/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/egcd2-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 13:42:05,063 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 13:42:05,065 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 13:42:05,083 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 13:42:05,103 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 13:42:05,103 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 13:42:05,104 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 13:42:05,105 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-20 13:42:05,113 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 13:42:05,113 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 13:42:05,113 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 13:42:05,114 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 13:42:05,114 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 13:42:05,114 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 13:42:05,114 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 13:42:05,114 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 13:42:05,114 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 13:42:05,114 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 13:42:05,114 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 13:42:05,114 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 13:42:05,115 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 13:42:05,115 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 13:42:05,115 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 13:42:05,115 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 13:42:05,115 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 13:42:05,115 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 13:42:05,115 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 13:42:05,115 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 13:42:05,115 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 13:42:05,115 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 13:42:05,115 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 13:42:05,116 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 13:42:05,116 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-20 13:42:05,116 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 13:42:05,297 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 13:42:05,321 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 13:42:05,322 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 13:42:05,323 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 13:42:05,324 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 13:42:05,325 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/egcd2-ll.c [2022-03-20 13:42:05,368 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3ad9e7b8/f232a34bcadf4c41b0726587ebeeff93/FLAG0fc1008a2 [2022-03-20 13:42:05,731 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 13:42:05,734 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/egcd2-ll.c [2022-03-20 13:42:05,739 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3ad9e7b8/f232a34bcadf4c41b0726587ebeeff93/FLAG0fc1008a2 [2022-03-20 13:42:05,751 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3ad9e7b8/f232a34bcadf4c41b0726587ebeeff93 [2022-03-20 13:42:05,753 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 13:42:05,756 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 13:42:05,757 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 13:42:05,757 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 13:42:05,760 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 13:42:05,760 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 01:42:05" (1/1) ... [2022-03-20 13:42:05,761 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@620a0c83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:42:05, skipping insertion in model container [2022-03-20 13:42:05,761 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 01:42:05" (1/1) ... [2022-03-20 13:42:05,766 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 13:42:05,781 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 13:42:05,939 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/egcd2-ll.c[490,503] [2022-03-20 13:42:05,968 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 13:42:05,974 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 13:42:05,983 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/egcd2-ll.c[490,503] [2022-03-20 13:42:06,003 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 13:42:06,015 INFO L208 MainTranslator]: Completed translation [2022-03-20 13:42:06,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:42:06 WrapperNode [2022-03-20 13:42:06,016 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 13:42:06,016 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 13:42:06,016 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 13:42:06,016 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 13:42:06,025 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:42:06" (1/1) ... [2022-03-20 13:42:06,025 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:42:06" (1/1) ... [2022-03-20 13:42:06,037 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:42:06" (1/1) ... [2022-03-20 13:42:06,038 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:42:06" (1/1) ... [2022-03-20 13:42:06,047 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:42:06" (1/1) ... [2022-03-20 13:42:06,052 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:42:06" (1/1) ... [2022-03-20 13:42:06,054 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:42:06" (1/1) ... [2022-03-20 13:42:06,055 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 13:42:06,056 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 13:42:06,056 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 13:42:06,056 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 13:42:06,057 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:42:06" (1/1) ... [2022-03-20 13:42:06,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 13:42:06,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:42:06,086 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 13:42:06,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 13:42:06,113 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 13:42:06,113 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 13:42:06,113 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 13:42:06,114 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 13:42:06,114 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 13:42:06,114 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 13:42:06,114 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 13:42:06,114 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 13:42:06,114 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 13:42:06,115 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 13:42:06,115 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 13:42:06,115 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 13:42:06,116 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 13:42:06,116 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 13:42:06,116 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 13:42:06,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 13:42:06,116 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 13:42:06,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 13:42:06,116 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 13:42:06,116 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 13:42:06,169 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 13:42:06,170 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 13:42:06,263 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 13:42:06,267 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 13:42:06,268 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 13:42:06,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 01:42:06 BoogieIcfgContainer [2022-03-20 13:42:06,269 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 13:42:06,270 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 13:42:06,270 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 13:42:06,282 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 13:42:06,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 01:42:05" (1/3) ... [2022-03-20 13:42:06,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6edab208 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 01:42:06, skipping insertion in model container [2022-03-20 13:42:06,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:42:06" (2/3) ... [2022-03-20 13:42:06,283 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6edab208 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 01:42:06, skipping insertion in model container [2022-03-20 13:42:06,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 01:42:06" (3/3) ... [2022-03-20 13:42:06,284 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll.c [2022-03-20 13:42:06,287 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 13:42:06,287 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 13:42:06,332 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 13:42:06,336 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 13:42:06,336 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 13:42:06,363 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 13:42:06,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 13:42:06,369 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:42:06,369 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:42:06,369 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:42:06,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:42:06,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1872307417, now seen corresponding path program 1 times [2022-03-20 13:42:06,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:06,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [521941182] [2022-03-20 13:42:06,395 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:42:06,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1872307417, now seen corresponding path program 2 times [2022-03-20 13:42:06,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:42:06,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148312417] [2022-03-20 13:42:06,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:42:06,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:42:06,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:42:06,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:42:06,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:42:06,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 13:42:06,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:42:06,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 13:42:06,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:42:06,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 13:42:06,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:42:06,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-20 13:42:06,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:42:06,636 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 13:42:06,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:42:06,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148312417] [2022-03-20 13:42:06,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148312417] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:42:06,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:42:06,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 13:42:06,641 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:42:06,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [521941182] [2022-03-20 13:42:06,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [521941182] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:42:06,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:42:06,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 13:42:06,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857076105] [2022-03-20 13:42:06,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:42:06,647 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 13:42:06,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:06,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 13:42:06,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 13:42:06,671 INFO L87 Difference]: Start difference. First operand has 37 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 13:42:06,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:42:06,772 INFO L93 Difference]: Finished difference Result 67 states and 106 transitions. [2022-03-20 13:42:06,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 13:42:06,774 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2022-03-20 13:42:06,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:42:06,781 INFO L225 Difference]: With dead ends: 67 [2022-03-20 13:42:06,781 INFO L226 Difference]: Without dead ends: 32 [2022-03-20 13:42:06,785 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 13:42:06,788 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:42:06,791 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 39 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:42:06,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-20 13:42:06,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-20 13:42:06,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 13:42:06,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-03-20 13:42:06,825 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 32 [2022-03-20 13:42:06,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:42:06,826 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-03-20 13:42:06,826 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 13:42:06,826 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-03-20 13:42:06,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 13:42:06,828 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:42:06,828 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:42:06,829 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 13:42:06,829 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:42:06,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:42:06,830 INFO L85 PathProgramCache]: Analyzing trace with hash 310247117, now seen corresponding path program 1 times [2022-03-20 13:42:06,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:06,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1554676407] [2022-03-20 13:42:06,832 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:42:06,833 INFO L85 PathProgramCache]: Analyzing trace with hash 310247117, now seen corresponding path program 2 times [2022-03-20 13:42:06,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:42:06,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860956427] [2022-03-20 13:42:06,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:42:06,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:42:06,863 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:42:06,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [126564583] [2022-03-20 13:42:06,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:42:06,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:42:06,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:42:06,867 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:42:06,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 13:42:06,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:42:06,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:42:06,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 13:42:06,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:42:06,999 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 13:42:06,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:42:07,103 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 13:42:07,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:42:07,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860956427] [2022-03-20 13:42:07,104 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:42:07,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126564583] [2022-03-20 13:42:07,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126564583] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:42:07,104 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:42:07,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-03-20 13:42:07,105 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:42:07,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1554676407] [2022-03-20 13:42:07,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1554676407] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:42:07,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:42:07,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 13:42:07,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266533558] [2022-03-20 13:42:07,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:42:07,106 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 13:42:07,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:07,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 13:42:07,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-20 13:42:07,106 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 13:42:07,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:42:07,168 INFO L93 Difference]: Finished difference Result 49 states and 64 transitions. [2022-03-20 13:42:07,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 13:42:07,168 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-03-20 13:42:07,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:42:07,169 INFO L225 Difference]: With dead ends: 49 [2022-03-20 13:42:07,170 INFO L226 Difference]: Without dead ends: 41 [2022-03-20 13:42:07,170 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-20 13:42:07,171 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 19 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:42:07,171 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 144 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 13:42:07,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-20 13:42:07,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2022-03-20 13:42:07,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 13:42:07,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2022-03-20 13:42:07,178 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 33 [2022-03-20 13:42:07,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:42:07,178 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2022-03-20 13:42:07,178 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 13:42:07,178 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2022-03-20 13:42:07,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 13:42:07,179 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:42:07,179 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:42:07,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 13:42:07,395 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:42:07,396 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:42:07,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:42:07,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1036600877, now seen corresponding path program 1 times [2022-03-20 13:42:07,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:07,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2027548324] [2022-03-20 13:42:07,397 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:42:07,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1036600877, now seen corresponding path program 2 times [2022-03-20 13:42:07,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:42:07,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116195886] [2022-03-20 13:42:07,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:42:07,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:42:07,408 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:42:07,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1581956560] [2022-03-20 13:42:07,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:42:07,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:42:07,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:42:07,410 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:42:07,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 13:42:07,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 13:42:07,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:42:07,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-20 13:42:07,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:42:07,521 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 13:42:07,521 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 13:42:07,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:42:07,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116195886] [2022-03-20 13:42:07,521 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:42:07,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581956560] [2022-03-20 13:42:07,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581956560] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:42:07,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:42:07,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 13:42:07,522 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:42:07,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2027548324] [2022-03-20 13:42:07,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2027548324] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:42:07,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:42:07,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 13:42:07,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78318601] [2022-03-20 13:42:07,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:42:07,523 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 13:42:07,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:07,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 13:42:07,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 13:42:07,524 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 13:42:07,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:42:07,566 INFO L93 Difference]: Finished difference Result 47 states and 60 transitions. [2022-03-20 13:42:07,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 13:42:07,566 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2022-03-20 13:42:07,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:42:07,569 INFO L225 Difference]: With dead ends: 47 [2022-03-20 13:42:07,569 INFO L226 Difference]: Without dead ends: 45 [2022-03-20 13:42:07,570 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 13:42:07,576 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:42:07,578 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 143 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 13:42:07,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-20 13:42:07,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2022-03-20 13:42:07,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 24 states have internal predecessors, (25), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 13:42:07,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2022-03-20 13:42:07,598 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 34 [2022-03-20 13:42:07,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:42:07,600 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2022-03-20 13:42:07,600 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 13:42:07,600 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2022-03-20 13:42:07,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-20 13:42:07,601 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:42:07,601 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2022-03-20 13:42:07,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 13:42:07,811 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-20 13:42:07,812 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:42:07,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:42:07,812 INFO L85 PathProgramCache]: Analyzing trace with hash -844413996, now seen corresponding path program 1 times [2022-03-20 13:42:07,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:07,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [641450523] [2022-03-20 13:42:07,813 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:42:07,813 INFO L85 PathProgramCache]: Analyzing trace with hash -844413996, now seen corresponding path program 2 times [2022-03-20 13:42:07,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:42:07,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718417217] [2022-03-20 13:42:07,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:42:07,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:42:07,820 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:42:07,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [37313060] [2022-03-20 13:42:07,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:42:07,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:42:07,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:42:07,821 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:42:07,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 13:42:07,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:42:07,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:42:07,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 13:42:07,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:42:08,003 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 13:42:08,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:42:08,082 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 13:42:08,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:42:08,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718417217] [2022-03-20 13:42:08,083 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:42:08,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37313060] [2022-03-20 13:42:08,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37313060] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 13:42:08,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 13:42:08,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-03-20 13:42:08,083 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:42:08,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [641450523] [2022-03-20 13:42:08,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [641450523] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:42:08,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:42:08,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 13:42:08,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963305589] [2022-03-20 13:42:08,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:42:08,084 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 13:42:08,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:08,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 13:42:08,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-20 13:42:08,085 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 5 states, 5 states have (on average 3.2) 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), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 13:42:08,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:42:08,112 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2022-03-20 13:42:08,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 13:42:08,113 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) 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), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2022-03-20 13:42:08,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:42:08,115 INFO L225 Difference]: With dead ends: 55 [2022-03-20 13:42:08,115 INFO L226 Difference]: Without dead ends: 53 [2022-03-20 13:42:08,115 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-20 13:42:08,116 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 7 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:42:08,116 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 153 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 13:42:08,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-20 13:42:08,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2022-03-20 13:42:08,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 13:42:08,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2022-03-20 13:42:08,124 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 39 [2022-03-20 13:42:08,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:42:08,124 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2022-03-20 13:42:08,124 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) 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), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 13:42:08,124 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2022-03-20 13:42:08,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 13:42:08,125 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:42:08,125 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 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] [2022-03-20 13:42:08,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 13:42:08,345 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:42:08,346 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:42:08,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:42:08,346 INFO L85 PathProgramCache]: Analyzing trace with hash -644493747, now seen corresponding path program 1 times [2022-03-20 13:42:08,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:08,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1690507527] [2022-03-20 13:42:08,347 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:42:08,347 INFO L85 PathProgramCache]: Analyzing trace with hash -644493747, now seen corresponding path program 2 times [2022-03-20 13:42:08,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:42:08,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900163548] [2022-03-20 13:42:08,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:42:08,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:42:08,354 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:42:08,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [283781146] [2022-03-20 13:42:08,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:42:08,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:42:08,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:42:08,355 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:42:08,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 13:42:08,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:42:08,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:42:08,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 13:42:08,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:42:08,538 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-20 13:42:08,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:42:08,631 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 13:42:08,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:42:08,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900163548] [2022-03-20 13:42:08,632 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:42:08,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283781146] [2022-03-20 13:42:08,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283781146] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 13:42:08,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 13:42:08,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-03-20 13:42:08,633 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:42:08,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1690507527] [2022-03-20 13:42:08,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1690507527] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:42:08,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:42:08,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 13:42:08,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529129689] [2022-03-20 13:42:08,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:42:08,633 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 13:42:08,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:08,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 13:42:08,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-20 13:42:08,634 INFO L87 Difference]: Start difference. First operand 52 states and 66 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 13:42:08,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:42:08,676 INFO L93 Difference]: Finished difference Result 59 states and 72 transitions. [2022-03-20 13:42:08,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 13:42:08,677 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2022-03-20 13:42:08,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:42:08,678 INFO L225 Difference]: With dead ends: 59 [2022-03-20 13:42:08,678 INFO L226 Difference]: Without dead ends: 57 [2022-03-20 13:42:08,678 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-20 13:42:08,678 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 7 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:42:08,679 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 144 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 13:42:08,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-20 13:42:08,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2022-03-20 13:42:08,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 34 states have internal predecessors, (35), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 13:42:08,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2022-03-20 13:42:08,687 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 44 [2022-03-20 13:42:08,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:42:08,687 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2022-03-20 13:42:08,687 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 13:42:08,687 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2022-03-20 13:42:08,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-20 13:42:08,688 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:42:08,688 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:42:08,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 13:42:08,903 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:42:08,904 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:42:08,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:42:08,904 INFO L85 PathProgramCache]: Analyzing trace with hash -79102156, now seen corresponding path program 1 times [2022-03-20 13:42:08,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:08,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2103109401] [2022-03-20 13:42:08,905 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:42:08,905 INFO L85 PathProgramCache]: Analyzing trace with hash -79102156, now seen corresponding path program 2 times [2022-03-20 13:42:08,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:42:08,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446610198] [2022-03-20 13:42:08,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:42:08,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:42:08,912 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:42:08,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1103605818] [2022-03-20 13:42:08,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:42:08,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:42:08,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:42:08,913 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:42:08,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 13:42:08,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:42:08,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:42:08,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 13:42:08,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:42:09,115 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-20 13:42:09,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:42:09,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:42:09,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446610198] [2022-03-20 13:42:09,205 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:42:09,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103605818] [2022-03-20 13:42:09,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103605818] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:42:09,205 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 13:42:09,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-03-20 13:42:09,205 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:42:09,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2103109401] [2022-03-20 13:42:09,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2103109401] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:42:09,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:42:09,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 13:42:09,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353175377] [2022-03-20 13:42:09,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:42:09,206 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 13:42:09,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:09,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 13:42:09,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-20 13:42:09,207 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-20 13:42:09,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:42:09,299 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2022-03-20 13:42:09,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 13:42:09,300 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 49 [2022-03-20 13:42:09,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:42:09,300 INFO L225 Difference]: With dead ends: 63 [2022-03-20 13:42:09,301 INFO L226 Difference]: Without dead ends: 61 [2022-03-20 13:42:09,301 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-03-20 13:42:09,301 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 12 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:42:09,302 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 130 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:42:09,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-03-20 13:42:09,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2022-03-20 13:42:09,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 37 states have internal predecessors, (38), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 13:42:09,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2022-03-20 13:42:09,318 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 49 [2022-03-20 13:42:09,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:42:09,319 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2022-03-20 13:42:09,319 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-20 13:42:09,319 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2022-03-20 13:42:09,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-20 13:42:09,323 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:42:09,323 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:42:09,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 13:42:09,539 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:42:09,540 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:42:09,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:42:09,540 INFO L85 PathProgramCache]: Analyzing trace with hash -2126113716, now seen corresponding path program 1 times [2022-03-20 13:42:09,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:09,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1390852442] [2022-03-20 13:42:09,541 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:42:09,541 INFO L85 PathProgramCache]: Analyzing trace with hash -2126113716, now seen corresponding path program 2 times [2022-03-20 13:42:09,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:42:09,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111235286] [2022-03-20 13:42:09,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:42:09,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:42:09,548 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:42:09,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1263732606] [2022-03-20 13:42:09,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:42:09,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:42:09,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:42:09,550 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:42:09,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 13:42:09,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:42:09,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:42:09,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 13:42:09,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:42:09,679 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-20 13:42:09,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:42:09,773 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-20 13:42:09,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:42:09,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111235286] [2022-03-20 13:42:09,774 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:42:09,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263732606] [2022-03-20 13:42:09,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263732606] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:42:09,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:42:09,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-03-20 13:42:09,774 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:42:09,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1390852442] [2022-03-20 13:42:09,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1390852442] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:42:09,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:42:09,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 13:42:09,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865758828] [2022-03-20 13:42:09,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:42:09,775 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 13:42:09,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:09,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 13:42:09,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-20 13:42:09,776 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 13:42:09,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:42:09,844 INFO L93 Difference]: Finished difference Result 88 states and 117 transitions. [2022-03-20 13:42:09,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 13:42:09,844 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2022-03-20 13:42:09,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:42:09,845 INFO L225 Difference]: With dead ends: 88 [2022-03-20 13:42:09,845 INFO L226 Difference]: Without dead ends: 86 [2022-03-20 13:42:09,845 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 13:42:09,846 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 7 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:42:09,846 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 204 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 13:42:09,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-03-20 13:42:09,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2022-03-20 13:42:09,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 41 states have (on average 1.146341463414634) internal successors, (47), 44 states have internal predecessors, (47), 26 states have call successors, (26), 9 states have call predecessors, (26), 8 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-20 13:42:09,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 97 transitions. [2022-03-20 13:42:09,856 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 97 transitions. Word has length 56 [2022-03-20 13:42:09,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:42:09,856 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 97 transitions. [2022-03-20 13:42:09,857 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 13:42:09,857 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 97 transitions. [2022-03-20 13:42:09,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-20 13:42:09,857 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:42:09,857 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:42:09,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 13:42:10,070 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:42:10,070 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:42:10,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:42:10,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1051433450, now seen corresponding path program 1 times [2022-03-20 13:42:10,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:10,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1571734030] [2022-03-20 13:42:10,071 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:42:10,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1051433450, now seen corresponding path program 2 times [2022-03-20 13:42:10,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:42:10,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637155441] [2022-03-20 13:42:10,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:42:10,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:42:10,077 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:42:10,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1480546975] [2022-03-20 13:42:10,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:42:10,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:42:10,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:42:10,079 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:42:10,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 13:42:10,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:42:10,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:42:10,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:42:10,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:42:10,214 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-20 13:42:10,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:42:10,313 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-20 13:42:10,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:42:10,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637155441] [2022-03-20 13:42:10,314 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:42:10,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480546975] [2022-03-20 13:42:10,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480546975] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:42:10,314 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:42:10,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-20 13:42:10,315 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:42:10,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1571734030] [2022-03-20 13:42:10,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1571734030] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:42:10,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:42:10,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 13:42:10,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509392012] [2022-03-20 13:42:10,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:42:10,315 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 13:42:10,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:10,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 13:42:10,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-20 13:42:10,316 INFO L87 Difference]: Start difference. First operand 76 states and 97 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-20 13:42:10,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:42:10,420 INFO L93 Difference]: Finished difference Result 121 states and 167 transitions. [2022-03-20 13:42:10,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 13:42:10,421 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 58 [2022-03-20 13:42:10,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:42:10,422 INFO L225 Difference]: With dead ends: 121 [2022-03-20 13:42:10,422 INFO L226 Difference]: Without dead ends: 113 [2022-03-20 13:42:10,422 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-20 13:42:10,423 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 30 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:42:10,423 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 316 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:42:10,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-03-20 13:42:10,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 102. [2022-03-20 13:42:10,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 58 states have internal predecessors, (64), 39 states have call successors, (39), 9 states have call predecessors, (39), 8 states have return successors, (37), 34 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-20 13:42:10,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 140 transitions. [2022-03-20 13:42:10,437 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 140 transitions. Word has length 58 [2022-03-20 13:42:10,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:42:10,437 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 140 transitions. [2022-03-20 13:42:10,437 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-20 13:42:10,437 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 140 transitions. [2022-03-20 13:42:10,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-20 13:42:10,438 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:42:10,438 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 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, 1, 1, 1, 1] [2022-03-20 13:42:10,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 13:42:10,654 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:42:10,654 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:42:10,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:42:10,655 INFO L85 PathProgramCache]: Analyzing trace with hash 998199389, now seen corresponding path program 1 times [2022-03-20 13:42:10,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:10,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [950700324] [2022-03-20 13:42:10,655 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:42:10,656 INFO L85 PathProgramCache]: Analyzing trace with hash 998199389, now seen corresponding path program 2 times [2022-03-20 13:42:10,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:42:10,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349514986] [2022-03-20 13:42:10,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:42:10,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:42:10,662 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:42:10,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1585832662] [2022-03-20 13:42:10,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:42:10,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:42:10,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:42:10,663 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:42:10,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 13:42:10,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:42:10,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:42:10,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-20 13:42:10,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:42:10,872 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 13:42:10,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:42:11,008 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 13:42:11,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:42:11,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349514986] [2022-03-20 13:42:11,008 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:42:11,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585832662] [2022-03-20 13:42:11,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585832662] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:42:11,009 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:42:11,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-03-20 13:42:11,009 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:42:11,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [950700324] [2022-03-20 13:42:11,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [950700324] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:42:11,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:42:11,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 13:42:11,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828828611] [2022-03-20 13:42:11,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:42:11,009 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 13:42:11,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:11,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 13:42:11,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-20 13:42:11,010 INFO L87 Difference]: Start difference. First operand 102 states and 140 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-03-20 13:42:11,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:42:11,142 INFO L93 Difference]: Finished difference Result 147 states and 208 transitions. [2022-03-20 13:42:11,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 13:42:11,142 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 64 [2022-03-20 13:42:11,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:42:11,146 INFO L225 Difference]: With dead ends: 147 [2022-03-20 13:42:11,146 INFO L226 Difference]: Without dead ends: 144 [2022-03-20 13:42:11,147 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-03-20 13:42:11,148 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 13 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:42:11,149 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 215 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:42:11,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-03-20 13:42:11,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 141. [2022-03-20 13:42:11,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 73 states have (on average 1.2054794520547945) internal successors, (88), 80 states have internal predecessors, (88), 58 states have call successors, (58), 10 states have call predecessors, (58), 9 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2022-03-20 13:42:11,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 201 transitions. [2022-03-20 13:42:11,175 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 201 transitions. Word has length 64 [2022-03-20 13:42:11,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:42:11,175 INFO L478 AbstractCegarLoop]: Abstraction has 141 states and 201 transitions. [2022-03-20 13:42:11,175 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-03-20 13:42:11,175 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 201 transitions. [2022-03-20 13:42:11,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-20 13:42:11,177 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:42:11,177 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 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, 1, 1, 1, 1] [2022-03-20 13:42:11,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 13:42:11,377 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-20 13:42:11,378 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:42:11,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:42:11,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1412509540, now seen corresponding path program 3 times [2022-03-20 13:42:11,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:11,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [734468836] [2022-03-20 13:42:11,379 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:42:11,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1412509540, now seen corresponding path program 4 times [2022-03-20 13:42:11,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:42:11,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719931051] [2022-03-20 13:42:11,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:42:11,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:42:11,385 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:42:11,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [690904734] [2022-03-20 13:42:11,385 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:42:11,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:42:11,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:42:11,387 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:42:11,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 13:42:11,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:42:11,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:42:11,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-20 13:42:11,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:42:11,822 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-03-20 13:42:11,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:42:12,041 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-20 13:42:12,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:42:12,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719931051] [2022-03-20 13:42:12,041 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:42:12,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690904734] [2022-03-20 13:42:12,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690904734] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:42:12,042 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:42:12,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2022-03-20 13:42:12,042 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:42:12,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [734468836] [2022-03-20 13:42:12,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [734468836] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:42:12,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:42:12,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 13:42:12,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895989759] [2022-03-20 13:42:12,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:42:12,043 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 13:42:12,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:12,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 13:42:12,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-03-20 13:42:12,044 INFO L87 Difference]: Start difference. First operand 141 states and 201 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 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) [2022-03-20 13:42:12,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:42:12,255 INFO L93 Difference]: Finished difference Result 153 states and 211 transitions. [2022-03-20 13:42:12,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 13:42:12,255 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 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 69 [2022-03-20 13:42:12,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:42:12,257 INFO L225 Difference]: With dead ends: 153 [2022-03-20 13:42:12,257 INFO L226 Difference]: Without dead ends: 151 [2022-03-20 13:42:12,257 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-03-20 13:42:12,258 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 30 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:42:12,258 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 292 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:42:12,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-03-20 13:42:12,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 149. [2022-03-20 13:42:12,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 79 states have (on average 1.1898734177215189) internal successors, (94), 86 states have internal predecessors, (94), 58 states have call successors, (58), 12 states have call predecessors, (58), 11 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2022-03-20 13:42:12,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 207 transitions. [2022-03-20 13:42:12,280 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 207 transitions. Word has length 69 [2022-03-20 13:42:12,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:42:12,280 INFO L478 AbstractCegarLoop]: Abstraction has 149 states and 207 transitions. [2022-03-20 13:42:12,280 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 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) [2022-03-20 13:42:12,281 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 207 transitions. [2022-03-20 13:42:12,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-20 13:42:12,281 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:42:12,281 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 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, 1, 1, 1, 1] [2022-03-20 13:42:12,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 13:42:12,498 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-20 13:42:12,498 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:42:12,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:42:12,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1763593091, now seen corresponding path program 5 times [2022-03-20 13:42:12,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:12,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [892080214] [2022-03-20 13:42:12,499 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:42:12,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1763593091, now seen corresponding path program 6 times [2022-03-20 13:42:12,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:42:12,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216953048] [2022-03-20 13:42:12,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:42:12,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:42:12,506 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:42:12,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1274464495] [2022-03-20 13:42:12,506 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:42:12,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:42:12,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:42:12,507 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:42:12,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 13:42:12,556 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 13:42:12,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:42:12,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-20 13:42:12,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:42:12,933 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 26 proven. 31 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-03-20 13:42:12,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:42:13,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:42:13,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216953048] [2022-03-20 13:42:13,017 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:42:13,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274464495] [2022-03-20 13:42:13,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274464495] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:42:13,017 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 13:42:13,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-20 13:42:13,017 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:42:13,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [892080214] [2022-03-20 13:42:13,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [892080214] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:42:13,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:42:13,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 13:42:13,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51443294] [2022-03-20 13:42:13,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:42:13,018 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 13:42:13,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:13,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 13:42:13,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-03-20 13:42:13,018 INFO L87 Difference]: Start difference. First operand 149 states and 207 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-20 13:42:13,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:42:13,285 INFO L93 Difference]: Finished difference Result 161 states and 217 transitions. [2022-03-20 13:42:13,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 13:42:13,287 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 74 [2022-03-20 13:42:13,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:42:13,288 INFO L225 Difference]: With dead ends: 161 [2022-03-20 13:42:13,288 INFO L226 Difference]: Without dead ends: 159 [2022-03-20 13:42:13,288 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-03-20 13:42:13,289 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 22 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:42:13,289 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 292 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:42:13,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-03-20 13:42:13,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 157. [2022-03-20 13:42:13,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 85 states have (on average 1.1764705882352942) internal successors, (100), 92 states have internal predecessors, (100), 58 states have call successors, (58), 14 states have call predecessors, (58), 13 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2022-03-20 13:42:13,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 213 transitions. [2022-03-20 13:42:13,302 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 213 transitions. Word has length 74 [2022-03-20 13:42:13,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:42:13,321 INFO L478 AbstractCegarLoop]: Abstraction has 157 states and 213 transitions. [2022-03-20 13:42:13,321 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-20 13:42:13,321 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 213 transitions. [2022-03-20 13:42:13,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-03-20 13:42:13,325 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:42:13,325 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 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, 1] [2022-03-20 13:42:13,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 13:42:13,539 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-20 13:42:13,539 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:42:13,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:42:13,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1525288661, now seen corresponding path program 3 times [2022-03-20 13:42:13,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:13,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1782143497] [2022-03-20 13:42:13,540 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:42:13,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1525288661, now seen corresponding path program 4 times [2022-03-20 13:42:13,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:42:13,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451497972] [2022-03-20 13:42:13,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:42:13,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:42:13,546 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:42:13,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [224667525] [2022-03-20 13:42:13,546 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:42:13,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:42:13,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:42:13,548 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:42:13,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 13:42:13,582 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:42:13,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:42:13,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 13:42:13,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:42:13,864 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 30 proven. 26 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-03-20 13:42:13,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:42:14,046 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 35 proven. 10 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-03-20 13:42:14,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:42:14,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451497972] [2022-03-20 13:42:14,046 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:42:14,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224667525] [2022-03-20 13:42:14,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224667525] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:42:14,047 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:42:14,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 16 [2022-03-20 13:42:14,047 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:42:14,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1782143497] [2022-03-20 13:42:14,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1782143497] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:42:14,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:42:14,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 13:42:14,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59841366] [2022-03-20 13:42:14,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:42:14,047 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 13:42:14,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:14,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 13:42:14,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-03-20 13:42:14,048 INFO L87 Difference]: Start difference. First operand 157 states and 213 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 13:42:14,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:42:14,472 INFO L93 Difference]: Finished difference Result 179 states and 242 transitions. [2022-03-20 13:42:14,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 13:42:14,472 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 78 [2022-03-20 13:42:14,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:42:14,473 INFO L225 Difference]: With dead ends: 179 [2022-03-20 13:42:14,473 INFO L226 Difference]: Without dead ends: 177 [2022-03-20 13:42:14,474 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 139 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-03-20 13:42:14,474 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 38 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:42:14,474 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 296 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 13:42:14,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-03-20 13:42:14,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 171. [2022-03-20 13:42:14,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 93 states have (on average 1.1720430107526882) internal successors, (109), 100 states have internal predecessors, (109), 62 states have call successors, (62), 16 states have call predecessors, (62), 15 states have return successors, (59), 54 states have call predecessors, (59), 59 states have call successors, (59) [2022-03-20 13:42:14,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 230 transitions. [2022-03-20 13:42:14,490 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 230 transitions. Word has length 78 [2022-03-20 13:42:14,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:42:14,491 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 230 transitions. [2022-03-20 13:42:14,491 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 13:42:14,491 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 230 transitions. [2022-03-20 13:42:14,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-20 13:42:14,491 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:42:14,491 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:42:14,511 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-03-20 13:42:14,708 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-20 13:42:14,708 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:42:14,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:42:14,708 INFO L85 PathProgramCache]: Analyzing trace with hash 815826741, now seen corresponding path program 1 times [2022-03-20 13:42:14,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:14,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1840970994] [2022-03-20 13:42:14,709 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:42:14,709 INFO L85 PathProgramCache]: Analyzing trace with hash 815826741, now seen corresponding path program 2 times [2022-03-20 13:42:14,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:42:14,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173060146] [2022-03-20 13:42:14,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:42:14,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:42:14,717 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:42:14,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [799011842] [2022-03-20 13:42:14,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:42:14,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:42:14,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:42:14,718 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:42:14,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 13:42:14,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:42:14,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:42:14,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-20 13:42:14,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:42:15,253 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 44 proven. 16 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-03-20 13:42:15,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:42:16,493 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 46 proven. 14 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-03-20 13:42:16,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:42:16,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173060146] [2022-03-20 13:42:16,494 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:42:16,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799011842] [2022-03-20 13:42:16,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799011842] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:42:16,494 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:42:16,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2022-03-20 13:42:16,494 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:42:16,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1840970994] [2022-03-20 13:42:16,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1840970994] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:42:16,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:42:16,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 13:42:16,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274386908] [2022-03-20 13:42:16,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:42:16,495 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 13:42:16,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:16,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 13:42:16,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2022-03-20 13:42:16,496 INFO L87 Difference]: Start difference. First operand 171 states and 230 transitions. Second operand has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 6 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) [2022-03-20 13:42:17,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:42:17,052 INFO L93 Difference]: Finished difference Result 196 states and 266 transitions. [2022-03-20 13:42:17,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 13:42:17,053 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 6 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 80 [2022-03-20 13:42:17,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:42:17,054 INFO L225 Difference]: With dead ends: 196 [2022-03-20 13:42:17,054 INFO L226 Difference]: Without dead ends: 193 [2022-03-20 13:42:17,054 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2022-03-20 13:42:17,055 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 27 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:42:17,055 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 339 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 13:42:17,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-03-20 13:42:17,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2022-03-20 13:42:17,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 104 states have (on average 1.1730769230769231) internal successors, (122), 112 states have internal predecessors, (122), 71 states have call successors, (71), 17 states have call predecessors, (71), 16 states have return successors, (68), 62 states have call predecessors, (68), 68 states have call successors, (68) [2022-03-20 13:42:17,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 261 transitions. [2022-03-20 13:42:17,074 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 261 transitions. Word has length 80 [2022-03-20 13:42:17,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:42:17,074 INFO L478 AbstractCegarLoop]: Abstraction has 192 states and 261 transitions. [2022-03-20 13:42:17,075 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 6 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) [2022-03-20 13:42:17,075 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 261 transitions. [2022-03-20 13:42:17,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-20 13:42:17,076 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:42:17,076 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 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, 1, 1] [2022-03-20 13:42:17,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 13:42:17,291 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 13:42:17,291 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:42:17,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:42:17,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1902002164, now seen corresponding path program 7 times [2022-03-20 13:42:17,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:17,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1112056020] [2022-03-20 13:42:17,292 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:42:17,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1902002164, now seen corresponding path program 8 times [2022-03-20 13:42:17,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:42:17,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063841393] [2022-03-20 13:42:17,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:42:17,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:42:17,298 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:42:17,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [379669833] [2022-03-20 13:42:17,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:42:17,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:42:17,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:42:17,299 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:42:17,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 13:42:17,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:42:17,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:42:17,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 13:42:17,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:42:17,444 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2022-03-20 13:42:17,444 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 13:42:17,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:42:17,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063841393] [2022-03-20 13:42:17,444 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:42:17,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379669833] [2022-03-20 13:42:17,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379669833] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:42:17,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:42:17,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 13:42:17,445 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:42:17,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1112056020] [2022-03-20 13:42:17,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1112056020] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:42:17,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:42:17,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 13:42:17,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040201609] [2022-03-20 13:42:17,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:42:17,445 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 13:42:17,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:17,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 13:42:17,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 13:42:17,446 INFO L87 Difference]: Start difference. First operand 192 states and 261 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-03-20 13:42:17,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:42:17,498 INFO L93 Difference]: Finished difference Result 234 states and 319 transitions. [2022-03-20 13:42:17,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 13:42:17,498 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 89 [2022-03-20 13:42:17,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:42:17,499 INFO L225 Difference]: With dead ends: 234 [2022-03-20 13:42:17,499 INFO L226 Difference]: Without dead ends: 175 [2022-03-20 13:42:17,500 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-20 13:42:17,500 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 6 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:42:17,500 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 168 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 13:42:17,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-03-20 13:42:17,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 166. [2022-03-20 13:42:17,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 91 states have (on average 1.10989010989011) internal successors, (101), 98 states have internal predecessors, (101), 58 states have call successors, (58), 17 states have call predecessors, (58), 16 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2022-03-20 13:42:17,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 214 transitions. [2022-03-20 13:42:17,517 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 214 transitions. Word has length 89 [2022-03-20 13:42:17,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:42:17,518 INFO L478 AbstractCegarLoop]: Abstraction has 166 states and 214 transitions. [2022-03-20 13:42:17,518 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-03-20 13:42:17,518 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 214 transitions. [2022-03-20 13:42:17,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-03-20 13:42:17,518 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:42:17,519 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 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, 1, 1, 1, 1, 1] [2022-03-20 13:42:17,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 13:42:17,731 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-20 13:42:17,731 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:42:17,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:42:17,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1738688612, now seen corresponding path program 1 times [2022-03-20 13:42:17,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:17,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1922476768] [2022-03-20 13:42:17,732 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:42:17,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1738688612, now seen corresponding path program 2 times [2022-03-20 13:42:17,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:42:17,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073539290] [2022-03-20 13:42:17,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:42:17,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:42:17,738 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:42:17,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1134053917] [2022-03-20 13:42:17,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:42:17,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:42:17,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:42:17,739 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:42:17,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 13:42:17,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:42:17,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:42:17,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-20 13:42:17,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:42:18,518 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 96 proven. 28 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2022-03-20 13:42:18,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:42:22,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:42:22,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073539290] [2022-03-20 13:42:22,525 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:42:22,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134053917] [2022-03-20 13:42:22,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134053917] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:42:22,525 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 13:42:22,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-03-20 13:42:22,526 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:42:22,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1922476768] [2022-03-20 13:42:22,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1922476768] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:42:22,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:42:22,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 13:42:22,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321959956] [2022-03-20 13:42:22,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:42:22,526 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 13:42:22,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:22,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 13:42:22,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=234, Unknown=1, NotChecked=0, Total=306 [2022-03-20 13:42:22,527 INFO L87 Difference]: Start difference. First operand 166 states and 214 transitions. Second operand has 12 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-20 13:42:23,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:42:23,239 INFO L93 Difference]: Finished difference Result 181 states and 226 transitions. [2022-03-20 13:42:23,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 13:42:23,240 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) Word has length 96 [2022-03-20 13:42:23,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:42:23,241 INFO L225 Difference]: With dead ends: 181 [2022-03-20 13:42:23,241 INFO L226 Difference]: Without dead ends: 179 [2022-03-20 13:42:23,241 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 101 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=112, Invalid=393, Unknown=1, NotChecked=0, Total=506 [2022-03-20 13:42:23,242 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 26 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 13:42:23,242 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 404 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 13:42:23,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-03-20 13:42:23,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 178. [2022-03-20 13:42:23,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 100 states have (on average 1.1) internal successors, (110), 107 states have internal predecessors, (110), 58 states have call successors, (58), 20 states have call predecessors, (58), 19 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2022-03-20 13:42:23,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 223 transitions. [2022-03-20 13:42:23,259 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 223 transitions. Word has length 96 [2022-03-20 13:42:23,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:42:23,259 INFO L478 AbstractCegarLoop]: Abstraction has 178 states and 223 transitions. [2022-03-20 13:42:23,259 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-20 13:42:23,259 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 223 transitions. [2022-03-20 13:42:23,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-03-20 13:42:23,260 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:42:23,260 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:42:23,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-20 13:42:23,475 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:42:23,475 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:42:23,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:42:23,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1265808182, now seen corresponding path program 5 times [2022-03-20 13:42:23,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:23,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1820792452] [2022-03-20 13:42:23,476 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:42:23,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1265808182, now seen corresponding path program 6 times [2022-03-20 13:42:23,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:42:23,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639099332] [2022-03-20 13:42:23,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:42:23,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:42:23,482 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:42:23,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [115742168] [2022-03-20 13:42:23,482 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:42:23,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:42:23,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:42:23,486 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:42:23,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 13:42:23,531 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-20 13:42:23,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:42:23,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 13:42:23,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:42:23,763 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-03-20 13:42:23,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:42:23,927 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-20 13:42:23,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:42:23,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639099332] [2022-03-20 13:42:23,928 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:42:23,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115742168] [2022-03-20 13:42:23,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115742168] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 13:42:23,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 13:42:23,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-03-20 13:42:23,928 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:42:23,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1820792452] [2022-03-20 13:42:23,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1820792452] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:42:23,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:42:23,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 13:42:23,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962824630] [2022-03-20 13:42:23,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:42:23,929 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 13:42:23,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:23,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 13:42:23,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-20 13:42:23,929 INFO L87 Difference]: Start difference. First operand 178 states and 223 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, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 13:42:23,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:42:23,969 INFO L93 Difference]: Finished difference Result 184 states and 228 transitions. [2022-03-20 13:42:23,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 13:42:23,970 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, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 100 [2022-03-20 13:42:23,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:42:23,971 INFO L225 Difference]: With dead ends: 184 [2022-03-20 13:42:23,971 INFO L226 Difference]: Without dead ends: 182 [2022-03-20 13:42:23,971 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 188 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-20 13:42:23,972 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:42:23,972 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 126 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 13:42:23,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-03-20 13:42:23,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2022-03-20 13:42:23,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 103 states have (on average 1.0970873786407767) internal successors, (113), 110 states have internal predecessors, (113), 58 states have call successors, (58), 21 states have call predecessors, (58), 20 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2022-03-20 13:42:23,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 226 transitions. [2022-03-20 13:42:23,991 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 226 transitions. Word has length 100 [2022-03-20 13:42:23,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:42:23,991 INFO L478 AbstractCegarLoop]: Abstraction has 182 states and 226 transitions. [2022-03-20 13:42:23,991 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, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 13:42:23,991 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 226 transitions. [2022-03-20 13:42:23,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 13:42:23,992 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:42:23,992 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:42:24,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-20 13:42:24,209 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-20 13:42:24,209 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:42:24,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:42:24,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1068463892, now seen corresponding path program 3 times [2022-03-20 13:42:24,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:24,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [138424874] [2022-03-20 13:42:24,210 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:42:24,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1068463892, now seen corresponding path program 4 times [2022-03-20 13:42:24,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:42:24,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491529288] [2022-03-20 13:42:24,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:42:24,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:42:24,216 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:42:24,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [376214699] [2022-03-20 13:42:24,216 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:42:24,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:42:24,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:42:24,217 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:42:24,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 13:42:24,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:42:24,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:42:24,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-20 13:42:24,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:42:24,659 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:42:24,988 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 55 proven. 49 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2022-03-20 13:42:24,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:42:25,283 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:42:25,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:42:25,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491529288] [2022-03-20 13:42:25,646 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:42:25,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376214699] [2022-03-20 13:42:25,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376214699] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:42:25,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 13:42:25,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-03-20 13:42:25,647 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:42:25,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [138424874] [2022-03-20 13:42:25,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [138424874] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:42:25,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:42:25,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 13:42:25,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861206571] [2022-03-20 13:42:25,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:42:25,647 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 13:42:25,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:25,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 13:42:25,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-03-20 13:42:25,648 INFO L87 Difference]: Start difference. First operand 182 states and 226 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 8 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 7 states have call successors, (17) [2022-03-20 13:42:26,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:42:26,279 INFO L93 Difference]: Finished difference Result 211 states and 269 transitions. [2022-03-20 13:42:26,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 13:42:26,280 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 8 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 7 states have call successors, (17) Word has length 102 [2022-03-20 13:42:26,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:42:26,281 INFO L225 Difference]: With dead ends: 211 [2022-03-20 13:42:26,281 INFO L226 Difference]: Without dead ends: 208 [2022-03-20 13:42:26,281 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2022-03-20 13:42:26,282 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 30 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:42:26,282 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 413 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 13:42:26,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-03-20 13:42:26,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 207. [2022-03-20 13:42:26,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 115 states have (on average 1.1043478260869566) internal successors, (127), 122 states have internal predecessors, (127), 70 states have call successors, (70), 22 states have call predecessors, (70), 21 states have return successors, (67), 62 states have call predecessors, (67), 67 states have call successors, (67) [2022-03-20 13:42:26,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 264 transitions. [2022-03-20 13:42:26,304 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 264 transitions. Word has length 102 [2022-03-20 13:42:26,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:42:26,305 INFO L478 AbstractCegarLoop]: Abstraction has 207 states and 264 transitions. [2022-03-20 13:42:26,305 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 8 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 7 states have call successors, (17) [2022-03-20 13:42:26,305 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 264 transitions. [2022-03-20 13:42:26,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-20 13:42:26,306 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:42:26,306 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1] [2022-03-20 13:42:26,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-20 13:42:26,523 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-20 13:42:26,523 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:42:26,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:42:26,524 INFO L85 PathProgramCache]: Analyzing trace with hash 351496396, now seen corresponding path program 5 times [2022-03-20 13:42:26,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:26,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [932895752] [2022-03-20 13:42:26,524 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:42:26,524 INFO L85 PathProgramCache]: Analyzing trace with hash 351496396, now seen corresponding path program 6 times [2022-03-20 13:42:26,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:42:26,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53243744] [2022-03-20 13:42:26,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:42:26,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:42:26,529 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:42:26,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1131683530] [2022-03-20 13:42:26,530 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:42:26,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:42:26,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:42:26,534 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:42:26,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 13:42:26,580 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 13:42:26,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:42:26,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 13:42:26,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:42:26,702 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-03-20 13:42:26,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:42:26,860 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-03-20 13:42:26,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:42:26,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53243744] [2022-03-20 13:42:26,860 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:42:26,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131683530] [2022-03-20 13:42:26,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131683530] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:42:26,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:42:26,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2022-03-20 13:42:26,861 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:42:26,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [932895752] [2022-03-20 13:42:26,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [932895752] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:42:26,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:42:26,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 13:42:26,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700357407] [2022-03-20 13:42:26,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:42:26,861 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 13:42:26,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:26,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 13:42:26,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-20 13:42:26,862 INFO L87 Difference]: Start difference. First operand 207 states and 264 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-03-20 13:42:27,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:42:27,061 INFO L93 Difference]: Finished difference Result 257 states and 349 transitions. [2022-03-20 13:42:27,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 13:42:27,062 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 105 [2022-03-20 13:42:27,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:42:27,063 INFO L225 Difference]: With dead ends: 257 [2022-03-20 13:42:27,063 INFO L226 Difference]: Without dead ends: 249 [2022-03-20 13:42:27,063 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 205 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-03-20 13:42:27,064 INFO L913 BasicCegarLoop]: 80 mSDtfsCounter, 14 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:42:27,064 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 329 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:42:27,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-03-20 13:42:27,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 230. [2022-03-20 13:42:27,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 123 states have (on average 1.1382113821138211) internal successors, (140), 125 states have internal predecessors, (140), 85 states have call successors, (85), 22 states have call predecessors, (85), 21 states have return successors, (82), 82 states have call predecessors, (82), 82 states have call successors, (82) [2022-03-20 13:42:27,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 307 transitions. [2022-03-20 13:42:27,104 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 307 transitions. Word has length 105 [2022-03-20 13:42:27,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:42:27,104 INFO L478 AbstractCegarLoop]: Abstraction has 230 states and 307 transitions. [2022-03-20 13:42:27,104 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-03-20 13:42:27,104 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 307 transitions. [2022-03-20 13:42:27,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-03-20 13:42:27,105 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:42:27,105 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:42:27,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-20 13:42:27,319 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-20 13:42:27,320 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:42:27,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:42:27,320 INFO L85 PathProgramCache]: Analyzing trace with hash -2080181613, now seen corresponding path program 3 times [2022-03-20 13:42:27,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:27,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1635883019] [2022-03-20 13:42:27,320 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:42:27,321 INFO L85 PathProgramCache]: Analyzing trace with hash -2080181613, now seen corresponding path program 4 times [2022-03-20 13:42:27,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:42:27,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965501506] [2022-03-20 13:42:27,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:42:27,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:42:27,326 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:42:27,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [800785178] [2022-03-20 13:42:27,326 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:42:27,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:42:27,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:42:27,351 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:42:27,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-20 13:42:27,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:42:27,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:42:27,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-20 13:42:27,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:42:29,630 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 55 proven. 50 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2022-03-20 13:42:29,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:42:30,198 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 73 proven. 7 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-03-20 13:42:30,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:42:30,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965501506] [2022-03-20 13:42:30,198 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:42:30,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800785178] [2022-03-20 13:42:30,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800785178] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:42:30,199 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:42:30,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9] total 22 [2022-03-20 13:42:30,199 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:42:30,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1635883019] [2022-03-20 13:42:30,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1635883019] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:42:30,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:42:30,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 13:42:30,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103968318] [2022-03-20 13:42:30,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:42:30,200 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 13:42:30,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:30,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 13:42:30,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2022-03-20 13:42:30,200 INFO L87 Difference]: Start difference. First operand 230 states and 307 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2022-03-20 13:42:33,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:42:33,055 INFO L93 Difference]: Finished difference Result 260 states and 350 transitions. [2022-03-20 13:42:33,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 13:42:33,056 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) Word has length 111 [2022-03-20 13:42:33,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:42:33,057 INFO L225 Difference]: With dead ends: 260 [2022-03-20 13:42:33,057 INFO L226 Difference]: Without dead ends: 258 [2022-03-20 13:42:33,057 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 200 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2022-03-20 13:42:33,058 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 42 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-20 13:42:33,058 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 510 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-20 13:42:33,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-03-20 13:42:33,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 255. [2022-03-20 13:42:33,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 135 states have (on average 1.1407407407407408) internal successors, (154), 137 states have internal predecessors, (154), 97 states have call successors, (97), 23 states have call predecessors, (97), 22 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2022-03-20 13:42:33,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 345 transitions. [2022-03-20 13:42:33,088 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 345 transitions. Word has length 111 [2022-03-20 13:42:33,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:42:33,088 INFO L478 AbstractCegarLoop]: Abstraction has 255 states and 345 transitions. [2022-03-20 13:42:33,088 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2022-03-20 13:42:33,088 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 345 transitions. [2022-03-20 13:42:33,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-20 13:42:33,089 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:42:33,089 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:42:33,106 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-03-20 13:42:33,305 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:42:33,306 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:42:33,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:42:33,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1295483154, now seen corresponding path program 5 times [2022-03-20 13:42:33,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:33,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1642944528] [2022-03-20 13:42:33,306 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:42:33,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1295483154, now seen corresponding path program 6 times [2022-03-20 13:42:33,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:42:33,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839959080] [2022-03-20 13:42:33,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:42:33,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:42:33,312 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:42:33,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [835008504] [2022-03-20 13:42:33,313 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:42:33,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:42:33,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:42:33,314 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:42:33,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-20 13:42:33,379 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 13:42:33,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:42:33,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 82 conjunts are in the unsatisfiable core [2022-03-20 13:42:33,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:42:36,124 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 129 proven. 56 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-20 13:42:36,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:44:32,861 WARN L855 $PredicateComparison]: unable to prove that (or (forall ((v_main_~yy~0_BEFORE_CALL_39 Int) (v_main_~x~0_BEFORE_CALL_151 Int) (v_main_~y~0_BEFORE_CALL_157 Int) (v_main_~s~0_BEFORE_CALL_123 Int) (v_main_~q~0_BEFORE_CALL_120 Int) (v_main_~xy~0_BEFORE_CALL_29 Int)) (let ((.cse0 (* v_main_~y~0_BEFORE_CALL_157 (+ (* v_main_~y~0_BEFORE_CALL_157 v_main_~s~0_BEFORE_CALL_123) (* v_main_~x~0_BEFORE_CALL_151 v_main_~q~0_BEFORE_CALL_120))))) (let ((.cse1 (+ .cse0 (* (- 1) v_main_~yy~0_BEFORE_CALL_39 v_main_~s~0_BEFORE_CALL_123)))) (or (not (= (+ (* (- 1) .cse0) (* v_main_~yy~0_BEFORE_CALL_39 v_main_~s~0_BEFORE_CALL_123) (* v_main_~xy~0_BEFORE_CALL_29 v_main_~q~0_BEFORE_CALL_120)) 0)) (= (mod .cse1 v_main_~q~0_BEFORE_CALL_120) 0) (= .cse1 0))))) (not (= |c___VERIFIER_assert_#in~cond| 1))) is different from true [2022-03-20 13:44:34,760 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 137 proven. 38 refuted. 5 times theorem prover too weak. 272 trivial. 1 not checked. [2022-03-20 13:44:34,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:44:34,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839959080] [2022-03-20 13:44:34,760 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:44:34,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835008504] [2022-03-20 13:44:34,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835008504] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:44:34,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:44:34,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2022-03-20 13:44:34,761 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:44:34,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1642944528] [2022-03-20 13:44:34,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1642944528] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:44:34,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:44:34,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 13:44:34,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250977032] [2022-03-20 13:44:34,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:44:34,761 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 13:44:34,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:44:34,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 13:44:34,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=642, Unknown=8, NotChecked=52, Total=812 [2022-03-20 13:44:34,762 INFO L87 Difference]: Start difference. First operand 255 states and 345 transitions. Second operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 9 states have call predecessors, (19), 8 states have call successors, (19) [2022-03-20 13:44:46,406 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 13:44:47,476 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 13:44:49,639 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 13:44:49,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:44:49,775 INFO L93 Difference]: Finished difference Result 280 states and 365 transitions. [2022-03-20 13:44:49,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 13:44:49,775 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 9 states have call predecessors, (19), 8 states have call successors, (19) Word has length 116 [2022-03-20 13:44:49,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:44:49,776 INFO L225 Difference]: With dead ends: 280 [2022-03-20 13:44:49,776 INFO L226 Difference]: Without dead ends: 278 [2022-03-20 13:44:49,777 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 202 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 28.3s TimeCoverageRelationStatistics Valid=186, Invalid=1138, Unknown=12, NotChecked=70, Total=1406 [2022-03-20 13:44:49,777 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 36 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 48 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:44:49,777 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 572 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 726 Invalid, 2 Unknown, 0 Unchecked, 6.4s Time] [2022-03-20 13:44:49,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-03-20 13:44:49,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 275. [2022-03-20 13:44:49,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 150 states have (on average 1.1266666666666667) internal successors, (169), 152 states have internal predecessors, (169), 97 states have call successors, (97), 28 states have call predecessors, (97), 27 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2022-03-20 13:44:49,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 360 transitions. [2022-03-20 13:44:49,817 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 360 transitions. Word has length 116 [2022-03-20 13:44:49,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:44:49,818 INFO L478 AbstractCegarLoop]: Abstraction has 275 states and 360 transitions. [2022-03-20 13:44:49,818 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 9 states have call predecessors, (19), 8 states have call successors, (19) [2022-03-20 13:44:49,818 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 360 transitions. [2022-03-20 13:44:49,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-03-20 13:44:49,819 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:44:49,819 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:44:49,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-20 13:44:50,035 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:44:50,036 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:44:50,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:44:50,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1515779717, now seen corresponding path program 7 times [2022-03-20 13:44:50,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:44:50,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [469683433] [2022-03-20 13:44:50,037 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:44:50,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1515779717, now seen corresponding path program 8 times [2022-03-20 13:44:50,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:44:50,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098289219] [2022-03-20 13:44:50,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:44:50,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:44:50,047 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:44:50,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1010928427] [2022-03-20 13:44:50,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:44:50,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:44:50,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:44:50,052 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:44:50,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-20 13:44:50,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:44:50,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:44:50,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 82 conjunts are in the unsatisfiable core [2022-03-20 13:44:50,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:44:51,642 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:44:52,298 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 153 proven. 83 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2022-03-20 13:44:52,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:44:53,149 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:45:10,130 WARN L232 SmtUtils]: Spent 11.95s on a formula simplification that was a NOOP. DAG size: 55 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 13:45:10,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:45:10,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098289219] [2022-03-20 13:45:10,131 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:45:10,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010928427] [2022-03-20 13:45:10,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010928427] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:45:10,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 13:45:10,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-03-20 13:45:10,131 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:45:10,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [469683433] [2022-03-20 13:45:10,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [469683433] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:45:10,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:45:10,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 13:45:10,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695068522] [2022-03-20 13:45:10,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:45:10,132 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 13:45:10,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:45:10,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 13:45:10,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2022-03-20 13:45:10,133 INFO L87 Difference]: Start difference. First operand 275 states and 360 transitions. Second operand has 18 states, 16 states have (on average 1.9375) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 9 states have call predecessors, (20), 8 states have call successors, (20) [2022-03-20 13:45:11,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:45:11,338 INFO L93 Difference]: Finished difference Result 287 states and 370 transitions. [2022-03-20 13:45:11,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 13:45:11,338 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.9375) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 9 states have call predecessors, (20), 8 states have call successors, (20) Word has length 118 [2022-03-20 13:45:11,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:45:11,340 INFO L225 Difference]: With dead ends: 287 [2022-03-20 13:45:11,340 INFO L226 Difference]: Without dead ends: 285 [2022-03-20 13:45:11,340 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 116 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=156, Invalid=774, Unknown=0, NotChecked=0, Total=930 [2022-03-20 13:45:11,341 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 44 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 13:45:11,341 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 392 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 13:45:11,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-03-20 13:45:11,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 283. [2022-03-20 13:45:11,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 156 states have (on average 1.1217948717948718) internal successors, (175), 158 states have internal predecessors, (175), 97 states have call successors, (97), 30 states have call predecessors, (97), 29 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2022-03-20 13:45:11,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 366 transitions. [2022-03-20 13:45:11,375 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 366 transitions. Word has length 118 [2022-03-20 13:45:11,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:45:11,375 INFO L478 AbstractCegarLoop]: Abstraction has 283 states and 366 transitions. [2022-03-20 13:45:11,375 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.9375) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 9 states have call predecessors, (20), 8 states have call successors, (20) [2022-03-20 13:45:11,375 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 366 transitions. [2022-03-20 13:45:11,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-03-20 13:45:11,376 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:45:11,376 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:45:11,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-20 13:45:11,593 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-03-20 13:45:11,593 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:45:11,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:45:11,593 INFO L85 PathProgramCache]: Analyzing trace with hash 2030078771, now seen corresponding path program 9 times [2022-03-20 13:45:11,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:45:11,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [173038500] [2022-03-20 13:45:11,594 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:45:11,594 INFO L85 PathProgramCache]: Analyzing trace with hash 2030078771, now seen corresponding path program 10 times [2022-03-20 13:45:11,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:45:11,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442838475] [2022-03-20 13:45:11,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:45:11,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:45:11,600 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:45:11,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [163855012] [2022-03-20 13:45:11,600 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:45:11,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:45:11,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:45:11,601 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:45:11,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-20 13:45:11,653 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:45:11,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:45:11,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 76 conjunts are in the unsatisfiable core [2022-03-20 13:45:11,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:45:12,470 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 109 proven. 111 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2022-03-20 13:45:12,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:45:16,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:45:16,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442838475] [2022-03-20 13:45:16,410 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:45:16,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163855012] [2022-03-20 13:45:16,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163855012] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:45:16,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 13:45:16,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-20 13:45:16,410 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:45:16,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [173038500] [2022-03-20 13:45:16,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [173038500] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:45:16,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:45:16,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 13:45:16,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561723668] [2022-03-20 13:45:16,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:45:16,411 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 13:45:16,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:45:16,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 13:45:16,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2022-03-20 13:45:16,412 INFO L87 Difference]: Start difference. First operand 283 states and 366 transitions. Second operand has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 10 states have call predecessors, (20), 8 states have call successors, (20) [2022-03-20 13:45:17,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:45:17,085 INFO L93 Difference]: Finished difference Result 300 states and 380 transitions. [2022-03-20 13:45:17,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 13:45:17,087 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 10 states have call predecessors, (20), 8 states have call successors, (20) Word has length 121 [2022-03-20 13:45:17,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:45:17,088 INFO L225 Difference]: With dead ends: 300 [2022-03-20 13:45:17,089 INFO L226 Difference]: Without dead ends: 298 [2022-03-20 13:45:17,089 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 124 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2022-03-20 13:45:17,089 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 31 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:45:17,089 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 514 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 13:45:17,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-03-20 13:45:17,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 295. [2022-03-20 13:45:17,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 165 states have (on average 1.1151515151515152) internal successors, (184), 167 states have internal predecessors, (184), 97 states have call successors, (97), 33 states have call predecessors, (97), 32 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2022-03-20 13:45:17,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 375 transitions. [2022-03-20 13:45:17,124 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 375 transitions. Word has length 121 [2022-03-20 13:45:17,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:45:17,124 INFO L478 AbstractCegarLoop]: Abstraction has 295 states and 375 transitions. [2022-03-20 13:45:17,125 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 10 states have call predecessors, (20), 8 states have call successors, (20) [2022-03-20 13:45:17,125 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 375 transitions. [2022-03-20 13:45:17,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-03-20 13:45:17,125 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:45:17,125 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:45:17,142 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-03-20 13:45:17,339 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-20 13:45:17,339 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:45:17,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:45:17,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1602594227, now seen corresponding path program 7 times [2022-03-20 13:45:17,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:45:17,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [339557108] [2022-03-20 13:45:17,340 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:45:17,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1602594227, now seen corresponding path program 8 times [2022-03-20 13:45:17,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:45:17,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316757373] [2022-03-20 13:45:17,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:45:17,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:45:17,345 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:45:17,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1118461200] [2022-03-20 13:45:17,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:45:17,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:45:17,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:45:17,348 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:45:17,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-20 13:45:17,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:45:17,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:45:17,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-20 13:45:17,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:45:19,037 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 67 proven. 57 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2022-03-20 13:45:19,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:45:19,954 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:45:27,269 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 67 proven. 48 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2022-03-20 13:45:27,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:45:27,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316757373] [2022-03-20 13:45:27,270 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:45:27,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118461200] [2022-03-20 13:45:27,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118461200] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:45:27,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:45:27,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 28 [2022-03-20 13:45:27,270 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:45:27,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [339557108] [2022-03-20 13:45:27,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [339557108] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:45:27,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:45:27,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 13:45:27,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589460695] [2022-03-20 13:45:27,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:45:27,271 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 13:45:27,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:45:27,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 13:45:27,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=637, Unknown=3, NotChecked=0, Total=756 [2022-03-20 13:45:27,271 INFO L87 Difference]: Start difference. First operand 295 states and 375 transitions. Second operand has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 15 states have internal predecessors, (32), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-20 13:45:28,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:45:28,988 INFO L93 Difference]: Finished difference Result 331 states and 430 transitions. [2022-03-20 13:45:28,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 13:45:28,989 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 15 states have internal predecessors, (32), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) Word has length 124 [2022-03-20 13:45:28,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:45:28,993 INFO L225 Difference]: With dead ends: 331 [2022-03-20 13:45:28,993 INFO L226 Difference]: Without dead ends: 328 [2022-03-20 13:45:28,993 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 220 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=176, Invalid=943, Unknown=3, NotChecked=0, Total=1122 [2022-03-20 13:45:28,994 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 49 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:45:28,994 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 332 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-20 13:45:28,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-03-20 13:45:29,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 326. [2022-03-20 13:45:29,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 179 states have (on average 1.1229050279329609) internal successors, (201), 181 states have internal predecessors, (201), 113 states have call successors, (113), 34 states have call predecessors, (113), 33 states have return successors, (110), 110 states have call predecessors, (110), 110 states have call successors, (110) [2022-03-20 13:45:29,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 424 transitions. [2022-03-20 13:45:29,034 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 424 transitions. Word has length 124 [2022-03-20 13:45:29,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:45:29,034 INFO L478 AbstractCegarLoop]: Abstraction has 326 states and 424 transitions. [2022-03-20 13:45:29,034 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 15 states have internal predecessors, (32), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-20 13:45:29,034 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 424 transitions. [2022-03-20 13:45:29,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-20 13:45:29,044 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:45:29,044 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:45:29,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-20 13:45:29,259 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:45:29,259 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:45:29,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:45:29,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1787495061, now seen corresponding path program 9 times [2022-03-20 13:45:29,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:45:29,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1624973903] [2022-03-20 13:45:29,261 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:45:29,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1787495061, now seen corresponding path program 10 times [2022-03-20 13:45:29,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:45:29,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109503831] [2022-03-20 13:45:29,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:45:29,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:45:29,266 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:45:29,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [407857014] [2022-03-20 13:45:29,266 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:45:29,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:45:29,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:45:29,267 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:45:29,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-20 13:45:29,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:45:29,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:45:29,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 87 conjunts are in the unsatisfiable core [2022-03-20 13:45:29,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:45:32,493 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:45:32,496 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:45:32,497 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:45:32,499 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:45:32,505 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:45:32,507 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:45:33,202 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 165 proven. 84 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-03-20 13:45:33,202 INFO L328 TraceCheckSpWp]: Computing backward predicates...