04-06 16:25:49,874 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 546 transitions. [2022-04-06 16:25:49,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-04-06 16:25:49,875 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:25:49,875 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:25:49,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-04-06 16:25:50,092 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:25:50,093 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:25:50,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:25:50,093 INFO L85 PathProgramCache]: Analyzing trace with hash 549320720, now seen corresponding path program 27 times [2022-04-06 16:25:50,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:25:50,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1335372871] [2022-04-06 16:25:50,093 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:25:50,094 INFO L85 PathProgramCache]: Analyzing trace with hash 549320720, now seen corresponding path program 28 times [2022-04-06 16:25:50,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:25:50,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754739040] [2022-04-06 16:25:50,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:25:50,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:25:50,098 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:25:50,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [779648122] [2022-04-06 16:25:50,099 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:25:50,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:25:50,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:25:50,100 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:25:50,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-04-06 16:25:50,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:25:50,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:25:50,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 52 conjunts are in the unsatisfiable core [2022-04-06 16:25:50,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:25:51,338 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 74 proven. 100 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2022-04-06 16:25:51,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:25:51,888 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 113 proven. 32 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2022-04-06 16:25:51,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:25:51,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754739040] [2022-04-06 16:25:51,888 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:25:51,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779648122] [2022-04-06 16:25:51,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779648122] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:25:51,888 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:25:51,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 19 [2022-04-06 16:25:51,889 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:25:51,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1335372871] [2022-04-06 16:25:51,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1335372871] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:25:51,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:25:51,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 16:25:51,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10966890] [2022-04-06 16:25:51,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:25:51,895 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 16:25:51,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:25:51,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 16:25:51,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-04-06 16:25:51,896 INFO L87 Difference]: Start difference. First operand 464 states and 546 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, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2022-04-06 16:25:53,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:25:53,633 INFO L93 Difference]: Finished difference Result 495 states and 588 transitions. [2022-04-06 16:25:53,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 16:25:53,634 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, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) Word has length 104 [2022-04-06 16:25:53,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:25:53,636 INFO L225 Difference]: With dead ends: 495 [2022-04-06 16:25:53,636 INFO L226 Difference]: Without dead ends: 493 [2022-04-06 16:25:53,637 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 189 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2022-04-06 16:25:53,637 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 15 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-04-06 16:25:53,637 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 290 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-04-06 16:25:53,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2022-04-06 16:25:53,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 466. [2022-04-06 16:25:53,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 304 states have (on average 1.1414473684210527) internal successors, (347), 312 states have internal predecessors, (347), 102 states have call successors, (102), 60 states have call predecessors, (102), 59 states have return successors, (98), 93 states have call predecessors, (98), 98 states have call successors, (98) [2022-04-06 16:25:53,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 547 transitions. [2022-04-06 16:25:53,750 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 547 transitions. Word has length 104 [2022-04-06 16:25:53,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:25:53,750 INFO L478 AbstractCegarLoop]: Abstraction has 466 states and 547 transitions. [2022-04-06 16:25:53,750 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, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2022-04-06 16:25:53,750 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 547 transitions. [2022-04-06 16:25:53,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-04-06 16:25:53,751 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:25:53,751 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:25:53,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-04-06 16:25:53,958 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-04-06 16:25:53,959 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:25:53,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:25:53,959 INFO L85 PathProgramCache]: Analyzing trace with hash -633359412, now seen corresponding path program 29 times [2022-04-06 16:25:53,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:25:53,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [727135166] [2022-04-06 16:25:53,960 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:25:53,960 INFO L85 PathProgramCache]: Analyzing trace with hash -633359412, now seen corresponding path program 30 times [2022-04-06 16:25:53,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:25:53,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180859340] [2022-04-06 16:25:53,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:25:53,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:25:53,977 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:25:53,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1034018985] [2022-04-06 16:25:53,978 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:25:53,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:25:53,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:25:53,979 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:25:53,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-04-06 16:25:54,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 16:25:54,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:25:54,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 40 conjunts are in the unsatisfiable core [2022-04-06 16:25:54,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:25:55,203 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 58 proven. 41 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2022-04-06 16:25:55,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:26:01,515 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 62 proven. 25 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2022-04-06 16:26:01,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:26:01,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180859340] [2022-04-06 16:26:01,516 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:26:01,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034018985] [2022-04-06 16:26:01,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034018985] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:26:01,516 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:26:01,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 18 [2022-04-06 16:26:01,516 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:26:01,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [727135166] [2022-04-06 16:26:01,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [727135166] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:26:01,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:26:01,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 16:26:01,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292861427] [2022-04-06 16:26:01,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:26:01,517 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 16:26:01,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:01,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 16:26:01,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=248, Unknown=2, NotChecked=0, Total=306 [2022-04-06 16:26:01,517 INFO L87 Difference]: Start difference. First operand 466 states and 547 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2022-04-06 16:26:03,793 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:26:04,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:26:04,601 INFO L93 Difference]: Finished difference Result 545 states and 658 transitions. [2022-04-06 16:26:04,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 16:26:04,601 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) Word has length 104 [2022-04-06 16:26:04,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:26:04,603 INFO L225 Difference]: With dead ends: 545 [2022-04-06 16:26:04,603 INFO L226 Difference]: Without dead ends: 543 [2022-04-06 16:26:04,604 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 189 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=73, Invalid=345, Unknown=2, NotChecked=0, Total=420 [2022-04-06 16:26:04,604 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 40 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 26 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-04-06 16:26:04,604 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 202 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 463 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2022-04-06 16:26:04,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2022-04-06 16:26:04,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 455. [2022-04-06 16:26:04,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 295 states have (on average 1.1355932203389831) internal successors, (335), 307 states have internal predecessors, (335), 101 states have call successors, (101), 59 states have call predecessors, (101), 58 states have return successors, (97), 88 states have call predecessors, (97), 97 states have call successors, (97) [2022-04-06 16:26:04,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 533 transitions. [2022-04-06 16:26:04,729 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 533 transitions. Word has length 104 [2022-04-06 16:26:04,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:26:04,730 INFO L478 AbstractCegarLoop]: Abstraction has 455 states and 533 transitions. [2022-04-06 16:26:04,730 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2022-04-06 16:26:04,730 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 533 transitions. [2022-04-06 16:26:04,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-04-06 16:26:04,731 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:26:04,731 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:26:04,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-04-06 16:26:04,937 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:26:04,937 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:26:04,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:26:04,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1283404789, now seen corresponding path program 31 times [2022-04-06 16:26:04,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:04,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1669583345] [2022-04-06 16:26:04,938 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:26:04,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1283404789, now seen corresponding path program 32 times [2022-04-06 16:26:04,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:26:04,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044571858] [2022-04-06 16:26:04,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:26:04,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:26:04,947 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:26:04,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [772864576] [2022-04-06 16:26:04,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:26:04,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:26:04,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:26:04,948 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:26:04,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-04-06 16:26:05,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:26:05,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:26:05,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 16:26:05,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:26:05,527 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 28 proven. 62 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2022-04-06 16:26:05,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:26:05,770 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 28 proven. 62 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2022-04-06 16:26:05,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:26:05,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044571858] [2022-04-06 16:26:05,771 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:26:05,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772864576] [2022-04-06 16:26:05,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772864576] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:26:05,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:26:05,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-04-06 16:26:05,771 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:26:05,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1669583345] [2022-04-06 16:26:05,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1669583345] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:26:05,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:26:05,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 16:26:05,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69981050] [2022-04-06 16:26:05,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:26:05,772 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 16:26:05,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:05,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 16:26:05,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-04-06 16:26:05,772 INFO L87 Difference]: Start difference. First operand 455 states and 533 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 6 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-04-06 16:26:06,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:26:06,187 INFO L93 Difference]: Finished difference Result 481 states and 574 transitions. [2022-04-06 16:26:06,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 16:26:06,187 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 6 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 109 [2022-04-06 16:26:06,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:26:06,189 INFO L225 Difference]: With dead ends: 481 [2022-04-06 16:26:06,189 INFO L226 Difference]: Without dead ends: 475 [2022-04-06 16:26:06,190 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 204 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-04-06 16:26:06,190 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 9 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 16:26:06,190 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 292 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 16:26:06,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-04-06 16:26:06,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 449. [2022-04-06 16:26:06,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 292 states have (on average 1.1369863013698631) internal successors, (332), 303 states have internal predecessors, (332), 99 states have call successors, (99), 58 states have call predecessors, (99), 57 states have return successors, (95), 87 states have call predecessors, (95), 95 states have call successors, (95) [2022-04-06 16:26:06,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 526 transitions. [2022-04-06 16:26:06,302 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 526 transitions. Word has length 109 [2022-04-06 16:26:06,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:26:06,302 INFO L478 AbstractCegarLoop]: Abstraction has 449 states and 526 transitions. [2022-04-06 16:26:06,302 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 6 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-04-06 16:26:06,302 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 526 transitions. [2022-04-06 16:26:06,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-04-06 16:26:06,303 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:26:06,303 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:26:06,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-04-06 16:26:06,519 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:26:06,519 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:26:06,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:26:06,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1677771575, now seen corresponding path program 33 times [2022-04-06 16:26:06,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:06,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [632999935] [2022-04-06 16:26:06,520 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:26:06,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1677771575, now seen corresponding path program 34 times [2022-04-06 16:26:06,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:26:06,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432605239] [2022-04-06 16:26:06,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:26:06,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:26:06,526 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:26:06,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1496732676] [2022-04-06 16:26:06,527 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:26:06,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:26:06,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:26:06,528 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:26:06,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-04-06 16:26:06,589 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:26:06,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:26:06,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 16:26:06,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:26:07,254 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 30 proven. 99 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2022-04-06 16:26:07,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:26:09,355 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 34 proven. 95 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2022-04-06 16:26:09,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:26:09,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432605239] [2022-04-06 16:26:09,356 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:26:09,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496732676] [2022-04-06 16:26:09,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496732676] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:26:09,356 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:26:09,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2022-04-06 16:26:09,356 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:26:09,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [632999935] [2022-04-06 16:26:09,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [632999935] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:26:09,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:26:09,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 16:26:09,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933596939] [2022-04-06 16:26:09,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:26:09,357 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 16:26:09,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:09,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 16:26:09,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-04-06 16:26:09,357 INFO L87 Difference]: Start difference. First operand 449 states and 526 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-04-06 16:26:09,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:26:09,936 INFO L93 Difference]: Finished difference Result 485 states and 576 transitions. [2022-04-06 16:26:09,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 16:26:09,936 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 109 [2022-04-06 16:26:09,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:26:09,938 INFO L225 Difference]: With dead ends: 485 [2022-04-06 16:26:09,939 INFO L226 Difference]: Without dead ends: 479 [2022-04-06 16:26:09,951 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 198 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-04-06 16:26:09,967 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 16 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 16:26:09,967 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 296 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 16:26:09,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-04-06 16:26:10,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 459. [2022-04-06 16:26:10,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 300 states have (on average 1.1366666666666667) internal successors, (341), 310 states have internal predecessors, (341), 99 states have call successors, (99), 60 states have call predecessors, (99), 59 states have return successors, (95), 88 states have call predecessors, (95), 95 states have call successors, (95) [2022-04-06 16:26:10,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 535 transitions. [2022-04-06 16:26:10,095 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 535 transitions. Word has length 109 [2022-04-06 16:26:10,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:26:10,095 INFO L478 AbstractCegarLoop]: Abstraction has 459 states and 535 transitions. [2022-04-06 16:26:10,095 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-04-06 16:26:10,095 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 535 transitions. [2022-04-06 16:26:10,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-04-06 16:26:10,096 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:26:10,096 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:26:10,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-04-06 16:26:10,303 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-04-06 16:26:10,303 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:26:10,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:26:10,304 INFO L85 PathProgramCache]: Analyzing trace with hash 103380621, now seen corresponding path program 35 times [2022-04-06 16:26:10,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:10,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [80853451] [2022-04-06 16:26:10,304 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:26:10,304 INFO L85 PathProgramCache]: Analyzing trace with hash 103380621, now seen corresponding path program 36 times [2022-04-06 16:26:10,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:26:10,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629472449] [2022-04-06 16:26:10,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:26:10,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:26:10,310 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:26:10,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [837752174] [2022-04-06 16:26:10,310 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:26:10,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:26:10,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:26:10,311 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:26:10,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-04-06 16:26:11,060 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 16:26:11,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:26:11,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 16:26:11,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:26:11,383 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 121 proven. 5 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2022-04-06 16:26:11,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:26:11,594 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 121 proven. 5 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2022-04-06 16:26:11,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:26:11,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629472449] [2022-04-06 16:26:11,594 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:26:11,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837752174] [2022-04-06 16:26:11,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837752174] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:26:11,594 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:26:11,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 15 [2022-04-06 16:26:11,594 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:26:11,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [80853451] [2022-04-06 16:26:11,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [80853451] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:26:11,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:26:11,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 16:26:11,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526524679] [2022-04-06 16:26:11,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:26:11,598 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 16:26:11,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:11,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 16:26:11,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-04-06 16:26:11,599 INFO L87 Difference]: Start difference. First operand 459 states and 535 transitions. Second operand has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-04-06 16:26:11,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:26:11,850 INFO L93 Difference]: Finished difference Result 469 states and 543 transitions. [2022-04-06 16:26:11,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 16:26:11,851 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 109 [2022-04-06 16:26:11,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:26:11,852 INFO L225 Difference]: With dead ends: 469 [2022-04-06 16:26:11,852 INFO L226 Difference]: Without dead ends: 448 [2022-04-06 16:26:11,853 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 201 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-04-06 16:26:11,853 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 21 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:26:11,853 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 116 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:26:11,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2022-04-06 16:26:11,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 443. [2022-04-06 16:26:11,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 296 states have (on average 1.125) internal successors, (333), 303 states have internal predecessors, (333), 88 states have call successors, (88), 59 states have call predecessors, (88), 58 states have return successors, (85), 80 states have call predecessors, (85), 85 states have call successors, (85) [2022-04-06 16:26:11,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 506 transitions. [2022-04-06 16:26:11,968 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 506 transitions. Word has length 109 [2022-04-06 16:26:11,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:26:11,969 INFO L478 AbstractCegarLoop]: Abstraction has 443 states and 506 transitions. [2022-04-06 16:26:11,969 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-04-06 16:26:11,969 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 506 transitions. [2022-04-06 16:26:11,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-04-06 16:26:11,970 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:26:11,970 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:26:11,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-04-06 16:26:12,176 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-04-06 16:26:12,177 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:26:12,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:26:12,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1511605586, now seen corresponding path program 9 times [2022-04-06 16:26:12,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:12,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [165312850] [2022-04-06 16:26:12,177 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:26:12,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1511605586, now seen corresponding path program 10 times [2022-04-06 16:26:12,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:26:12,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543462492] [2022-04-06 16:26:12,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:26:12,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:26:12,183 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:26:12,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1810668834] [2022-04-06 16:26:12,184 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:26:12,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:26:12,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:26:12,186 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:26:12,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-04-06 16:26:12,242 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:26:12,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:26:12,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 16:26:12,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:26:12,447 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 30 proven. 440 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 16:26:12,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:26:12,641 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 30 proven. 80 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2022-04-06 16:26:12,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:26:12,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543462492] [2022-04-06 16:26:12,641 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:26:12,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810668834] [2022-04-06 16:26:12,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810668834] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:26:12,642 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:26:12,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-04-06 16:26:12,642 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:26:12,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [165312850] [2022-04-06 16:26:12,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [165312850] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:26:12,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:26:12,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 16:26:12,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97704185] [2022-04-06 16:26:12,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:26:12,642 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 16:26:12,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:12,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 16:26:12,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-04-06 16:26:12,643 INFO L87 Difference]: Start difference. First operand 443 states and 506 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (20), 8 states have call predecessors, (20), 6 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) [2022-04-06 16:26:12,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:26:12,853 INFO L93 Difference]: Finished difference Result 556 states and 641 transitions. [2022-04-06 16:26:12,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 16:26:12,872 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (20), 8 states have call predecessors, (20), 6 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) Word has length 118 [2022-04-06 16:26:12,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:26:12,874 INFO L225 Difference]: With dead ends: 556 [2022-04-06 16:26:12,875 INFO L226 Difference]: Without dead ends: 547 [2022-04-06 16:26:12,878 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=249, Unknown=0, NotChecked=0, Total=420 [2022-04-06 16:26:12,879 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 35 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:26:12,879 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 152 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:26:12,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2022-04-06 16:26:13,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 531. [2022-04-06 16:26:13,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 358 states have (on average 1.111731843575419) internal successors, (398), 366 states have internal predecessors, (398), 102 states have call successors, (102), 71 states have call predecessors, (102), 70 states have return successors, (99), 93 states have call predecessors, (99), 99 states have call successors, (99) [2022-04-06 16:26:13,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 599 transitions. [2022-04-06 16:26:13,029 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 599 transitions. Word has length 118 [2022-04-06 16:26:13,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:26:13,029 INFO L478 AbstractCegarLoop]: Abstraction has 531 states and 599 transitions. [2022-04-06 16:26:13,029 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (20), 8 states have call predecessors, (20), 6 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) [2022-04-06 16:26:13,029 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 599 transitions. [2022-04-06 16:26:13,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-04-06 16:26:13,031 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:26:13,031 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:26:13,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-04-06 16:26:13,236 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-04-06 16:26:13,237 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:26:13,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:26:13,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1126498815, now seen corresponding path program 11 times [2022-04-06 16:26:13,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:13,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1367990268] [2022-04-06 16:26:13,237 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:26:13,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1126498815, now seen corresponding path program 12 times [2022-04-06 16:26:13,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:26:13,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207850262] [2022-04-06 16:26:13,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:26:13,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:26:13,242 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:26:13,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [938516721] [2022-04-06 16:26:13,243 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:26:13,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:26:13,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:26:13,244 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:26:13,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-04-06 16:26:13,312 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-04-06 16:26:13,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:26:13,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 16:26:13,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:26:13,504 INFO L134 CoverageAnalysis]: Checked inductivity of 769 backedges. 36 proven. 657 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-04-06 16:26:13,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:26:13,735 INFO L134 CoverageAnalysis]: Checked inductivity of 769 backedges. 36 proven. 117 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-04-06 16:26:13,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:26:13,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207850262] [2022-04-06 16:26:13,735 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:26:13,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938516721] [2022-04-06 16:26:13,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938516721] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:26:13,735 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:26:13,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-04-06 16:26:13,736 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:26:13,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1367990268] [2022-04-06 16:26:13,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1367990268] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:26:13,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:26:13,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 16:26:13,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172862657] [2022-04-06 16:26:13,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:26:13,738 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 16:26:13,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:13,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 16:26:13,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-04-06 16:26:13,738 INFO L87 Difference]: Start difference. First operand 531 states and 599 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (23), 9 states have call predecessors, (23), 7 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2022-04-06 16:26:14,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:26:14,018 INFO L93 Difference]: Finished difference Result 655 states and 755 transitions. [2022-04-06 16:26:14,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 16:26:14,018 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (23), 9 states have call predecessors, (23), 7 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) Word has length 137 [2022-04-06 16:26:14,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:26:14,020 INFO L225 Difference]: With dead ends: 655 [2022-04-06 16:26:14,021 INFO L226 Difference]: Without dead ends: 646 [2022-04-06 16:26:14,021 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=227, Invalid=325, Unknown=0, NotChecked=0, Total=552 [2022-04-06 16:26:14,021 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 39 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:26:14,021 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 154 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:26:14,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2022-04-06 16:26:14,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 644. [2022-04-06 16:26:14,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 431 states have (on average 1.1090487238979119) internal successors, (478), 442 states have internal predecessors, (478), 129 states have call successors, (129), 84 states have call predecessors, (129), 83 states have return successors, (126), 117 states have call predecessors, (126), 126 states have call successors, (126) [2022-04-06 16:26:14,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 733 transitions. [2022-04-06 16:26:14,235 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 733 transitions. Word has length 137 [2022-04-06 16:26:14,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:26:14,235 INFO L478 AbstractCegarLoop]: Abstraction has 644 states and 733 transitions. [2022-04-06 16:26:14,235 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (23), 9 states have call predecessors, (23), 7 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2022-04-06 16:26:14,235 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 733 transitions. [2022-04-06 16:26:14,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-04-06 16:26:14,237 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:26:14,237 INFO L499 BasicCegarLoop]: trace histogram [22, 21, 21, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:26:14,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-04-06 16:26:14,453 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:26:14,453 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:26:14,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:26:14,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1647300850, now seen corresponding path program 13 times [2022-04-06 16:26:14,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:14,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [141472450] [2022-04-06 16:26:14,454 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:26:14,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1647300850, now seen corresponding path program 14 times [2022-04-06 16:26:14,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:26:14,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250109187] [2022-04-06 16:26:14,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:26:14,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:26:14,461 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:26:14,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1675404414] [2022-04-06 16:26:14,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:26:14,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:26:14,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:26:14,463 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:26:14,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-04-06 16:26:14,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:26:14,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:26:14,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 16:26:14,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:26:14,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1047 backedges. 42 proven. 917 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-04-06 16:26:14,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:26:15,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1047 backedges. 42 proven. 161 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2022-04-06 16:26:15,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:26:15,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250109187] [2022-04-06 16:26:15,088 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:26:15,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675404414] [2022-04-06 16:26:15,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675404414] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:26:15,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:26:15,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-04-06 16:26:15,089 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:26:15,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [141472450] [2022-04-06 16:26:15,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [141472450] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:26:15,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:26:15,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 16:26:15,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879756541] [2022-04-06 16:26:15,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:26:15,089 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 16:26:15,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:15,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 16:26:15,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-04-06 16:26:15,090 INFO L87 Difference]: Start difference. First operand 644 states and 733 transitions. Second operand has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (26), 10 states have call predecessors, (26), 8 states have return successors, (24), 8 states have call predecessors, (24), 9 states have call successors, (24) [2022-04-06 16:26:15,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:26:15,425 INFO L93 Difference]: Finished difference Result 768 states and 889 transitions. [2022-04-06 16:26:15,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 16:26:15,426 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (26), 10 states have call predecessors, (26), 8 states have return successors, (24), 8 states have call predecessors, (24), 9 states have call successors, (24) Word has length 156 [2022-04-06 16:26:15,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:26:15,429 INFO L225 Difference]: With dead ends: 768 [2022-04-06 16:26:15,429 INFO L226 Difference]: Without dead ends: 759 [2022-04-06 16:26:15,429 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=291, Invalid=411, Unknown=0, NotChecked=0, Total=702 [2022-04-06 16:26:15,430 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 21 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:26:15,430 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 176 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:26:15,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2022-04-06 16:26:15,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 757. [2022-04-06 16:26:15,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 504 states have (on average 1.1071428571428572) internal successors, (558), 518 states have internal predecessors, (558), 156 states have call successors, (156), 97 states have call predecessors, (156), 96 states have return successors, (153), 141 states have call predecessors, (153), 153 states have call successors, (153) [2022-04-06 16:26:15,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 867 transitions. [2022-04-06 16:26:15,654 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 867 transitions. Word has length 156 [2022-04-06 16:26:15,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:26:15,654 INFO L478 AbstractCegarLoop]: Abstraction has 757 states and 867 transitions. [2022-04-06 16:26:15,654 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (26), 10 states have call predecessors, (26), 8 states have return successors, (24), 8 states have call predecessors, (24), 9 states have call successors, (24) [2022-04-06 16:26:15,654 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 867 transitions. [2022-04-06 16:26:15,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-04-06 16:26:15,656 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:26:15,656 INFO L499 BasicCegarLoop]: trace histogram [25, 24, 24, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:26:15,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-04-06 16:26:15,873 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-04-06 16:26:15,873 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:26:15,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:26:15,874 INFO L85 PathProgramCache]: Analyzing trace with hash -980382111, now seen corresponding path program 15 times [2022-04-06 16:26:15,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:15,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [398635124] [2022-04-06 16:26:15,874 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:26:15,874 INFO L85 PathProgramCache]: Analyzing trace with hash -980382111, now seen corresponding path program 16 times [2022-04-06 16:26:15,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:26:15,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148080289] [2022-04-06 16:26:15,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:26:15,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:26:15,879 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:26:15,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1725044162] [2022-04-06 16:26:15,880 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:26:15,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:26:15,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:26:15,882 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:26:15,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-04-06 16:26:15,948 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:26:15,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:26:15,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 16:26:15,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:26:16,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 48 proven. 1220 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-04-06 16:26:16,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:26:16,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 48 proven. 212 refuted. 0 times theorem prover too weak. 1108 trivial. 0 not checked. [2022-04-06 16:26:16,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:26:16,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148080289] [2022-04-06 16:26:16,532 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:26:16,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725044162] [2022-04-06 16:26:16,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725044162] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:26:16,532 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:26:16,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-04-06 16:26:16,532 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:26:16,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [398635124] [2022-04-06 16:26:16,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [398635124] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:26:16,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:26:16,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 16:26:16,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526561279] [2022-04-06 16:26:16,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:26:16,533 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 16:26:16,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:16,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 16:26:16,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-04-06 16:26:16,534 INFO L87 Difference]: Start difference. First operand 757 states and 867 transitions. Second operand has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (29), 11 states have call predecessors, (29), 9 states have return successors, (27), 9 states have call predecessors, (27), 10 states have call successors, (27) [2022-04-06 16:26:16,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:26:16,914 INFO L93 Difference]: Finished difference Result 881 states and 1023 transitions. [2022-04-06 16:26:16,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 16:26:16,914 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (29), 11 states have call predecessors, (29), 9 states have return successors, (27), 9 states have call predecessors, (27), 10 states have call successors, (27) Word has length 175 [2022-04-06 16:26:16,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:26:16,917 INFO L225 Difference]: With dead ends: 881 [2022-04-06 16:26:16,918 INFO L226 Difference]: Without dead ends: 872 [2022-04-06 16:26:16,918 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=363, Invalid=507, Unknown=0, NotChecked=0, Total=870 [2022-04-06 16:26:16,919 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 24 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:26:16,919 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 218 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:26:16,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2022-04-06 16:26:17,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 870. [2022-04-06 16:26:17,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 577 states have (on average 1.1057192374350087) internal successors, (638), 594 states have internal predecessors, (638), 183 states have call successors, (183), 110 states have call predecessors, (183), 109 states have return successors, (180), 165 states have call predecessors, (180), 180 states have call successors, (180) [2022-04-06 16:26:17,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 1001 transitions. [2022-04-06 16:26:17,201 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 1001 transitions. Word has length 175 [2022-04-06 16:26:17,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:26:17,201 INFO L478 AbstractCegarLoop]: Abstraction has 870 states and 1001 transitions. [2022-04-06 16:26:17,201 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (29), 11 states have call predecessors, (29), 9 states have return successors, (27), 9 states have call predecessors, (27), 10 states have call successors, (27) [2022-04-06 16:26:17,201 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 1001 transitions. [2022-04-06 16:26:17,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-04-06 16:26:17,203 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:26:17,203 INFO L499 BasicCegarLoop]: trace histogram [28, 27, 27, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:26:17,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-04-06 16:26:17,419 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-04-06 16:26:17,420 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:26:17,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:26:17,420 INFO L85 PathProgramCache]: Analyzing trace with hash -794778478, now seen corresponding path program 17 times [2022-04-06 16:26:17,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:17,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [41611066] [2022-04-06 16:26:17,420 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:26:17,420 INFO L85 PathProgramCache]: Analyzing trace with hash -794778478, now seen corresponding path program 18 times [2022-04-06 16:26:17,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:26:17,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939539021] [2022-04-06 16:26:17,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:26:17,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:26:17,440 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:26:17,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1360042958] [2022-04-06 16:26:17,441 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:26:17,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:26:17,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:26:17,452 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:26:17,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-04-06 16:26:17,590 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-04-06 16:26:17,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:26:17,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 16:26:17,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:26:17,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1732 backedges. 54 proven. 1566 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 16:26:17,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:26:18,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1732 backedges. 54 proven. 270 refuted. 0 times theorem prover too weak. 1408 trivial. 0 not checked. [2022-04-06 16:26:18,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:26:18,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939539021] [2022-04-06 16:26:18,184 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:26:18,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360042958] [2022-04-06 16:26:18,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360042958] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:26:18,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:26:18,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-04-06 16:26:18,184 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:26:18,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [41611066] [2022-04-06 16:26:18,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [41611066] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:26:18,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:26:18,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 16:26:18,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000236655] [2022-04-06 16:26:18,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:26:18,185 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 16:26:18,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:18,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 16:26:18,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-04-06 16:26:18,186 INFO L87 Difference]: Start difference. First operand 870 states and 1001 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (32), 12 states have call predecessors, (32), 10 states have return successors, (30), 10 states have call predecessors, (30), 11 states have call successors, (30) [2022-04-06 16:26:18,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:26:18,651 INFO L93 Difference]: Finished difference Result 994 states and 1157 transitions. [2022-04-06 16:26:18,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 16:26:18,652 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (32), 12 states have call predecessors, (32), 10 states have return successors, (30), 10 states have call predecessors, (30), 11 states have call successors, (30) Word has length 194 [2022-04-06 16:26:18,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:26:18,655 INFO L225 Difference]: With dead ends: 994 [2022-04-06 16:26:18,655 INFO L226 Difference]: Without dead ends: 985 [2022-04-06 16:26:18,655 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 365 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=443, Invalid=613, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 16:26:18,656 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 40 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:26:18,656 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 200 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:26:18,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2022-04-06 16:26:18,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 983. [2022-04-06 16:26:18,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 983 states, 650 states have (on average 1.1046153846153846) internal successors, (718), 670 states have internal predecessors, (718), 210 states have call successors, (210), 123 states have call predecessors, (210), 122 states have return successors, (207), 189 states have call predecessors, (207), 207 states have call successors, (207) [2022-04-06 16:26:18,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 983 states to 983 states and 1135 transitions. [2022-04-06 16:26:18,945 INFO L78 Accepts]: Start accepts. Automaton has 983 states and 1135 transitions. Word has length 194 [2022-04-06 16:26:18,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:26:18,945 INFO L478 AbstractCegarLoop]: Abstraction has 983 states and 1135 transitions. [2022-04-06 16:26:18,945 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (32), 12 states have call predecessors, (32), 10 states have return successors, (30), 10 states have call predecessors, (30), 11 states have call successors, (30) [2022-04-06 16:26:18,945 INFO L276 IsEmpty]: Start isEmpty. Operand 983 states and 1135 transitions. [2022-04-06 16:26:18,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-04-06 16:26:18,947 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:26:18,947 INFO L499 BasicCegarLoop]: trace histogram [31, 30, 30, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:26:18,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-04-06 16:26:19,153 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:26:19,153 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:26:19,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:26:19,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1980311871, now seen corresponding path program 19 times [2022-04-06 16:26:19,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:19,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1382067673] [2022-04-06 16:26:19,154 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:26:19,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1980311871, now seen corresponding path program 20 times [2022-04-06 16:26:19,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:26:19,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706130163] [2022-04-06 16:26:19,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:26:19,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:26:19,161 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:26:19,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1206864703] [2022-04-06 16:26:19,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:26:19,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:26:19,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:26:19,175 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:26:19,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-04-06 16:26:19,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:26:19,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:26:19,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 16:26:19,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:26:19,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2139 backedges. 60 proven. 1955 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-04-06 16:26:19,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:26:19,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2139 backedges. 60 proven. 335 refuted. 0 times theorem prover too weak. 1744 trivial. 0 not checked. [2022-04-06 16:26:19,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:26:19,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706130163] [2022-04-06 16:26:19,885 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:26:19,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206864703] [2022-04-06 16:26:19,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206864703] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:26:19,885 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:26:19,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-04-06 16:26:19,885 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:26:19,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1382067673] [2022-04-06 16:26:19,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1382067673] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:26:19,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:26:19,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 16:26:19,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001102368] [2022-04-06 16:26:19,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:26:19,887 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 16:26:19,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:19,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 16:26:19,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-04-06 16:26:19,887 INFO L87 Difference]: Start difference. First operand 983 states and 1135 transitions. Second operand has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 13 states have call successors, (35), 13 states have call predecessors, (35), 11 states have return successors, (33), 11 states have call predecessors, (33), 12 states have call successors, (33) [2022-04-06 16:26:20,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:26:20,421 INFO L93 Difference]: Finished difference Result 1107 states and 1291 transitions. [2022-04-06 16:26:20,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 16:26:20,421 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 13 states have call successors, (35), 13 states have call predecessors, (35), 11 states have return successors, (33), 11 states have call predecessors, (33), 12 states have call successors, (33) Word has length 213 [2022-04-06 16:26:20,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:26:20,425 INFO L225 Difference]: With dead ends: 1107 [2022-04-06 16:26:20,425 INFO L226 Difference]: Without dead ends: 1098 [2022-04-06 16:26:20,425 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 401 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=531, Invalid=729, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 16:26:20,426 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 40 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:26:20,426 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 212 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:26:20,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1098 states. [2022-04-06 16:26:20,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1098 to 1096. [2022-04-06 16:26:20,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 723 states have (on average 1.103734439834025) internal successors, (798), 746 states have internal predecessors, (798), 237 states have call successors, (237), 136 states have call predecessors, (237), 135 states have return successors, (234), 213 states have call predecessors, (234), 234 states have call successors, (234) [2022-04-06 16:26:20,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 1269 transitions. [2022-04-06 16:26:20,754 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 1269 transitions. Word has length 213 [2022-04-06 16:26:20,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:26:20,755 INFO L478 AbstractCegarLoop]: Abstraction has 1096 states and 1269 transitions. [2022-04-06 16:26:20,755 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 13 states have call successors, (35), 13 states have call predecessors, (35), 11 states have return successors, (33), 11 states have call predecessors, (33), 12 states have call successors, (33) [2022-04-06 16:26:20,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 1269 transitions. [2022-04-06 16:26:20,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-04-06 16:26:20,757 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:26:20,757 INFO L499 BasicCegarLoop]: trace histogram [34, 33, 33, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:26:20,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-04-06 16:26:20,978 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-04-06 16:26:20,978 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:26:20,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:26:20,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1467334706, now seen corresponding path program 21 times [2022-04-06 16:26:20,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:20,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [416205008] [2022-04-06 16:26:20,979 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:26:20,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1467334706, now seen corresponding path program 22 times [2022-04-06 16:26:20,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:26:20,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842100976] [2022-04-06 16:26:20,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:26:20,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:26:20,986 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:26:20,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [492798312] [2022-04-06 16:26:20,986 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:26:20,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:26:20,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:26:20,987 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:26:20,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-04-06 16:26:21,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:26:21,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:26:21,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 16:26:21,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:26:21,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2589 backedges. 66 proven. 2387 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 16:26:21,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:26:21,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2589 backedges. 66 proven. 407 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2022-04-06 16:26:21,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:26:21,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842100976] [2022-04-06 16:26:21,894 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:26:21,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492798312] [2022-04-06 16:26:21,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492798312] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:26:21,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:26:21,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-04-06 16:26:21,895 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:26:21,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [416205008] [2022-04-06 16:26:21,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [416205008] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:26:21,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:26:21,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 16:26:21,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489878072] [2022-04-06 16:26:21,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:26:21,895 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 16:26:21,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:21,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 16:26:21,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-04-06 16:26:21,896 INFO L87 Difference]: Start difference. First operand 1096 states and 1269 transitions. Second operand has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 14 states have internal predecessors, (89), 14 states have call successors, (38), 14 states have call predecessors, (38), 12 states have return successors, (36), 12 states have call predecessors, (36), 13 states have call successors, (36) [2022-04-06 16:26:22,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:26:22,486 INFO L93 Difference]: Finished difference Result 1220 states and 1425 transitions. [2022-04-06 16:26:22,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 16:26:22,487 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 14 states have internal predecessors, (89), 14 states have call successors, (38), 14 states have call predecessors, (38), 12 states have return successors, (36), 12 states have call predecessors, (36), 13 states have call successors, (36) Word has length 232 [2022-04-06 16:26:22,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:26:22,491 INFO L225 Difference]: With dead ends: 1220 [2022-04-06 16:26:22,491 INFO L226 Difference]: Without dead ends: 1211 [2022-04-06 16:26:22,492 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 437 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=627, Invalid=855, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 16:26:22,492 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 49 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 16:26:22,493 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 234 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 16:26:22,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1211 states. [2022-04-06 16:26:22,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1211 to 1209. [2022-04-06 16:26:22,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1209 states, 796 states have (on average 1.1030150753768844) internal successors, (878), 822 states have internal predecessors, (878), 264 states have call successors, (264), 149 states have call predecessors, (264), 148 states have return successors, (261), 237 states have call predecessors, (261), 261 states have call successors, (261) [2022-04-06 16:26:22,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1209 states to 1209 states and 1403 transitions. [2022-04-06 16:26:22,846 INFO L78 Accepts]: Start accepts. Automaton has 1209 states and 1403 transitions. Word has length 232 [2022-04-06 16:26:22,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:26:22,847 INFO L478 AbstractCegarLoop]: Abstraction has 1209 states and 1403 transitions. [2022-04-06 16:26:22,847 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 14 states have internal predecessors, (89), 14 states have call successors, (38), 14 states have call predecessors, (38), 12 states have return successors, (36), 12 states have call predecessors, (36), 13 states have call successors, (36) [2022-04-06 16:26:22,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1209 states and 1403 transitions. [2022-04-06 16:26:22,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-04-06 16:26:22,850 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:26:22,850 INFO L499 BasicCegarLoop]: trace histogram [37, 36, 36, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:26:22,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-04-06 16:26:23,066 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:26:23,067 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:26:23,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:26:23,067 INFO L85 PathProgramCache]: Analyzing trace with hash 2009323297, now seen corresponding path program 23 times [2022-04-06 16:26:23,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:23,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [359840613] [2022-04-06 16:26:23,067 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:26:23,067 INFO L85 PathProgramCache]: Analyzing trace with hash 2009323297, now seen corresponding path program 24 times [2022-04-06 16:26:23,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:26:23,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710630297] [2022-04-06 16:26:23,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:26:23,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:26:23,074 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:26:23,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [100290310] [2022-04-06 16:26:23,074 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:26:23,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:26:23,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:26:23,077 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:26:23,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-04-06 16:26:23,225 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-04-06 16:26:23,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:26:23,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 16:26:23,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:26:23,618 INFO L134 CoverageAnalysis]: Checked inductivity of 3082 backedges. 72 proven. 2862 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-04-06 16:26:23,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:26:24,169 INFO L134 CoverageAnalysis]: Checked inductivity of 3082 backedges. 72 proven. 486 refuted. 0 times theorem prover too weak. 2524 trivial. 0 not checked. [2022-04-06 16:26:24,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:26:24,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710630297] [2022-04-06 16:26:24,170 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:26:24,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100290310] [2022-04-06 16:26:24,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100290310] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:26:24,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:26:24,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2022-04-06 16:26:24,170 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:26:24,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [359840613] [2022-04-06 16:26:24,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [359840613] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:26:24,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:26:24,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 16:26:24,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094916729] [2022-04-06 16:26:24,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:26:24,171 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 16:26:24,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:24,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 16:26:24,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-04-06 16:26:24,171 INFO L87 Difference]: Start difference. First operand 1209 states and 1403 transitions. Second operand has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (41), 15 states have call predecessors, (41), 13 states have return successors, (39), 13 states have call predecessors, (39), 14 states have call successors, (39) [2022-04-06 16:26:24,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:26:24,752 INFO L93 Difference]: Finished difference Result 1333 states and 1559 transitions. [2022-04-06 16:26:24,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 16:26:24,753 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (41), 15 states have call predecessors, (41), 13 states have return successors, (39), 13 states have call predecessors, (39), 14 states have call successors, (39) Word has length 251 [2022-04-06 16:26:24,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:26:24,757 INFO L225 Difference]: With dead ends: 1333 [2022-04-06 16:26:24,757 INFO L226 Difference]: Without dead ends: 1324 [2022-04-06 16:26:24,758 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=731, Invalid=991, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 16:26:24,758 INFO L913 BasicCegarLoop]: 68 mSDtfsCounter, 39 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:26:24,760 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 246 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:26:24,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2022-04-06 16:26:25,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 1322. [2022-04-06 16:26:25,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1322 states, 869 states have (on average 1.1024165707710012) internal successors, (958), 898 states have internal predecessors, (958), 291 states have call successors, (291), 162 states have call predecessors, (291), 161 states have return successors, (288), 261 states have call predecessors, (288), 288 states have call successors, (288) [2022-04-06 16:26:25,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1322 states to 1322 states and 1537 transitions. [2022-04-06 16:26:25,160 INFO L78 Accepts]: Start accepts. Automaton has 1322 states and 1537 transitions. Word has length 251 [2022-04-06 16:26:25,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:26:25,161 INFO L478 AbstractCegarLoop]: Abstraction has 1322 states and 1537 transitions. [2022-04-06 16:26:25,161 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (41), 15 states have call predecessors, (41), 13 states have return successors, (39), 13 states have call predecessors, (39), 14 states have call successors, (39) [2022-04-06 16:26:25,161 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states and 1537 transitions. [2022-04-06 16:26:25,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-04-06 16:26:25,163 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:26:25,163 INFO L499 BasicCegarLoop]: trace histogram [40, 39, 39, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:26:25,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-04-06 16:26:25,379 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:26:25,380 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:26:25,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:26:25,380 INFO L85 PathProgramCache]: Analyzing trace with hash -784784430, now seen corresponding path program 25 times [2022-04-06 16:26:25,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:25,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [435641655] [2022-04-06 16:26:25,380 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:26:25,380 INFO L85 PathProgramCache]: Analyzing trace with hash -784784430, now seen corresponding path program 26 times [2022-04-06 16:26:25,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:26:25,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79220895] [2022-04-06 16:26:25,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:26:25,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:26:25,388 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:26:25,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [824390994] [2022-04-06 16:26:25,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:26:25,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:26:25,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:26:25,390 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:26:25,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-04-06 16:26:25,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:26:25,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:26:25,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 16:26:25,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:26:25,946 INFO L134 CoverageAnalysis]: Checked inductivity of 3618 backedges. 78 proven. 3380 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2022-04-06 16:26:25,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:26:26,280 INFO L134 CoverageAnalysis]: Checked inductivity of 3618 backedges. 78 proven. 572 refuted. 0 times theorem prover too weak. 2968 trivial. 0 not checked. [2022-04-06 16:26:26,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:26:26,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79220895] [2022-04-06 16:26:26,281 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:26:26,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824390994] [2022-04-06 16:26:26,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824390994] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:26:26,281 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:26:26,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2022-04-06 16:26:26,281 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:26:26,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [435641655] [2022-04-06 16:26:26,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [435641655] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:26:26,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:26:26,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 16:26:26,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50656262] [2022-04-06 16:26:26,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:26:26,282 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 16:26:26,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:26,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 16:26:26,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-04-06 16:26:26,282 INFO L87 Difference]: Start difference. First operand 1322 states and 1537 transitions. Second operand has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 16 states have internal predecessors, (103), 16 states have call successors, (44), 16 states have call predecessors, (44), 14 states have return successors, (42), 14 states have call predecessors, (42), 15 states have call successors, (42) [2022-04-06 16:26:26,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:26:26,939 INFO L93 Difference]: Finished difference Result 1446 states and 1693 transitions. [2022-04-06 16:26:26,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 16:26:26,940 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 16 states have internal predecessors, (103), 16 states have call successors, (44), 16 states have call predecessors, (44), 14 states have return successors, (42), 14 states have call predecessors, (42), 15 states have call successors, (42) Word has length 270 [2022-04-06 16:26:26,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:26:26,945 INFO L225 Difference]: With dead ends: 1446 [2022-04-06 16:26:26,946 INFO L226 Difference]: Without dead ends: 1437 [2022-04-06 16:26:26,946 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 552 GetRequests, 509 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=843, Invalid=1137, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 16:26:26,947 INFO L913 BasicCegarLoop]: 71 mSDtfsCounter, 58 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:26:26,947 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 258 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:26:26,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1437 states. [2022-04-06 16:26:27,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1437 to 1435. [2022-04-06 16:26:27,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1435 states, 942 states have (on average 1.1019108280254777) internal successors, (1038), 974 states have internal predecessors, (1038), 318 states have call successors, (318), 175 states have call predecessors, (318), 174 states have return successors, (315), 285 states have call predecessors, (315), 315 states have call successors, (315) [2022-04-06 16:26:27,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1435 states to 1435 states and 1671 transitions. [2022-04-06 16:26:27,433 INFO L78 Accepts]: Start accepts. Automaton has 1435 states and 1671 transitions. Word has length 270 [2022-04-06 16:26:27,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:26:27,434 INFO L478 AbstractCegarLoop]: Abstraction has 1435 states and 1671 transitions. [2022-04-06 16:26:27,434 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 16 states have internal predecessors, (103), 16 states have call successors, (44), 16 states have call predecessors, (44), 14 states have return successors, (42), 14 states have call predecessors, (42), 15 states have call successors, (42) [2022-04-06 16:26:27,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1435 states and 1671 transitions. [2022-04-06 16:26:27,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2022-04-06 16:26:27,437 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:26:27,437 INFO L499 BasicCegarLoop]: trace histogram [43, 42, 42, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:26:27,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-04-06 16:26:27,654 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-04-06 16:26:27,655 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:26:27,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:26:27,655 INFO L85 PathProgramCache]: Analyzing trace with hash 70094721, now seen corresponding path program 27 times [2022-04-06 16:26:27,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:27,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1798445799] [2022-04-06 16:26:27,656 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:26:27,656 INFO L85 PathProgramCache]: Analyzing trace with hash 70094721, now seen corresponding path program 28 times [2022-04-06 16:26:27,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:26:27,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042171831] [2022-04-06 16:26:27,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:26:27,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:26:27,662 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:26:27,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [826841546] [2022-04-06 16:26:27,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:26:27,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:26:27,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:26:27,665 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:26:27,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-04-06 16:26:27,768 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:26:27,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:26:27,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-06 16:26:27,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:26:28,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4197 backedges. 84 proven. 3941 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-04-06 16:26:28,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:26:28,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4197 backedges. 84 proven. 665 refuted. 0 times theorem prover too weak. 3448 trivial. 0 not checked. [2022-04-06 16:26:28,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:26:28,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042171831] [2022-04-06 16:26:28,824 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:26:28,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826841546] [2022-04-06 16:26:28,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826841546] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:26:28,825 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:26:28,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2022-04-06 16:26:28,825 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:26:28,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1798445799] [2022-04-06 16:26:28,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1798445799] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:26:28,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:26:28,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 16:26:28,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875801264] [2022-04-06 16:26:28,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:26:28,826 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 16:26:28,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:28,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 16:26:28,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 16:26:28,826 INFO L87 Difference]: Start difference. First operand 1435 states and 1671 transitions. Second operand has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 17 states have call successors, (47), 17 states have call predecessors, (47), 15 states have return successors, (45), 15 states have call predecessors, (45), 16 states have call successors, (45) [2022-04-06 16:26:29,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:26:29,541 INFO L93 Difference]: Finished difference Result 1559 states and 1827 transitions. [2022-04-06 16:26:29,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 16:26:29,542 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 17 states have call successors, (47), 17 states have call predecessors, (47), 15 states have return successors, (45), 15 states have call predecessors, (45), 16 states have call successors, (45) Word has length 289 [2022-04-06 16:26:29,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:26:29,546 INFO L225 Difference]: With dead ends: 1559 [2022-04-06 16:26:29,546 INFO L226 Difference]: Without dead ends: 1550 [2022-04-06 16:26:29,547 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 545 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=963, Invalid=1293, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 16:26:29,547 INFO L913 BasicCegarLoop]: 74 mSDtfsCounter, 34 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:26:29,547 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 290 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:26:29,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1550 states. [2022-04-06 16:26:30,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1550 to 1548. [2022-04-06 16:26:30,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1548 states, 1015 states have (on average 1.1014778325123153) internal successors, (1118), 1050 states have internal predecessors, (1118), 345 states have call successors, (345), 188 states have call predecessors, (345), 187 states have return successors, (342), 309 states have call predecessors, (342), 342 states have call successors, (342) [2022-04-06 16:26:30,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1548 states to 1548 states and 1805 transitions. [2022-04-06 16:26:30,009 INFO L78 Accepts]: Start accepts. Automaton has 1548 states and 1805 transitions. Word has length 289 [2022-04-06 16:26:30,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:26:30,009 INFO L478 AbstractCegarLoop]: Abstraction has 1548 states and 1805 transitions. [2022-04-06 16:26:30,009 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 17 states have call successors, (47), 17 states have call predecessors, (47), 15 states have return successors, (45), 15 states have call predecessors, (45), 16 states have call successors, (45) [2022-04-06 16:26:30,009 INFO L276 IsEmpty]: Start isEmpty. Operand 1548 states and 1805 transitions. [2022-04-06 16:26:30,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2022-04-06 16:26:30,012 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:26:30,012 INFO L499 BasicCegarLoop]: trace histogram [46, 45, 45, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:26:30,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-04-06 16:26:30,229 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-04-06 16:26:30,229 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:26:30,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:26:30,229 INFO L85 PathProgramCache]: Analyzing trace with hash -520827022, now seen corresponding path program 29 times [2022-04-06 16:26:30,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:30,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1489007963] [2022-04-06 16:26:30,230 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:26:30,230 INFO L85 PathProgramCache]: Analyzing trace with hash -520827022, now seen corresponding path program 30 times [2022-04-06 16:26:30,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:26:30,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940366135] [2022-04-06 16:26:30,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:26:30,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:26:30,241 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:26:30,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [541774379] [2022-04-06 16:26:30,242 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:26:30,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:26:30,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:26:30,256 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:26:30,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-04-06 16:26:30,441 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2022-04-06 16:26:30,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:26:30,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 699 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 16:26:30,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:26:30,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4819 backedges. 90 proven. 4545 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-04-06 16:26:30,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:26:31,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4819 backedges. 90 proven. 765 refuted. 0 times theorem prover too weak. 3964 trivial. 0 not checked. [2022-04-06 16:26:31,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:26:31,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940366135] [2022-04-06 16:26:31,674 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:26:31,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541774379] [2022-04-06 16:26:31,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541774379] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:26:31,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:26:31,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2022-04-06 16:26:31,674 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:26:31,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1489007963] [2022-04-06 16:26:31,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1489007963] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:26:31,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:26:31,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 16:26:31,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718425974] [2022-04-06 16:26:31,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:26:31,675 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 16:26:31,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:31,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 16:26:31,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 16:26:31,676 INFO L87 Difference]: Start difference. First operand 1548 states and 1805 transitions. Second operand has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (50), 18 states have call predecessors, (50), 16 states have return successors, (48), 16 states have call predecessors, (48), 17 states have call successors, (48) [2022-04-06 16:26:32,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:26:32,470 INFO L93 Difference]: Finished difference Result 1672 states and 1961 transitions. [2022-04-06 16:26:32,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 16:26:32,470 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (50), 18 states have call predecessors, (50), 16 states have return successors, (48), 16 states have call predecessors, (48), 17 states have call successors, (48) Word has length 308 [2022-04-06 16:26:32,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:26:32,476 INFO L225 Difference]: With dead ends: 1672 [2022-04-06 16:26:32,476 INFO L226 Difference]: Without dead ends: 1663 [2022-04-06 16:26:32,476 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 630 GetRequests, 581 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1091, Invalid=1459, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 16:26:32,477 INFO L913 BasicCegarLoop]: 77 mSDtfsCounter, 44 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:26:32,477 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 282 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:26:32,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1663 states. [2022-04-06 16:26:32,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1663 to 1661. [2022-04-06 16:26:33,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1661 states, 1088 states have (on average 1.1011029411764706) internal successors, (1198), 1126 states have internal predecessors, (1198), 372 states have call successors, (372), 201 states have call predecessors, (372), 200 states have return successors, (369), 333 states have call predecessors, (369), 369 states have call successors, (369) [2022-04-06 16:26:33,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1661 states to 1661 states and 1939 transitions. [2022-04-06 16:26:33,020 INFO L78 Accepts]: Start accepts. Automaton has 1661 states and 1939 transitions. Word has length 308 [2022-04-06 16:26:33,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:26:33,021 INFO L478 AbstractCegarLoop]: Abstraction has 1661 states and 1939 transitions. [2022-04-06 16:26:33,021 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (50), 18 states have call predecessors, (50), 16 states have return successors, (48), 16 states have call predecessors, (48), 17 states have call successors, (48) [2022-04-06 16:26:33,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1661 states and 1939 transitions. [2022-04-06 16:26:33,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2022-04-06 16:26:33,024 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:26:33,025 INFO L499 BasicCegarLoop]: trace histogram [49, 48, 48, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:26:33,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-04-06 16:26:33,225 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-04-06 16:26:33,225 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:26:33,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:26:33,226 INFO L85 PathProgramCache]: Analyzing trace with hash 199884769, now seen corresponding path program 31 times [2022-04-06 16:26:33,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:33,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [136366406] [2022-04-06 16:26:33,226 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:26:33,226 INFO L85 PathProgramCache]: Analyzing trace with hash 199884769, now seen corresponding path program 32 times [2022-04-06 16:26:33,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:26:33,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371829599] [2022-04-06 16:26:33,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:26:33,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:26:33,234 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:26:33,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [835055007] [2022-04-06 16:26:33,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:26:33,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:26:33,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:26:33,248 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:26:33,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-04-06 16:26:33,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:26:33,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:26:33,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 739 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 16:26:33,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:26:33,805 INFO L134 CoverageAnalysis]: Checked inductivity of 5484 backedges. 96 proven. 5192 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-04-06 16:26:33,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:26:34,208 INFO L134 CoverageAnalysis]: Checked inductivity of 5484 backedges. 96 proven. 872 refuted. 0 times theorem prover too weak. 4516 trivial. 0 not checked. [2022-04-06 16:26:34,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:26:34,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371829599] [2022-04-06 16:26:34,208 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:26:34,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835055007] [2022-04-06 16:26:34,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835055007] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:26:34,209 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:26:34,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2022-04-06 16:26:34,209 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:26:34,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [136366406] [2022-04-06 16:26:34,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [136366406] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:26:34,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:26:34,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 16:26:34,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30957034] [2022-04-06 16:26:34,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:26:34,210 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 16:26:34,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:34,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 16:26:34,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 16:26:34,211 INFO L87 Difference]: Start difference. First operand 1661 states and 1939 transitions. Second operand has 20 states, 20 states have (on average 6.2) internal successors, (124), 19 states have internal predecessors, (124), 19 states have call successors, (53), 19 states have call predecessors, (53), 17 states have return successors, (51), 17 states have call predecessors, (51), 18 states have call successors, (51) [2022-04-06 16:26:34,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:26:34,971 INFO L93 Difference]: Finished difference Result 1785 states and 2095 transitions. [2022-04-06 16:26:34,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 16:26:34,971 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 6.2) internal successors, (124), 19 states have internal predecessors, (124), 19 states have call successors, (53), 19 states have call predecessors, (53), 17 states have return successors, (51), 17 states have call predecessors, (51), 18 states have call successors, (51) Word has length 327 [2022-04-06 16:26:34,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:26:34,976 INFO L225 Difference]: With dead ends: 1785 [2022-04-06 16:26:34,977 INFO L226 Difference]: Without dead ends: 1776 [2022-04-06 16:26:34,977 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 669 GetRequests, 617 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1227, Invalid=1635, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 16:26:34,978 INFO L913 BasicCegarLoop]: 80 mSDtfsCounter, 47 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:26:34,978 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 304 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:26:34,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1776 states. [2022-04-06 16:26:35,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1776 to 1774. [2022-04-06 16:26:35,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1774 states, 1161 states have (on average 1.1007751937984496) internal successors, (1278), 1202 states have internal predecessors, (1278), 399 states have call successors, (399), 214 states have call predecessors, (399), 213 states have return successors, (396), 357 states have call predecessors, (396), 396 states have call successors, (396) [2022-04-06 16:26:35,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1774 states to 1774 states and 2073 transitions. [2022-04-06 16:26:35,552 INFO L78 Accepts]: Start accepts. Automaton has 1774 states and 2073 transitions. Word has length 327 [2022-04-06 16:26:35,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:26:35,553 INFO L478 AbstractCegarLoop]: Abstraction has 1774 states and 2073 transitions. [2022-04-06 16:26:35,553 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.2) internal successors, (124), 19 states have internal predecessors, (124), 19 states have call successors, (53), 19 states have call predecessors, (53), 17 states have return successors, (51), 17 states have call predecessors, (51), 18 states have call successors, (51) [2022-04-06 16:26:35,553 INFO L276 IsEmpty]: Start isEmpty. Operand 1774 states and 2073 transitions. [2022-04-06 16:26:35,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2022-04-06 16:26:35,556 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:26:35,556 INFO L499 BasicCegarLoop]: trace histogram [52, 51, 51, 18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:26:35,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-04-06 16:26:35,771 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:26:35,771 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:26:35,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:26:35,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1842167022, now seen corresponding path program 33 times [2022-04-06 16:26:35,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:35,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1445116706] [2022-04-06 16:26:35,772 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:26:35,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1842167022, now seen corresponding path program 34 times [2022-04-06 16:26:35,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:26:35,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111998841] [2022-04-06 16:26:35,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:26:35,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:26:35,780 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:26:35,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [454589844] [2022-04-06 16:26:35,781 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:26:35,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:26:35,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:26:35,783 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:26:35,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-04-06 16:26:35,909 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:26:35,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:26:35,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 16:26:35,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:26:36,392 INFO L134 CoverageAnalysis]: Checked inductivity of 6192 backedges. 102 proven. 5882 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2022-04-06 16:26:36,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:26:36,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6192 backedges. 102 proven. 986 refuted. 0 times theorem prover too weak. 5104 trivial. 0 not checked. [2022-04-06 16:26:36,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:26:36,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111998841] [2022-04-06 16:26:36,803 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:26:36,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454589844] [2022-04-06 16:26:36,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454589844] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:26:36,803 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:26:36,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2022-04-06 16:26:36,804 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:26:36,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1445116706] [2022-04-06 16:26:36,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1445116706] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:26:36,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:26:36,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 16:26:36,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038573194] [2022-04-06 16:26:36,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:26:36,804 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 16:26:36,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:36,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 16:26:36,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=852, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 16:26:36,805 INFO L87 Difference]: Start difference. First operand 1774 states and 2073 transitions. Second operand has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (56), 20 states have call predecessors, (56), 18 states have return successors, (54), 18 states have call predecessors, (54), 19 states have call successors, (54) [2022-04-06 16:26:37,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:26:37,709 INFO L93 Difference]: Finished difference Result 1898 states and 2229 transitions. [2022-04-06 16:26:37,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 16:26:37,723 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (56), 20 states have call predecessors, (56), 18 states have return successors, (54), 18 states have call predecessors, (54), 19 states have call successors, (54) Word has length 346 [2022-04-06 16:26:37,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:26:37,729 INFO L225 Difference]: With dead ends: 1898 [2022-04-06 16:26:37,729 INFO L226 Difference]: Without dead ends: 1889 [2022-04-06 16:26:37,730 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 708 GetRequests, 653 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1371, Invalid=1821, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 16:26:37,731 INFO L913 BasicCegarLoop]: 83 mSDtfsCounter, 75 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 16:26:37,731 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 316 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 16:26:37,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1889 states. [2022-04-06 16:26:38,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1889 to 1887. [2022-04-06 16:26:38,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1887 states, 1234 states have (on average 1.100486223662885) internal successors, (1358), 1278 states have internal predecessors, (1358), 426 states have call successors, (426), 227 states have call predecessors, (426), 226 states have return successors, (423), 381 states have call predecessors, (423), 423 states have call successors, (423) [2022-04-06 16:26:38,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1887 states to 1887 states and 2207 transitions. [2022-04-06 16:26:38,348 INFO L78 Accepts]: Start accepts. Automaton has 1887 states and 2207 transitions. Word has length 346 [2022-04-06 16:26:38,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:26:38,348 INFO L478 AbstractCegarLoop]: Abstraction has 1887 states and 2207 transitions. [2022-04-06 16:26:38,348 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (56), 20 states have call predecessors, (56), 18 states have return successors, (54), 18 states have call predecessors, (54), 19 states have call successors, (54) [2022-04-06 16:26:38,348 INFO L276 IsEmpty]: Start isEmpty. Operand 1887 states and 2207 transitions. [2022-04-06 16:26:38,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2022-04-06 16:26:38,352 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:26:38,352 INFO L499 BasicCegarLoop]: trace histogram [55, 54, 54, 19, 18, 18, 18, 18, 18, 18, 18, 18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:26:38,369 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-04-06 16:26:38,567 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-04-06 16:26:38,568 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:26:38,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:26:38,568 INFO L85 PathProgramCache]: Analyzing trace with hash 858728513, now seen corresponding path program 35 times [2022-04-06 16:26:38,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:38,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [928487592] [2022-04-06 16:26:38,569 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:26:38,569 INFO L85 PathProgramCache]: Analyzing trace with hash 858728513, now seen corresponding path program 36 times [2022-04-06 16:26:38,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:26:38,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616183845] [2022-04-06 16:26:38,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:26:38,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:26:38,576 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:26:38,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1525546478] [2022-04-06 16:26:38,576 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:26:38,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:26:38,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:26:38,577 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:26:38,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-04-06 16:26:40,486 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2022-04-06 16:26:40,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:26:40,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 819 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 16:26:40,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:26:41,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6943 backedges. 108 proven. 6615 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 16:26:41,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:26:41,784 INFO L134 CoverageAnalysis]: Checked inductivity of 6943 backedges. 108 proven. 1107 refuted. 0 times theorem prover too weak. 5728 trivial. 0 not checked. [2022-04-06 16:26:41,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:26:41,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616183845] [2022-04-06 16:26:41,785 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:26:41,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525546478] [2022-04-06 16:26:41,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525546478] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:26:41,785 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:26:41,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2022-04-06 16:26:41,785 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:26:41,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [928487592] [2022-04-06 16:26:41,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [928487592] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:26:41,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:26:41,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 16:26:41,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201441311] [2022-04-06 16:26:41,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:26:41,786 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 16:26:41,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:41,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 16:26:41,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=937, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 16:26:41,787 INFO L87 Difference]: Start difference. First operand 1887 states and 2207 transitions. Second operand has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 21 states have call successors, (59), 21 states have call predecessors, (59), 19 states have return successors, (57), 19 states have call predecessors, (57), 20 states have call successors, (57) [2022-04-06 16:26:42,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:26:42,694 INFO L93 Difference]: Finished difference Result 2011 states and 2363 transitions. [2022-04-06 16:26:42,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 16:26:42,695 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 21 states have call successors, (59), 21 states have call predecessors, (59), 19 states have return successors, (57), 19 states have call predecessors, (57), 20 states have call successors, (57) Word has length 365 [2022-04-06 16:26:42,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:26:42,701 INFO L225 Difference]: With dead ends: 2011 [2022-04-06 16:26:42,702 INFO L226 Difference]: Without dead ends: 2002 [2022-04-06 16:26:42,703 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 747 GetRequests, 689 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1523, Invalid=2017, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 16:26:42,703 INFO L913 BasicCegarLoop]: 86 mSDtfsCounter, 89 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 16:26:42,703 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 318 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 16:26:42,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2002 states. [2022-04-06 16:26:43,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2002 to 2000. [2022-04-06 16:26:43,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2000 states, 1307 states have (on average 1.100229533282326) internal successors, (1438), 1354 states have internal predecessors, (1438), 453 states have call successors, (453), 240 states have call predecessors, (453), 239 states have return successors, (450), 405 states have call predecessors, (450), 450 states have call successors, (450) [2022-04-06 16:26:43,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2000 states to 2000 states and 2341 transitions. [2022-04-06 16:26:43,327 INFO L78 Accepts]: Start accepts. Automaton has 2000 states and 2341 transitions. Word has length 365 [2022-04-06 16:26:43,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:26:43,327 INFO L478 AbstractCegarLoop]: Abstraction has 2000 states and 2341 transitions. [2022-04-06 16:26:43,327 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 21 states have call successors, (59), 21 states have call predecessors, (59), 19 states have return successors, (57), 19 states have call predecessors, (57), 20 states have call successors, (57) [2022-04-06 16:26:43,327 INFO L276 IsEmpty]: Start isEmpty. Operand 2000 states and 2341 transitions. [2022-04-06 16:26:43,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2022-04-06 16:26:43,332 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:26:43,332 INFO L499 BasicCegarLoop]: trace histogram [58, 57, 57, 20, 19, 19, 19, 19, 19, 19, 19, 19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:26:43,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-04-06 16:26:43,539 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-04-06 16:26:43,539 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:26:43,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:26:43,541 INFO L85 PathProgramCache]: Analyzing trace with hash -117637454, now seen corresponding path program 37 times [2022-04-06 16:26:43,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:43,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1023962556] [2022-04-06 16:26:43,541 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:26:43,542 INFO L85 PathProgramCache]: Analyzing trace with hash -117637454, now seen corresponding path program 38 times [2022-04-06 16:26:43,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:26:43,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772419895] [2022-04-06 16:26:43,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:26:43,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:26:43,549 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:26:43,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1945470562] [2022-04-06 16:26:43,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:26:43,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:26:43,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:26:43,550 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:26:43,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-04-06 16:26:43,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:26:43,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:26:43,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 859 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 16:26:43,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:26:44,122 INFO L134 CoverageAnalysis]: Checked inductivity of 7737 backedges. 114 proven. 7391 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2022-04-06 16:26:44,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:26:44,610 INFO L134 CoverageAnalysis]: Checked inductivity of 7737 backedges. 114 proven. 1235 refuted. 0 times theorem prover too weak. 6388 trivial. 0 not checked. [2022-04-06 16:26:44,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:26:44,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772419895] [2022-04-06 16:26:44,610 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:26:44,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945470562] [2022-04-06 16:26:44,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945470562] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:26:44,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:26:44,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2022-04-06 16:26:44,611 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:26:44,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1023962556] [2022-04-06 16:26:44,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1023962556] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:26:44,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:26:44,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 16:26:44,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140002581] [2022-04-06 16:26:44,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:26:44,612 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 16:26:44,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:44,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 16:26:44,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=1026, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 16:26:44,614 INFO L87 Difference]: Start difference. First operand 2000 states and 2341 transitions. Second operand has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 22 states have call successors, (62), 22 states have call predecessors, (62), 20 states have return successors, (60), 20 states have call predecessors, (60), 21 states have call successors, (60) [2022-04-06 16:26:45,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:26:45,592 INFO L93 Difference]: Finished difference Result 2124 states and 2497 transitions. [2022-04-06 16:26:45,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 16:26:45,593 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 22 states have call successors, (62), 22 states have call predecessors, (62), 20 states have return successors, (60), 20 states have call predecessors, (60), 21 states have call successors, (60) Word has length 384 [2022-04-06 16:26:45,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:26:45,599 INFO L225 Difference]: With dead ends: 2124 [2022-04-06 16:26:45,599 INFO L226 Difference]: Without dead ends: 2115 [2022-04-06 16:26:45,600 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 786 GetRequests, 725 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1683, Invalid=2223, Unknown=0, NotChecked=0, Total=3906 [2022-04-06 16:26:45,600 INFO L913 BasicCegarLoop]: 89 mSDtfsCounter, 57 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 16:26:45,600 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 340 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 16:26:45,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2115 states. [2022-04-06 16:26:46,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2115 to 2113. [2022-04-06 16:26:46,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2113 states, 1380 states have (on average 1.1) internal successors, (1518), 1430 states have internal predecessors, (1518), 480 states have call successors, (480), 253 states have call predecessors, (480), 252 states have return successors, (477), 429 states have call predecessors, (477), 477 states have call successors, (477) [2022-04-06 16:26:46,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 2475 transitions. [2022-04-06 16:26:46,287 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 2475 transitions. Word has length 384 [2022-04-06 16:26:46,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:26:46,288 INFO L478 AbstractCegarLoop]: Abstraction has 2113 states and 2475 transitions. [2022-04-06 16:26:46,288 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 22 states have call successors, (62), 22 states have call predecessors, (62), 20 states have return successors, (60), 20 states have call predecessors, (60), 21 states have call successors, (60) [2022-04-06 16:26:46,288 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 2475 transitions. [2022-04-06 16:26:46,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2022-04-06 16:26:46,310 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:26:46,310 INFO L499 BasicCegarLoop]: trace histogram [61, 60, 60, 21, 20, 20, 20, 20, 20, 20, 20, 20, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:26:46,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-04-06 16:26:46,510 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:26:46,511 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:26:46,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:26:46,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1169361057, now seen corresponding path program 39 times [2022-04-06 16:26:46,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:46,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1768666910] [2022-04-06 16:26:46,512 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:26:46,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1169361057, now seen corresponding path program 40 times [2022-04-06 16:26:46,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:26:46,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133188029] [2022-04-06 16:26:46,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:26:46,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:26:46,522 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:26:46,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1100245113] [2022-04-06 16:26:46,522 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:26:46,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:26:46,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:26:46,523 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:26:46,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-04-06 16:26:46,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:26:46,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:26:46,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 899 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 16:26:46,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:26:47,209 INFO L134 CoverageAnalysis]: Checked inductivity of 8574 backedges. 120 proven. 8210 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2022-04-06 16:26:47,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:26:47,898 INFO L134 CoverageAnalysis]: Checked inductivity of 8574 backedges. 120 proven. 1370 refuted. 0 times theorem prover too weak. 7084 trivial. 0 not checked. [2022-04-06 16:26:47,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:26:47,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133188029] [2022-04-06 16:26:47,898 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:26:47,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100245113] [2022-04-06 16:26:47,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100245113] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:26:47,899 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:26:47,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2022-04-06 16:26:47,899 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:26:47,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1768666910] [2022-04-06 16:26:47,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1768666910] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:26:47,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:26:47,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 16:26:47,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994606202] [2022-04-06 16:26:47,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:26:47,900 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 16:26:47,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:47,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 16:26:47,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 16:26:47,901 INFO L87 Difference]: Start difference. First operand 2113 states and 2475 transitions. Second operand has 24 states, 24 states have (on average 6.333333333333333) internal successors, (152), 23 states have internal predecessors, (152), 23 states have call successors, (65), 23 states have call predecessors, (65), 21 states have return successors, (63), 21 states have call predecessors, (63), 22 states have call successors, (63) [2022-04-06 16:26:48,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:26:48,876 INFO L93 Difference]: Finished difference Result 2237 states and 2631 transitions. [2022-04-06 16:26:48,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-06 16:26:48,877 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 6.333333333333333) internal successors, (152), 23 states have internal predecessors, (152), 23 states have call successors, (65), 23 states have call predecessors, (65), 21 states have return successors, (63), 21 states have call predecessors, (63), 22 states have call successors, (63) Word has length 403 [2022-04-06 16:26:48,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:26:48,897 INFO L225 Difference]: With dead ends: 2237 [2022-04-06 16:26:48,897 INFO L226 Difference]: Without dead ends: 2228 [2022-04-06 16:26:48,898 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 825 GetRequests, 761 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1851, Invalid=2439, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 16:26:48,898 INFO L913 BasicCegarLoop]: 92 mSDtfsCounter, 67 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 16:26:48,898 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 352 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 16:26:48,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2228 states. [2022-04-06 16:26:49,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2228 to 2226. [2022-04-06 16:26:49,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2226 states, 1453 states have (on average 1.0997935306262905) internal successors, (1598), 1506 states have internal predecessors, (1598), 507 states have call successors, (507), 266 states have call predecessors, (507), 265 states have return successors, (504), 453 states have call predecessors, (504), 504 states have call successors, (504) [2022-04-06 16:26:49,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2226 states to 2226 states and 2609 transitions. [2022-04-06 16:26:49,598 INFO L78 Accepts]: Start accepts. Automaton has 2226 states and 2609 transitions. Word has length 403 [2022-04-06 16:26:49,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:26:49,599 INFO L478 AbstractCegarLoop]: Abstraction has 2226 states and 2609 transitions. [2022-04-06 16:26:49,599 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.333333333333333) internal successors, (152), 23 states have internal predecessors, (152), 23 states have call successors, (65), 23 states have call predecessors, (65), 21 states have return successors, (63), 21 states have call predecessors, (63), 22 states have call successors, (63) [2022-04-06 16:26:49,599 INFO L276 IsEmpty]: Start isEmpty. Operand 2226 states and 2609 transitions. [2022-04-06 16:26:49,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2022-04-06 16:26:49,603 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:26:49,603 INFO L499 BasicCegarLoop]: trace histogram [64, 63, 63, 22, 21, 21, 21, 21, 21, 21, 21, 21, 21, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:26:49,620 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-04-06 16:26:49,819 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-04-06 16:26:49,819 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:26:49,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:26:49,820 INFO L85 PathProgramCache]: Analyzing trace with hash -774012334, now seen corresponding path program 41 times [2022-04-06 16:26:49,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:49,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1787924210] [2022-04-06 16:26:49,820 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:26:49,820 INFO L85 PathProgramCache]: Analyzing trace with hash -774012334, now seen corresponding path program 42 times [2022-04-06 16:26:49,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:26:49,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272093825] [2022-04-06 16:26:49,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:26:49,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:26:49,828 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:26:49,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [31038686] [2022-04-06 16:26:49,828 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:26:49,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:26:49,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:26:49,829 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:26:49,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-04-06 16:26:51,952 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 42 check-sat command(s) [2022-04-06 16:26:51,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:26:51,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 939 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 16:26:51,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:26:52,603 INFO L134 CoverageAnalysis]: Checked inductivity of 9454 backedges. 126 proven. 9072 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2022-04-06 16:26:52,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:26:53,183 INFO L134 CoverageAnalysis]: Checked inductivity of 9454 backedges. 126 proven. 1512 refuted. 0 times theorem prover too weak. 7816 trivial. 0 not checked. [2022-04-06 16:26:53,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:26:53,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272093825] [2022-04-06 16:26:53,184 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:26:53,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31038686] [2022-04-06 16:26:53,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31038686] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:26:53,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:26:53,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2022-04-06 16:26:53,184 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:26:53,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1787924210] [2022-04-06 16:26:53,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1787924210] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:26:53,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:26:53,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 16:26:53,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197646759] [2022-04-06 16:26:53,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:26:53,185 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 16:26:53,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:53,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 16:26:53,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=1216, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 16:26:53,186 INFO L87 Difference]: Start difference. First operand 2226 states and 2609 transitions. Second operand has 25 states, 25 states have (on average 6.36) internal successors, (159), 24 states have internal predecessors, (159), 24 states have call successors, (68), 24 states have call predecessors, (68), 22 states have return successors, (66), 22 states have call predecessors, (66), 23 states have call successors, (66) [2022-04-06 16:26:54,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:26:54,213 INFO L93 Difference]: Finished difference Result 2350 states and 2765 transitions. [2022-04-06 16:26:54,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-04-06 16:26:54,214 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 6.36) internal successors, (159), 24 states have internal predecessors, (159), 24 states have call successors, (68), 24 states have call predecessors, (68), 22 states have return successors, (66), 22 states have call predecessors, (66), 23 states have call successors, (66) Word has length 422 [2022-04-06 16:26:54,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:26:54,220 INFO L225 Difference]: With dead ends: 2350 [2022-04-06 16:26:54,220 INFO L226 Difference]: Without dead ends: 2341 [2022-04-06 16:26:54,220 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 864 GetRequests, 797 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=2027, Invalid=2665, Unknown=0, NotChecked=0, Total=4692 [2022-04-06 16:26:54,221 INFO L913 BasicCegarLoop]: 95 mSDtfsCounter, 60 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 16:26:54,221 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 374 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 16:26:54,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2341 states. [2022-04-06 16:26:54,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2341 to 2339. [2022-04-06 16:26:54,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2339 states, 1526 states have (on average 1.0996068152031455) internal successors, (1678), 1582 states have internal predecessors, (1678), 534 states have call successors, (534), 279 states have call predecessors, (534), 278 states have return successors, (531), 477 states have call predecessors, (531), 531 states have call successors, (531) [2022-04-06 16:26:54,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2339 states to 2339 states and 2743 transitions. [2022-04-06 16:26:54,931 INFO L78 Accepts]: Start accepts. Automaton has 2339 states and 2743 transitions. Word has length 422 [2022-04-06 16:26:54,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:26:54,931 INFO L478 AbstractCegarLoop]: Abstraction has 2339 states and 2743 transitions. [2022-04-06 16:26:54,932 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.36) internal successors, (159), 24 states have internal predecessors, (159), 24 states have call successors, (68), 24 states have call predecessors, (68), 22 states have return successors, (66), 22 states have call predecessors, (66), 23 states have call successors, (66) [2022-04-06 16:26:54,932 INFO L276 IsEmpty]: Start isEmpty. Operand 2339 states and 2743 transitions. [2022-04-06 16:26:54,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2022-04-06 16:26:54,937 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:26:54,937 INFO L499 BasicCegarLoop]: trace histogram [67, 66, 66, 23, 22, 22, 22, 22, 22, 22, 22, 22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:26:54,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-04-06 16:26:55,143 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:26:55,143 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:26:55,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:26:55,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1767137023, now seen corresponding path program 43 times [2022-04-06 16:26:55,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:55,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [190813615] [2022-04-06 16:26:55,144 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:26:55,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1767137023, now seen corresponding path program 44 times [2022-04-06 16:26:55,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:26:55,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667546518] [2022-04-06 16:26:55,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:26:55,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:26:55,154 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:26:55,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2113179678] [2022-04-06 16:26:55,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:26:55,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:26:55,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:26:55,155 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:26:55,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-04-06 16:26:55,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:26:55,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:26:55,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-06 16:26:55,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:26:55,924 INFO L134 CoverageAnalysis]: Checked inductivity of 10377 backedges. 132 proven. 9977 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-04-06 16:26:55,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:26:56,500 INFO L134 CoverageAnalysis]: Checked inductivity of 10377 backedges. 132 proven. 1661 refuted. 0 times theorem prover too weak. 8584 trivial. 0 not checked. [2022-04-06 16:26:56,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:26:56,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667546518] [2022-04-06 16:26:56,500 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:26:56,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113179678] [2022-04-06 16:26:56,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113179678] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:26:56,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:26:56,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-04-06 16:26:56,501 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:26:56,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [190813615] [2022-04-06 16:26:56,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [190813615] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:26:56,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:26:56,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 16:26:56,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602745105] [2022-04-06 16:26:56,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:26:56,501 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 16:26:56,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:56,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 16:26:56,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 16:26:56,502 INFO L87 Difference]: Start difference. First operand 2339 states and 2743 transitions. Second operand has 26 states, 26 states have (on average 6.384615384615385) internal successors, (166), 25 states have internal predecessors, (166), 25 states have call successors, (71), 25 states have call predecessors, (71), 23 states have return successors, (69), 23 states have call predecessors, (69), 24 states have call successors, (69) [2022-04-06 16:26:57,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:26:57,718 INFO L93 Difference]: Finished difference Result 2463 states and 2899 transitions. [2022-04-06 16:26:57,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-04-06 16:26:57,718 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 6.384615384615385) internal successors, (166), 25 states have internal predecessors, (166), 25 states have call successors, (71), 25 states have call predecessors, (71), 23 states have return successors, (69), 23 states have call predecessors, (69), 24 states have call successors, (69) Word has length 441 [2022-04-06 16:26:57,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:26:57,730 INFO L225 Difference]: With dead ends: 2463 [2022-04-06 16:26:57,730 INFO L226 Difference]: Without dead ends: 2454 [2022-04-06 16:26:57,731 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 903 GetRequests, 833 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=2211, Invalid=2901, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 16:26:57,731 INFO L913 BasicCegarLoop]: 98 mSDtfsCounter, 64 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 16:26:57,731 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 376 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 16:26:57,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2454 states. [2022-04-06 16:26:58,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2454 to 2452. [2022-04-06 16:26:58,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2452 states, 1599 states have (on average 1.099437148217636) internal successors, (1758), 1658 states have internal predecessors, (1758), 561 states have call successors, (561), 292 states have call predecessors, (561), 291 states have return successors, (558), 501 states have call predecessors, (558), 558 states have call successors, (558) [2022-04-06 16:26:58,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2452 states to 2452 states and 2877 transitions. [2022-04-06 16:26:58,497 INFO L78 Accepts]: Start accepts. Automaton has 2452 states and 2877 transitions. Word has length 441 [2022-04-06 16:26:58,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:26:58,497 INFO L478 AbstractCegarLoop]: Abstraction has 2452 states and 2877 transitions. [2022-04-06 16:26:58,497 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.384615384615385) internal successors, (166), 25 states have internal predecessors, (166), 25 states have call successors, (71), 25 states have call predecessors, (71), 23 states have return successors, (69), 23 states have call predecessors, (69), 24 states have call successors, (69) [2022-04-06 16:26:58,497 INFO L276 IsEmpty]: Start isEmpty. Operand 2452 states and 2877 transitions. [2022-04-06 16:26:58,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2022-04-06 16:26:58,502 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:26:58,503 INFO L499 BasicCegarLoop]: trace histogram [70, 69, 69, 24, 23, 23, 23, 23, 23, 23, 23, 23, 23, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:26:58,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-04-06 16:26:58,713 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-04-06 16:26:58,713 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:26:58,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:26:58,713 INFO L85 PathProgramCache]: Analyzing trace with hash 568217074, now seen corresponding path program 45 times [2022-04-06 16:26:58,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:58,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1922128175] [2022-04-06 16:26:58,714 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:26:58,714 INFO L85 PathProgramCache]: Analyzing trace with hash 568217074, now seen corresponding path program 46 times [2022-04-06 16:26:58,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:26:58,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718499039] [2022-04-06 16:26:58,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:26:58,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:26:58,739 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:26:58,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [188380041] [2022-04-06 16:26:58,740 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:26:58,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:26:58,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:26:58,741 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:26:58,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-04-06 16:26:58,865 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:26:58,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:26:58,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 1019 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-06 16:26:58,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:26:59,359 INFO L134 CoverageAnalysis]: Checked inductivity of 11343 backedges. 138 proven. 10925 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2022-04-06 16:26:59,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:26:59,985 INFO L134 CoverageAnalysis]: Checked inductivity of 11343 backedges. 138 proven. 1817 refuted. 0 times theorem prover too weak. 9388 trivial. 0 not checked. [2022-04-06 16:26:59,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:26:59,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718499039] [2022-04-06 16:26:59,985 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:26:59,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188380041] [2022-04-06 16:26:59,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188380041] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:26:59,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:26:59,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2022-04-06 16:26:59,986 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:26:59,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1922128175] [2022-04-06 16:26:59,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1922128175] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:26:59,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:26:59,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 16:26:59,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900405257] [2022-04-06 16:26:59,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:26:59,999 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 16:26:59,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:27:00,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 16:27:00,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1230, Invalid=1422, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 16:27:00,003 INFO L87 Difference]: Start difference. First operand 2452 states and 2877 transitions. Second operand has 27 states, 27 states have (on average 6.407407407407407) internal successors, (173), 26 states have internal predecessors, (173), 26 states have call successors, (74), 26 states have call predecessors, (74), 24 states have return successors, (72), 24 states have call predecessors, (72), 25 states have call successors, (72) [2022-04-06 16:27:01,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:27:01,285 INFO L93 Difference]: Finished difference Result 2576 states and 3033 transitions. [2022-04-06 16:27:01,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-04-06 16:27:01,286 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 6.407407407407407) internal successors, (173), 26 states have internal predecessors, (173), 26 states have call successors, (74), 26 states have call predecessors, (74), 24 states have return successors, (72), 24 states have call predecessors, (72), 25 states have call successors, (72) Word has length 460 [2022-04-06 16:27:01,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:27:01,291 INFO L225 Difference]: With dead ends: 2576 [2022-04-06 16:27:01,291 INFO L226 Difference]: Without dead ends: 2567 [2022-04-06 16:27:01,292 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 942 GetRequests, 869 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=2403, Invalid=3147, Unknown=0, NotChecked=0, Total=5550 [2022-04-06 16:27:01,292 INFO L913 BasicCegarLoop]: 101 mSDtfsCounter, 100 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 16:27:01,293 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 378 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 16:27:01,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2567 states. [2022-04-06 16:27:02,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2567 to 2565. [2022-04-06 16:27:02,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2565 states, 1672 states have (on average 1.0992822966507176) internal successors, (1838), 1734 states have internal predecessors, (1838), 588 states have call successors, (588), 305 states have call predecessors, (588), 304 states have return successors, (585), 525 states have call predecessors, (585), 585 states have call successors, (585) [2022-04-06 16:27:02,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2565 states to 2565 states and 3011 transitions. [2022-04-06 16:27:02,092 INFO L78 Accepts]: Start accepts. Automaton has 2565 states and 3011 transitions. Word has length 460 [2022-04-06 16:27:02,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:27:02,093 INFO L478 AbstractCegarLoop]: Abstraction has 2565 states and 3011 transitions. [2022-04-06 16:27:02,093 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.407407407407407) internal successors, (173), 26 states have internal predecessors, (173), 26 states have call successors, (74), 26 states have call predecessors, (74), 24 states have return successors, (72), 24 states have call predecessors, (72), 25 states have call successors, (72) [2022-04-06 16:27:02,093 INFO L276 IsEmpty]: Start isEmpty. Operand 2565 states and 3011 transitions. [2022-04-06 16:27:02,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2022-04-06 16:27:02,099 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:27:02,099 INFO L499 BasicCegarLoop]: trace histogram [73, 72, 72, 25, 24, 24, 24, 24, 24, 24, 24, 24, 24, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:27:02,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-04-06 16:27:02,317 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-04-06 16:27:02,317 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:27:02,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:27:02,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1624174945, now seen corresponding path program 47 times [2022-04-06 16:27:02,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:27:02,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [560517410] [2022-04-06 16:27:02,318 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:27:02,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1624174945, now seen corresponding path program 48 times [2022-04-06 16:27:02,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:27:02,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548884965] [2022-04-06 16:27:02,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:27:02,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:27:02,326 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:27:02,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2004753872] [2022-04-06 16:27:02,327 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:27:02,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:27:02,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:27:02,328 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:27:02,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-04-06 16:27:02,695 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 45 check-sat command(s) [2022-04-06 16:27:02,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:27:02,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 1032 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 16:27:02,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:27:03,321 INFO L134 CoverageAnalysis]: Checked inductivity of 12352 backedges. 144 proven. 11916 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2022-04-06 16:27:03,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:27:04,402 INFO L134 CoverageAnalysis]: Checked inductivity of 12352 backedges. 144 proven. 1980 refuted. 0 times theorem prover too weak. 10228 trivial. 0 not checked. [2022-04-06 16:27:04,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:27:04,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548884965] [2022-04-06 16:27:04,402 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:27:04,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004753872] [2022-04-06 16:27:04,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004753872] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:27:04,403 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:27:04,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2022-04-06 16:27:04,403 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:27:04,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [560517410] [2022-04-06 16:27:04,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [560517410] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:27:04,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:27:04,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 16:27:04,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91623977] [2022-04-06 16:27:04,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:27:04,404 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 16:27:04,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:27:04,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 16:27:04,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 16:27:04,405 INFO L87 Difference]: Start difference. First operand 2565 states and 3011 transitions. Second operand has 28 states, 28 states have (on average 6.428571428571429) internal successors, (180), 27 states have internal predecessors, (180), 27 states have call successors, (77), 27 states have call predecessors, (77), 25 states have return successors, (75), 25 states have call predecessors, (75), 26 states have call successors, (75) [2022-04-06 16:27:05,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:27:05,714 INFO L93 Difference]: Finished difference Result 2689 states and 3167 transitions. [2022-04-06 16:27:05,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-04-06 16:27:05,714 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 6.428571428571429) internal successors, (180), 27 states have internal predecessors, (180), 27 states have call successors, (77), 27 states have call predecessors, (77), 25 states have return successors, (75), 25 states have call predecessors, (75), 26 states have call successors, (75) Word has length 479 [2022-04-06 16:27:05,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:27:05,720 INFO L225 Difference]: With dead ends: 2689 [2022-04-06 16:27:05,720 INFO L226 Difference]: Without dead ends: 2680 [2022-04-06 16:27:05,720 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 981 GetRequests, 905 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2603, Invalid=3403, Unknown=0, NotChecked=0, Total=6006 [2022-04-06 16:27:05,721 INFO L913 BasicCegarLoop]: 104 mSDtfsCounter, 77 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 16:27:05,721 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 410 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 16:27:05,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2022-04-06 16:27:06,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 2678. [2022-04-06 16:27:06,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2678 states, 1745 states have (on average 1.0991404011461319) internal successors, (1918), 1810 states have internal predecessors, (1918), 615 states have call successors, (615), 318 states have call predecessors, (615), 317 states have return successors, (612), 549 states have call predecessors, (612), 612 states have call successors, (612) [2022-04-06 16:27:06,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2678 states to 2678 states and 3145 transitions. [2022-04-06 16:27:06,557 INFO L78 Accepts]: Start accepts. Automaton has 2678 states and 3145 transitions. Word has length 479 [2022-04-06 16:27:06,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:27:06,558 INFO L478 AbstractCegarLoop]: Abstraction has 2678 states and 3145 transitions. [2022-04-06 16:27:06,558 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.428571428571429) internal successors, (180), 27 states have internal predecessors, (180), 27 states have call successors, (77), 27 states have call predecessors, (77), 25 states have return successors, (75), 25 states have call predecessors, (75), 26 states have call successors, (75) [2022-04-06 16:27:06,558 INFO L276 IsEmpty]: Start isEmpty. Operand 2678 states and 3145 transitions. [2022-04-06 16:27:06,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2022-04-06 16:27:06,563 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:27:06,563 INFO L499 BasicCegarLoop]: trace histogram [76, 75, 75, 26, 25, 25, 25, 25, 25, 25, 25, 25, 25, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:27:06,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-04-06 16:27:06,781 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:27:06,782 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:27:06,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:27:06,782 INFO L85 PathProgramCache]: Analyzing trace with hash -695639662, now seen corresponding path program 49 times [2022-04-06 16:27:06,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:27:06,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1067727560] [2022-04-06 16:27:06,782 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:27:06,782 INFO L85 PathProgramCache]: Analyzing trace with hash -695639662, now seen corresponding path program 50 times [2022-04-06 16:27:06,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:27:06,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973002322] [2022-04-06 16:27:06,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:27:06,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:27:06,791 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:27:06,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1598634961] [2022-04-06 16:27:06,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:27:06,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:27:06,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:27:06,792 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:27:06,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-04-06 16:27:06,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:27:06,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:27:06,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 1099 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 16:27:06,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:27:07,809 INFO L134 CoverageAnalysis]: Checked inductivity of 13404 backedges. 150 proven. 12950 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2022-04-06 16:27:07,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:27:08,481 INFO L134 CoverageAnalysis]: Checked inductivity of 13404 backedges. 150 proven. 2150 refuted. 0 times theorem prover too weak. 11104 trivial. 0 not checked. [2022-04-06 16:27:08,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:27:08,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973002322] [2022-04-06 16:27:08,481 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:27:08,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598634961] [2022-04-06 16:27:08,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598634961] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:27:08,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:27:08,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 54 [2022-04-06 16:27:08,482 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:27:08,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1067727560] [2022-04-06 16:27:08,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1067727560] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:27:08,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:27:08,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 16:27:08,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544011014] [2022-04-06 16:27:08,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:27:08,483 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 16:27:08,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:27:08,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 16:27:08,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 16:27:08,484 INFO L87 Difference]: Start difference. First operand 2678 states and 3145 transitions. Second operand has 29 states, 29 states have (on average 6.448275862068965) internal successors, (187), 28 states have internal predecessors, (187), 28 states have call successors, (80), 28 states have call predecessors, (80), 26 states have return successors, (78), 26 states have call predecessors, (78), 27 states have call successors, (78) [2022-04-06 16:27:09,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:27:09,818 INFO L93 Difference]: Finished difference Result 2802 states and 3301 transitions. [2022-04-06 16:27:09,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-04-06 16:27:09,818 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 6.448275862068965) internal successors, (187), 28 states have internal predecessors, (187), 28 states have call successors, (80), 28 states have call predecessors, (80), 26 states have return successors, (78), 26 states have call predecessors, (78), 27 states have call successors, (78) Word has length 498 [2022-04-06 16:27:09,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:27:09,825 INFO L225 Difference]: With dead ends: 2802 [2022-04-06 16:27:09,825 INFO L226 Difference]: Without dead ends: 2793 [2022-04-06 16:27:09,833 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1020 GetRequests, 942 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2656, Invalid=3506, Unknown=0, NotChecked=0, Total=6162 [2022-04-06 16:27:09,833 INFO L913 BasicCegarLoop]: 107 mSDtfsCounter, 78 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 16:27:09,833 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 412 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 16:27:09,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2793 states. [2022-04-06 16:27:10,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2793 to 2791. [2022-04-06 16:27:10,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2791 states, 1818 states have (on average 1.099009900990099) internal successors, (1998), 1886 states have internal predecessors, (1998), 642 states have call successors, (642), 331 states have call predecessors, (642), 330 states have return successors, (639), 573 states have call predecessors, (639), 639 states have call successors, (639) [2022-04-06 16:27:10,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2791 states to 2791 states and 3279 transitions. [2022-04-06 16:27:10,716 INFO L78 Accepts]: Start accepts. Automaton has 2791 states and 3279 transitions. Word has length 498 [2022-04-06 16:27:10,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:27:10,717 INFO L478 AbstractCegarLoop]: Abstraction has 2791 states and 3279 transitions. [2022-04-06 16:27:10,717 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 6.448275862068965) internal successors, (187), 28 states have internal predecessors, (187), 28 states have call successors, (80), 28 states have call predecessors, (80), 26 states have return successors, (78), 26 states have call predecessors, (78), 27 states have call successors, (78) [2022-04-06 16:27:10,717 INFO L276 IsEmpty]: Start isEmpty. Operand 2791 states and 3279 transitions. [2022-04-06 16:27:10,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 518 [2022-04-06 16:27:10,723 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:27:10,723 INFO L499 BasicCegarLoop]: trace histogram [79, 78, 78, 27, 26, 26, 26, 26, 26, 26, 26, 26, 26, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:27:10,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-04-06 16:27:10,938 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:27:10,939 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:27:10,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:27:10,947 INFO L85 PathProgramCache]: Analyzing trace with hash 642972097, now seen corresponding path program 51 times [2022-04-06 16:27:10,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:27:10,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1914517189] [2022-04-06 16:27:10,947 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:27:10,947 INFO L85 PathProgramCache]: Analyzing trace with hash 642972097, now seen corresponding path program 52 times [2022-04-06 16:27:10,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:27:10,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753283131] [2022-04-06 16:27:10,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:27:10,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:27:10,956 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:27:10,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1309007677] [2022-04-06 16:27:10,957 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:27:10,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:27:10,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:27:10,958 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:27:10,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-04-06 16:27:11,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:27:11,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:27:11,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 1139 conjuncts, 57 conjunts are in the unsatisfiable core [2022-04-06 16:27:11,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:27:11,644 INFO L134 CoverageAnalysis]: Checked inductivity of 14499 backedges. 156 proven. 14027 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-04-06 16:27:11,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:27:12,382 INFO L134 CoverageAnalysis]: Checked inductivity of 14499 backedges. 156 proven. 2327 refuted. 0 times theorem prover too weak. 12016 trivial. 0 not checked. [2022-04-06 16:27:12,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:27:12,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753283131] [2022-04-06 16:27:12,382 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:27:12,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309007677] [2022-04-06 16:27:12,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309007677] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:27:12,382 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:27:12,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 54 [2022-04-06 16:27:12,383 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:27:12,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1914517189] [2022-04-06 16:27:12,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1914517189] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:27:12,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:27:12,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-04-06 16:27:12,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326307566] [2022-04-06 16:27:12,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:27:12,383 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 16:27:12,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:27:12,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 16:27:12,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 16:27:12,384 INFO L87 Difference]: Start difference. First operand 2791 states and 3279 transitions. Second operand has 30 states, 30 states have (on average 6.466666666666667) internal successors, (194), 29 states have internal predecessors, (194), 29 states have call successors, (83), 29 states have call predecessors, (83), 27 states have return successors, (81), 27 states have call predecessors, (81), 28 states have call successors, (81) [2022-04-06 16:27:13,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:27:13,781 INFO L93 Difference]: Finished difference Result 2915 states and 3435 transitions. [2022-04-06 16:27:13,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-04-06 16:27:13,781 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 6.466666666666667) internal successors, (194), 29 states have internal predecessors, (194), 29 states have call successors, (83), 29 states have call predecessors, (83), 27 states have return successors, (81), 27 states have call predecessors, (81), 28 states have call successors, (81) Word has length 517 [2022-04-06 16:27:13,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:27:13,787 INFO L225 Difference]: With dead ends: 2915 [2022-04-06 16:27:13,787 INFO L226 Difference]: Without dead ends: 2906 [2022-04-06 16:27:13,787 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1059 GetRequests, 980 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2709, Invalid=3611, Unknown=0, NotChecked=0, Total=6320 [2022-04-06 16:27:13,787 INFO L913 BasicCegarLoop]: 110 mSDtfsCounter, 86 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 16:27:13,788 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 424 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 16:27:13,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2906 states. [2022-04-06 16:27:14,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2906 to 2904. [2022-04-06 16:27:14,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2904 states, 1891 states have (on average 1.0988894764674775) internal successors, (2078), 1962 states have internal predecessors, (2078), 669 states have call successors, (669), 344 states have call predecessors, (669), 343 states have return successors, (666), 597 states have call predecessors, (666), 666 states have call successors, (666) [2022-04-06 16:27:14,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2904 states to 2904 states and 3413 transitions. [2022-04-06 16:27:14,677 INFO L78 Accepts]: Start accepts. Automaton has 2904 states and 3413 transitions. Word has length 517 [2022-04-06 16:27:14,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:27:14,677 INFO L478 AbstractCegarLoop]: Abstraction has 2904 states and 3413 transitions. [2022-04-06 16:27:14,677 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.466666666666667) internal successors, (194), 29 states have internal predecessors, (194), 29 states have call successors, (83), 29 states have call predecessors, (83), 27 states have return successors, (81), 27 states have call predecessors, (81), 28 states have call successors, (81) [2022-04-06 16:27:14,677 INFO L276 IsEmpty]: Start isEmpty. Operand 2904 states and 3413 transitions. [2022-04-06 16:27:14,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 537 [2022-04-06 16:27:14,683 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:27:14,683 INFO L499 BasicCegarLoop]: trace histogram [82, 81, 81, 28, 27, 27, 27, 27, 27, 27, 27, 27, 27, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:27:14,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-04-06 16:27:14,898 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:27:14,898 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:27:14,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:27:14,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1709751602, now seen corresponding path program 53 times [2022-04-06 16:27:14,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:27:14,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1772579457] [2022-04-06 16:27:14,899 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:27:14,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1709751602, now seen corresponding path program 54 times [2022-04-06 16:27:14,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:27:14,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718113654] [2022-04-06 16:27:14,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:27:14,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:27:14,908 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:27:14,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1773126123] [2022-04-06 16:27:14,908 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:27:14,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:27:14,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:27:14,909 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:27:14,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-04-06 16:27:15,300 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2022-04-06 16:27:15,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:27:15,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 1152 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-06 16:27:15,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:27:15,991 INFO L134 CoverageAnalysis]: Checked inductivity of 15637 backedges. 162 proven. 15147 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2022-04-06 16:27:15,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:27:16,766 INFO L134 CoverageAnalysis]: Checked inductivity of 15637 backedges. 162 proven. 2511 refuted. 0 times theorem prover too weak. 12964 trivial. 0 not checked. [2022-04-06 16:27:16,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:27:16,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718113654] [2022-04-06 16:27:16,766 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:27:16,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773126123] [2022-04-06 16:27:16,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773126123] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:27:16,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:27:16,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 54 [2022-04-06 16:27:16,767 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:27:16,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1772579457] [2022-04-06 16:27:16,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1772579457] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:27:16,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:27:16,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 16:27:16,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594095674] [2022-04-06 16:27:16,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:27:16,768 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 16:27:16,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:27:16,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 16:27:16,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 16:27:16,768 INFO L87 Difference]: Start difference. First operand 2904 states and 3413 transitions. Second operand has 31 states, 31 states have (on average 6.483870967741935) internal successors, (201), 30 states have internal predecessors, (201), 30 states have call successors, (86), 30 states have call predecessors, (86), 28 states have return successors, (84), 28 states have call predecessors, (84), 29 states have call successors, (84) [2022-04-06 16:27:18,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:27:18,196 INFO L93 Difference]: Finished difference Result 3028 states and 3569 transitions. [2022-04-06 16:27:18,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-04-06 16:27:18,197 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 6.483870967741935) internal successors, (201), 30 states have internal predecessors, (201), 30 states have call successors, (86), 30 states have call predecessors, (86), 28 states have return successors, (84), 28 states have call predecessors, (84), 29 states have call successors, (84) Word has length 536 [2022-04-06 16:27:18,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:27:18,203 INFO L225 Difference]: With dead ends: 3028 [2022-04-06 16:27:18,203 INFO L226 Difference]: Without dead ends: 3019 [2022-04-06 16:27:18,203 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1098 GetRequests, 1018 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2762, Invalid=3718, Unknown=0, NotChecked=0, Total=6480 [2022-04-06 16:27:18,204 INFO L913 BasicCegarLoop]: 113 mSDtfsCounter, 100 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 16:27:18,204 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 426 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 16:27:18,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3019 states. [2022-04-06 16:27:19,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3019 to 3017. [2022-04-06 16:27:19,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3017 states, 1964 states have (on average 1.0987780040733197) internal successors, (2158), 2038 states have internal predecessors, (2158), 696 states have call successors, (696), 357 states have call predecessors, (696), 356 states have return successors, (693), 621 states have call predecessors, (693), 693 states have call successors, (693) [2022-04-06 16:27:19,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 3547 transitions. [2022-04-06 16:27:19,159 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 3547 transitions. Word has length 536 [2022-04-06 16:27:19,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:27:19,159 INFO L478 AbstractCegarLoop]: Abstraction has 3017 states and 3547 transitions. [2022-04-06 16:27:19,160 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 6.483870967741935) internal successors, (201), 30 states have internal predecessors, (201), 30 states have call successors, (86), 30 states have call predecessors, (86), 28 states have return successors, (84), 28 states have call predecessors, (84), 29 states have call successors, (84) [2022-04-06 16:27:19,160 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 3547 transitions. [2022-04-06 16:27:19,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 556 [2022-04-06 16:27:19,167 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:27:19,167 INFO L499 BasicCegarLoop]: trace histogram [85, 84, 84, 29, 28, 28, 28, 28, 28, 28, 28, 28, 28, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:27:19,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-04-06 16:27:19,374 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-04-06 16:27:19,374 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:27:19,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:27:19,374 INFO L85 PathProgramCache]: Analyzing trace with hash 284015137, now seen corresponding path program 55 times [2022-04-06 16:27:19,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:27:19,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [960010581] [2022-04-06 16:27:19,375 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:27:19,375 INFO L85 PathProgramCache]: Analyzing trace with hash 284015137, now seen corresponding path program 56 times [2022-04-06 16:27:19,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:27:19,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333586582] [2022-04-06 16:27:19,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:27:19,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:27:19,387 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:27:19,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [912379406] [2022-04-06 16:27:19,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:27:19,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:27:19,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:27:19,389 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:27:19,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-04-06 16:27:19,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:27:19,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:27:19,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 1219 conjuncts, 61 conjunts are in the unsatisfiable core [2022-04-06 16:27:19,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:27:20,456 INFO L134 CoverageAnalysis]: Checked inductivity of 16818 backedges. 168 proven. 16310 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2022-04-06 16:27:20,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:27:21,343 INFO L134 CoverageAnalysis]: Checked inductivity of 16818 backedges. 168 proven. 2702 refuted. 0 times theorem prover too weak. 13948 trivial. 0 not checked. [2022-04-06 16:27:21,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:27:21,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333586582] [2022-04-06 16:27:21,343 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:27:21,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912379406] [2022-04-06 16:27:21,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912379406] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:27:21,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:27:21,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 54 [2022-04-06 16:27:21,345 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:27:21,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [960010581] [2022-04-06 16:27:21,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [960010581] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:27:21,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:27:21,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-04-06 16:27:21,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342987539] [2022-04-06 16:27:21,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:27:21,346 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 16:27:21,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:27:21,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 16:27:21,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 16:27:21,347 INFO L87 Difference]: Start difference. First operand 3017 states and 3547 transitions. Second operand has 32 states, 32 states have (on average 6.5) internal successors, (208), 31 states have internal predecessors, (208), 31 states have call successors, (89), 31 states have call predecessors, (89), 29 states have return successors, (87), 29 states have call predecessors, (87), 30 states have call successors, (87) [2022-04-06 16:27:23,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:27:23,064 INFO L93 Difference]: Finished difference Result 3141 states and 3703 transitions. [2022-04-06 16:27:23,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-04-06 16:27:23,065 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 6.5) internal successors, (208), 31 states have internal predecessors, (208), 31 states have call successors, (89), 31 states have call predecessors, (89), 29 states have return successors, (87), 29 states have call predecessors, (87), 30 states have call successors, (87) Word has length 555 [2022-04-06 16:27:23,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:27:23,070 INFO L225 Difference]: With dead ends: 3141 [2022-04-06 16:27:23,070 INFO L226 Difference]: Without dead ends: 3132 [2022-04-06 16:27:23,071 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1137 GetRequests, 1056 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2815, Invalid=3827, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 16:27:23,071 INFO L913 BasicCegarLoop]: 116 mSDtfsCounter, 106 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 16:27:23,071 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 448 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 16:27:23,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3132 states. [2022-04-06 16:27:24,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3132 to 3130. [2022-04-06 16:27:24,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3130 states, 2037 states have (on average 1.0986745213549338) internal successors, (2238), 2114 states have internal predecessors, (2238), 723 states have call successors, (723), 370 states have call predecessors, (723), 369 states have return successors, (720), 645 states have call predecessors, (720), 720 states have call successors, (720) [2022-04-06 16:27:24,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3130 states to 3130 states and 3681 transitions. [2022-04-06 16:27:24,081 INFO L78 Accepts]: Start accepts. Automaton has 3130 states and 3681 transitions. Word has length 555 [2022-04-06 16:27:24,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:27:24,087 INFO L478 AbstractCegarLoop]: Abstraction has 3130 states and 3681 transitions. [2022-04-06 16:27:24,087 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 6.5) internal successors, (208), 31 states have internal predecessors, (208), 31 states have call successors, (89), 31 states have call predecessors, (89), 29 states have return successors, (87), 29 states have call predecessors, (87), 30 states have call successors, (87) [2022-04-06 16:27:24,087 INFO L276 IsEmpty]: Start isEmpty. Operand 3130 states and 3681 transitions. [2022-04-06 16:27:24,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 575 [2022-04-06 16:27:24,095 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:27:24,095 INFO L499 BasicCegarLoop]: trace histogram [88, 87, 87, 30, 29, 29, 29, 29, 29, 29, 29, 29, 29, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:27:24,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-04-06 16:27:24,301 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-04-06 16:27:24,301 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:27:24,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:27:24,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1854300370, now seen corresponding path program 57 times [2022-04-06 16:27:24,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:27:24,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1589070246] [2022-04-06 16:27:24,302 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:27:24,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1854300370, now seen corresponding path program 58 times [2022-04-06 16:27:24,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:27:24,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565824774] [2022-04-06 16:27:24,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:27:24,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:27:24,312 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:27:24,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [456314648] [2022-04-06 16:27:24,312 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:27:24,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:27:24,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:27:24,313 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:27:24,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-04-06 16:27:24,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:27:24,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:27:24,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 1259 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-06 16:27:24,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:27:25,195 INFO L134 CoverageAnalysis]: Checked inductivity of 18042 backedges. 174 proven. 17516 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2022-04-06 16:27:25,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:27:25,913 INFO L134 CoverageAnalysis]: Checked inductivity of 18042 backedges. 174 proven. 2900 refuted. 0 times theorem prover too weak. 14968 trivial. 0 not checked. [2022-04-06 16:27:25,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:27:25,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565824774] [2022-04-06 16:27:25,914 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:27:25,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456314648] [2022-04-06 16:27:25,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456314648] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:27:25,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:27:25,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 54 [2022-04-06 16:27:25,914 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:27:25,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1589070246] [2022-04-06 16:27:25,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1589070246] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:27:25,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:27:25,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 16:27:25,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550987509] [2022-04-06 16:27:25,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:27:25,915 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 16:27:25,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:27:25,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 16:27:25,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 16:27:25,916 INFO L87 Difference]: Start difference. First operand 3130 states and 3681 transitions. Second operand has 33 states, 33 states have (on average 6.515151515151516) internal successors, (215), 32 states have internal predecessors, (215), 32 states have call successors, (92), 32 states have call predecessors, (92), 30 states have return successors, (90), 30 states have call predecessors, (90), 31 states have call successors, (90) [2022-04-06 16:27:27,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:27:27,471 INFO L93 Difference]: Finished difference Result 3254 states and 3837 transitions. [2022-04-06 16:27:27,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-04-06 16:27:27,472 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 6.515151515151516) internal successors, (215), 32 states have internal predecessors, (215), 32 states have call successors, (92), 32 states have call predecessors, (92), 30 states have return successors, (90), 30 states have call predecessors, (90), 31 states have call successors, (90) Word has length 574 [2022-04-06 16:27:27,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:27:27,478 INFO L225 Difference]: With dead ends: 3254 [2022-04-06 16:27:27,478 INFO L226 Difference]: Without dead ends: 3245 [2022-04-06 16:27:27,479 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1176 GetRequests, 1094 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2868, Invalid=3938, Unknown=0, NotChecked=0, Total=6806 [2022-04-06 16:27:27,479 INFO L913 BasicCegarLoop]: 119 mSDtfsCounter, 141 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 16:27:27,479 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 440 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 16:27:27,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3245 states. [2022-04-06 16:27:28,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3245 to 3243. [2022-04-06 16:27:28,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3243 states, 2110 states have (on average 1.0985781990521326) internal successors, (2318), 2190 states have internal predecessors, (2318), 750 states have call successors, (750), 383 states have call predecessors, (750), 382 states have return successors, (747), 669 states have call predecessors, (747), 747 states have call successors, (747) [2022-04-06 16:27:28,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3243 states to 3243 states and 3815 transitions. [2022-04-06 16:27:28,490 INFO L78 Accepts]: Start accepts. Automaton has 3243 states and 3815 transitions. Word has length 574 [2022-04-06 16:27:28,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:27:28,490 INFO L478 AbstractCegarLoop]: Abstraction has 3243 states and 3815 transitions. [2022-04-06 16:27:28,491 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 6.515151515151516) internal successors, (215), 32 states have internal predecessors, (215), 32 states have call successors, (92), 32 states have call predecessors, (92), 30 states have return successors, (90), 30 states have call predecessors, (90), 31 states have call successors, (90) [2022-04-06 16:27:28,491 INFO L276 IsEmpty]: Start isEmpty. Operand 3243 states and 3815 transitions. [2022-04-06 16:27:28,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 594 [2022-04-06 16:27:28,496 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:27:28,496 INFO L499 BasicCegarLoop]: trace histogram [91, 90, 90, 31, 30, 30, 30, 30, 30, 30, 30, 30, 30, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:27:28,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-04-06 16:27:28,714 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:27:28,714 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:27:28,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:27:28,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1372926593, now seen corresponding path program 59 times [2022-04-06 16:27:28,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:27:28,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [184488665] [2022-04-06 16:27:28,715 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:27:28,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1372926593, now seen corresponding path program 60 times [2022-04-06 16:27:28,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:27:28,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070484003] [2022-04-06 16:27:28,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:27:28,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:27:28,725 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:27:28,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1089074068] [2022-04-06 16:27:28,726 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:27:28,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:27:28,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:27:28,726 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:27:28,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-04-06 16:28:43,339 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 57 check-sat command(s) [2022-04-06 16:28:43,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:28:43,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 1272 conjuncts, 65 conjunts are in the unsatisfiable core [2022-04-06 16:28:43,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:28:44,410 INFO L134 CoverageAnalysis]: Checked inductivity of 19309 backedges. 180 proven. 18765 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-06 16:28:44,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:28:45,205 INFO L134 CoverageAnalysis]: Checked inductivity of 19309 backedges. 180 proven. 3105 refuted. 0 times theorem prover too weak. 16024 trivial. 0 not checked. [2022-04-06 16:28:45,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:28:45,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070484003] [2022-04-06 16:28:45,205 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:28:45,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089074068] [2022-04-06 16:28:45,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089074068] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:28:45,205 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:28:45,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 54 [2022-04-06 16:28:45,206 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:28:45,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [184488665] [2022-04-06 16:28:45,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [184488665] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:28:45,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:28:45,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-04-06 16:28:45,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690427037] [2022-04-06 16:28:45,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:28:45,206 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 16:28:45,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:28:45,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 16:28:45,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 16:28:45,207 INFO L87 Difference]: Start difference. First operand 3243 states and 3815 transitions. Second operand has 34 states, 34 states have (on average 6.529411764705882) internal successors, (222), 33 states have internal predecessors, (222), 33 states have call successors, (95), 33 states have call predecessors, (95), 31 states have return successors, (93), 31 states have call predecessors, (93), 32 states have call successors, (93) [2022-04-06 16:28:46,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:28:46,741 INFO L93 Difference]: Finished difference Result 3367 states and 3971 transitions. [2022-04-06 16:28:46,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-04-06 16:28:46,742 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 6.529411764705882) internal successors, (222), 33 states have internal predecessors, (222), 33 states have call successors, (95), 33 states have call predecessors, (95), 31 states have return successors, (93), 31 states have call predecessors, (93), 32 states have call successors, (93) Word has length 593 [2022-04-06 16:28:46,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:28:46,748 INFO L225 Difference]: With dead ends: 3367 [2022-04-06 16:28:46,749 INFO L226 Difference]: Without dead ends: 3358 [2022-04-06 16:28:46,749 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1215 GetRequests, 1132 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2921, Invalid=4051, Unknown=0, NotChecked=0, Total=6972 [2022-04-06 16:28:46,749 INFO L913 BasicCegarLoop]: 122 mSDtfsCounter, 128 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 16:28:46,750 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 472 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 16:28:46,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3358 states. [2022-04-06 16:28:47,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3358 to 3356. [2022-04-06 16:28:47,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3356 states, 2183 states have (on average 1.0984883188273018) internal successors, (2398), 2266 states have internal predecessors, (2398), 777 states have call successors, (777), 396 states have call predecessors, (777), 395 states have return successors, (774), 693 states have call predecessors, (774), 774 states have call successors, (774) [2022-04-06 16:28:47,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3356 states to 3356 states and 3949 transitions. [2022-04-06 16:28:47,795 INFO L78 Accepts]: Start accepts. Automaton has 3356 states and 3949 transitions. Word has length 593 [2022-04-06 16:28:47,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:28:47,795 INFO L478 AbstractCegarLoop]: Abstraction has 3356 states and 3949 transitions. [2022-04-06 16:28:47,795 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 6.529411764705882) internal successors, (222), 33 states have internal predecessors, (222), 33 states have call successors, (95), 33 states have call predecessors, (95), 31 states have return successors, (93), 31 states have call predecessors, (93), 32 states have call successors, (93) [2022-04-06 16:28:47,795 INFO L276 IsEmpty]: Start isEmpty. Operand 3356 states and 3949 transitions. [2022-04-06 16:28:47,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 613 [2022-04-06 16:28:47,801 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:28:47,801 INFO L499 BasicCegarLoop]: trace histogram [94, 93, 93, 32, 31, 31, 31, 31, 31, 31, 31, 31, 31, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:28:47,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-04-06 16:28:48,025 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:28:48,025 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:28:48,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:28:48,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1466715250, now seen corresponding path program 61 times [2022-04-06 16:28:48,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:28:48,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1261448278] [2022-04-06 16:28:48,026 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:28:48,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1466715250, now seen corresponding path program 62 times [2022-04-06 16:28:48,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:28:48,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523662431] [2022-04-06 16:28:48,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:28:48,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:28:48,038 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:28:48,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1956875178] [2022-04-06 16:28:48,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:28:48,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:28:48,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:28:48,039 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:28:48,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-04-06 16:28:48,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:28:48,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:28:48,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 1339 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-06 16:28:48,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:28:49,257 INFO L134 CoverageAnalysis]: Checked inductivity of 20619 backedges. 186 proven. 20057 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2022-04-06 16:28:49,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:28:49,943 INFO L134 CoverageAnalysis]: Checked inductivity of 20619 backedges. 186 proven. 3317 refuted. 0 times theorem prover too weak. 17116 trivial. 0 not checked. [2022-04-06 16:28:49,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:28:49,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523662431] [2022-04-06 16:28:49,944 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:28:49,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956875178] [2022-04-06 16:28:49,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956875178] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:28:49,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:28:49,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 54 [2022-04-06 16:28:49,944 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:28:49,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1261448278] [2022-04-06 16:28:49,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1261448278] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:28:49,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:28:49,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-04-06 16:28:49,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056687675] [2022-04-06 16:28:49,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:28:49,945 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 16:28:49,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:28:49,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 16:28:49,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 16:28:49,947 INFO L87 Difference]: Start difference. First operand 3356 states and 3949 transitions. Second operand has 35 states, 35 states have (on average 6.542857142857143) internal successors, (229), 34 states have internal predecessors, (229), 34 states have call successors, (98), 34 states have call predecessors, (98), 32 states have return successors, (96), 32 states have call predecessors, (96), 33 states have call successors, (96) [2022-04-06 16:28:51,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:28:51,675 INFO L93 Difference]: Finished difference Result 3480 states and 4105 transitions. [2022-04-06 16:28:51,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-04-06 16:28:51,675 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 6.542857142857143) internal successors, (229), 34 states have internal predecessors, (229), 34 states have call successors, (98), 34 states have call predecessors, (98), 32 states have return successors, (96), 32 states have call predecessors, (96), 33 states have call successors, (96) Word has length 612 [2022-04-06 16:28:51,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:28:51,684 INFO L225 Difference]: With dead ends: 3480 [2022-04-06 16:28:51,684 INFO L226 Difference]: Without dead ends: 3471 [2022-04-06 16:28:51,685 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1254 GetRequests, 1170 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2974, Invalid=4166, Unknown=0, NotChecked=0, Total=7140 [2022-04-06 16:28:51,685 INFO L913 BasicCegarLoop]: 125 mSDtfsCounter, 103 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 16:28:51,685 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 484 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 16:28:51,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3471 states. [2022-04-06 16:28:52,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3471 to 3469. [2022-04-06 16:28:52,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3469 states, 2256 states have (on average 1.0984042553191489) internal successors, (2478), 2342 states have internal predecessors, (2478), 804 states have call successors, (804), 409 states have call predecessors, (804), 408 states have return successors, (801), 717 states have call predecessors, (801), 801 states have call successors, (801) [2022-04-06 16:28:52,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3469 states to 3469 states and 4083 transitions. [2022-04-06 16:28:52,802 INFO L78 Accepts]: Start accepts. Automaton has 3469 states and 4083 transitions. Word has length 612 [2022-04-06 16:28:52,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:28:52,803 INFO L478 AbstractCegarLoop]: Abstraction has 3469 states and 4083 transitions. [2022-04-06 16:28:52,803 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 6.542857142857143) internal successors, (229), 34 states have internal predecessors, (229), 34 states have call successors, (98), 34 states have call predecessors, (98), 32 states have return successors, (96), 32 states have call predecessors, (96), 33 states have call successors, (96) [2022-04-06 16:28:52,803 INFO L276 IsEmpty]: Start isEmpty. Operand 3469 states and 4083 transitions. [2022-04-06 16:28:52,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 632 [2022-04-06 16:28:52,809 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:28:52,809 INFO L499 BasicCegarLoop]: trace histogram [97, 96, 96, 33, 32, 32, 32, 32, 32, 32, 32, 32, 32, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:28:52,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-04-06 16:28:53,019 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:28:53,020 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:28:53,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:28:53,020 INFO L85 PathProgramCache]: Analyzing trace with hash -2118163743, now seen corresponding path program 63 times [2022-04-06 16:28:53,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:28:53,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1872938962] [2022-04-06 16:28:53,021 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:28:53,021 INFO L85 PathProgramCache]: Analyzing trace with hash -2118163743, now seen corresponding path program 64 times [2022-04-06 16:28:53,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:28:53,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513134625] [2022-04-06 16:28:53,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:28:53,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:28:53,045 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:28:53,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1137812882] [2022-04-06 16:28:53,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:28:53,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:28:53,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:28:53,046 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:28:53,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-04-06 16:28:53,249 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:28:53,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:28:53,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 1379 conjuncts, 69 conjunts are in the unsatisfiable core [2022-04-06 16:28:53,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:28:54,233 INFO L134 CoverageAnalysis]: Checked inductivity of 21972 backedges. 192 proven. 21392 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2022-04-06 16:28:54,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:28:54,926 INFO L134 CoverageAnalysis]: Checked inductivity of 21972 backedges. 192 proven. 3536 refuted. 0 times theorem prover too weak. 18244 trivial. 0 not checked. [2022-04-06 16:28:54,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:28:54,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513134625] [2022-04-06 16:28:54,926 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:28:54,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137812882] [2022-04-06 16:28:54,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137812882] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:28:54,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:28:54,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 54 [2022-04-06 16:28:54,927 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:28:54,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1872938962] [2022-04-06 16:28:54,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1872938962] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:28:54,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:28:54,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-04-06 16:28:54,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504672969] [2022-04-06 16:28:54,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:28:54,928 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-06 16:28:54,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:28:54,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-06 16:28:54,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 16:28:54,928 INFO L87 Difference]: Start difference. First operand 3469 states and 4083 transitions. Second operand has 36 states, 36 states have (on average 6.555555555555555) internal successors, (236), 35 states have internal predecessors, (236), 35 states have call successors, (101), 35 states have call predecessors, (101), 33 states have return successors, (99), 33 states have call predecessors, (99), 34 states have call successors, (99) [2022-04-06 16:28:56,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:28:56,684 INFO L93 Difference]: Finished difference Result 3593 states and 4239 transitions. [2022-04-06 16:28:56,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-04-06 16:28:56,684 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 6.555555555555555) internal successors, (236), 35 states have internal predecessors, (236), 35 states have call successors, (101), 35 states have call predecessors, (101), 33 states have return successors, (99), 33 states have call predecessors, (99), 34 states have call successors, (99) Word has length 631 [2022-04-06 16:28:56,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:28:56,690 INFO L225 Difference]: With dead ends: 3593 [2022-04-06 16:28:56,690 INFO L226 Difference]: Without dead ends: 3584 [2022-04-06 16:28:56,691 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1293 GetRequests, 1208 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=3027, Invalid=4283, Unknown=0, NotChecked=0, Total=7310 [2022-04-06 16:28:56,691 INFO L913 BasicCegarLoop]: 128 mSDtfsCounter, 111 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 16:28:56,691 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 536 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 16:28:56,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3584 states. [2022-04-06 16:28:57,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3584 to 3582. [2022-04-06 16:28:57,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3582 states, 2329 states have (on average 1.09832546157149) internal successors, (2558), 2418 states have internal predecessors, (2558), 831 states have call successors, (831), 422 states have call predecessors, (831), 421 states have return successors, (828), 741 states have call predecessors, (828), 828 states have call successors, (828) [2022-04-06 16:28:57,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3582 states to 3582 states and 4217 transitions. [2022-04-06 16:28:57,811 INFO L78 Accepts]: Start accepts. Automaton has 3582 states and 4217 transitions. Word has length 631 [2022-04-06 16:28:57,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:28:57,811 INFO L478 AbstractCegarLoop]: Abstraction has 3582 states and 4217 transitions. [2022-04-06 16:28:57,811 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 6.555555555555555) internal successors, (236), 35 states have internal predecessors, (236), 35 states have call successors, (101), 35 states have call predecessors, (101), 33 states have return successors, (99), 33 states have call predecessors, (99), 34 states have call successors, (99) [2022-04-06 16:28:57,811 INFO L276 IsEmpty]: Start isEmpty. Operand 3582 states and 4217 transitions. [2022-04-06 16:28:57,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 651 [2022-04-06 16:28:57,818 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:28:57,818 INFO L499 BasicCegarLoop]: trace histogram [100, 99, 99, 34, 33, 33, 33, 33, 33, 33, 33, 33, 33, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:28:57,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-04-06 16:28:58,035 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:28:58,036 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:28:58,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:28:58,036 INFO L85 PathProgramCache]: Analyzing trace with hash -266043374, now seen corresponding path program 65 times [2022-04-06 16:28:58,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:28:58,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [691894081] [2022-04-06 16:28:58,037 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:28:58,037 INFO L85 PathProgramCache]: Analyzing trace with hash -266043374, now seen corresponding path program 66 times [2022-04-06 16:28:58,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:28:58,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017158591] [2022-04-06 16:28:58,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:28:58,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:28:58,048 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:28:58,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1657856031] [2022-04-06 16:28:58,048 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:28:58,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:28:58,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:28:58,049 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:28:58,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-04-06 16:28:58,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 62 check-sat command(s) [2022-04-06 16:28:58,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:28:58,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 1410 conjuncts, 71 conjunts are in the unsatisfiable core [2022-04-06 16:28:58,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:28:59,519 INFO L134 CoverageAnalysis]: Checked inductivity of 23368 backedges. 198 proven. 22770 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-04-06 16:28:59,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:29:00,534 INFO L134 CoverageAnalysis]: Checked inductivity of 23368 backedges. 198 proven. 3762 refuted. 0 times theorem prover too weak. 19408 trivial. 0 not checked. [2022-04-06 16:29:00,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:29:00,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017158591] [2022-04-06 16:29:00,534 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:29:00,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657856031] [2022-04-06 16:29:00,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657856031] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:29:00,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:29:00,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 54 [2022-04-06 16:29:00,535 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:29:00,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [691894081] [2022-04-06 16:29:00,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [691894081] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:29:00,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:29:00,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-04-06 16:29:00,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263675443] [2022-04-06 16:29:00,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:29:00,535 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 16:29:00,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:29:00,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 16:29:00,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 16:29:00,537 INFO L87 Difference]: Start difference. First operand 3582 states and 4217 transitions. Second operand has 37 states, 37 states have (on average 6.5675675675675675) internal successors, (243), 36 states have internal predecessors, (243), 36 states have call successors, (104), 36 states have call predecessors, (104), 34 states have return successors, (102), 34 states have call predecessors, (102), 35 states have call successors, (102) [2022-04-06 16:29:02,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:29:02,418 INFO L93 Difference]: Finished difference Result 3706 states and 4373 transitions. [2022-04-06 16:29:02,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-04-06 16:29:02,418 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 6.5675675675675675) internal successors, (243), 36 states have internal predecessors, (243), 36 states have call successors, (104), 36 states have call predecessors, (104), 34 states have return successors, (102), 34 states have call predecessors, (102), 35 states have call successors, (102) Word has length 650 [2022-04-06 16:29:02,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:29:02,441 INFO L225 Difference]: With dead ends: 3706 [2022-04-06 16:29:02,441 INFO L226 Difference]: Without dead ends: 3697 [2022-04-06 16:29:02,442 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1332 GetRequests, 1246 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=3080, Invalid=4402, Unknown=0, NotChecked=0, Total=7482 [2022-04-06 16:29:02,456 INFO L913 BasicCegarLoop]: 131 mSDtfsCounter, 118 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 16:29:02,456 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 498 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 16:29:02,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3697 states. [2022-04-06 16:29:03,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3697 to 3695. [2022-04-06 16:29:03,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3695 states, 2402 states have (on average 1.0982514571190674) internal successors, (2638), 2494 states have internal predecessors, (2638), 858 states have call successors, (858), 435 states have call predecessors, (858), 434 states have return successors, (855), 765 states have call predecessors, (855), 855 states have call successors, (855) [2022-04-06 16:29:03,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3695 states to 3695 states and 4351 transitions. [2022-04-06 16:29:03,643 INFO L78 Accepts]: Start accepts. Automaton has 3695 states and 4351 transitions. Word has length 650 [2022-04-06 16:29:03,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:29:03,643 INFO L478 AbstractCegarLoop]: Abstraction has 3695 states and 4351 transitions. [2022-04-06 16:29:03,643 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 6.5675675675675675) internal successors, (243), 36 states have internal predecessors, (243), 36 states have call successors, (104), 36 states have call predecessors, (104), 34 states have return successors, (102), 34 states have call predecessors, (102), 35 states have call successors, (102) [2022-04-06 16:29:03,643 INFO L276 IsEmpty]: Start isEmpty. Operand 3695 states and 4351 transitions. [2022-04-06 16:29:03,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 670 [2022-04-06 16:29:03,651 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:29:03,651 INFO L499 BasicCegarLoop]: trace histogram [103, 102, 102, 35, 34, 34, 34, 34, 34, 34, 34, 34, 34, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:29:03,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-04-06 16:29:03,859 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-04-06 16:29:03,859 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:29:03,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:29:03,859 INFO L85 PathProgramCache]: Analyzing trace with hash 14830401, now seen corresponding path program 67 times [2022-04-06 16:29:03,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:29:03,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [270538045] [2022-04-06 16:29:03,860 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:29:03,860 INFO L85 PathProgramCache]: Analyzing trace with hash 14830401, now seen corresponding path program 68 times [2022-04-06 16:29:03,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:29:03,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380243767] [2022-04-06 16:29:03,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:29:03,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:29:03,874 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:29:03,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1547464205] [2022-04-06 16:29:03,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:29:03,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:29:03,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:29:03,875 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:29:03,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-04-06 16:29:04,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:29:04,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:29:04,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 1459 conjuncts, 73 conjunts are in the unsatisfiable core [2022-04-06 16:29:04,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:29:05,428 INFO L134 CoverageAnalysis]: Checked inductivity of 24807 backedges. 204 proven. 24191 refuted. 0 times theorem prover too weak. 412 trivial. 0 not checked. [2022-04-06 16:29:05,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:29:06,661 INFO L134 CoverageAnalysis]: Checked inductivity of 24807 backedges. 204 proven. 3995 refuted. 0 times theorem prover too weak. 20608 trivial. 0 not checked. [2022-04-06 16:29:06,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:29:06,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380243767] [2022-04-06 16:29:06,662 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:29:06,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547464205] [2022-04-06 16:29:06,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547464205] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:29:06,662 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:29:06,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 54 [2022-04-06 16:29:06,662 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:29:06,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [270538045] [2022-04-06 16:29:06,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [270538045] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:29:06,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:29:06,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-04-06 16:29:06,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115183745] [2022-04-06 16:29:06,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:29:06,663 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-04-06 16:29:06,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:29:06,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-04-06 16:29:06,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 16:29:06,664 INFO L87 Difference]: Start difference. First operand 3695 states and 4351 transitions. Second operand has 38 states, 38 states have (on average 6.578947368421052) internal successors, (250), 37 states have internal predecessors, (250), 37 states have call successors, (107), 37 states have call predecessors, (107), 35 states have return successors, (105), 35 states have call predecessors, (105), 36 states have call successors, (105) [2022-04-06 16:29:08,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:29:08,652 INFO L93 Difference]: Finished difference Result 3819 states and 4507 transitions. [2022-04-06 16:29:08,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-04-06 16:29:08,653 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 6.578947368421052) internal successors, (250), 37 states have internal predecessors, (250), 37 states have call successors, (107), 37 states have call predecessors, (107), 35 states have return successors, (105), 35 states have call predecessors, (105), 36 states have call successors, (105) Word has length 669 [2022-04-06 16:29:08,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:29:08,660 INFO L225 Difference]: With dead ends: 3819 [2022-04-06 16:29:08,660 INFO L226 Difference]: Without dead ends: 3810 [2022-04-06 16:29:08,661 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1371 GetRequests, 1284 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3133, Invalid=4523, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 16:29:08,661 INFO L913 BasicCegarLoop]: 134 mSDtfsCounter, 133 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 16:29:08,661 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 520 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 16:29:08,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3810 states. [2022-04-06 16:29:09,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3810 to 3808. [2022-04-06 16:29:09,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3808 states, 2475 states have (on average 1.0981818181818181) internal successors, (2718), 2570 states have internal predecessors, (2718), 885 states have call successors, (885), 448 states have call predecessors, (885), 447 states have return successors, (882), 789 states have call predecessors, (882), 882 states have call successors, (882) [2022-04-06 16:29:09,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3808 states to 3808 states and 4485 transitions. [2022-04-06 16:29:09,865 INFO L78 Accepts]: Start accepts. Automaton has 3808 states and 4485 transitions. Word has length 669 [2022-04-06 16:29:09,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:29:09,865 INFO L478 AbstractCegarLoop]: Abstraction has 3808 states and 4485 transitions. [2022-04-06 16:29:09,865 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 6.578947368421052) internal successors, (250), 37 states have internal predecessors, (250), 37 states have call successors, (107), 37 states have call predecessors, (107), 35 states have return successors, (105), 35 states have call predecessors, (105), 36 states have call successors, (105) [2022-04-06 16:29:09,865 INFO L276 IsEmpty]: Start isEmpty. Operand 3808 states and 4485 transitions. [2022-04-06 16:29:09,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 689 [2022-04-06 16:29:09,872 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:29:09,872 INFO L499 BasicCegarLoop]: trace histogram [106, 105, 105, 36, 35, 35, 35, 35, 35, 35, 35, 35, 35, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:29:09,890 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-04-06 16:29:10,085 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:29:10,085 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:29:10,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:29:10,086 INFO L85 PathProgramCache]: Analyzing trace with hash 280558514, now seen corresponding path program 69 times [2022-04-06 16:29:10,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:29:10,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1035833915] [2022-04-06 16:29:10,086 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:29:10,086 INFO L85 PathProgramCache]: Analyzing trace with hash 280558514, now seen corresponding path program 70 times [2022-04-06 16:29:10,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:29:10,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573792303] [2022-04-06 16:29:10,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:29:10,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:29:10,099 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:29:10,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1942958575] [2022-04-06 16:29:10,100 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:29:10,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:29:10,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:29:10,101 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:29:10,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-04-06 16:29:10,312 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:29:10,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:29:10,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 75 conjunts are in the unsatisfiable core [2022-04-06 16:29:10,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:29:11,239 INFO L134 CoverageAnalysis]: Checked inductivity of 26289 backedges. 210 proven. 25655 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2022-04-06 16:29:11,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:29:12,058 INFO L134 CoverageAnalysis]: Checked inductivity of 26289 backedges. 210 proven. 4235 refuted. 0 times theorem prover too weak. 21844 trivial. 0 not checked. [2022-04-06 16:29:12,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:29:12,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573792303] [2022-04-06 16:29:12,059 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:29:12,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942958575] [2022-04-06 16:29:12,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942958575] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:29:12,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:29:12,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 54 [2022-04-06 16:29:12,059 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:29:12,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1035833915] [2022-04-06 16:29:12,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1035833915] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:29:12,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:29:12,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-04-06 16:29:12,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671008404] [2022-04-06 16:29:12,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:29:12,060 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-06 16:29:12,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:29:12,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-06 16:29:12,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 16:29:12,061 INFO L87 Difference]: Start difference. First operand 3808 states and 4485 transitions. Second operand has 39 states, 39 states have (on average 6.589743589743589) internal successors, (257), 38 states have internal predecessors, (257), 38 states have call successors, (110), 38 states have call predecessors, (110), 36 states have return successors, (108), 36 states have call predecessors, (108), 37 states have call successors, (108) [2022-04-06 16:29:14,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:29:14,146 INFO L93 Difference]: Finished difference Result 3932 states and 4641 transitions. [2022-04-06 16:29:14,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-04-06 16:29:14,146 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 6.589743589743589) internal successors, (257), 38 states have internal predecessors, (257), 38 states have call successors, (110), 38 states have call predecessors, (110), 36 states have return successors, (108), 36 states have call predecessors, (108), 37 states have call successors, (108) Word has length 688 [2022-04-06 16:29:14,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:29:14,153 INFO L225 Difference]: With dead ends: 3932 [2022-04-06 16:29:14,153 INFO L226 Difference]: Without dead ends: 3923 [2022-04-06 16:29:14,154 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1410 GetRequests, 1322 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3186, Invalid=4646, Unknown=0, NotChecked=0, Total=7832 [2022-04-06 16:29:14,156 INFO L913 BasicCegarLoop]: 137 mSDtfsCounter, 162 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 16:29:14,156 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 512 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 16:29:14,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3923 states. [2022-04-06 16:29:15,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3923 to 3921. [2022-04-06 16:29:15,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3921 states, 2548 states have (on average 1.098116169544741) internal successors, (2798), 2646 states have internal predecessors, (2798), 912 states have call successors, (912), 461 states have call predecessors, (912), 460 states have return successors, (909), 813 states have call predecessors, (909), 909 states have call successors, (909) [2022-04-06 16:29:15,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3921 states to 3921 states and 4619 transitions. [2022-04-06 16:29:15,392 INFO L78 Accepts]: Start accepts. Automaton has 3921 states and 4619 transitions. Word has length 688 [2022-04-06 16:29:15,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:29:15,393 INFO L478 AbstractCegarLoop]: Abstraction has 3921 states and 4619 transitions. [2022-04-06 16:29:15,393 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 6.589743589743589) internal successors, (257), 38 states have internal predecessors, (257), 38 states have call successors, (110), 38 states have call predecessors, (110), 36 states have return successors, (108), 36 states have call predecessors, (108), 37 states have call successors, (108) [2022-04-06 16:29:15,393 INFO L276 IsEmpty]: Start isEmpty. Operand 3921 states and 4619 transitions. [2022-04-06 16:29:15,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 708 [2022-04-06 16:29:15,401 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:29:15,401 INFO L499 BasicCegarLoop]: trace histogram [109, 108, 108, 37, 36, 36, 36, 36, 36, 36, 36, 36, 36, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:29:15,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-04-06 16:29:15,615 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-04-06 16:29:15,615 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:29:15,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:29:15,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1458826145, now seen corresponding path program 71 times [2022-04-06 16:29:15,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:29:15,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1697424869] [2022-04-06 16:29:15,616 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:29:15,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1458826145, now seen corresponding path program 72 times [2022-04-06 16:29:15,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:29:15,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395303220] [2022-04-06 16:29:15,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:29:15,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:29:15,628 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:29:15,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1693094966] [2022-04-06 16:29:15,628 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:29:15,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:29:15,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:29:15,629 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:29:15,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-04-06 16:29:16,250 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 70 check-sat command(s) [2022-04-06 16:29:16,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:29:16,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 1530 conjuncts, 77 conjunts are in the unsatisfiable core [2022-04-06 16:29:16,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:29:17,123 INFO L134 CoverageAnalysis]: Checked inductivity of 27814 backedges. 216 proven. 27162 refuted. 0 times theorem prover too weak. 436 trivial. 0 not checked. [2022-04-06 16:29:17,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:29:17,906 INFO L134 CoverageAnalysis]: Checked inductivity of 27814 backedges. 216 proven. 4482 refuted. 0 times theorem prover too weak. 23116 trivial. 0 not checked. [2022-04-06 16:29:17,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:29:17,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395303220] [2022-04-06 16:29:17,906 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:29:17,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693094966] [2022-04-06 16:29:17,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693094966] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:29:17,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:29:17,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 54 [2022-04-06 16:29:17,907 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:29:17,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1697424869] [2022-04-06 16:29:17,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1697424869] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:29:17,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:29:17,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-04-06 16:29:17,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728320555] [2022-04-06 16:29:17,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:29:17,908 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-04-06 16:29:17,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:29:17,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-04-06 16:29:17,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 16:29:17,909 INFO L87 Difference]: Start difference. First operand 3921 states and 4619 transitions. Second operand has 40 states, 40 states have (on average 6.6) internal successors, (264), 39 states have internal predecessors, (264), 39 states have call successors, (113), 39 states have call predecessors, (113), 37 states have return successors, (111), 37 states have call predecessors, (111), 38 states have call successors, (111) [2022-04-06 16:29:20,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:29:20,107 INFO L93 Difference]: Finished difference Result 4045 states and 4775 transitions. [2022-04-06 16:29:20,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-04-06 16:29:20,107 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 6.6) internal successors, (264), 39 states have internal predecessors, (264), 39 states have call successors, (113), 39 states have call predecessors, (113), 37 states have return successors, (111), 37 states have call predecessors, (111), 38 states have call successors, (111) Word has length 707 [2022-04-06 16:29:20,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:29:20,137 INFO L225 Difference]: With dead ends: 4045 [2022-04-06 16:29:20,137 INFO L226 Difference]: Without dead ends: 4036 [2022-04-06 16:29:20,138 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1449 GetRequests, 1360 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=3239, Invalid=4771, Unknown=0, NotChecked=0, Total=8010 [2022-04-06 16:29:20,138 INFO L913 BasicCegarLoop]: 140 mSDtfsCounter, 161 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 16:29:20,138 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 524 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 16:29:20,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4036 states. [2022-04-06 16:29:21,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4036 to 4034. [2022-04-06 16:29:21,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4034 states, 2621 states have (on average 1.0980541777947348) internal successors, (2878), 2722 states have internal predecessors, (2878), 939 states have call successors, (939), 474 states have call predecessors, (939), 473 states have return successors, (936), 837 states have call predecessors, (936), 936 states have call successors, (936) [2022-04-06 16:29:21,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4034 states to 4034 states and 4753 transitions. [2022-04-06 16:29:21,449 INFO L78 Accepts]: Start accepts. Automaton has 4034 states and 4753 transitions. Word has length 707 [2022-04-06 16:29:21,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:29:21,449 INFO L478 AbstractCegarLoop]: Abstraction has 4034 states and 4753 transitions. [2022-04-06 16:29:21,449 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 6.6) internal successors, (264), 39 states have internal predecessors, (264), 39 states have call successors, (113), 39 states have call predecessors, (113), 37 states have return successors, (111), 37 states have call predecessors, (111), 38 states have call successors, (111) [2022-04-06 16:29:21,449 INFO L276 IsEmpty]: Start isEmpty. Operand 4034 states and 4753 transitions. [2022-04-06 16:29:21,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 727 [2022-04-06 16:29:21,457 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:29:21,457 INFO L499 BasicCegarLoop]: trace histogram [112, 111, 111, 38, 37, 37, 37, 37, 37, 37, 37, 37, 37, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:29:21,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-04-06 16:29:21,671 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-04-06 16:29:21,671 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:29:21,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:29:21,672 INFO L85 PathProgramCache]: Analyzing trace with hash 968081234, now seen corresponding path program 73 times [2022-04-06 16:29:21,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:29:21,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [815729298] [2022-04-06 16:29:21,672 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:29:21,672 INFO L85 PathProgramCache]: Analyzing trace with hash 968081234, now seen corresponding path program 74 times [2022-04-06 16:29:21,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:29:21,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606930759] [2022-04-06 16:29:21,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:29:21,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:29:21,684 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:29:21,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [967278518] [2022-04-06 16:29:21,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:29:21,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:29:21,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:29:21,685 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:29:21,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-04-06 16:29:21,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:29:21,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:29:21,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 1579 conjuncts, 79 conjunts are in the unsatisfiable core [2022-04-06 16:29:21,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:29:22,799 INFO L134 CoverageAnalysis]: Checked inductivity of 29382 backedges. 222 proven. 28712 refuted. 0 times theorem prover too weak. 448 trivial. 0 not checked. [2022-04-06 16:29:22,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:29:23,726 INFO L134 CoverageAnalysis]: Checked inductivity of 29382 backedges. 222 proven. 4736 refuted. 0 times theorem prover too weak. 24424 trivial. 0 not checked. [2022-04-06 16:29:23,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:29:23,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606930759] [2022-04-06 16:29:23,726 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:29:23,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967278518] [2022-04-06 16:29:23,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967278518] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:29:23,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:29:23,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 54 [2022-04-06 16:29:23,727 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:29:23,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [815729298] [2022-04-06 16:29:23,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [815729298] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:29:23,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:29:23,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-04-06 16:29:23,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889090538] [2022-04-06 16:29:23,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:29:23,727 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-04-06 16:29:23,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:29:23,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-04-06 16:29:23,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 16:29:23,728 INFO L87 Difference]: Start difference. First operand 4034 states and 4753 transitions. Second operand has 41 states, 41 states have (on average 6.609756097560975) internal successors, (271), 40 states have internal predecessors, (271), 40 states have call successors, (116), 40 states have call predecessors, (116), 38 states have return successors, (114), 38 states have call predecessors, (114), 39 states have call successors, (114) [2022-04-06 16:29:25,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:29:25,884 INFO L93 Difference]: Finished difference Result 4158 states and 4909 transitions. [2022-04-06 16:29:25,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-04-06 16:29:25,884 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 6.609756097560975) internal successors, (271), 40 states have internal predecessors, (271), 40 states have call successors, (116), 40 states have call predecessors, (116), 38 states have return successors, (114), 38 states have call predecessors, (114), 39 states have call successors, (114) Word has length 726 [2022-04-06 16:29:25,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:29:25,909 INFO L225 Difference]: With dead ends: 4158 [2022-04-06 16:29:25,909 INFO L226 Difference]: Without dead ends: 4149 [2022-04-06 16:29:25,910 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1488 GetRequests, 1398 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=3292, Invalid=4898, Unknown=0, NotChecked=0, Total=8190 [2022-04-06 16:29:25,910 INFO L913 BasicCegarLoop]: 143 mSDtfsCounter, 160 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 16:29:25,911 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 556 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 16:29:25,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4149 states. [2022-04-06 16:29:27,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4149 to 4147. [2022-04-06 16:29:27,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4147 states, 2694 states have (on average 1.0979955456570156) internal successors, (2958), 2798 states have internal predecessors, (2958), 966 states have call successors, (966), 487 states have call predecessors, (966), 486 states have return successors, (963), 861 states have call predecessors, (963), 963 states have call successors, (963) [2022-04-06 16:29:27,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4147 states to 4147 states and 4887 transitions. [2022-04-06 16:29:27,217 INFO L78 Accepts]: Start accepts. Automaton has 4147 states and 4887 transitions. Word has length 726 [2022-04-06 16:29:27,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:29:27,218 INFO L478 AbstractCegarLoop]: Abstraction has 4147 states and 4887 transitions. [2022-04-06 16:29:27,218 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 6.609756097560975) internal successors, (271), 40 states have internal predecessors, (271), 40 states have call successors, (116), 40 states have call predecessors, (116), 38 states have return successors, (114), 38 states have call predecessors, (114), 39 states have call successors, (114) [2022-04-06 16:29:27,218 INFO L276 IsEmpty]: Start isEmpty. Operand 4147 states and 4887 transitions. [2022-04-06 16:29:27,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 746 [2022-04-06 16:29:27,225 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:29:27,226 INFO L499 BasicCegarLoop]: trace histogram [115, 114, 114, 39, 38, 38, 38, 38, 38, 38, 38, 38, 38, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:29:27,244 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-04-06 16:29:27,443 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-04-06 16:29:27,444 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:29:27,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:29:27,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1825946623, now seen corresponding path program 75 times [2022-04-06 16:29:27,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:29:27,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1683816062] [2022-04-06 16:29:27,445 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:29:27,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1825946623, now seen corresponding path program 76 times [2022-04-06 16:29:27,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:29:27,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876273073] [2022-04-06 16:29:27,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:29:27,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:29:27,456 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:29:27,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [872170904] [2022-04-06 16:29:27,456 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:29:27,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:29:27,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:29:27,457 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:29:27,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-04-06 16:29:27,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:29:27,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:29:27,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 1619 conjuncts, 81 conjunts are in the unsatisfiable core [2022-04-06 16:29:27,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:29:29,179 INFO L134 CoverageAnalysis]: Checked inductivity of 30993 backedges. 228 proven. 30305 refuted. 0 times theorem prover too weak. 460 trivial. 0 not checked. [2022-04-06 16:29:29,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:29:29,987 INFO L134 CoverageAnalysis]: Checked inductivity of 30993 backedges. 228 proven. 4997 refuted. 0 times theorem prover too weak. 25768 trivial. 0 not checked. [2022-04-06 16:29:29,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:29:29,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876273073] [2022-04-06 16:29:29,988 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:29:29,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872170904] [2022-04-06 16:29:29,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872170904] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:29:29,988 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:29:29,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 54 [2022-04-06 16:29:29,988 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:29:29,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1683816062] [2022-04-06 16:29:29,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1683816062] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:29:29,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:29:29,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-04-06 16:29:29,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601232783] [2022-04-06 16:29:29,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:29:29,989 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-04-06 16:29:29,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:29:29,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-04-06 16:29:29,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 16:29:29,990 INFO L87 Difference]: Start difference. First operand 4147 states and 4887 transitions. Second operand has 42 states, 42 states have (on average 6.619047619047619) internal successors, (278), 41 states have internal predecessors, (278), 41 states have call successors, (119), 41 states have call predecessors, (119), 39 states have return successors, (117), 39 states have call predecessors, (117), 40 states have call successors, (117) [2022-04-06 16:29:32,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:29:32,254 INFO L93 Difference]: Finished difference Result 4271 states and 5043 transitions. [2022-04-06 16:29:32,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-04-06 16:29:32,255 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 6.619047619047619) internal successors, (278), 41 states have internal predecessors, (278), 41 states have call successors, (119), 41 states have call predecessors, (119), 39 states have return successors, (117), 39 states have call predecessors, (117), 40 states have call successors, (117) Word has length 745 [2022-04-06 16:29:32,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:29:32,263 INFO L225 Difference]: With dead ends: 4271 [2022-04-06 16:29:32,263 INFO L226 Difference]: Without dead ends: 4262 [2022-04-06 16:29:32,264 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1527 GetRequests, 1436 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3345, Invalid=5027, Unknown=0, NotChecked=0, Total=8372 [2022-04-06 16:29:32,264 INFO L913 BasicCegarLoop]: 146 mSDtfsCounter, 137 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 16:29:32,264 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 548 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 16:29:32,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4262 states. [2022-04-06 16:29:33,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4262 to 4260. [2022-04-06 16:29:33,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4260 states, 2767 states have (on average 1.0979400072280447) internal successors, (3038), 2874 states have internal predecessors, (3038), 993 states have call successors, (993), 500 states have call predecessors, (993), 499 states have return successors, (990), 885 states have call predecessors, (990), 990 states have call successors, (990) [2022-04-06 16:29:33,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4260 states to 4260 states and 5021 transitions. [2022-04-06 16:29:33,647 INFO L78 Accepts]: Start accepts. Automaton has 4260 states and 5021 transitions. Word has length 745 [2022-04-06 16:29:33,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:29:33,647 INFO L478 AbstractCegarLoop]: Abstraction has 4260 states and 5021 transitions. [2022-04-06 16:29:33,648 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 6.619047619047619) internal successors, (278), 41 states have internal predecessors, (278), 41 states have call successors, (119), 41 states have call predecessors, (119), 39 states have return successors, (117), 39 states have call predecessors, (117), 40 states have call successors, (117) [2022-04-06 16:29:33,648 INFO L276 IsEmpty]: Start isEmpty. Operand 4260 states and 5021 transitions. [2022-04-06 16:29:33,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 765 [2022-04-06 16:29:33,656 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:29:33,656 INFO L499 BasicCegarLoop]: trace histogram [118, 117, 117, 40, 39, 39, 39, 39, 39, 39, 39, 39, 39, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:29:33,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-04-06 16:29:33,874 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-04-06 16:29:33,875 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:29:33,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:29:33,875 INFO L85 PathProgramCache]: Analyzing trace with hash 874433266, now seen corresponding path program 77 times [2022-04-06 16:29:33,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:29:33,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [70739984] [2022-04-06 16:29:33,876 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:29:33,876 INFO L85 PathProgramCache]: Analyzing trace with hash 874433266, now seen corresponding path program 78 times [2022-04-06 16:29:33,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:29:33,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531730132] [2022-04-06 16:29:33,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:29:33,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:29:33,887 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:29:33,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [687982043] [2022-04-06 16:29:33,888 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:29:33,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:29:33,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:29:33,891 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:29:33,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-04-06 16:29:57,009 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 78 check-sat command(s) [2022-04-06 16:29:57,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:29:57,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 1659 conjuncts, 83 conjunts are in the unsatisfiable core [2022-04-06 16:29:57,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:29:58,095 INFO L134 CoverageAnalysis]: Checked inductivity of 32647 backedges. 234 proven. 31941 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2022-04-06 16:29:58,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:29:58,804 INFO L134 CoverageAnalysis]: Checked inductivity of 32647 backedges. 234 proven. 5265 refuted. 0 times theorem prover too weak. 27148 trivial. 0 not checked. [2022-04-06 16:29:58,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:29:58,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531730132] [2022-04-06 16:29:58,804 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:29:58,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687982043] [2022-04-06 16:29:58,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687982043] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:29:58,804 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:29:58,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 54 [2022-04-06 16:29:58,805 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:29:58,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [70739984] [2022-04-06 16:29:58,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [70739984] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:29:58,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:29:58,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-04-06 16:29:58,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898838102] [2022-04-06 16:29:58,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:29:58,806 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-06 16:29:58,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:29:58,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-06 16:29:58,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 16:29:58,807 INFO L87 Difference]: Start difference. First operand 4260 states and 5021 transitions. Second operand has 43 states, 43 states have (on average 6.627906976744186) internal successors, (285), 42 states have internal predecessors, (285), 42 states have call successors, (122), 42 states have call predecessors, (122), 40 states have return successors, (120), 40 states have call predecessors, (120), 41 states have call successors, (120) [2022-04-06 16:30:00,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:30:01,000 INFO L93 Difference]: Finished difference Result 4384 states and 5177 transitions. [2022-04-06 16:30:01,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-04-06 16:30:01,000 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 6.627906976744186) internal successors, (285), 42 states have internal predecessors, (285), 42 states have call successors, (122), 42 states have call predecessors, (122), 40 states have return successors, (120), 40 states have call predecessors, (120), 41 states have call successors, (120) Word has length 764 [2022-04-06 16:30:01,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:30:01,008 INFO L225 Difference]: With dead ends: 4384 [2022-04-06 16:30:01,008 INFO L226 Difference]: Without dead ends: 4375 [2022-04-06 16:30:01,009 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1566 GetRequests, 1474 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=3398, Invalid=5158, Unknown=0, NotChecked=0, Total=8556 [2022-04-06 16:30:01,009 INFO L913 BasicCegarLoop]: 149 mSDtfsCounter, 115 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 16:30:01,009 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 630 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 754 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 16:30:01,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4375 states. [2022-04-06 16:30:02,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4375 to 4373. [2022-04-06 16:30:02,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4373 states, 2840 states have (on average 1.097887323943662) internal successors, (3118), 2950 states have internal predecessors, (3118), 1020 states have call successors, (1020), 513 states have call predecessors, (1020), 512 states have return successors, (1017), 909 states have call predecessors, (1017), 1017 states have call successors, (1017) [2022-04-06 16:30:02,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4373 states to 4373 states and 5155 transitions. [2022-04-06 16:30:02,450 INFO L78 Accepts]: Start accepts. Automaton has 4373 states and 5155 transitions. Word has length 764 [2022-04-06 16:30:02,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:30:02,450 INFO L478 AbstractCegarLoop]: Abstraction has 4373 states and 5155 transitions. [2022-04-06 16:30:02,450 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 6.627906976744186) internal successors, (285), 42 states have internal predecessors, (285), 42 states have call successors, (122), 42 states have call predecessors, (122), 40 states have return successors, (120), 40 states have call predecessors, (120), 41 states have call successors, (120) [2022-04-06 16:30:02,451 INFO L276 IsEmpty]: Start isEmpty. Operand 4373 states and 5155 transitions. [2022-04-06 16:30:02,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 784 [2022-04-06 16:30:02,459 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:30:02,459 INFO L499 BasicCegarLoop]: trace histogram [121, 120, 120, 41, 40, 40, 40, 40, 40, 40, 40, 40, 40, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:30:02,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-04-06 16:30:02,674 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:30:02,674 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:30:02,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:30:02,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1405397919, now seen corresponding path program 79 times [2022-04-06 16:30:02,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:02,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1166821815] [2022-04-06 16:30:02,675 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:30:02,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1405397919, now seen corresponding path program 80 times [2022-04-06 16:30:02,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:30:02,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192226462] [2022-04-06 16:30:02,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:30:02,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:30:02,719 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:30:02,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1098385057] [2022-04-06 16:30:02,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:30:02,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:30:02,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:30:02,726 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:30:02,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-04-06 16:30:02,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:30:02,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:30:02,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 1699 conjuncts, 85 conjunts are in the unsatisfiable core [2022-04-06 16:30:02,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:30:04,464 INFO L134 CoverageAnalysis]: Checked inductivity of 34344 backedges. 240 proven. 33620 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-04-06 16:30:04,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:30:05,348 INFO L134 CoverageAnalysis]: Checked inductivity of 34344 backedges. 240 proven. 5540 refuted. 0 times theorem prover too weak. 28564 trivial. 0 not checked. [2022-04-06 16:30:05,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:30:05,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192226462] [2022-04-06 16:30:05,348 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:30:05,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098385057] [2022-04-06 16:30:05,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098385057] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:30:05,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:30:05,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 54 [2022-04-06 16:30:05,349 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:30:05,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1166821815] [2022-04-06 16:30:05,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1166821815] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:30:05,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:30:05,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-04-06 16:30:05,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993330778] [2022-04-06 16:30:05,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:30:05,349 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-04-06 16:30:05,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:05,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-04-06 16:30:05,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 16:30:05,350 INFO L87 Difference]: Start difference. First operand 4373 states and 5155 transitions. Second operand has 44 states, 44 states have (on average 6.636363636363637) internal successors, (292), 43 states have internal predecessors, (292), 43 states have call successors, (125), 43 states have call predecessors, (125), 41 states have return successors, (123), 41 states have call predecessors, (123), 42 states have call successors, (123) [2022-04-06 16:30:07,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:30:07,827 INFO L93 Difference]: Finished difference Result 4497 states and 5311 transitions. [2022-04-06 16:30:07,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-04-06 16:30:07,828 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 6.636363636363637) internal successors, (292), 43 states have internal predecessors, (292), 43 states have call successors, (125), 43 states have call predecessors, (125), 41 states have return successors, (123), 41 states have call predecessors, (123), 42 states have call successors, (123) Word has length 783 [2022-04-06 16:30:07,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:30:07,835 INFO L225 Difference]: With dead ends: 4497 [2022-04-06 16:30:07,835 INFO L226 Difference]: Without dead ends: 4488 [2022-04-06 16:30:07,836 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1605 GetRequests, 1512 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3451, Invalid=5291, Unknown=0, NotChecked=0, Total=8742 [2022-04-06 16:30:07,836 INFO L913 BasicCegarLoop]: 152 mSDtfsCounter, 118 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 16:30:07,836 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 622 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 16:30:07,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4488 states. [2022-04-06 16:30:09,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4488 to 4486. [2022-04-06 16:30:09,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4486 states, 2913 states have (on average 1.09783728115345) internal successors, (3198), 3026 states have internal predecessors, (3198), 1047 states have call successors, (1047), 526 states have call predecessors, (1047), 525 states have return successors, (1044), 933 states have call predecessors, (1044), 1044 states have call successors, (1044) [2022-04-06 16:30:09,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4486 states to 4486 states and 5289 transitions. [2022-04-06 16:30:09,260 INFO L78 Accepts]: Start accepts. Automaton has 4486 states and 5289 transitions. Word has length 783 [2022-04-06 16:30:09,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:30:09,260 INFO L478 AbstractCegarLoop]: Abstraction has 4486 states and 5289 transitions. [2022-04-06 16:30:09,260 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 6.636363636363637) internal successors, (292), 43 states have internal predecessors, (292), 43 states have call successors, (125), 43 states have call predecessors, (125), 41 states have return successors, (123), 41 states have call predecessors, (123), 42 states have call successors, (123) [2022-04-06 16:30:09,261 INFO L276 IsEmpty]: Start isEmpty. Operand 4486 states and 5289 transitions. [2022-04-06 16:30:09,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 803 [2022-04-06 16:30:09,268 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:30:09,269 INFO L499 BasicCegarLoop]: trace histogram [124, 123, 123, 42, 41, 41, 41, 41, 41, 41, 41, 41, 41, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:30:09,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-04-06 16:30:09,482 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:30:09,482 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:30:09,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:30:09,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1316741486, now seen corresponding path program 81 times [2022-04-06 16:30:09,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:09,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1443209478] [2022-04-06 16:30:09,483 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:30:09,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1316741486, now seen corresponding path program 82 times [2022-04-06 16:30:09,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:30:09,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008997137] [2022-04-06 16:30:09,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:30:09,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:30:09,499 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:30:09,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1102613274] [2022-04-06 16:30:09,500 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:30:09,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:30:09,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:30:09,500 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:30:09,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-04-06 16:30:09,758 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:30:09,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:30:09,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 1739 conjuncts, 87 conjunts are in the unsatisfiable core [2022-04-06 16:30:09,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:30:11,099 INFO L134 CoverageAnalysis]: Checked inductivity of 36084 backedges. 246 proven. 35342 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2022-04-06 16:30:11,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:30:11,987 INFO L134 CoverageAnalysis]: Checked inductivity of 36084 backedges. 246 proven. 5822 refuted. 0 times theorem prover too weak. 30016 trivial. 0 not checked. [2022-04-06 16:30:11,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:30:11,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008997137] [2022-04-06 16:30:11,988 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:30:11,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102613274] [2022-04-06 16:30:11,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102613274] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:30:11,988 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:30:11,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 54 [2022-04-06 16:30:11,988 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:30:11,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1443209478] [2022-04-06 16:30:11,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1443209478] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:30:11,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:30:11,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-04-06 16:30:11,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421111276] [2022-04-06 16:30:11,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:30:11,989 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-06 16:30:11,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:11,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-06 16:30:11,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 16:30:11,990 INFO L87 Difference]: Start difference. First operand 4486 states and 5289 transitions. Second operand has 45 states, 45 states have (on average 6.644444444444445) internal successors, (299), 44 states have internal predecessors, (299), 44 states have call successors, (128), 44 states have call predecessors, (128), 42 states have return successors, (126), 42 states have call predecessors, (126), 43 states have call successors, (126) [2022-04-06 16:30:14,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:30:14,173 INFO L93 Difference]: Finished difference Result 4610 states and 5445 transitions. [2022-04-06 16:30:14,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-04-06 16:30:14,174 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 6.644444444444445) internal successors, (299), 44 states have internal predecessors, (299), 44 states have call successors, (128), 44 states have call predecessors, (128), 42 states have return successors, (126), 42 states have call predecessors, (126), 43 states have call successors, (126) Word has length 802 [2022-04-06 16:30:14,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:30:14,181 INFO L225 Difference]: With dead ends: 4610 [2022-04-06 16:30:14,181 INFO L226 Difference]: Without dead ends: 4601 [2022-04-06 16:30:14,182 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1644 GetRequests, 1550 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 918 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=3504, Invalid=5426, Unknown=0, NotChecked=0, Total=8930 [2022-04-06 16:30:14,182 INFO L913 BasicCegarLoop]: 155 mSDtfsCounter, 137 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 16:30:14,183 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 614 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 16:30:14,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4601 states. [2022-04-06 16:30:15,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4601 to 4599. [2022-04-06 16:30:15,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4599 states, 2986 states have (on average 1.0977896851975888) internal successors, (3278), 3102 states have internal predecessors, (3278), 1074 states have call successors, (1074), 539 states have call predecessors, (1074), 538 states have return successors, (1071), 957 states have call predecessors, (1071), 1071 states have call successors, (1071) [2022-04-06 16:30:15,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4599 states to 4599 states and 5423 transitions. [2022-04-06 16:30:15,665 INFO L78 Accepts]: Start accepts. Automaton has 4599 states and 5423 transitions. Word has length 802 [2022-04-06 16:30:15,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:30:15,666 INFO L478 AbstractCegarLoop]: Abstraction has 4599 states and 5423 transitions. [2022-04-06 16:30:15,666 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 6.644444444444445) internal successors, (299), 44 states have internal predecessors, (299), 44 states have call successors, (128), 44 states have call predecessors, (128), 42 states have return successors, (126), 42 states have call predecessors, (126), 43 states have call successors, (126) [2022-04-06 16:30:15,666 INFO L276 IsEmpty]: Start isEmpty. Operand 4599 states and 5423 transitions. [2022-04-06 16:30:15,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 822 [2022-04-06 16:30:15,674 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:30:15,674 INFO L499 BasicCegarLoop]: trace histogram [127, 126, 126, 43, 42, 42, 42, 42, 42, 42, 42, 42, 42, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:30:15,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-04-06 16:30:15,893 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:30:15,893 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:30:15,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:30:15,893 INFO L85 PathProgramCache]: Analyzing trace with hash -530768703, now seen corresponding path program 83 times [2022-04-06 16:30:15,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:15,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [919543833] [2022-04-06 16:30:15,894 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:30:15,894 INFO L85 PathProgramCache]: Analyzing trace with hash -530768703, now seen corresponding path program 84 times [2022-04-06 16:30:15,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:30:15,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074976884] [2022-04-06 16:30:15,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:30:15,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:30:15,906 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:30:15,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1417374190] [2022-04-06 16:30:15,906 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:30:15,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:30:15,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:30:15,907 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:30:15,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-04-06 16:30:19,512 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 81 check-sat command(s) [2022-04-06 16:30:19,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:30:19,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 1779 conjuncts, 89 conjunts are in the unsatisfiable core [2022-04-06 16:30:19,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:30:21,290 INFO L134 CoverageAnalysis]: Checked inductivity of 37867 backedges. 252 proven. 37107 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2022-04-06 16:30:21,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:30:22,601 INFO L134 CoverageAnalysis]: Checked inductivity of 37867 backedges. 252 proven. 6111 refuted. 0 times theorem prover too weak. 31504 trivial. 0 not checked. [2022-04-06 16:30:22,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:30:22,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074976884] [2022-04-06 16:30:22,602 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:30:22,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417374190] [2022-04-06 16:30:22,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417374190] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:30:22,602 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:30:22,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 54 [2022-04-06 16:30:22,602 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:30:22,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [919543833] [2022-04-06 16:30:22,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [919543833] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:30:22,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:30:22,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-04-06 16:30:22,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920525331] [2022-04-06 16:30:22,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:30:22,603 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-04-06 16:30:22,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:22,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-04-06 16:30:22,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 16:30:22,604 INFO L87 Difference]: Start difference. First operand 4599 states and 5423 transitions. Second operand has 46 states, 46 states have (on average 6.6521739130434785) internal successors, (306), 45 states have internal predecessors, (306), 45 states have call successors, (131), 45 states have call predecessors, (131), 43 states have return successors, (129), 43 states have call predecessors, (129), 44 states have call successors, (129) [2022-04-06 16:30:25,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:30:25,181 INFO L93 Difference]: Finished difference Result 4723 states and 5579 transitions. [2022-04-06 16:30:25,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-04-06 16:30:25,182 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 6.6521739130434785) internal successors, (306), 45 states have internal predecessors, (306), 45 states have call successors, (131), 45 states have call predecessors, (131), 43 states have return successors, (129), 43 states have call predecessors, (129), 44 states have call successors, (129) Word has length 821 [2022-04-06 16:30:25,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:30:25,190 INFO L225 Difference]: With dead ends: 4723 [2022-04-06 16:30:25,190 INFO L226 Difference]: Without dead ends: 4714 [2022-04-06 16:30:25,191 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1683 GetRequests, 1588 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3557, Invalid=5563, Unknown=0, NotChecked=0, Total=9120 [2022-04-06 16:30:25,191 INFO L913 BasicCegarLoop]: 158 mSDtfsCounter, 157 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 16:30:25,191 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 616 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 16:30:25,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4714 states. [2022-04-06 16:30:26,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4714 to 4712. [2022-04-06 16:30:26,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4712 states, 3059 states have (on average 1.0977443609022557) internal successors, (3358), 3178 states have internal predecessors, (3358), 1101 states have call successors, (1101), 552 states have call predecessors, (1101), 551 states have return successors, (1098), 981 states have call predecessors, (1098), 1098 states have call successors, (1098) [2022-04-06 16:30:26,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4712 states to 4712 states and 5557 transitions. [2022-04-06 16:30:26,715 INFO L78 Accepts]: Start accepts. Automaton has 4712 states and 5557 transitions. Word has length 821 [2022-04-06 16:30:26,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:30:26,716 INFO L478 AbstractCegarLoop]: Abstraction has 4712 states and 5557 transitions. [2022-04-06 16:30:26,716 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 6.6521739130434785) internal successors, (306), 45 states have internal predecessors, (306), 45 states have call successors, (131), 45 states have call predecessors, (131), 43 states have return successors, (129), 43 states have call predecessors, (129), 44 states have call successors, (129) [2022-04-06 16:30:26,716 INFO L276 IsEmpty]: Start isEmpty. Operand 4712 states and 5557 transitions. [2022-04-06 16:30:26,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 841 [2022-04-06 16:30:26,724 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:30:26,725 INFO L499 BasicCegarLoop]: trace histogram [130, 129, 129, 44, 43, 43, 43, 43, 43, 43, 43, 43, 43, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:30:26,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-04-06 16:30:26,928 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2022-04-06 16:30:26,928 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:30:26,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:30:26,928 INFO L85 PathProgramCache]: Analyzing trace with hash -336741838, now seen corresponding path program 85 times [2022-04-06 16:30:26,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:26,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1161955765] [2022-04-06 16:30:26,929 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:30:26,929 INFO L85 PathProgramCache]: Analyzing trace with hash -336741838, now seen corresponding path program 86 times [2022-04-06 16:30:26,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:30:26,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420225475] [2022-04-06 16:30:26,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:30:26,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:30:26,944 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:30:26,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1617621475] [2022-04-06 16:30:26,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:30:26,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:30:26,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:30:26,945 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:30:26,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-04-06 16:30:27,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:30:27,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:30:27,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 1819 conjuncts, 91 conjunts are in the unsatisfiable core [2022-04-06 16:30:27,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:30:28,399 INFO L134 CoverageAnalysis]: Checked inductivity of 39693 backedges. 258 proven. 38915 refuted. 0 times theorem prover too weak. 520 trivial. 0 not checked. [2022-04-06 16:30:28,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:30:29,597 INFO L134 CoverageAnalysis]: Checked inductivity of 39693 backedges. 258 proven. 6407 refuted. 0 times theorem prover too weak. 33028 trivial. 0 not checked. [2022-04-06 16:30:29,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:30:29,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420225475] [2022-04-06 16:30:29,597 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:30:29,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617621475] [2022-04-06 16:30:29,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617621475] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:30:29,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:30:29,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 54 [2022-04-06 16:30:29,598 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:30:29,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1161955765] [2022-04-06 16:30:29,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1161955765] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:30:29,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:30:29,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-04-06 16:30:29,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852323012] [2022-04-06 16:30:29,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:30:29,599 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-04-06 16:30:29,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:29,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-04-06 16:30:29,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 16:30:29,599 INFO L87 Difference]: Start difference. First operand 4712 states and 5557 transitions. Second operand has 47 states, 47 states have (on average 6.659574468085107) internal successors, (313), 46 states have internal predecessors, (313), 46 states have call successors, (134), 46 states have call predecessors, (134), 44 states have return successors, (132), 44 states have call predecessors, (132), 45 states have call successors, (132) [2022-04-06 16:30:32,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:30:32,236 INFO L93 Difference]: Finished difference Result 4836 states and 5713 transitions. [2022-04-06 16:30:32,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-04-06 16:30:32,237 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 6.659574468085107) internal successors, (313), 46 states have internal predecessors, (313), 46 states have call successors, (134), 46 states have call predecessors, (134), 44 states have return successors, (132), 44 states have call predecessors, (132), 45 states have call successors, (132) Word has length 840 [2022-04-06 16:30:32,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:30:32,245 INFO L225 Difference]: With dead ends: 4836 [2022-04-06 16:30:32,245 INFO L226 Difference]: Without dead ends: 4827 [2022-04-06 16:30:32,246 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1722 GetRequests, 1626 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3610, Invalid=5702, Unknown=0, NotChecked=0, Total=9312 [2022-04-06 16:30:32,246 INFO L913 BasicCegarLoop]: 161 mSDtfsCounter, 130 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 16:30:32,246 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 658 Invalid, 909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 16:30:32,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4827 states. [2022-04-06 16:30:33,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4827 to 4825. [2022-04-06 16:30:33,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4825 states, 3132 states have (on average 1.0977011494252873) internal successors, (3438), 3254 states have internal predecessors, (3438), 1128 states have call successors, (1128), 565 states have call predecessors, (1128), 564 states have return successors, (1125), 1005 states have call predecessors, (1125), 1125 states have call successors, (1125) [2022-04-06 16:30:33,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4825 states to 4825 states and 5691 transitions. [2022-04-06 16:30:33,791 INFO L78 Accepts]: Start accepts. Automaton has 4825 states and 5691 transitions. Word has length 840 [2022-04-06 16:30:33,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:30:33,791 INFO L478 AbstractCegarLoop]: Abstraction has 4825 states and 5691 transitions. [2022-04-06 16:30:33,792 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 6.659574468085107) internal successors, (313), 46 states have internal predecessors, (313), 46 states have call successors, (134), 46 states have call predecessors, (134), 44 states have return successors, (132), 44 states have call predecessors, (132), 45 states have call successors, (132) [2022-04-06 16:30:33,792 INFO L276 IsEmpty]: Start isEmpty. Operand 4825 states and 5691 transitions. [2022-04-06 16:30:33,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 860 [2022-04-06 16:30:33,801 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:30:33,802 INFO L499 BasicCegarLoop]: trace histogram [133, 132, 132, 45, 44, 44, 44, 44, 44, 44, 44, 44, 44, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:30:33,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-04-06 16:30:34,015 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:30:34,015 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:30:34,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:30:34,016 INFO L85 PathProgramCache]: Analyzing trace with hash 356883745, now seen corresponding path program 87 times [2022-04-06 16:30:34,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:34,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [608443398] [2022-04-06 16:30:34,016 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:30:34,016 INFO L85 PathProgramCache]: Analyzing trace with hash 356883745, now seen corresponding path program 88 times [2022-04-06 16:30:34,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:30:34,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031057137] [2022-04-06 16:30:34,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:30:34,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:30:34,030 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:30:34,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1357463683] [2022-04-06 16:30:34,030 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:30:34,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:30:34,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:30:34,031 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:30:34,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-04-06 16:30:34,305 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:30:34,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:30:34,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 1859 conjuncts, 93 conjunts are in the unsatisfiable core [2022-04-06 16:30:34,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:30:35,815 INFO L134 CoverageAnalysis]: Checked inductivity of 41562 backedges. 264 proven. 40766 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2022-04-06 16:30:35,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:30:37,030 INFO L134 CoverageAnalysis]: Checked inductivity of 41562 backedges. 264 proven. 6710 refuted. 0 times theorem prover too weak. 34588 trivial. 0 not checked. [2022-04-06 16:30:37,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:30:37,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031057137] [2022-04-06 16:30:37,030 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:30:37,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357463683] [2022-04-06 16:30:37,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357463683] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:30:37,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:30:37,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 54 [2022-04-06 16:30:37,031 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:30:37,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [608443398] [2022-04-06 16:30:37,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [608443398] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:30:37,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:30:37,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-04-06 16:30:37,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301748025] [2022-04-06 16:30:37,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:30:37,032 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-04-06 16:30:37,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:37,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-04-06 16:30:37,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 16:30:37,033 INFO L87 Difference]: Start difference. First operand 4825 states and 5691 transitions. Second operand has 48 states, 48 states have (on average 6.666666666666667) internal successors, (320), 47 states have internal predecessors, (320), 47 states have call successors, (137), 47 states have call predecessors, (137), 45 states have return successors, (135), 45 states have call predecessors, (135), 46 states have call successors, (135) [2022-04-06 16:30:39,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:30:39,866 INFO L93 Difference]: Finished difference Result 4949 states and 5847 transitions. [2022-04-06 16:30:39,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-04-06 16:30:39,866 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 6.666666666666667) internal successors, (320), 47 states have internal predecessors, (320), 47 states have call successors, (137), 47 states have call predecessors, (137), 45 states have return successors, (135), 45 states have call predecessors, (135), 46 states have call successors, (135) Word has length 859 [2022-04-06 16:30:39,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:30:39,875 INFO L225 Difference]: With dead ends: 4949 [2022-04-06 16:30:39,875 INFO L226 Difference]: Without dead ends: 4940 [2022-04-06 16:30:39,876 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1761 GetRequests, 1664 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1044 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3663, Invalid=5843, Unknown=0, NotChecked=0, Total=9506 [2022-04-06 16:30:39,876 INFO L913 BasicCegarLoop]: 164 mSDtfsCounter, 184 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 690 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 16:30:39,876 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 690 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 836 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 16:30:39,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4940 states. [2022-04-06 16:30:41,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4940 to 4938. [2022-04-06 16:30:41,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4938 states, 3205 states have (on average 1.0976599063962558) internal successors, (3518), 3330 states have internal predecessors, (3518), 1155 states have call successors, (1155), 578 states have call predecessors, (1155), 577 states have return successors, (1152), 1029 states have call predecessors, (1152), 1152 states have call successors, (1152) [2022-04-06 16:30:41,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4938 states to 4938 states and 5825 transitions. [2022-04-06 16:30:41,416 INFO L78 Accepts]: Start accepts. Automaton has 4938 states and 5825 transitions. Word has length 859 [2022-04-06 16:30:41,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:30:41,416 INFO L478 AbstractCegarLoop]: Abstraction has 4938 states and 5825 transitions. [2022-04-06 16:30:41,416 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 6.666666666666667) internal successors, (320), 47 states have internal predecessors, (320), 47 states have call successors, (137), 47 states have call predecessors, (137), 45 states have return successors, (135), 45 states have call predecessors, (135), 46 states have call successors, (135) [2022-04-06 16:30:41,416 INFO L276 IsEmpty]: Start isEmpty. Operand 4938 states and 5825 transitions. [2022-04-06 16:30:41,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 879 [2022-04-06 16:30:41,426 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:30:41,426 INFO L499 BasicCegarLoop]: trace histogram [136, 135, 135, 46, 45, 45, 45, 45, 45, 45, 45, 45, 45, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:30:41,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-04-06 16:30:41,639 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:30:41,639 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:30:41,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:30:41,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1172676050, now seen corresponding path program 89 times [2022-04-06 16:30:41,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:41,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1970659916] [2022-04-06 16:30:41,640 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:30:41,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1172676050, now seen corresponding path program 90 times [2022-04-06 16:30:41,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:30:41,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310716632] [2022-04-06 16:30:41,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:30:41,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:30:41,653 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:30:41,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [732020853] [2022-04-06 16:30:41,653 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:30:41,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:30:41,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:30:41,654 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:30:41,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-04-06 16:31:10,445 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 86 check-sat command(s) [2022-04-06 16:31:10,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:31:10,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 1890 conjuncts, 95 conjunts are in the unsatisfiable core [2022-04-06 16:31:10,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:31:11,948 INFO L134 CoverageAnalysis]: Checked inductivity of 43474 backedges. 270 proven. 42660 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 16:31:11,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:31:12,686 INFO L134 CoverageAnalysis]: Checked inductivity of 43474 backedges. 270 proven. 7020 refuted. 0 times theorem prover too weak. 36184 trivial. 0 not checked. [2022-04-06 16:31:12,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:31:12,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310716632] [2022-04-06 16:31:12,687 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:31:12,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732020853] [2022-04-06 16:31:12,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732020853] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:31:12,687 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:31:12,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 54 [2022-04-06 16:31:12,687 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:31:12,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1970659916] [2022-04-06 16:31:12,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1970659916] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:31:12,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:31:12,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-04-06 16:31:12,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774132516] [2022-04-06 16:31:12,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:31:12,688 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-04-06 16:31:12,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:31:12,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-04-06 16:31:12,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 16:31:12,689 INFO L87 Difference]: Start difference. First operand 4938 states and 5825 transitions. Second operand has 49 states, 49 states have (on average 6.673469387755102) internal successors, (327), 48 states have internal predecessors, (327), 48 states have call successors, (140), 48 states have call predecessors, (140), 46 states have return successors, (138), 46 states have call predecessors, (138), 47 states have call successors, (138) [2022-04-06 16:31:15,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:31:15,193 INFO L93 Difference]: Finished difference Result 5062 states and 5981 transitions. [2022-04-06 16:31:15,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-04-06 16:31:15,194 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 6.673469387755102) internal successors, (327), 48 states have internal predecessors, (327), 48 states have call successors, (140), 48 states have call predecessors, (140), 46 states have return successors, (138), 46 states have call predecessors, (138), 47 states have call successors, (138) Word has length 878 [2022-04-06 16:31:15,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:31:15,202 INFO L225 Difference]: With dead ends: 5062 [2022-04-06 16:31:15,202 INFO L226 Difference]: Without dead ends: 5053 [2022-04-06 16:31:15,203 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1800 GetRequests, 1702 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1088 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3716, Invalid=5986, Unknown=0, NotChecked=0, Total=9702 [2022-04-06 16:31:15,204 INFO L913 BasicCegarLoop]: 167 mSDtfsCounter, 168 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 16:31:15,205 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 652 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 16:31:15,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5053 states. [2022-04-06 16:31:16,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5053 to 5051. [2022-04-06 16:31:16,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5051 states, 3278 states have (on average 1.097620500305064) internal successors, (3598), 3406 states have internal predecessors, (3598), 1182 states have call successors, (1182), 591 states have call predecessors, (1182), 590 states have return successors, (1179), 1053 states have call predecessors, (1179), 1179 states have call successors, (1179) [2022-04-06 16:31:16,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5051 states to 5051 states and 5959 transitions. [2022-04-06 16:31:16,793 INFO L78 Accepts]: Start accepts. Automaton has 5051 states and 5959 transitions. Word has length 878 [2022-04-06 16:31:16,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:31:16,793 INFO L478 AbstractCegarLoop]: Abstraction has 5051 states and 5959 transitions. [2022-04-06 16:31:16,794 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 6.673469387755102) internal successors, (327), 48 states have internal predecessors, (327), 48 states have call successors, (140), 48 states have call predecessors, (140), 46 states have return successors, (138), 46 states have call predecessors, (138), 47 states have call successors, (138) [2022-04-06 16:31:16,794 INFO L276 IsEmpty]: Start isEmpty. Operand 5051 states and 5959 transitions. [2022-04-06 16:31:16,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 898 [2022-04-06 16:31:16,803 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:31:16,804 INFO L499 BasicCegarLoop]: trace histogram [139, 138, 138, 47, 46, 46, 46, 46, 46, 46, 46, 46, 46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:31:16,818 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-04-06 16:31:17,011 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-04-06 16:31:17,011 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:31:17,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:31:17,012 INFO L85 PathProgramCache]: Analyzing trace with hash 942331265, now seen corresponding path program 91 times [2022-04-06 16:31:17,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:31:17,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [215143403] [2022-04-06 16:31:17,012 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:31:17,012 INFO L85 PathProgramCache]: Analyzing trace with hash 942331265, now seen corresponding path program 92 times [2022-04-06 16:31:17,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:31:17,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623381067] [2022-04-06 16:31:17,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:31:17,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:31:17,025 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:31:17,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [244432777] [2022-04-06 16:31:17,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:31:17,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:31:17,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:31:17,026 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:31:17,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-04-06 16:31:17,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:31:17,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:31:17,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 1939 conjuncts, 97 conjunts are in the unsatisfiable core [2022-04-06 16:31:17,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:31:18,579 INFO L134 CoverageAnalysis]: Checked inductivity of 45429 backedges. 276 proven. 44597 refuted. 0 times theorem prover too weak. 556 trivial. 0 not checked. [2022-04-06 16:31:18,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:31:19,482 INFO L134 CoverageAnalysis]: Checked inductivity of 45429 backedges. 276 proven. 7337 refuted. 0 times theorem prover too weak. 37816 trivial. 0 not checked. [2022-04-06 16:31:19,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:31:19,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623381067] [2022-04-06 16:31:19,483 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:31:19,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244432777] [2022-04-06 16:31:19,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244432777] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:31:19,483 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:31:19,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 54 [2022-04-06 16:31:19,483 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:31:19,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [215143403] [2022-04-06 16:31:19,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [215143403] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:31:19,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:31:19,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-04-06 16:31:19,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782379066] [2022-04-06 16:31:19,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:31:19,484 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-04-06 16:31:19,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:31:19,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-04-06 16:31:19,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 16:31:19,485 INFO L87 Difference]: Start difference. First operand 5051 states and 5959 transitions. Second operand has 50 states, 50 states have (on average 6.68) internal successors, (334), 49 states have internal predecessors, (334), 49 states have call successors, (143), 49 states have call predecessors, (143), 47 states have return successors, (141), 47 states have call predecessors, (141), 48 states have call successors, (141) [2022-04-06 16:31:22,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:31:22,306 INFO L93 Difference]: Finished difference Result 5175 states and 6115 transitions. [2022-04-06 16:31:22,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-04-06 16:31:22,306 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 6.68) internal successors, (334), 49 states have internal predecessors, (334), 49 states have call successors, (143), 49 states have call predecessors, (143), 47 states have return successors, (141), 47 states have call predecessors, (141), 48 states have call successors, (141) Word has length 897 [2022-04-06 16:31:22,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:31:22,315 INFO L225 Difference]: With dead ends: 5175 [2022-04-06 16:31:22,315 INFO L226 Difference]: Without dead ends: 5166 [2022-04-06 16:31:22,316 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1839 GetRequests, 1740 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3769, Invalid=6131, Unknown=0, NotChecked=0, Total=9900 [2022-04-06 16:31:22,317 INFO L913 BasicCegarLoop]: 170 mSDtfsCounter, 223 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 16:31:22,317 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 664 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 16:31:22,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5166 states. [2022-04-06 16:31:23,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5166 to 5164. [2022-04-06 16:31:23,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5164 states, 3351 states have (on average 1.0975828111011638) internal successors, (3678), 3482 states have internal predecessors, (3678), 1209 states have call successors, (1209), 604 states have call predecessors, (1209), 603 states have return successors, (1206), 1077 states have call predecessors, (1206), 1206 states have call successors, (1206) [2022-04-06 16:31:23,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5164 states to 5164 states and 6093 transitions. [2022-04-06 16:31:23,989 INFO L78 Accepts]: Start accepts. Automaton has 5164 states and 6093 transitions. Word has length 897 [2022-04-06 16:31:23,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:31:23,990 INFO L478 AbstractCegarLoop]: Abstraction has 5164 states and 6093 transitions. [2022-04-06 16:31:23,990 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 6.68) internal successors, (334), 49 states have internal predecessors, (334), 49 states have call successors, (143), 49 states have call predecessors, (143), 47 states have return successors, (141), 47 states have call predecessors, (141), 48 states have call successors, (141) [2022-04-06 16:31:23,990 INFO L276 IsEmpty]: Start isEmpty. Operand 5164 states and 6093 transitions. [2022-04-06 16:31:23,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 917 [2022-04-06 16:31:23,999 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:31:24,000 INFO L499 BasicCegarLoop]: trace histogram [142, 141, 141, 48, 47, 47, 47, 47, 47, 47, 47, 47, 47, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:31:24,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-04-06 16:31:24,207 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-04-06 16:31:24,208 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:31:24,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:31:24,208 INFO L85 PathProgramCache]: Analyzing trace with hash -361379470, now seen corresponding path program 93 times [2022-04-06 16:31:24,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:31:24,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2044665394] [2022-04-06 16:31:24,208 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:31:24,209 INFO L85 PathProgramCache]: Analyzing trace with hash -361379470, now seen corresponding path program 94 times [2022-04-06 16:31:24,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:31:24,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411546843] [2022-04-06 16:31:24,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:31:24,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:31:24,221 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:31:24,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [58820506] [2022-04-06 16:31:24,221 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:31:24,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:31:24,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:31:24,222 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:31:24,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-04-06 16:31:24,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:31:24,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:31:24,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 1979 conjuncts, 99 conjunts are in the unsatisfiable core [2022-04-06 16:31:24,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:31:26,214 INFO L134 CoverageAnalysis]: Checked inductivity of 47427 backedges. 282 proven. 46577 refuted. 0 times theorem prover too weak. 568 trivial. 0 not checked. [2022-04-06 16:31:26,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:31:27,157 INFO L134 CoverageAnalysis]: Checked inductivity of 47427 backedges. 282 proven. 7661 refuted. 0 times theorem prover too weak. 39484 trivial. 0 not checked. [2022-04-06 16:31:27,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:31:27,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411546843] [2022-04-06 16:31:27,158 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:31:27,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58820506] [2022-04-06 16:31:27,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58820506] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:31:27,158 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:31:27,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 54 [2022-04-06 16:31:27,158 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:31:27,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2044665394] [2022-04-06 16:31:27,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2044665394] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:31:27,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:31:27,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-04-06 16:31:27,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67215719] [2022-04-06 16:31:27,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:31:27,159 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-04-06 16:31:27,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:31:27,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-04-06 16:31:27,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 16:31:27,160 INFO L87 Difference]: Start difference. First operand 5164 states and 6093 transitions. Second operand has 51 states, 51 states have (on average 6.686274509803922) internal successors, (341), 50 states have internal predecessors, (341), 50 states have call successors, (146), 50 states have call predecessors, (146), 48 states have return successors, (144), 48 states have call predecessors, (144), 49 states have call successors, (144) [2022-04-06 16:31:29,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:31:29,839 INFO L93 Difference]: Finished difference Result 5288 states and 6249 transitions. [2022-04-06 16:31:29,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-04-06 16:31:29,840 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 6.686274509803922) internal successors, (341), 50 states have internal predecessors, (341), 50 states have call successors, (146), 50 states have call predecessors, (146), 48 states have return successors, (144), 48 states have call predecessors, (144), 49 states have call successors, (144) Word has length 916 [2022-04-06 16:31:29,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:31:29,849 INFO L225 Difference]: With dead ends: 5288 [2022-04-06 16:31:29,849 INFO L226 Difference]: Without dead ends: 5279 [2022-04-06 16:31:29,850 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1878 GetRequests, 1778 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1179 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3822, Invalid=6278, Unknown=0, NotChecked=0, Total=10100 [2022-04-06 16:31:29,850 INFO L913 BasicCegarLoop]: 173 mSDtfsCounter, 179 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 16:31:29,850 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 676 Invalid, 857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 836 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 16:31:29,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5279 states. [2022-04-06 16:31:31,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5279 to 5277. [2022-04-06 16:31:31,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5277 states, 3424 states have (on average 1.0975467289719627) internal successors, (3758), 3558 states have internal predecessors, (3758), 1236 states have call successors, (1236), 617 states have call predecessors, (1236), 616 states have return successors, (1233), 1101 states have call predecessors, (1233), 1233 states have call successors, (1233) [2022-04-06 16:31:31,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5277 states to 5277 states and 6227 transitions. [2022-04-06 16:31:31,523 INFO L78 Accepts]: Start accepts. Automaton has 5277 states and 6227 transitions. Word has length 916 [2022-04-06 16:31:31,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:31:31,524 INFO L478 AbstractCegarLoop]: Abstraction has 5277 states and 6227 transitions. [2022-04-06 16:31:31,524 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 6.686274509803922) internal successors, (341), 50 states have internal predecessors, (341), 50 states have call successors, (146), 50 states have call predecessors, (146), 48 states have return successors, (144), 48 states have call predecessors, (144), 49 states have call successors, (144) [2022-04-06 16:31:31,524 INFO L276 IsEmpty]: Start isEmpty. Operand 5277 states and 6227 transitions. [2022-04-06 16:31:31,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 936 [2022-04-06 16:31:31,535 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:31:31,535 INFO L499 BasicCegarLoop]: trace histogram [145, 144, 144, 49, 48, 48, 48, 48, 48, 48, 48, 48, 48, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:31:31,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-04-06 16:31:31,755 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:31:31,755 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:31:31,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:31:31,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1648179743, now seen corresponding path program 95 times [2022-04-06 16:31:31,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:31:31,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2023330130] [2022-04-06 16:31:31,756 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:31:31,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1648179743, now seen corresponding path program 96 times [2022-04-06 16:31:31,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:31:31,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589885457] [2022-04-06 16:31:31,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:31:31,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:31:31,770 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:31:31,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1613237988] [2022-04-06 16:31:31,770 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:31:31,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:31:31,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:31:31,771 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:31:31,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-04-06 16:31:33,271 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2022-04-06 16:31:33,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:31:33,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 2019 conjuncts, 101 conjunts are in the unsatisfiable core [2022-04-06 16:31:33,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:31:34,926 INFO L134 CoverageAnalysis]: Checked inductivity of 49468 backedges. 288 proven. 48600 refuted. 0 times theorem prover too weak. 580 trivial. 0 not checked. [2022-04-06 16:31:34,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:31:35,696 INFO L134 CoverageAnalysis]: Checked inductivity of 49468 backedges. 288 proven. 7992 refuted. 0 times theorem prover too weak. 41188 trivial. 0 not checked. [2022-04-06 16:31:35,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:31:35,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589885457] [2022-04-06 16:31:35,697 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:31:35,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613237988] [2022-04-06 16:31:35,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613237988] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:31:35,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:31:35,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 54 [2022-04-06 16:31:35,697 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:31:35,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2023330130] [2022-04-06 16:31:35,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2023330130] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:31:35,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:31:35,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-04-06 16:31:35,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232325788] [2022-04-06 16:31:35,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:31:35,698 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-04-06 16:31:35,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:31:35,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-04-06 16:31:35,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 16:31:35,699 INFO L87 Difference]: Start difference. First operand 5277 states and 6227 transitions. Second operand has 52 states, 52 states have (on average 6.6923076923076925) internal successors, (348), 51 states have internal predecessors, (348), 51 states have call successors, (149), 51 states have call predecessors, (149), 49 states have return successors, (147), 49 states have call predecessors, (147), 50 states have call successors, (147) [2022-04-06 16:31:38,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:31:38,606 INFO L93 Difference]: Finished difference Result 5401 states and 6383 transitions. [2022-04-06 16:31:38,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-04-06 16:31:38,606 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 6.6923076923076925) internal successors, (348), 51 states have internal predecessors, (348), 51 states have call successors, (149), 51 states have call predecessors, (149), 49 states have return successors, (147), 49 states have call predecessors, (147), 50 states have call successors, (147) Word has length 935 [2022-04-06 16:31:38,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:31:38,615 INFO L225 Difference]: With dead ends: 5401 [2022-04-06 16:31:38,615 INFO L226 Difference]: Without dead ends: 5392 [2022-04-06 16:31:38,616 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1917 GetRequests, 1816 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1226 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3875, Invalid=6427, Unknown=0, NotChecked=0, Total=10302 [2022-04-06 16:31:38,617 INFO L913 BasicCegarLoop]: 176 mSDtfsCounter, 166 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 16:31:38,617 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 678 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 16:31:38,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5392 states. [2022-04-06 16:31:40,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5392 to 5390. [2022-04-06 16:31:40,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5390 states, 3497 states have (on average 1.0975121532742351) internal successors, (3838), 3634 states have internal predecessors, (3838), 1263 states have call successors, (1263), 630 states have call predecessors, (1263), 629 states have return successors, (1260), 1125 states have call predecessors, (1260), 1260 states have call successors, (1260) [2022-04-06 16:31:40,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5390 states to 5390 states and 6361 transitions. [2022-04-06 16:31:40,337 INFO L78 Accepts]: Start accepts. Automaton has 5390 states and 6361 transitions. Word has length 935 [2022-04-06 16:31:40,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:31:40,338 INFO L478 AbstractCegarLoop]: Abstraction has 5390 states and 6361 transitions. [2022-04-06 16:31:40,338 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 6.6923076923076925) internal successors, (348), 51 states have internal predecessors, (348), 51 states have call successors, (149), 51 states have call predecessors, (149), 49 states have return successors, (147), 49 states have call predecessors, (147), 50 states have call successors, (147) [2022-04-06 16:31:40,338 INFO L276 IsEmpty]: Start isEmpty. Operand 5390 states and 6361 transitions. [2022-04-06 16:31:40,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 955 [2022-04-06 16:31:40,349 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:31:40,349 INFO L499 BasicCegarLoop]: trace histogram [148, 147, 147, 50, 49, 49, 49, 49, 49, 49, 49, 49, 49, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:31:40,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-04-06 16:31:40,556 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:31:40,556 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:31:40,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:31:40,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1831353618, now seen corresponding path program 97 times [2022-04-06 16:31:40,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:31:40,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1805143878] [2022-04-06 16:31:40,557 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:31:40,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1831353618, now seen corresponding path program 98 times [2022-04-06 16:31:40,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:31:40,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607557900] [2022-04-06 16:31:40,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:31:40,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:31:40,570 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:31:40,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [600624081] [2022-04-06 16:31:40,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:31:40,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:31:40,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:31:40,571 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:31:40,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-04-06 16:31:40,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:31:40,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:31:40,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 2059 conjuncts, 103 conjunts are in the unsatisfiable core [2022-04-06 16:31:40,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:31:42,537 INFO L134 CoverageAnalysis]: Checked inductivity of 51552 backedges. 294 proven. 50666 refuted. 0 times theorem prover too weak. 592 trivial. 0 not checked. [2022-04-06 16:31:42,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:31:43,342 INFO L134 CoverageAnalysis]: Checked inductivity of 51552 backedges. 294 proven. 8330 refuted. 0 times theorem prover too weak. 42928 trivial. 0 not checked. [2022-04-06 16:31:43,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:31:43,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607557900] [2022-04-06 16:31:43,342 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:31:43,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600624081] [2022-04-06 16:31:43,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600624081] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:31:43,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:31:43,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2022-04-06 16:31:43,343 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:31:43,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1805143878] [2022-04-06 16:31:43,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1805143878] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:31:43,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:31:43,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-04-06 16:31:43,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860021875] [2022-04-06 16:31:43,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:31:43,344 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-04-06 16:31:43,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:31:43,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-04-06 16:31:43,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 16:31:43,367 INFO L87 Difference]: Start difference. First operand 5390 states and 6361 transitions. Second operand has 53 states, 53 states have (on average 6.69811320754717) internal successors, (355), 52 states have internal predecessors, (355), 52 states have call successors, (152), 52 states have call predecessors, (152), 50 states have return successors, (150), 50 states have call predecessors, (150), 51 states have call successors, (150) [2022-04-06 16:31:46,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:31:46,853 INFO L93 Difference]: Finished difference Result 5514 states and 6517 transitions. [2022-04-06 16:31:46,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-04-06 16:31:46,854 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 6.69811320754717) internal successors, (355), 52 states have internal predecessors, (355), 52 states have call successors, (152), 52 states have call predecessors, (152), 50 states have return successors, (150), 50 states have call predecessors, (150), 51 states have call successors, (150) Word has length 954 [2022-04-06 16:31:46,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:31:46,863 INFO L225 Difference]: With dead ends: 5514 [2022-04-06 16:31:46,863 INFO L226 Difference]: Without dead ends: 5505 [2022-04-06 16:31:46,864 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1956 GetRequests, 1855 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3876, Invalid=6426, Unknown=0, NotChecked=0, Total=10302 [2022-04-06 16:31:46,864 INFO L913 BasicCegarLoop]: 179 mSDtfsCounter, 243 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 852 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 16:31:46,865 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 710 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 852 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 16:31:46,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5505 states. [2022-04-06 16:31:48,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5505 to 5503. [2022-04-06 16:31:48,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5503 states, 3570 states have (on average 1.0974789915966388) internal successors, (3918), 3710 states have internal predecessors, (3918), 1290 states have call successors, (1290), 643 states have call predecessors, (1290), 642 states have return successors, (1287), 1149 states have call predecessors, (1287), 1287 states have call successors, (1287) [2022-04-06 16:31:48,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5503 states to 5503 states and 6495 transitions. [2022-04-06 16:31:48,740 INFO L78 Accepts]: Start accepts. Automaton has 5503 states and 6495 transitions. Word has length 954 [2022-04-06 16:31:48,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:31:48,740 INFO L478 AbstractCegarLoop]: Abstraction has 5503 states and 6495 transitions. [2022-04-06 16:31:48,740 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 6.69811320754717) internal successors, (355), 52 states have internal predecessors, (355), 52 states have call successors, (152), 52 states have call predecessors, (152), 50 states have return successors, (150), 50 states have call predecessors, (150), 51 states have call successors, (150) [2022-04-06 16:31:48,740 INFO L276 IsEmpty]: Start isEmpty. Operand 5503 states and 6495 transitions. [2022-04-06 16:31:48,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 974 [2022-04-06 16:31:48,752 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:31:48,752 INFO L499 BasicCegarLoop]: trace histogram [151, 150, 150, 51, 50, 50, 50, 50, 50, 50, 50, 50, 50, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:31:48,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-04-06 16:31:48,971 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:31:48,972 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:31:48,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:31:48,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1648586305, now seen corresponding path program 99 times [2022-04-06 16:31:48,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:31:48,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1494024330] [2022-04-06 16:31:48,973 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:31:48,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1648586305, now seen corresponding path program 100 times [2022-04-06 16:31:48,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:31:48,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497719032] [2022-04-06 16:31:48,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:31:48,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:31:48,986 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:31:48,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1737580642] [2022-04-06 16:31:48,987 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:31:48,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:31:48,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:31:48,988 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:31:48,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-04-06 16:31:49,309 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:31:49,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-04-06 16:31:49,310 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 16:31:49,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 16:31:49,841 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 16:31:49,842 INFO L130 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found a feasible trace [2022-04-06 16:31:49,842 INFO L618 BasicCegarLoop]: Counterexample is feasible [2022-04-06 16:31:49,848 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 16:31:49,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-04-06 16:31:50,067 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:31:50,070 INFO L719 BasicCegarLoop]: Path program histogram: [100, 36, 10, 4, 2, 2, 2, 2, 2, 2, 2] [2022-04-06 16:31:50,080 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 16:31:50,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 04:31:50 BoogieIcfgContainer [2022-04-06 16:31:50,126 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 16:31:50,126 INFO L158 Benchmark]: Toolchain (without parser) took 441137.74ms. Allocated memory was 235.9MB in the beginning and 1.3GB in the end (delta: 1.1GB). Free memory was 205.6MB in the beginning and 967.8MB in the end (delta: -762.2MB). Peak memory consumption was 328.4MB. Max. memory is 8.0GB. [2022-04-06 16:31:50,126 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 235.9MB. Free memory is still 194.6MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 16:31:50,126 INFO L158 Benchmark]: CACSL2BoogieTranslator took 219.34ms. Allocated memory is still 235.9MB. Free memory was 205.4MB in the beginning and 205.5MB in the end (delta: -99.3kB). Peak memory consumption was 10.2MB. Max. memory is 8.0GB. [2022-04-06 16:31:50,126 INFO L158 Benchmark]: Boogie Preprocessor took 35.62ms. Allocated memory is still 235.9MB. Free memory was 205.5MB in the beginning and 204.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-06 16:31:50,126 INFO L158 Benchmark]: RCFGBuilder took 225.00ms. Allocated memory is still 235.9MB. Free memory was 204.0MB in the beginning and 193.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-04-06 16:31:50,126 INFO L158 Benchmark]: TraceAbstraction took 440654.64ms. Allocated memory was 235.9MB in the beginning and 1.3GB in the end (delta: 1.1GB). Free memory was 192.9MB in the beginning and 967.8MB in the end (delta: -774.9MB). Peak memory consumption was 317.2MB. Max. memory is 8.0GB. [2022-04-06 16:31:50,127 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 235.9MB. Free memory is still 194.6MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 219.34ms. Allocated memory is still 235.9MB. Free memory was 205.4MB in the beginning and 205.5MB in the end (delta: -99.3kB). Peak memory consumption was 10.2MB. Max. memory is 8.0GB. * Boogie Preprocessor took 35.62ms. Allocated memory is still 235.9MB. Free memory was 205.5MB in the beginning and 204.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 225.00ms. Allocated memory is still 235.9MB. Free memory was 204.0MB in the beginning and 193.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 440654.64ms. Allocated memory was 235.9MB in the beginning and 1.3GB in the end (delta: 1.1GB). Free memory was 192.9MB in the beginning and 967.8MB in the end (delta: -774.9MB). Peak memory consumption was 317.2MB. 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 - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; [L20] long long a, b, p, q, r, s; [L21] int x, y; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) [L8] COND FALSE !(!cond) [L24] RET assume_abort_if_not(x >= 1) [L25] CALL assume_abort_if_not(y >= 1) [L8] COND FALSE !(!cond) [L25] RET assume_abort_if_not(y >= 1) [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND FALSE !(counter++<50) [L53] CALL __VERIFIER_assert(a - b == 0) [L11] COND TRUE !(cond) [L13] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 440.6s, OverallIterations: 82, TraceHistogramMax: 151, PathProgramHistogramMax: 100, EmptinessCheckTime: 0.3s, AutomataDifference: 116.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 9 mSolverCounterUnknown, 5339 SdHoareTripleChecker+Valid, 45.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5145 mSDsluCounter, 26539 SdHoareTripleChecker+Invalid, 41.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 19813 mSDsCounter, 1542 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 29249 IncrementalHoareTripleChecker+Invalid, 30800 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1542 mSolverCounterUnsat, 6726 mSDtfsCounter, 29249 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 54372 GetRequests, 50680 SyntacticMatches, 73 SemanticMatches, 3619 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 23744 ImplicationChecksByTransitivity, 61.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=5503occurred in iteration=81, InterpolantAutomatonStates: 2937, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 44.7s AutomataMinimizationTime, 81 MinimizatonAttempts, 689 StatesRemovedByMinimization, 76 NontrivialMinimizations, HoareAnnotationStatistics: No data available, 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 RESULT: Ultimate proved your program to be incorrect! [2022-04-06 16:31:50,168 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...