/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-18 02:42:10,489 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 02:42:10,511 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 02:42:10,533 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 02:42:10,573 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 02:42:10,574 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 02:42:10,575 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 02:42:10,575 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-18 02:42:10,583 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 02:42:10,584 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 02:42:10,584 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 02:42:10,584 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 02:42:10,585 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 02:42:10,585 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 02:42:10,585 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 02:42:10,585 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 02:42:10,585 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 02:42:10,585 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 02:42:10,586 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 02:42:10,586 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 02:42:10,586 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 02:42:10,586 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 02:42:10,586 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 02:42:10,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 02:42:10,586 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 02:42:10,586 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-18 02:42:10,586 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-18 02:42:10,586 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-18 02:42:10,586 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 02:42:10,586 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-18 02:42:10,587 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 02:42:10,776 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 02:42:10,795 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 02:42:10,797 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 02:42:10,798 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 02:42:10,799 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 02:42:10,799 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound50.c [2022-03-18 02:42:10,862 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86e789de3/87406ea686bd42078f9f805ff4b66611/FLAG9fb1c2c8f [2022-03-18 02:42:11,224 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 02:42:11,225 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound50.c [2022-03-18 02:42:11,231 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86e789de3/87406ea686bd42078f9f805ff4b66611/FLAG9fb1c2c8f [2022-03-18 02:42:11,650 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86e789de3/87406ea686bd42078f9f805ff4b66611 [2022-03-18 02:42:11,651 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 02:42:11,652 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 02:42:11,666 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 02:42:11,666 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 02:42:11,669 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 02:42:11,670 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 02:42:11" (1/1) ... [2022-03-18 02:42:11,671 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73cf379 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:42:11, skipping insertion in model container [2022-03-18 02:42:11,671 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 02:42:11" (1/1) ... [2022-03-18 02:42:11,675 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 02:42:11,686 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 02:42:11,814 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound50.c[490,503] [2022-03-18 02:42:11,848 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 02:42:11,853 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 02:42:11,896 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound50.c[490,503] [2022-03-18 02:42:11,907 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 02:42:11,918 INFO L208 MainTranslator]: Completed translation [2022-03-18 02:42:11,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:42:11 WrapperNode [2022-03-18 02:42:11,918 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 02:42:11,919 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 02:42:11,919 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 02:42:11,919 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 02:42:11,927 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:42:11" (1/1) ... [2022-03-18 02:42:11,927 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:42:11" (1/1) ... [2022-03-18 02:42:11,932 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:42:11" (1/1) ... [2022-03-18 02:42:11,932 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:42:11" (1/1) ... [2022-03-18 02:42:11,944 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:42:11" (1/1) ... [2022-03-18 02:42:11,949 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:42:11" (1/1) ... [2022-03-18 02:42:11,952 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:42:11" (1/1) ... [2022-03-18 02:42:11,953 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 02:42:11,954 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 02:42:11,954 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 02:42:11,954 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 02:42:11,955 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:42:11" (1/1) ... [2022-03-18 02:42:11,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 02:42:11,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:42:11,975 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-18 02:42:11,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-18 02:42:12,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 02:42:12,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 02:42:12,010 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 02:42:12,010 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 02:42:12,010 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 02:42:12,010 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 02:42:12,010 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 02:42:12,010 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 02:42:12,011 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 02:42:12,011 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 02:42:12,011 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 02:42:12,011 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 02:42:12,011 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 02:42:12,011 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 02:42:12,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 02:42:12,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 02:42:12,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 02:42:12,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 02:42:12,013 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 02:42:12,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 02:42:12,060 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 02:42:12,061 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 02:42:12,209 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 02:42:12,213 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 02:42:12,213 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-18 02:42:12,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 02:42:12 BoogieIcfgContainer [2022-03-18 02:42:12,228 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 02:42:12,229 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 02:42:12,229 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 02:42:12,231 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 02:42:12,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 02:42:11" (1/3) ... [2022-03-18 02:42:12,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5379c344 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 02:42:12, skipping insertion in model container [2022-03-18 02:42:12,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:42:11" (2/3) ... [2022-03-18 02:42:12,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5379c344 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 02:42:12, skipping insertion in model container [2022-03-18 02:42:12,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 02:42:12" (3/3) ... [2022-03-18 02:42:12,233 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound50.c [2022-03-18 02:42:12,236 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-18 02:42:12,236 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 02:42:12,273 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 02:42:12,277 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-18 02:42:12,278 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 02:42:12,286 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-18 02:42:12,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-18 02:42:12,292 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:42:12,292 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2022-03-18 02:42:12,293 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:42:12,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:42:12,296 INFO L85 PathProgramCache]: Analyzing trace with hash -587582002, now seen corresponding path program 1 times [2022-03-18 02:42:12,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:42:12,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1412296275] [2022-03-18 02:42:12,309 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:42:12,309 INFO L85 PathProgramCache]: Analyzing trace with hash -587582002, now seen corresponding path program 2 times [2022-03-18 02:42:12,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:42:12,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007453167] [2022-03-18 02:42:12,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:42:12,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:42:12,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 02:42:12,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 02:42:12,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 02:42:12,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 02:42:12,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 02:42:12,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 02:42:12,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 02:42:12,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-18 02:42:12,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 02:42:12,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-18 02:42:12,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 02:42:12,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-18 02:42:12,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 02:42:12,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-18 02:42:12,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 02:42:12,515 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-18 02:42:12,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:42:12,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007453167] [2022-03-18 02:42:12,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007453167] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:42:12,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:42:12,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 02:42:12,519 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:42:12,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1412296275] [2022-03-18 02:42:12,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1412296275] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:42:12,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:42:12,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 02:42:12,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391745958] [2022-03-18 02:42:12,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:42:12,524 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 02:42:12,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:42:12,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 02:42:12,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 02:42:12,550 INFO L87 Difference]: Start difference. First operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 02:42:12,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:42:12,649 INFO L93 Difference]: Finished difference Result 73 states and 118 transitions. [2022-03-18 02:42:12,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 02:42:12,651 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2022-03-18 02:42:12,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:42:12,658 INFO L225 Difference]: With dead ends: 73 [2022-03-18 02:42:12,659 INFO L226 Difference]: Without dead ends: 35 [2022-03-18 02:42:12,662 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 02:42:12,665 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:42:12,666 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 42 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:42:12,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-18 02:42:12,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-03-18 02:42:12,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-18 02:42:12,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2022-03-18 02:42:12,708 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 43 [2022-03-18 02:42:12,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:42:12,709 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2022-03-18 02:42:12,709 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 02:42:12,709 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2022-03-18 02:42:12,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-18 02:42:12,711 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:42:12,711 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2022-03-18 02:42:12,712 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 02:42:12,712 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:42:12,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:42:12,713 INFO L85 PathProgramCache]: Analyzing trace with hash 987777007, now seen corresponding path program 1 times [2022-03-18 02:42:12,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:42:12,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [959839346] [2022-03-18 02:42:12,716 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:42:12,717 INFO L85 PathProgramCache]: Analyzing trace with hash 987777007, now seen corresponding path program 2 times [2022-03-18 02:42:12,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:42:12,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77609501] [2022-03-18 02:42:12,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:42:12,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:42:12,748 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:42:12,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1094947853] [2022-03-18 02:42:12,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:42:12,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:42:12,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:42:12,751 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:42:12,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 02:42:12,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:42:12,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:42:12,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 02:42:12,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:42:12,969 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-18 02:42:12,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:42:13,074 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-18 02:42:13,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:42:13,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77609501] [2022-03-18 02:42:13,074 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:42:13,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094947853] [2022-03-18 02:42:13,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094947853] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:42:13,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:42:13,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-03-18 02:42:13,076 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:42:13,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [959839346] [2022-03-18 02:42:13,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [959839346] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:42:13,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:42:13,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 02:42:13,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605759427] [2022-03-18 02:42:13,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:42:13,077 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 02:42:13,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:42:13,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 02:42:13,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-18 02:42:13,077 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 02:42:13,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:42:13,138 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2022-03-18 02:42:13,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 02:42:13,138 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2022-03-18 02:42:13,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:42:13,139 INFO L225 Difference]: With dead ends: 52 [2022-03-18 02:42:13,139 INFO L226 Difference]: Without dead ends: 44 [2022-03-18 02:42:13,139 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-18 02:42:13,140 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 19 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:42:13,141 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 154 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:42:13,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-18 02:42:13,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-03-18 02:42:13,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-18 02:42:13,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2022-03-18 02:42:13,149 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 44 [2022-03-18 02:42:13,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:42:13,149 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2022-03-18 02:42:13,149 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 02:42:13,149 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2022-03-18 02:42:13,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-18 02:42:13,150 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:42:13,150 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2022-03-18 02:42:13,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 02:42:13,367 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:42:13,367 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:42:13,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:42:13,368 INFO L85 PathProgramCache]: Analyzing trace with hash 561616070, now seen corresponding path program 1 times [2022-03-18 02:42:13,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:42:13,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [733457694] [2022-03-18 02:42:13,368 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:42:13,368 INFO L85 PathProgramCache]: Analyzing trace with hash 561616070, now seen corresponding path program 2 times [2022-03-18 02:42:13,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:42:13,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260209536] [2022-03-18 02:42:13,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:42:13,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:42:13,378 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:42:13,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1665962218] [2022-03-18 02:42:13,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:42:13,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:42:13,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:42:13,387 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:42:13,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 02:42:13,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-18 02:42:13,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:42:13,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-18 02:42:13,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:42:13,513 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-18 02:42:13,514 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 02:42:13,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:42:13,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260209536] [2022-03-18 02:42:13,514 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:42:13,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665962218] [2022-03-18 02:42:13,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665962218] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:42:13,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:42:13,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:42:13,515 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:42:13,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [733457694] [2022-03-18 02:42:13,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [733457694] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:42:13,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:42:13,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:42:13,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631545963] [2022-03-18 02:42:13,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:42:13,516 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 02:42:13,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:42:13,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 02:42:13,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 02:42:13,517 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-18 02:42:13,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:42:13,560 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2022-03-18 02:42:13,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 02:42:13,560 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 45 [2022-03-18 02:42:13,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:42:13,562 INFO L225 Difference]: With dead ends: 50 [2022-03-18 02:42:13,562 INFO L226 Difference]: Without dead ends: 48 [2022-03-18 02:42:13,562 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 02:42:13,563 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 6 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 163 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 [2022-03-18 02:42:13,563 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 163 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:42:13,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-18 02:42:13,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2022-03-18 02:42:13,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-18 02:42:13,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2022-03-18 02:42:13,571 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 45 [2022-03-18 02:42:13,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:42:13,571 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2022-03-18 02:42:13,571 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-18 02:42:13,571 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2022-03-18 02:42:13,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-18 02:42:13,572 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:42:13,572 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2022-03-18 02:42:13,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 02:42:13,789 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-18 02:42:13,790 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:42:13,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:42:13,790 INFO L85 PathProgramCache]: Analyzing trace with hash -680064098, now seen corresponding path program 1 times [2022-03-18 02:42:13,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:42:13,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [187875893] [2022-03-18 02:42:13,791 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:42:13,791 INFO L85 PathProgramCache]: Analyzing trace with hash -680064098, now seen corresponding path program 2 times [2022-03-18 02:42:13,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:42:13,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186236781] [2022-03-18 02:42:13,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:42:13,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:42:13,805 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:42:13,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [201349606] [2022-03-18 02:42:13,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:42:13,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:42:13,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:42:13,813 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:42:13,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 02:42:13,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:42:13,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:42:13,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 02:42:13,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:42:14,008 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-18 02:42:14,008 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 02:42:14,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:42:14,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186236781] [2022-03-18 02:42:14,009 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:42:14,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201349606] [2022-03-18 02:42:14,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201349606] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:42:14,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:42:14,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:42:14,009 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:42:14,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [187875893] [2022-03-18 02:42:14,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [187875893] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:42:14,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:42:14,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:42:14,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850696206] [2022-03-18 02:42:14,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:42:14,010 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 02:42:14,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:42:14,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 02:42:14,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 02:42:14,011 INFO L87 Difference]: Start difference. First operand 43 states and 54 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, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-18 02:42:14,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:42:14,052 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2022-03-18 02:42:14,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 02:42:14,053 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, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 50 [2022-03-18 02:42:14,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:42:14,057 INFO L225 Difference]: With dead ends: 58 [2022-03-18 02:42:14,057 INFO L226 Difference]: Without dead ends: 56 [2022-03-18 02:42:14,059 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 02:42:14,061 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 7 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 173 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 [2022-03-18 02:42:14,062 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 173 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:42:14,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-18 02:42:14,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-03-18 02:42:14,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 32 states have internal predecessors, (33), 20 states have call successors, (20), 6 states have call predecessors, (20), 5 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-18 02:42:14,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 71 transitions. [2022-03-18 02:42:14,078 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 71 transitions. Word has length 50 [2022-03-18 02:42:14,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:42:14,078 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 71 transitions. [2022-03-18 02:42:14,078 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, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-18 02:42:14,079 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 71 transitions. [2022-03-18 02:42:14,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-18 02:42:14,079 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:42:14,079 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1, 1, 1, 1] [2022-03-18 02:42:14,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 02:42:14,296 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:42:14,297 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:42:14,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:42:14,297 INFO L85 PathProgramCache]: Analyzing trace with hash 606548870, now seen corresponding path program 1 times [2022-03-18 02:42:14,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:42:14,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [447919628] [2022-03-18 02:42:14,298 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:42:14,298 INFO L85 PathProgramCache]: Analyzing trace with hash 606548870, now seen corresponding path program 2 times [2022-03-18 02:42:14,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:42:14,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063016221] [2022-03-18 02:42:14,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:42:14,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:42:14,316 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:42:14,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [390323054] [2022-03-18 02:42:14,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:42:14,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:42:14,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:42:14,324 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:42:14,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 02:42:14,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:42:14,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:42:14,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 02:42:14,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:42:14,497 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-18 02:42:14,497 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 02:42:14,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:42:14,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063016221] [2022-03-18 02:42:14,497 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:42:14,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390323054] [2022-03-18 02:42:14,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390323054] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:42:14,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:42:14,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:42:14,498 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:42:14,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [447919628] [2022-03-18 02:42:14,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [447919628] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:42:14,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:42:14,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:42:14,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844264363] [2022-03-18 02:42:14,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:42:14,499 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 02:42:14,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:42:14,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 02:42:14,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 02:42:14,499 INFO L87 Difference]: Start difference. First operand 55 states and 71 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) [2022-03-18 02:42:14,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:42:14,551 INFO L93 Difference]: Finished difference Result 62 states and 77 transitions. [2022-03-18 02:42:14,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 02:42:14,552 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 55 [2022-03-18 02:42:14,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:42:14,552 INFO L225 Difference]: With dead ends: 62 [2022-03-18 02:42:14,552 INFO L226 Difference]: Without dead ends: 60 [2022-03-18 02:42:14,553 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 02:42:14,553 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 7 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:42:14,554 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 163 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:42:14,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-18 02:42:14,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-03-18 02:42:14,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 32 states have (on average 1.125) internal successors, (36), 35 states have internal predecessors, (36), 20 states have call successors, (20), 7 states have call predecessors, (20), 6 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-18 02:42:14,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2022-03-18 02:42:14,580 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 55 [2022-03-18 02:42:14,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:42:14,581 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2022-03-18 02:42:14,581 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) [2022-03-18 02:42:14,581 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2022-03-18 02:42:14,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-18 02:42:14,585 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:42:14,585 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1, 1, 1, 1] [2022-03-18 02:42:14,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-18 02:42:14,785 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:42:14,786 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:42:14,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:42:14,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1584976990, now seen corresponding path program 1 times [2022-03-18 02:42:14,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:42:14,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [358193185] [2022-03-18 02:42:14,787 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:42:14,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1584976990, now seen corresponding path program 2 times [2022-03-18 02:42:14,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:42:14,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655479255] [2022-03-18 02:42:14,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:42:14,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:42:14,796 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:42:14,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1946940231] [2022-03-18 02:42:14,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:42:14,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:42:14,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:42:14,800 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:42:14,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 02:42:14,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:42:14,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:42:14,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-18 02:42:14,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:42:15,092 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-03-18 02:42:15,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:42:15,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:42:15,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655479255] [2022-03-18 02:42:15,190 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:42:15,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946940231] [2022-03-18 02:42:15,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946940231] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 02:42:15,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 02:42:15,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-03-18 02:42:15,191 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:42:15,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [358193185] [2022-03-18 02:42:15,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [358193185] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:42:15,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:42:15,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-18 02:42:15,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279266444] [2022-03-18 02:42:15,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:42:15,192 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 02:42:15,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:42:15,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 02:42:15,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-18 02:42:15,192 INFO L87 Difference]: Start difference. First operand 59 states and 74 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-03-18 02:42:15,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:42:15,286 INFO L93 Difference]: Finished difference Result 66 states and 80 transitions. [2022-03-18 02:42:15,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 02:42:15,286 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 60 [2022-03-18 02:42:15,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:42:15,287 INFO L225 Difference]: With dead ends: 66 [2022-03-18 02:42:15,287 INFO L226 Difference]: Without dead ends: 64 [2022-03-18 02:42:15,288 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-03-18 02:42:15,288 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 11 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:42:15,288 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 181 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:42:15,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-18 02:42:15,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-03-18 02:42:15,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 38 states have internal predecessors, (39), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-18 02:42:15,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2022-03-18 02:42:15,304 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 60 [2022-03-18 02:42:15,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:42:15,304 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2022-03-18 02:42:15,304 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-03-18 02:42:15,304 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2022-03-18 02:42:15,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-18 02:42:15,305 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:42:15,305 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 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, 1, 1, 1, 1, 1] [2022-03-18 02:42:15,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 02:42:15,519 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:42:15,520 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:42:15,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:42:15,520 INFO L85 PathProgramCache]: Analyzing trace with hash -669670075, now seen corresponding path program 1 times [2022-03-18 02:42:15,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:42:15,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [988234562] [2022-03-18 02:42:15,521 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:42:15,521 INFO L85 PathProgramCache]: Analyzing trace with hash -669670075, now seen corresponding path program 2 times [2022-03-18 02:42:15,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:42:15,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822022898] [2022-03-18 02:42:15,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:42:15,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:42:15,538 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:42:15,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1407815020] [2022-03-18 02:42:15,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:42:15,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:42:15,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:42:15,540 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:42:15,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 02:42:15,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:42:15,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:42:15,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-18 02:42:15,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:42:15,704 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-18 02:42:15,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:42:15,824 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-03-18 02:42:15,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:42:15,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822022898] [2022-03-18 02:42:15,825 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:42:15,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407815020] [2022-03-18 02:42:15,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407815020] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 02:42:15,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 02:42:15,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-03-18 02:42:15,825 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:42:15,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [988234562] [2022-03-18 02:42:15,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [988234562] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:42:15,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:42:15,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:42:15,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102623260] [2022-03-18 02:42:15,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:42:15,826 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 02:42:15,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:42:15,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 02:42:15,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-18 02:42:15,827 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-03-18 02:42:15,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:42:15,861 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2022-03-18 02:42:15,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 02:42:15,862 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 67 [2022-03-18 02:42:15,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:42:15,862 INFO L225 Difference]: With dead ends: 69 [2022-03-18 02:42:15,862 INFO L226 Difference]: Without dead ends: 67 [2022-03-18 02:42:15,863 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 126 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-18 02:42:15,863 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 146 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 [2022-03-18 02:42:15,863 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 146 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:42:15,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-18 02:42:15,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2022-03-18 02:42:15,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.121212121212121) internal successors, (37), 34 states have internal predecessors, (37), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-18 02:42:15,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2022-03-18 02:42:15,870 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 67 [2022-03-18 02:42:15,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:42:15,870 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2022-03-18 02:42:15,871 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-03-18 02:42:15,871 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2022-03-18 02:42:15,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-18 02:42:15,871 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:42:15,871 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 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, 1, 1, 1, 1, 1] [2022-03-18 02:42:15,887 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-18 02:42:16,087 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:42:16,088 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:42:16,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:42:16,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1682830289, now seen corresponding path program 1 times [2022-03-18 02:42:16,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:42:16,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1850343334] [2022-03-18 02:42:16,089 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:42:16,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1682830289, now seen corresponding path program 2 times [2022-03-18 02:42:16,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:42:16,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639652458] [2022-03-18 02:42:16,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:42:16,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:42:16,097 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:42:16,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1662789475] [2022-03-18 02:42:16,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:42:16,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:42:16,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:42:16,098 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:42:16,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 02:42:16,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:42:16,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:42:16,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 02:42:16,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:42:16,254 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-03-18 02:42:16,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:42:16,391 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-03-18 02:42:16,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:42:16,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639652458] [2022-03-18 02:42:16,392 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:42:16,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662789475] [2022-03-18 02:42:16,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662789475] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:42:16,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:42:16,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-18 02:42:16,392 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:42:16,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1850343334] [2022-03-18 02:42:16,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1850343334] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:42:16,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:42:16,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 02:42:16,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150316037] [2022-03-18 02:42:16,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:42:16,393 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 02:42:16,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:42:16,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 02:42:16,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-18 02:42:16,393 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-18 02:42:16,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:42:16,517 INFO L93 Difference]: Finished difference Result 106 states and 146 transitions. [2022-03-18 02:42:16,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 02:42:16,517 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), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2022-03-18 02:42:16,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:42:16,518 INFO L225 Difference]: With dead ends: 106 [2022-03-18 02:42:16,518 INFO L226 Difference]: Without dead ends: 98 [2022-03-18 02:42:16,519 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-18 02:42:16,519 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 30 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:42:16,519 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 333 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:42:16,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-18 02:42:16,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 89. [2022-03-18 02:42:16,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 48 states have internal predecessors, (56), 34 states have call successors, (34), 8 states have call predecessors, (34), 7 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-18 02:42:16,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 122 transitions. [2022-03-18 02:42:16,531 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 122 transitions. Word has length 69 [2022-03-18 02:42:16,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:42:16,532 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 122 transitions. [2022-03-18 02:42:16,532 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), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-18 02:42:16,532 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 122 transitions. [2022-03-18 02:42:16,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-18 02:42:16,532 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:42:16,532 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 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, 1, 1, 1, 1, 1] [2022-03-18 02:42:16,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 02:42:16,749 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:42:16,749 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:42:16,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:42:16,750 INFO L85 PathProgramCache]: Analyzing trace with hash 376741854, now seen corresponding path program 1 times [2022-03-18 02:42:16,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:42:16,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [448588248] [2022-03-18 02:42:16,750 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:42:16,750 INFO L85 PathProgramCache]: Analyzing trace with hash 376741854, now seen corresponding path program 2 times [2022-03-18 02:42:16,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:42:16,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19106541] [2022-03-18 02:42:16,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:42:16,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:42:16,758 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:42:16,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [443348524] [2022-03-18 02:42:16,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:42:16,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:42:16,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:42:16,759 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:42:16,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 02:42:16,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:42:16,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:42:16,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-18 02:42:16,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:42:17,015 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-18 02:42:17,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:42:17,199 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-18 02:42:17,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:42:17,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19106541] [2022-03-18 02:42:17,200 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:42:17,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443348524] [2022-03-18 02:42:17,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443348524] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:42:17,200 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:42:17,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2022-03-18 02:42:17,201 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:42:17,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [448588248] [2022-03-18 02:42:17,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [448588248] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:42:17,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:42:17,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 02:42:17,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555670896] [2022-03-18 02:42:17,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:42:17,201 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 02:42:17,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:42:17,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 02:42:17,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-03-18 02:42:17,202 INFO L87 Difference]: Start difference. First operand 89 states and 122 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 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) [2022-03-18 02:42:17,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:42:17,340 INFO L93 Difference]: Finished difference Result 124 states and 173 transitions. [2022-03-18 02:42:17,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 02:42:17,341 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 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 75 [2022-03-18 02:42:17,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:42:17,342 INFO L225 Difference]: With dead ends: 124 [2022-03-18 02:42:17,342 INFO L226 Difference]: Without dead ends: 121 [2022-03-18 02:42:17,342 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-03-18 02:42:17,343 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 21 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:42:17,343 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 290 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:42:17,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-03-18 02:42:17,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 118. [2022-03-18 02:42:17,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 64 states have internal predecessors, (75), 47 states have call successors, (47), 9 states have call predecessors, (47), 8 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-03-18 02:42:17,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 166 transitions. [2022-03-18 02:42:17,357 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 166 transitions. Word has length 75 [2022-03-18 02:42:17,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:42:17,357 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 166 transitions. [2022-03-18 02:42:17,357 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 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) [2022-03-18 02:42:17,357 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 166 transitions. [2022-03-18 02:42:17,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-18 02:42:17,358 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:42:17,358 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1] [2022-03-18 02:42:17,375 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-03-18 02:42:17,571 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-18 02:42:17,571 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:42:17,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:42:17,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1245952186, now seen corresponding path program 3 times [2022-03-18 02:42:17,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:42:17,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1300758991] [2022-03-18 02:42:17,572 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:42:17,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1245952186, now seen corresponding path program 4 times [2022-03-18 02:42:17,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:42:17,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43319567] [2022-03-18 02:42:17,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:42:17,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:42:17,580 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:42:17,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1214426633] [2022-03-18 02:42:17,580 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:42:17,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:42:17,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:42:17,581 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:42:17,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 02:42:17,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:42:17,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:42:17,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-18 02:42:17,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:42:17,955 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-03-18 02:42:17,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:42:18,289 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-03-18 02:42:18,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:42:18,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43319567] [2022-03-18 02:42:18,290 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:42:18,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214426633] [2022-03-18 02:42:18,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214426633] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:42:18,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:42:18,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2022-03-18 02:42:18,290 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:42:18,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1300758991] [2022-03-18 02:42:18,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1300758991] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:42:18,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:42:18,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 02:42:18,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858810193] [2022-03-18 02:42:18,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:42:18,291 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 02:42:18,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:42:18,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 02:42:18,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-03-18 02:42:18,292 INFO L87 Difference]: Start difference. First operand 118 states and 166 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-18 02:42:18,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:42:18,485 INFO L93 Difference]: Finished difference Result 130 states and 176 transitions. [2022-03-18 02:42:18,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 02:42:18,485 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 80 [2022-03-18 02:42:18,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:42:18,486 INFO L225 Difference]: With dead ends: 130 [2022-03-18 02:42:18,486 INFO L226 Difference]: Without dead ends: 128 [2022-03-18 02:42:18,487 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-03-18 02:42:18,487 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 30 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:42:18,488 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 296 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:42:18,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-18 02:42:18,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2022-03-18 02:42:18,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 68 states have (on average 1.1911764705882353) internal successors, (81), 70 states have internal predecessors, (81), 47 states have call successors, (47), 11 states have call predecessors, (47), 10 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-03-18 02:42:18,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 172 transitions. [2022-03-18 02:42:18,504 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 172 transitions. Word has length 80 [2022-03-18 02:42:18,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:42:18,504 INFO L478 AbstractCegarLoop]: Abstraction has 126 states and 172 transitions. [2022-03-18 02:42:18,505 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-18 02:42:18,505 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 172 transitions. [2022-03-18 02:42:18,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-18 02:42:18,505 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:42:18,505 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 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, 1, 1] [2022-03-18 02:42:18,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-18 02:42:18,720 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-18 02:42:18,721 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:42:18,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:42:18,721 INFO L85 PathProgramCache]: Analyzing trace with hash 901388446, now seen corresponding path program 5 times [2022-03-18 02:42:18,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:42:18,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1630804550] [2022-03-18 02:42:18,722 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:42:18,722 INFO L85 PathProgramCache]: Analyzing trace with hash 901388446, now seen corresponding path program 6 times [2022-03-18 02:42:18,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:42:18,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168061991] [2022-03-18 02:42:18,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:42:18,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:42:18,743 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:42:18,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1877639705] [2022-03-18 02:42:18,743 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:42:18,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:42:18,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:42:18,744 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:42:18,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-18 02:42:18,806 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 02:42:18,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:42:18,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-18 02:42:18,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:42:19,195 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-03-18 02:42:19,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:42:19,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:42:19,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168061991] [2022-03-18 02:42:19,309 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:42:19,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877639705] [2022-03-18 02:42:19,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877639705] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 02:42:19,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 02:42:19,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-18 02:42:19,310 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:42:19,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1630804550] [2022-03-18 02:42:19,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1630804550] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:42:19,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:42:19,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 02:42:19,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278884366] [2022-03-18 02:42:19,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:42:19,310 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 02:42:19,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:42:19,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 02:42:19,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-03-18 02:42:19,311 INFO L87 Difference]: Start difference. First operand 126 states and 172 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-18 02:42:19,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:42:19,573 INFO L93 Difference]: Finished difference Result 134 states and 179 transitions. [2022-03-18 02:42:19,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 02:42:19,573 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 85 [2022-03-18 02:42:19,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:42:19,575 INFO L225 Difference]: With dead ends: 134 [2022-03-18 02:42:19,575 INFO L226 Difference]: Without dead ends: 132 [2022-03-18 02:42:19,575 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-03-18 02:42:19,575 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 24 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 02:42:19,576 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 299 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 02:42:19,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-03-18 02:42:19,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2022-03-18 02:42:19,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 71 states have (on average 1.1830985915492958) internal successors, (84), 73 states have internal predecessors, (84), 47 states have call successors, (47), 12 states have call predecessors, (47), 11 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-03-18 02:42:19,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 175 transitions. [2022-03-18 02:42:19,604 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 175 transitions. Word has length 85 [2022-03-18 02:42:19,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:42:19,605 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 175 transitions. [2022-03-18 02:42:19,605 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-18 02:42:19,605 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 175 transitions. [2022-03-18 02:42:19,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-18 02:42:19,606 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:42:19,606 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 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, 1, 1, 1, 1, 1] [2022-03-18 02:42:19,625 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-03-18 02:42:19,819 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-18 02:42:19,819 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:42:19,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:42:19,820 INFO L85 PathProgramCache]: Analyzing trace with hash -686534738, now seen corresponding path program 1 times [2022-03-18 02:42:19,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:42:19,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [157995070] [2022-03-18 02:42:19,820 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:42:19,820 INFO L85 PathProgramCache]: Analyzing trace with hash -686534738, now seen corresponding path program 2 times [2022-03-18 02:42:19,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:42:19,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431085456] [2022-03-18 02:42:19,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:42:19,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:42:19,827 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:42:19,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [469444765] [2022-03-18 02:42:19,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:42:19,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:42:19,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:42:19,833 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:42:19,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-18 02:42:19,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:42:19,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:42:19,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-18 02:42:19,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:42:20,232 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-03-18 02:42:20,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:42:20,565 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-03-18 02:42:20,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:42:20,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431085456] [2022-03-18 02:42:20,565 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:42:20,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469444765] [2022-03-18 02:42:20,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469444765] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:42:20,565 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:42:20,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-03-18 02:42:20,566 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:42:20,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [157995070] [2022-03-18 02:42:20,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [157995070] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:42:20,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:42:20,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 02:42:20,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546781705] [2022-03-18 02:42:20,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:42:20,566 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 02:42:20,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:42:20,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 02:42:20,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-03-18 02:42:20,567 INFO L87 Difference]: Start difference. First operand 130 states and 175 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-18 02:42:20,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:42:20,788 INFO L93 Difference]: Finished difference Result 157 states and 211 transitions. [2022-03-18 02:42:20,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 02:42:20,788 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 91 [2022-03-18 02:42:20,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:42:20,791 INFO L225 Difference]: With dead ends: 157 [2022-03-18 02:42:20,791 INFO L226 Difference]: Without dead ends: 154 [2022-03-18 02:42:20,792 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-03-18 02:42:20,792 INFO L912 BasicCegarLoop]: 57 mSDtfsCounter, 19 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:42:20,792 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 378 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:42:20,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-03-18 02:42:20,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2022-03-18 02:42:20,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 86 states have internal predecessors, (99), 55 states have call successors, (55), 14 states have call predecessors, (55), 13 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-03-18 02:42:20,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 206 transitions. [2022-03-18 02:42:20,810 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 206 transitions. Word has length 91 [2022-03-18 02:42:20,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:42:20,810 INFO L478 AbstractCegarLoop]: Abstraction has 153 states and 206 transitions. [2022-03-18 02:42:20,811 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-18 02:42:20,811 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 206 transitions. [2022-03-18 02:42:20,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-03-18 02:42:20,811 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:42:20,811 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 6, 6, 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, 1, 1, 1, 1, 1] [2022-03-18 02:42:20,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-18 02:42:21,028 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-18 02:42:21,028 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:42:21,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:42:21,029 INFO L85 PathProgramCache]: Analyzing trace with hash -663071842, now seen corresponding path program 7 times [2022-03-18 02:42:21,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:42:21,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1458639392] [2022-03-18 02:42:21,029 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:42:21,029 INFO L85 PathProgramCache]: Analyzing trace with hash -663071842, now seen corresponding path program 8 times [2022-03-18 02:42:21,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:42:21,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639095489] [2022-03-18 02:42:21,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:42:21,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:42:21,039 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:42:21,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [329262037] [2022-03-18 02:42:21,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:42:21,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:42:21,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:42:21,048 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:42:21,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-18 02:42:21,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:42:21,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:42:21,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 02:42:21,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:42:21,265 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2022-03-18 02:42:21,265 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 02:42:21,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:42:21,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639095489] [2022-03-18 02:42:21,265 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:42:21,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329262037] [2022-03-18 02:42:21,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329262037] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:42:21,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:42:21,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:42:21,266 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:42:21,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1458639392] [2022-03-18 02:42:21,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1458639392] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:42:21,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:42:21,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:42:21,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497186545] [2022-03-18 02:42:21,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:42:21,266 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 02:42:21,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:42:21,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 02:42:21,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 02:42:21,267 INFO L87 Difference]: Start difference. First operand 153 states and 206 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-03-18 02:42:21,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:42:21,315 INFO L93 Difference]: Finished difference Result 201 states and 280 transitions. [2022-03-18 02:42:21,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 02:42:21,315 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 100 [2022-03-18 02:42:21,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:42:21,316 INFO L225 Difference]: With dead ends: 201 [2022-03-18 02:42:21,316 INFO L226 Difference]: Without dead ends: 156 [2022-03-18 02:42:21,317 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-18 02:42:21,317 INFO L912 BasicCegarLoop]: 58 mSDtfsCounter, 6 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 188 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 [2022-03-18 02:42:21,317 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 188 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:42:21,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-03-18 02:42:21,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 147. [2022-03-18 02:42:21,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 78 states have (on average 1.1282051282051282) internal successors, (88), 80 states have internal predecessors, (88), 55 states have call successors, (55), 14 states have call predecessors, (55), 13 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-03-18 02:42:21,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 195 transitions. [2022-03-18 02:42:21,332 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 195 transitions. Word has length 100 [2022-03-18 02:42:21,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:42:21,332 INFO L478 AbstractCegarLoop]: Abstraction has 147 states and 195 transitions. [2022-03-18 02:42:21,332 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-03-18 02:42:21,332 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 195 transitions. [2022-03-18 02:42:21,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-18 02:42:21,333 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:42:21,333 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 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, 1, 1, 1, 1, 1] [2022-03-18 02:42:21,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-18 02:42:21,549 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-18 02:42:21,549 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:42:21,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:42:21,549 INFO L85 PathProgramCache]: Analyzing trace with hash -428114403, now seen corresponding path program 1 times [2022-03-18 02:42:21,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:42:21,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [436413804] [2022-03-18 02:42:21,550 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:42:21,550 INFO L85 PathProgramCache]: Analyzing trace with hash -428114403, now seen corresponding path program 2 times [2022-03-18 02:42:21,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:42:21,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991006400] [2022-03-18 02:42:21,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:42:21,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:42:21,556 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:42:21,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [997556514] [2022-03-18 02:42:21,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:42:21,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:42:21,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:42:21,558 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:42:21,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-18 02:42:21,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:42:21,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:42:21,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 66 conjunts are in the unsatisfiable core [2022-03-18 02:42:21,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:42:22,537 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 87 proven. 52 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-03-18 02:42:22,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:42:36,766 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 81 proven. 43 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-03-18 02:42:36,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:42:36,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991006400] [2022-03-18 02:42:36,766 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:42:36,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997556514] [2022-03-18 02:42:36,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997556514] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:42:36,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:42:36,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2022-03-18 02:42:36,767 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:42:36,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [436413804] [2022-03-18 02:42:36,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [436413804] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:42:36,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:42:36,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-18 02:42:36,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071691403] [2022-03-18 02:42:36,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:42:36,767 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-18 02:42:36,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:42:36,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-18 02:42:36,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2022-03-18 02:42:36,768 INFO L87 Difference]: Start difference. First operand 147 states and 195 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-18 02:42:40,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:42:40,561 INFO L93 Difference]: Finished difference Result 154 states and 201 transitions. [2022-03-18 02:42:40,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-18 02:42:40,561 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) Word has length 107 [2022-03-18 02:42:40,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:42:40,562 INFO L225 Difference]: With dead ends: 154 [2022-03-18 02:42:40,562 INFO L226 Difference]: Without dead ends: 152 [2022-03-18 02:42:40,562 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 188 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=158, Invalid=654, Unknown=0, NotChecked=0, Total=812 [2022-03-18 02:42:40,563 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 34 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-18 02:42:40,563 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 396 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-18 02:42:40,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-03-18 02:42:40,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 128. [2022-03-18 02:42:40,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 68 states have (on average 1.1323529411764706) internal successors, (77), 70 states have internal predecessors, (77), 47 states have call successors, (47), 13 states have call predecessors, (47), 12 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-03-18 02:42:40,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 168 transitions. [2022-03-18 02:42:40,577 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 168 transitions. Word has length 107 [2022-03-18 02:42:40,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:42:40,578 INFO L478 AbstractCegarLoop]: Abstraction has 128 states and 168 transitions. [2022-03-18 02:42:40,578 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-18 02:42:40,578 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 168 transitions. [2022-03-18 02:42:40,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-18 02:42:40,578 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:42:40,579 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 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, 1, 1, 1, 1, 1] [2022-03-18 02:42:40,595 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-03-18 02:42:40,791 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-18 02:42:40,791 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:42:40,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:42:40,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1185765869, now seen corresponding path program 3 times [2022-03-18 02:42:40,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:42:40,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1061274874] [2022-03-18 02:42:40,792 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:42:40,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1185765869, now seen corresponding path program 4 times [2022-03-18 02:42:40,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:42:40,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541797592] [2022-03-18 02:42:40,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:42:40,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:42:40,800 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:42:40,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [222856505] [2022-03-18 02:42:40,800 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:42:40,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:42:40,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:42:40,805 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) [2022-03-18 02:42:40,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-18 02:42:40,852 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:42:40,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:42:40,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-18 02:42:40,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:42:41,579 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 70 proven. 34 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-18 02:42:41,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:42:43,926 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 70 proven. 34 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-18 02:42:43,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:42:43,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541797592] [2022-03-18 02:42:43,926 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:42:43,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222856505] [2022-03-18 02:42:43,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222856505] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:42:43,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:42:43,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 24 [2022-03-18 02:42:43,927 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:42:43,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1061274874] [2022-03-18 02:42:43,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1061274874] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:42:43,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:42:43,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-18 02:42:43,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627055494] [2022-03-18 02:42:43,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:42:43,927 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 02:42:43,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:42:43,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 02:42:43,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2022-03-18 02:42:43,928 INFO L87 Difference]: Start difference. First operand 128 states and 168 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-18 02:42:44,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:42:44,725 INFO L93 Difference]: Finished difference Result 162 states and 215 transitions. [2022-03-18 02:42:44,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 02:42:44,726 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 113 [2022-03-18 02:42:44,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:42:44,727 INFO L225 Difference]: With dead ends: 162 [2022-03-18 02:42:44,727 INFO L226 Difference]: Without dead ends: 159 [2022-03-18 02:42:44,727 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 201 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=149, Invalid=607, Unknown=0, NotChecked=0, Total=756 [2022-03-18 02:42:44,728 INFO L912 BasicCegarLoop]: 51 mSDtfsCounter, 27 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 02:42:44,728 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 549 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 02:42:44,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-03-18 02:42:44,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 157. [2022-03-18 02:42:44,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 83 states have (on average 1.1325301204819278) internal successors, (94), 85 states have internal predecessors, (94), 59 states have call successors, (59), 15 states have call predecessors, (59), 14 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2022-03-18 02:42:44,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 209 transitions. [2022-03-18 02:42:44,752 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 209 transitions. Word has length 113 [2022-03-18 02:42:44,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:42:44,754 INFO L478 AbstractCegarLoop]: Abstraction has 157 states and 209 transitions. [2022-03-18 02:42:44,754 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-18 02:42:44,754 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 209 transitions. [2022-03-18 02:42:44,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-18 02:42:44,754 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:42:44,755 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 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, 1, 1, 1, 1, 1] [2022-03-18 02:42:44,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-18 02:42:44,959 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 [2022-03-18 02:42:44,959 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:42:44,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:42:44,960 INFO L85 PathProgramCache]: Analyzing trace with hash 884638574, now seen corresponding path program 5 times [2022-03-18 02:42:44,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:42:44,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [566184217] [2022-03-18 02:42:44,960 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:42:44,960 INFO L85 PathProgramCache]: Analyzing trace with hash 884638574, now seen corresponding path program 6 times [2022-03-18 02:42:44,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:42:44,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254840472] [2022-03-18 02:42:44,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:42:44,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:42:44,967 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:42:44,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1941998930] [2022-03-18 02:42:44,967 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:42:44,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:42:44,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:42:44,970 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) [2022-03-18 02:42:44,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-18 02:42:45,021 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 02:42:45,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:42:45,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 02:42:45,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:42:45,178 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-03-18 02:42:45,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:42:45,322 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-03-18 02:42:45,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:42:45,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254840472] [2022-03-18 02:42:45,323 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:42:45,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941998930] [2022-03-18 02:42:45,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941998930] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:42:45,323 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:42:45,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2022-03-18 02:42:45,323 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:42:45,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [566184217] [2022-03-18 02:42:45,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [566184217] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:42:45,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:42:45,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-18 02:42:45,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044593106] [2022-03-18 02:42:45,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:42:45,324 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 02:42:45,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:42:45,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 02:42:45,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-18 02:42:45,324 INFO L87 Difference]: Start difference. First operand 157 states and 209 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-03-18 02:42:45,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:42:45,471 INFO L93 Difference]: Finished difference Result 211 states and 298 transitions. [2022-03-18 02:42:45,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 02:42:45,471 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 116 [2022-03-18 02:42:45,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:42:45,473 INFO L225 Difference]: With dead ends: 211 [2022-03-18 02:42:45,473 INFO L226 Difference]: Without dead ends: 203 [2022-03-18 02:42:45,473 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 227 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-03-18 02:42:45,474 INFO L912 BasicCegarLoop]: 85 mSDtfsCounter, 14 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 359 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 [2022-03-18 02:42:45,474 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 359 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:42:45,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-03-18 02:42:45,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 184. [2022-03-18 02:42:45,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 94 states have (on average 1.1595744680851063) internal successors, (109), 96 states have internal predecessors, (109), 75 states have call successors, (75), 15 states have call predecessors, (75), 14 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2022-03-18 02:42:45,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 256 transitions. [2022-03-18 02:42:45,501 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 256 transitions. Word has length 116 [2022-03-18 02:42:45,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:42:45,501 INFO L478 AbstractCegarLoop]: Abstraction has 184 states and 256 transitions. [2022-03-18 02:42:45,501 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-03-18 02:42:45,501 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 256 transitions. [2022-03-18 02:42:45,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-03-18 02:42:45,503 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:42:45,503 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 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, 1, 1, 1, 1, 1] [2022-03-18 02:42:45,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-18 02:42:45,719 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 [2022-03-18 02:42:45,720 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:42:45,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:42:45,720 INFO L85 PathProgramCache]: Analyzing trace with hash -743412771, now seen corresponding path program 3 times [2022-03-18 02:42:45,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:42:45,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [232406922] [2022-03-18 02:42:45,721 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:42:45,721 INFO L85 PathProgramCache]: Analyzing trace with hash -743412771, now seen corresponding path program 4 times [2022-03-18 02:42:45,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:42:45,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206818134] [2022-03-18 02:42:45,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:42:45,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:42:45,727 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:42:45,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [226698874] [2022-03-18 02:42:45,727 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:42:45,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:42:45,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:42:45,735 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) [2022-03-18 02:42:45,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-18 02:42:45,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:42:45,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:42:45,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 02:42:45,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:42:45,902 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 73 proven. 7 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2022-03-18 02:42:45,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:42:46,013 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 73 proven. 7 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2022-03-18 02:42:46,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:42:46,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206818134] [2022-03-18 02:42:46,014 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:42:46,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226698874] [2022-03-18 02:42:46,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226698874] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:42:46,014 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:42:46,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-18 02:42:46,014 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:42:46,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [232406922] [2022-03-18 02:42:46,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [232406922] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:42:46,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:42:46,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 02:42:46,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978464067] [2022-03-18 02:42:46,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:42:46,015 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 02:42:46,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:42:46,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 02:42:46,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-18 02:42:46,016 INFO L87 Difference]: Start difference. First operand 184 states and 256 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-03-18 02:42:46,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:42:46,215 INFO L93 Difference]: Finished difference Result 198 states and 267 transitions. [2022-03-18 02:42:46,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 02:42:46,215 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 122 [2022-03-18 02:42:46,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:42:46,217 INFO L225 Difference]: With dead ends: 198 [2022-03-18 02:42:46,217 INFO L226 Difference]: Without dead ends: 195 [2022-03-18 02:42:46,217 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 235 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-18 02:42:46,217 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 17 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 02:42:46,217 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 182 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 02:42:46,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-03-18 02:42:46,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2022-03-18 02:42:46,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 103 states have (on average 1.145631067961165) internal successors, (118), 104 states have internal predecessors, (118), 73 states have call successors, (73), 18 states have call predecessors, (73), 17 states have return successors, (71), 71 states have call predecessors, (71), 71 states have call successors, (71) [2022-03-18 02:42:46,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 262 transitions. [2022-03-18 02:42:46,241 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 262 transitions. Word has length 122 [2022-03-18 02:42:46,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:42:46,241 INFO L478 AbstractCegarLoop]: Abstraction has 194 states and 262 transitions. [2022-03-18 02:42:46,241 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-03-18 02:42:46,241 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 262 transitions. [2022-03-18 02:42:46,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-18 02:42:46,242 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:42:46,242 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 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, 1, 1, 1, 1, 1] [2022-03-18 02:42:46,261 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-03-18 02:42:46,456 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 [2022-03-18 02:42:46,456 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:42:46,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:42:46,456 INFO L85 PathProgramCache]: Analyzing trace with hash 541794983, now seen corresponding path program 5 times [2022-03-18 02:42:46,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:42:46,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2137999077] [2022-03-18 02:42:46,457 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:42:46,457 INFO L85 PathProgramCache]: Analyzing trace with hash 541794983, now seen corresponding path program 6 times [2022-03-18 02:42:46,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:42:46,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881040034] [2022-03-18 02:42:46,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:42:46,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:42:46,463 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:42:46,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1682723467] [2022-03-18 02:42:46,463 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:42:46,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:42:46,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:42:46,475 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) [2022-03-18 02:42:46,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-18 02:42:46,542 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 02:42:46,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:42:46,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 77 conjunts are in the unsatisfiable core [2022-03-18 02:42:46,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:42:47,378 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 70 proven. 94 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2022-03-18 02:42:47,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:42:49,009 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 89 proven. 75 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2022-03-18 02:42:49,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:42:49,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881040034] [2022-03-18 02:42:49,009 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:42:49,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682723467] [2022-03-18 02:42:49,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682723467] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:42:49,010 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:42:49,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2022-03-18 02:42:49,010 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:42:49,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2137999077] [2022-03-18 02:42:49,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2137999077] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:42:49,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:42:49,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-18 02:42:49,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172761537] [2022-03-18 02:42:49,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:42:49,011 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 02:42:49,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:42:49,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 02:42:49,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2022-03-18 02:42:49,011 INFO L87 Difference]: Start difference. First operand 194 states and 262 transitions. Second operand has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 9 states have call successors, (21) [2022-03-18 02:42:49,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:42:49,636 INFO L93 Difference]: Finished difference Result 265 states and 355 transitions. [2022-03-18 02:42:49,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 02:42:49,637 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 9 states have call successors, (21) Word has length 127 [2022-03-18 02:42:49,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:42:49,641 INFO L225 Difference]: With dead ends: 265 [2022-03-18 02:42:49,641 INFO L226 Difference]: Without dead ends: 263 [2022-03-18 02:42:49,667 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 225 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=227, Invalid=895, Unknown=0, NotChecked=0, Total=1122 [2022-03-18 02:42:49,668 INFO L912 BasicCegarLoop]: 50 mSDtfsCounter, 38 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 02:42:49,668 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 585 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 02:42:49,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-03-18 02:42:49,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 260. [2022-03-18 02:42:49,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 139 states have (on average 1.1366906474820144) internal successors, (158), 140 states have internal predecessors, (158), 97 states have call successors, (97), 24 states have call predecessors, (97), 23 states have return successors, (95), 95 states have call predecessors, (95), 95 states have call successors, (95) [2022-03-18 02:42:49,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 350 transitions. [2022-03-18 02:42:49,713 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 350 transitions. Word has length 127 [2022-03-18 02:42:49,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:42:49,714 INFO L478 AbstractCegarLoop]: Abstraction has 260 states and 350 transitions. [2022-03-18 02:42:49,714 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 9 states have call successors, (21) [2022-03-18 02:42:49,714 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 350 transitions. [2022-03-18 02:42:49,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-03-18 02:42:49,717 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:42:49,717 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 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, 1, 1, 1, 1, 1] [2022-03-18 02:42:49,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-18 02:42:49,931 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 [2022-03-18 02:42:49,931 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:42:49,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:42:49,932 INFO L85 PathProgramCache]: Analyzing trace with hash -2138166692, now seen corresponding path program 7 times [2022-03-18 02:42:49,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:42:49,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1058419386] [2022-03-18 02:42:49,932 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:42:49,932 INFO L85 PathProgramCache]: Analyzing trace with hash -2138166692, now seen corresponding path program 8 times [2022-03-18 02:42:49,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:42:49,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782428888] [2022-03-18 02:42:49,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:42:49,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:42:49,939 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:42:49,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1556773917] [2022-03-18 02:42:49,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:42:49,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:42:49,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:42:49,942 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) [2022-03-18 02:42:49,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-18 02:42:50,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:42:50,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:42:50,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-18 02:42:50,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:42:50,980 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 142 proven. 88 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2022-03-18 02:42:50,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:42:53,306 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:42:54,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:42:54,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782428888] [2022-03-18 02:42:54,635 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:42:54,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556773917] [2022-03-18 02:42:54,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556773917] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 02:42:54,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 02:42:54,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-18 02:42:54,635 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:42:54,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1058419386] [2022-03-18 02:42:54,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1058419386] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:42:54,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:42:54,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-18 02:42:54,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168382772] [2022-03-18 02:42:54,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:42:54,636 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 02:42:54,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:42:54,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 02:42:54,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2022-03-18 02:42:54,637 INFO L87 Difference]: Start difference. First operand 260 states and 350 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) [2022-03-18 02:42:58,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:42:58,293 INFO L93 Difference]: Finished difference Result 268 states and 357 transitions. [2022-03-18 02:42:58,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 02:42:58,293 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) Word has length 129 [2022-03-18 02:42:58,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:42:58,295 INFO L225 Difference]: With dead ends: 268 [2022-03-18 02:42:58,295 INFO L226 Difference]: Without dead ends: 266 [2022-03-18 02:42:58,296 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 142 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=159, Invalid=652, Unknown=1, NotChecked=0, Total=812 [2022-03-18 02:42:58,296 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 34 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:42:58,296 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 394 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-18 02:42:58,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-03-18 02:42:58,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 264. [2022-03-18 02:42:58,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 142 states have (on average 1.1338028169014085) internal successors, (161), 143 states have internal predecessors, (161), 97 states have call successors, (97), 25 states have call predecessors, (97), 24 states have return successors, (95), 95 states have call predecessors, (95), 95 states have call successors, (95) [2022-03-18 02:42:58,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 353 transitions. [2022-03-18 02:42:58,335 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 353 transitions. Word has length 129 [2022-03-18 02:42:58,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:42:58,335 INFO L478 AbstractCegarLoop]: Abstraction has 264 states and 353 transitions. [2022-03-18 02:42:58,335 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) [2022-03-18 02:42:58,336 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 353 transitions. [2022-03-18 02:42:58,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-03-18 02:42:58,337 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:42:58,337 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 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, 1, 1, 1, 1, 1] [2022-03-18 02:42:58,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-18 02:42:58,554 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 [2022-03-18 02:42:58,554 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:42:58,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:42:58,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1899875875, now seen corresponding path program 9 times [2022-03-18 02:42:58,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:42:58,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1721300524] [2022-03-18 02:42:58,555 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:42:58,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1899875875, now seen corresponding path program 10 times [2022-03-18 02:42:58,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:42:58,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900133287] [2022-03-18 02:42:58,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:42:58,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:42:58,577 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:42:58,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1689907790] [2022-03-18 02:42:58,577 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:42:58,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:42:58,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:42:58,579 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) [2022-03-18 02:42:58,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-18 02:42:58,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:42:58,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:42:58,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-18 02:42:58,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:42:59,914 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 103 proven. 117 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-03-18 02:42:59,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:43:38,461 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 112 proven. 87 refuted. 3 times theorem prover too weak. 348 trivial. 0 not checked. [2022-03-18 02:43:38,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:43:38,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900133287] [2022-03-18 02:43:38,462 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:43:38,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689907790] [2022-03-18 02:43:38,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689907790] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:43:38,462 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:43:38,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 29 [2022-03-18 02:43:38,462 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:43:38,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1721300524] [2022-03-18 02:43:38,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1721300524] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:43:38,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:43:38,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-18 02:43:38,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030922234] [2022-03-18 02:43:38,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:43:38,463 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 02:43:38,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:38,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 02:43:38,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=628, Unknown=5, NotChecked=0, Total=812 [2022-03-18 02:43:38,463 INFO L87 Difference]: Start difference. First operand 264 states and 353 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2022-03-18 02:43:43,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:43:43,156 INFO L93 Difference]: Finished difference Result 277 states and 364 transitions. [2022-03-18 02:43:43,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 02:43:43,156 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) Word has length 132 [2022-03-18 02:43:43,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:43:43,157 INFO L225 Difference]: With dead ends: 277 [2022-03-18 02:43:43,157 INFO L226 Difference]: Without dead ends: 275 [2022-03-18 02:43:43,158 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 232 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 26.2s TimeCoverageRelationStatistics Valid=258, Invalid=926, Unknown=6, NotChecked=0, Total=1190 [2022-03-18 02:43:43,158 INFO L912 BasicCegarLoop]: 50 mSDtfsCounter, 31 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 02:43:43,158 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 467 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 02:43:43,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-03-18 02:43:43,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 239. [2022-03-18 02:43:43,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 130 states have (on average 1.1307692307692307) internal successors, (147), 131 states have internal predecessors, (147), 85 states have call successors, (85), 24 states have call predecessors, (85), 23 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2022-03-18 02:43:43,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 315 transitions. [2022-03-18 02:43:43,203 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 315 transitions. Word has length 132 [2022-03-18 02:43:43,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:43:43,203 INFO L478 AbstractCegarLoop]: Abstraction has 239 states and 315 transitions. [2022-03-18 02:43:43,204 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2022-03-18 02:43:43,204 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 315 transitions. [2022-03-18 02:43:43,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-18 02:43:43,204 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:43:43,205 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 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, 1, 1, 1, 1, 1] [2022-03-18 02:43:43,221 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-03-18 02:43:43,419 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 [2022-03-18 02:43:43,419 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:43:43,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:43:43,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1068997356, now seen corresponding path program 7 times [2022-03-18 02:43:43,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:43,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1135632805] [2022-03-18 02:43:43,420 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:43:43,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1068997356, now seen corresponding path program 8 times [2022-03-18 02:43:43,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:43:43,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79338409] [2022-03-18 02:43:43,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:43:43,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:43:43,426 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:43:43,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [811274258] [2022-03-18 02:43:43,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:43:43,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:43:43,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:43:43,436 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) [2022-03-18 02:43:43,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-18 02:43:43,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:43:43,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:43:43,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-18 02:43:43,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:43:44,266 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 102 proven. 52 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2022-03-18 02:43:44,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:43:46,412 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 102 proven. 52 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2022-03-18 02:43:46,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:43:46,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79338409] [2022-03-18 02:43:46,412 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:43:46,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811274258] [2022-03-18 02:43:46,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811274258] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:43:46,412 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:43:46,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 26 [2022-03-18 02:43:46,412 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:43:46,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1135632805] [2022-03-18 02:43:46,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1135632805] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:43:46,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:43:46,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-18 02:43:46,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849843667] [2022-03-18 02:43:46,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:43:46,413 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-18 02:43:46,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:46,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-18 02:43:46,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2022-03-18 02:43:46,414 INFO L87 Difference]: Start difference. First operand 239 states and 315 transitions. Second operand has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2022-03-18 02:43:47,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:43:47,226 INFO L93 Difference]: Finished difference Result 284 states and 377 transitions. [2022-03-18 02:43:47,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-18 02:43:47,227 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) Word has length 135 [2022-03-18 02:43:47,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:43:47,228 INFO L225 Difference]: With dead ends: 284 [2022-03-18 02:43:47,228 INFO L226 Difference]: Without dead ends: 281 [2022-03-18 02:43:47,229 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 243 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=172, Invalid=698, Unknown=0, NotChecked=0, Total=870 [2022-03-18 02:43:47,229 INFO L912 BasicCegarLoop]: 55 mSDtfsCounter, 34 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 02:43:47,229 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 431 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 02:43:47,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-03-18 02:43:47,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 278. [2022-03-18 02:43:47,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 150 states have (on average 1.1333333333333333) internal successors, (170), 151 states have internal predecessors, (170), 101 states have call successors, (101), 27 states have call predecessors, (101), 26 states have return successors, (99), 99 states have call predecessors, (99), 99 states have call successors, (99) [2022-03-18 02:43:47,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 370 transitions. [2022-03-18 02:43:47,269 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 370 transitions. Word has length 135 [2022-03-18 02:43:47,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:43:47,270 INFO L478 AbstractCegarLoop]: Abstraction has 278 states and 370 transitions. [2022-03-18 02:43:47,270 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2022-03-18 02:43:47,270 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 370 transitions. [2022-03-18 02:43:47,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-18 02:43:47,270 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:43:47,271 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 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, 1, 1, 1, 1, 1] [2022-03-18 02:43:47,301 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-03-18 02:43:47,502 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 [2022-03-18 02:43:47,502 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:43:47,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:43:47,503 INFO L85 PathProgramCache]: Analyzing trace with hash -896647763, now seen corresponding path program 9 times [2022-03-18 02:43:47,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:47,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2006891171] [2022-03-18 02:43:47,503 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:43:47,503 INFO L85 PathProgramCache]: Analyzing trace with hash -896647763, now seen corresponding path program 10 times [2022-03-18 02:43:47,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:43:47,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403139134] [2022-03-18 02:43:47,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:43:47,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:43:47,513 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:43:47,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [318300794] [2022-03-18 02:43:47,513 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:43:47,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:43:47,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:43:47,514 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) [2022-03-18 02:43:47,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-18 02:43:47,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:43:47,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:43:47,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 87 conjunts are in the unsatisfiable core [2022-03-18 02:43:47,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:43:49,213 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:43:49,216 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:43:50,110 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 144 proven. 111 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-03-18 02:43:50,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:43:53,249 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 169 proven. 21 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2022-03-18 02:43:53,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:43:53,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403139134] [2022-03-18 02:43:53,250 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:43:53,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318300794] [2022-03-18 02:43:53,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318300794] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:43:53,251 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:43:53,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 15] total 33 [2022-03-18 02:43:53,251 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:43:53,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2006891171] [2022-03-18 02:43:53,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2006891171] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:43:53,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:43:53,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-18 02:43:53,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803684394] [2022-03-18 02:43:53,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:43:53,251 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-18 02:43:53,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:53,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-18 02:43:53,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=871, Unknown=0, NotChecked=0, Total=1056 [2022-03-18 02:43:53,252 INFO L87 Difference]: Start difference. First operand 278 states and 370 transitions. Second operand has 23 states, 20 states have (on average 1.8) internal successors, (36), 17 states have internal predecessors, (36), 10 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 11 states have call predecessors, (23), 9 states have call successors, (23) [2022-03-18 02:43:56,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:43:56,340 INFO L93 Difference]: Finished difference Result 327 states and 435 transitions. [2022-03-18 02:43:56,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-18 02:43:56,341 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 1.8) internal successors, (36), 17 states have internal predecessors, (36), 10 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 11 states have call predecessors, (23), 9 states have call successors, (23) Word has length 138 [2022-03-18 02:43:56,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:43:56,342 INFO L225 Difference]: With dead ends: 327 [2022-03-18 02:43:56,342 INFO L226 Difference]: Without dead ends: 324 [2022-03-18 02:43:56,343 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 243 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=294, Invalid=1428, Unknown=0, NotChecked=0, Total=1722 [2022-03-18 02:43:56,343 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 53 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 996 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 1065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-18 02:43:56,343 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 619 Invalid, 1065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 996 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-18 02:43:56,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-03-18 02:43:56,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 321. [2022-03-18 02:43:56,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 173 states have (on average 1.1329479768786128) internal successors, (196), 174 states have internal predecessors, (196), 117 states have call successors, (117), 31 states have call predecessors, (117), 30 states have return successors, (115), 115 states have call predecessors, (115), 115 states have call successors, (115) [2022-03-18 02:43:56,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 428 transitions. [2022-03-18 02:43:56,392 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 428 transitions. Word has length 138 [2022-03-18 02:43:56,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:43:56,392 INFO L478 AbstractCegarLoop]: Abstraction has 321 states and 428 transitions. [2022-03-18 02:43:56,392 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 1.8) internal successors, (36), 17 states have internal predecessors, (36), 10 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 11 states have call predecessors, (23), 9 states have call successors, (23) [2022-03-18 02:43:56,392 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 428 transitions. [2022-03-18 02:43:56,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-18 02:43:56,394 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:43:56,394 INFO L500 BasicCegarLoop]: trace histogram [19, 18, 18, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:43:56,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-18 02:43:56,610 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 [2022-03-18 02:43:56,610 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:43:56,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:43:56,611 INFO L85 PathProgramCache]: Analyzing trace with hash -604751514, now seen corresponding path program 11 times [2022-03-18 02:43:56,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:56,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1031102711] [2022-03-18 02:43:56,611 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:43:56,611 INFO L85 PathProgramCache]: Analyzing trace with hash -604751514, now seen corresponding path program 12 times [2022-03-18 02:43:56,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:43:56,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080027878] [2022-03-18 02:43:56,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:43:56,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:43:56,617 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:43:56,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1715159480] [2022-03-18 02:43:56,618 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:43:56,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:43:56,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:43:56,622 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) [2022-03-18 02:43:56,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-18 02:43:56,700 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 02:43:56,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:43:56,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-18 02:43:56,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:43:57,239 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 109 proven. 76 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2022-03-18 02:43:57,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:43:57,703 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 149 proven. 31 refuted. 0 times theorem prover too weak. 587 trivial. 0 not checked. [2022-03-18 02:43:57,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:43:57,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080027878] [2022-03-18 02:43:57,703 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:43:57,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715159480] [2022-03-18 02:43:57,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715159480] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:43:57,704 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:43:57,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 17 [2022-03-18 02:43:57,704 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:43:57,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1031102711] [2022-03-18 02:43:57,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1031102711] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:43:57,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:43:57,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 02:43:57,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751926333] [2022-03-18 02:43:57,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:43:57,705 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 02:43:57,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:57,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 02:43:57,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-03-18 02:43:57,705 INFO L87 Difference]: Start difference. First operand 321 states and 428 transitions. Second operand has 13 states, 12 states have (on average 2.75) internal successors, (33), 10 states have internal predecessors, (33), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2022-03-18 02:43:58,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:43:58,339 INFO L93 Difference]: Finished difference Result 360 states and 478 transitions. [2022-03-18 02:43:58,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-18 02:43:58,341 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 10 states have internal predecessors, (33), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) Word has length 149 [2022-03-18 02:43:58,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:43:58,348 INFO L225 Difference]: With dead ends: 360 [2022-03-18 02:43:58,348 INFO L226 Difference]: Without dead ends: 358 [2022-03-18 02:43:58,349 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 279 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-03-18 02:43:58,349 INFO L912 BasicCegarLoop]: 54 mSDtfsCounter, 39 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 02:43:58,349 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 405 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 02:43:58,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-03-18 02:43:58,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 354. [2022-03-18 02:43:58,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 191 states have (on average 1.130890052356021) internal successors, (216), 192 states have internal predecessors, (216), 129 states have call successors, (129), 34 states have call predecessors, (129), 33 states have return successors, (127), 127 states have call predecessors, (127), 127 states have call successors, (127) [2022-03-18 02:43:58,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 472 transitions. [2022-03-18 02:43:58,405 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 472 transitions. Word has length 149 [2022-03-18 02:43:58,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:43:58,406 INFO L478 AbstractCegarLoop]: Abstraction has 354 states and 472 transitions. [2022-03-18 02:43:58,406 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 10 states have internal predecessors, (33), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2022-03-18 02:43:58,406 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 472 transitions. [2022-03-18 02:43:58,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-03-18 02:43:58,407 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:43:58,407 INFO L500 BasicCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2022-03-18 02:43:58,423 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-03-18 02:43:58,624 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 [2022-03-18 02:43:58,624 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:43:58,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:43:58,624 INFO L85 PathProgramCache]: Analyzing trace with hash -162755237, now seen corresponding path program 13 times [2022-03-18 02:43:58,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:43:58,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [179463660] [2022-03-18 02:43:58,625 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:43:58,625 INFO L85 PathProgramCache]: Analyzing trace with hash -162755237, now seen corresponding path program 14 times [2022-03-18 02:43:58,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:43:58,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977547966] [2022-03-18 02:43:58,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:43:58,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:43:58,636 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:43:58,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [153451267] [2022-03-18 02:43:58,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:43:58,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:43:58,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:43:58,638 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) [2022-03-18 02:43:58,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-18 02:43:58,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:43:58,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:43:58,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-18 02:43:58,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:43:59,797 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 160 proven. 116 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2022-03-18 02:43:59,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:44:00,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:44:00,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977547966] [2022-03-18 02:44:00,296 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:44:00,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153451267] [2022-03-18 02:44:00,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153451267] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 02:44:00,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 02:44:00,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-03-18 02:44:00,296 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:44:00,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [179463660] [2022-03-18 02:44:00,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [179463660] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:44:00,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:44:00,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-18 02:44:00,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970648351] [2022-03-18 02:44:00,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:44:00,297 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-18 02:44:00,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:00,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-18 02:44:00,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2022-03-18 02:44:00,297 INFO L87 Difference]: Start difference. First operand 354 states and 472 transitions. Second operand has 15 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 9 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 8 states have call successors, (26) [2022-03-18 02:44:01,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:44:01,057 INFO L93 Difference]: Finished difference Result 363 states and 480 transitions. [2022-03-18 02:44:01,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 02:44:01,058 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 9 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 8 states have call successors, (26) Word has length 151 [2022-03-18 02:44:01,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:44:01,059 INFO L225 Difference]: With dead ends: 363 [2022-03-18 02:44:01,059 INFO L226 Difference]: Without dead ends: 361 [2022-03-18 02:44:01,060 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2022-03-18 02:44:01,060 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 29 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 02:44:01,060 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 507 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 02:44:01,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-03-18 02:44:01,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 325. [2022-03-18 02:44:01,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 176 states have (on average 1.1306818181818181) internal successors, (199), 177 states have internal predecessors, (199), 117 states have call successors, (117), 32 states have call predecessors, (117), 31 states have return successors, (115), 115 states have call predecessors, (115), 115 states have call successors, (115) [2022-03-18 02:44:01,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 431 transitions. [2022-03-18 02:44:01,112 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 431 transitions. Word has length 151 [2022-03-18 02:44:01,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:44:01,112 INFO L478 AbstractCegarLoop]: Abstraction has 325 states and 431 transitions. [2022-03-18 02:44:01,112 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 9 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 8 states have call successors, (26) [2022-03-18 02:44:01,112 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 431 transitions. [2022-03-18 02:44:01,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-03-18 02:44:01,113 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:44:01,113 INFO L500 BasicCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:44:01,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-18 02:44:01,327 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:01,327 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:44:01,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:44:01,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1672449564, now seen corresponding path program 15 times [2022-03-18 02:44:01,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:01,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [366223545] [2022-03-18 02:44:01,328 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:44:01,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1672449564, now seen corresponding path program 16 times [2022-03-18 02:44:01,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:44:01,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123158985] [2022-03-18 02:44:01,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:44:01,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:44:01,334 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:44:01,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1584796825] [2022-03-18 02:44:01,334 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:44:01,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:01,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:44:01,336 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:44:01,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-18 02:44:01,406 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:44:01,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:44:01,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 111 conjunts are in the unsatisfiable core [2022-03-18 02:44:01,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:44:03,120 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 161 proven. 225 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2022-03-18 02:44:03,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:44:07,927 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_main_~p~0 (* (- 1) c_main_~q~0 c_main_~k~0))) (.cse3 (+ c_main_~r~0 (* (- 1) (* c_main_~s~0 c_main_~k~0))))) (let ((.cse0 (* .cse3 c_main_~y~0)) (.cse2 (* .cse1 c_main_~x~0))) (let ((.cse4 (+ .cse0 .cse2)) (.cse5 (* c_main_~q~0 c_main_~x~0)) (.cse6 (* c_main_~s~0 c_main_~y~0))) (or (not (= (+ (* c_main_~p~0 c_main_~x~0) (* c_main_~r~0 c_main_~y~0)) c_main_~a~0)) (= (+ .cse0 (* c_main_~xy~0 .cse1) .cse2 (* c_main_~yy~0 .cse3)) (+ .cse0 (* .cse4 c_main_~y~0) .cse2)) (not (= c_main_~c~0 .cse4)) (not (= (+ .cse5 .cse6 (* c_main_~b~0 c_main_~y~0)) (+ (* c_main_~q~0 c_main_~xy~0) (* c_main_~yy~0 c_main_~s~0) c_main_~b~0))) (<= c_main_~b~0 c_main_~c~0) (not (= c_main_~b~0 (+ .cse5 .cse6))))))) is different from true [2022-03-18 02:44:07,994 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:44:18,477 WARN L232 SmtUtils]: Spent 5.88s on a formula simplification. DAG size of input: 74 DAG size of output: 73 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 02:44:18,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:44:18,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123158985] [2022-03-18 02:44:18,479 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:44:18,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584796825] [2022-03-18 02:44:18,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584796825] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 02:44:18,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 02:44:18,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-03-18 02:44:18,479 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:44:18,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [366223545] [2022-03-18 02:44:18,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [366223545] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:44:18,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:44:18,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-18 02:44:18,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516556956] [2022-03-18 02:44:18,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:44:18,480 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-18 02:44:18,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:18,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-18 02:44:18,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=642, Unknown=2, NotChecked=54, Total=870 [2022-03-18 02:44:18,481 INFO L87 Difference]: Start difference. First operand 325 states and 431 transitions. Second operand has 21 states, 20 states have (on average 1.85) internal successors, (37), 16 states have internal predecessors, (37), 11 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 10 states have call predecessors, (26), 11 states have call successors, (26) [2022-03-18 02:44:22,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:44:22,333 INFO L93 Difference]: Finished difference Result 338 states and 442 transitions. [2022-03-18 02:44:22,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-18 02:44:22,333 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.85) internal successors, (37), 16 states have internal predecessors, (37), 11 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 10 states have call predecessors, (26), 11 states have call successors, (26) Word has length 154 [2022-03-18 02:44:22,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:44:22,335 INFO L225 Difference]: With dead ends: 338 [2022-03-18 02:44:22,335 INFO L226 Difference]: Without dead ends: 336 [2022-03-18 02:44:22,335 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 160 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=218, Invalid=906, Unknown=2, NotChecked=64, Total=1190 [2022-03-18 02:44:22,336 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 47 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-18 02:44:22,336 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 515 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 831 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-18 02:44:22,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-03-18 02:44:22,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 333. [2022-03-18 02:44:22,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 182 states have (on average 1.1263736263736264) internal successors, (205), 183 states have internal predecessors, (205), 117 states have call successors, (117), 34 states have call predecessors, (117), 33 states have return successors, (115), 115 states have call predecessors, (115), 115 states have call successors, (115) [2022-03-18 02:44:22,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 437 transitions. [2022-03-18 02:44:22,388 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 437 transitions. Word has length 154 [2022-03-18 02:44:22,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:44:22,388 INFO L478 AbstractCegarLoop]: Abstraction has 333 states and 437 transitions. [2022-03-18 02:44:22,388 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.85) internal successors, (37), 16 states have internal predecessors, (37), 11 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 10 states have call predecessors, (26), 11 states have call successors, (26) [2022-03-18 02:44:22,388 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 437 transitions. [2022-03-18 02:44:22,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-03-18 02:44:22,389 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:44:22,389 INFO L500 BasicCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:44:22,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-18 02:44:22,598 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-18 02:44:22,598 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:44:22,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:44:22,598 INFO L85 PathProgramCache]: Analyzing trace with hash -2059109762, now seen corresponding path program 17 times [2022-03-18 02:44:22,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:22,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [81379256] [2022-03-18 02:44:22,599 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:44:22,599 INFO L85 PathProgramCache]: Analyzing trace with hash -2059109762, now seen corresponding path program 18 times [2022-03-18 02:44:22,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:44:22,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34246229] [2022-03-18 02:44:22,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:44:22,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:44:22,608 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:44:22,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1968746881] [2022-03-18 02:44:22,608 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:44:22,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:22,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:44:22,610 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:44:22,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-18 02:44:23,195 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 02:44:23,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:44:23,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-18 02:44:23,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:44:25,976 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:44:27,633 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 132 proven. 80 refuted. 0 times theorem prover too weak. 633 trivial. 0 not checked. [2022-03-18 02:44:27,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:44:33,612 WARN L855 $PredicateComparison]: unable to prove that (forall ((main_~k~0 Int)) (let ((.cse5 (* (- 1) c_main_~q~0 main_~k~0)) (.cse4 (* c_main_~s~0 main_~k~0)) (.cse11 (* c_main_~p~0 c_main_~x~0)) (.cse12 (* c_main_~r~0 c_main_~y~0)) (.cse8 (* c_main_~s~0 main_~k~0 c_main_~y~0)) (.cse9 (* c_main_~q~0 c_main_~x~0)) (.cse14 (* (- 1) c_main_~r~0 c_main_~y~0)) (.cse15 (* c_main_~s~0 c_main_~y~0)) (.cse17 (* c_main_~q~0 main_~k~0 c_main_~x~0)) (.cse18 (* (- 1) c_main_~p~0 c_main_~x~0))) (or (let ((.cse2 (+ c_main_~q~0 (* (- 1) c_main_~p~0) (* (- 1) .cse5))) (.cse3 (+ c_main_~s~0 .cse4 (* (- 1) c_main_~r~0)))) (let ((.cse0 (* .cse3 c_main_~y~0)) (.cse1 (* .cse2 c_main_~x~0))) (= (+ .cse0 .cse1 (* c_main_~y~0 (+ .cse0 .cse1))) (+ .cse0 (* .cse2 c_main_~xy~0) (* c_main_~yy~0 .cse3) .cse1)))) (not (let ((.cse6 (+ (* (- 1) .cse4) c_main_~r~0)) (.cse7 (* (- 1) c_main_~q~0 main_~k~0 c_main_~x~0)) (.cse10 (* (- 1) c_main_~s~0 c_main_~y~0)) (.cse13 (* (- 1) c_main_~q~0 c_main_~x~0)) (.cse16 (* (- 1) c_main_~s~0 main_~k~0 c_main_~y~0)) (.cse19 (+ c_main_~p~0 .cse5))) (= (+ (* .cse6 c_main_~y~0) (* (+ .cse7 .cse8 .cse9 .cse10 .cse11 c_main_~c~0 .cse12 .cse13 .cse14 .cse15 .cse16 .cse17 .cse18) c_main_~y~0) (* .cse19 c_main_~x~0)) (+ (* c_main_~yy~0 .cse6) .cse7 .cse8 .cse9 .cse10 .cse11 c_main_~c~0 .cse12 .cse13 .cse14 .cse15 .cse16 (* c_main_~xy~0 .cse19) .cse17 .cse18)))) (<= (+ .cse11 c_main_~c~0 .cse12) (+ .cse8 .cse9 .cse15 .cse17)) (not (= c_main_~b~0 (+ .cse8 .cse9 c_main_~c~0 .cse14 .cse15 .cse17 .cse18)))))) is different from true [2022-03-18 02:45:02,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:45:02,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34246229] [2022-03-18 02:45:02,309 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:45:02,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968746881] [2022-03-18 02:45:02,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968746881] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 02:45:02,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 02:45:02,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-03-18 02:45:02,309 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:45:02,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [81379256] [2022-03-18 02:45:02,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [81379256] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:45:02,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:45:02,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-18 02:45:02,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102165018] [2022-03-18 02:45:02,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:45:02,310 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 02:45:02,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:45:02,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 02:45:02,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=605, Unknown=6, NotChecked=52, Total=812 [2022-03-18 02:45:02,311 INFO L87 Difference]: Start difference. First operand 333 states and 437 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 16 states have internal predecessors, (36), 7 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2022-03-18 02:45:12,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:45:12,541 INFO L93 Difference]: Finished difference Result 351 states and 455 transitions. [2022-03-18 02:45:12,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-18 02:45:12,541 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 16 states have internal predecessors, (36), 7 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) Word has length 154 [2022-03-18 02:45:12,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:45:12,543 INFO L225 Difference]: With dead ends: 351 [2022-03-18 02:45:12,543 INFO L226 Difference]: Without dead ends: 349 [2022-03-18 02:45:12,543 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 197 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 27.4s TimeCoverageRelationStatistics Valid=223, Invalid=964, Unknown=7, NotChecked=66, Total=1260 [2022-03-18 02:45:12,544 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 43 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:45:12,544 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 353 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 609 Invalid, 0 Unknown, 12 Unchecked, 3.0s Time] [2022-03-18 02:45:12,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-03-18 02:45:12,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 339. [2022-03-18 02:45:12,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 187 states have (on average 1.1229946524064172) internal successors, (210), 187 states have internal predecessors, (210), 117 states have call successors, (117), 36 states have call predecessors, (117), 34 states have return successors, (115), 115 states have call predecessors, (115), 115 states have call successors, (115) [2022-03-18 02:45:12,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 442 transitions. [2022-03-18 02:45:12,625 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 442 transitions. Word has length 154 [2022-03-18 02:45:12,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:45:12,625 INFO L478 AbstractCegarLoop]: Abstraction has 339 states and 442 transitions. [2022-03-18 02:45:12,626 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 16 states have internal predecessors, (36), 7 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2022-03-18 02:45:12,626 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 442 transitions. [2022-03-18 02:45:12,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-03-18 02:45:12,627 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:45:12,627 INFO L500 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2022-03-18 02:45:12,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-18 02:45:12,842 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-18 02:45:12,842 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:45:12,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:45:12,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1023835477, now seen corresponding path program 11 times [2022-03-18 02:45:12,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:45:12,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [193319599] [2022-03-18 02:45:12,843 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:45:12,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1023835477, now seen corresponding path program 12 times [2022-03-18 02:45:12,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:45:12,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407736160] [2022-03-18 02:45:12,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:45:12,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:45:12,848 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:45:12,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1811337293] [2022-03-18 02:45:12,849 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:45:12,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:45:12,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:45:12,850 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:45:12,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-18 02:45:13,143 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 02:45:13,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:45:13,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-18 02:45:13,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:45:14,352 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 93 proven. 63 refuted. 0 times theorem prover too weak. 766 trivial. 0 not checked. [2022-03-18 02:45:14,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:45:14,848 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:45:20,189 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 105 proven. 36 refuted. 0 times theorem prover too weak. 781 trivial. 0 not checked. [2022-03-18 02:45:20,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:45:20,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407736160] [2022-03-18 02:45:20,190 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:45:20,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811337293] [2022-03-18 02:45:20,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811337293] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:45:20,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:45:20,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 26 [2022-03-18 02:45:20,190 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:45:20,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [193319599] [2022-03-18 02:45:20,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [193319599] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:45:20,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:45:20,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-18 02:45:20,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113276247] [2022-03-18 02:45:20,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:45:20,191 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-18 02:45:20,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:45:20,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-18 02:45:20,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=547, Unknown=2, NotChecked=0, Total=650 [2022-03-18 02:45:20,191 INFO L87 Difference]: Start difference. First operand 339 states and 442 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-18 02:45:21,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:45:21,065 INFO L93 Difference]: Finished difference Result 355 states and 455 transitions. [2022-03-18 02:45:21,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 02:45:21,065 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) Word has length 157 [2022-03-18 02:45:21,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:45:21,067 INFO L225 Difference]: With dead ends: 355 [2022-03-18 02:45:21,067 INFO L226 Difference]: Without dead ends: 352 [2022-03-18 02:45:21,067 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 288 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=161, Invalid=829, Unknown=2, NotChecked=0, Total=992 [2022-03-18 02:45:21,067 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 34 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 02:45:21,068 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 313 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 02:45:21,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-03-18 02:45:21,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 351. [2022-03-18 02:45:21,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 196 states have (on average 1.1122448979591837) internal successors, (218), 196 states have internal predecessors, (218), 117 states have call successors, (117), 39 states have call predecessors, (117), 37 states have return successors, (115), 115 states have call predecessors, (115), 115 states have call successors, (115) [2022-03-18 02:45:21,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 450 transitions. [2022-03-18 02:45:21,136 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 450 transitions. Word has length 157 [2022-03-18 02:45:21,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:45:21,136 INFO L478 AbstractCegarLoop]: Abstraction has 351 states and 450 transitions. [2022-03-18 02:45:21,136 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-18 02:45:21,136 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 450 transitions. [2022-03-18 02:45:21,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-03-18 02:45:21,137 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:45:21,137 INFO L500 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:45:21,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-18 02:45:21,354 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-18 02:45:21,354 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:45:21,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:45:21,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1001336492, now seen corresponding path program 13 times [2022-03-18 02:45:21,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:45:21,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [270210789] [2022-03-18 02:45:21,355 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:45:21,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1001336492, now seen corresponding path program 14 times [2022-03-18 02:45:21,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:45:21,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330495221] [2022-03-18 02:45:21,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:45:21,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:45:21,366 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:45:21,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [236545047] [2022-03-18 02:45:21,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:45:21,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:45:21,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:45:21,367 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:45:21,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-18 02:45:21,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:45:21,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:45:21,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 76 conjunts are in the unsatisfiable core [2022-03-18 02:45:21,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:45:22,199 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:45:22,201 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:45:22,526 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 142 proven. 118 refuted. 0 times theorem prover too weak. 667 trivial. 0 not checked. [2022-03-18 02:45:22,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:45:25,924 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:45:25,926 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:45:28,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:45:28,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330495221] [2022-03-18 02:45:28,039 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:45:28,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236545047] [2022-03-18 02:45:28,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236545047] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 02:45:28,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 02:45:28,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-03-18 02:45:28,039 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:45:28,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [270210789] [2022-03-18 02:45:28,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [270210789] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:45:28,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:45:28,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-18 02:45:28,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303055796] [2022-03-18 02:45:28,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:45:28,040 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-18 02:45:28,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:45:28,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-18 02:45:28,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2022-03-18 02:45:28,040 INFO L87 Difference]: Start difference. First operand 351 states and 450 transitions. Second operand has 17 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 10 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 9 states have call successors, (27) [2022-03-18 02:45:31,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:45:31,874 INFO L93 Difference]: Finished difference Result 396 states and 512 transitions. [2022-03-18 02:45:31,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 02:45:31,875 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 10 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 9 states have call successors, (27) Word has length 160 [2022-03-18 02:45:31,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:45:31,877 INFO L225 Difference]: With dead ends: 396 [2022-03-18 02:45:31,877 INFO L226 Difference]: Without dead ends: 393 [2022-03-18 02:45:31,877 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 231 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2022-03-18 02:45:31,878 INFO L912 BasicCegarLoop]: 59 mSDtfsCounter, 36 mSDsluCounter, 686 mSDsCounter, 0 mSdLazyCounter, 906 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 745 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-18 02:45:31,878 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 745 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 906 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-18 02:45:31,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-03-18 02:45:31,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 390. [2022-03-18 02:45:31,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 216 states have (on average 1.1157407407407407) internal successors, (241), 216 states have internal predecessors, (241), 133 states have call successors, (133), 42 states have call predecessors, (133), 40 states have return successors, (131), 131 states have call predecessors, (131), 131 states have call successors, (131) [2022-03-18 02:45:31,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 505 transitions. [2022-03-18 02:45:31,961 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 505 transitions. Word has length 160 [2022-03-18 02:45:31,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:45:31,962 INFO L478 AbstractCegarLoop]: Abstraction has 390 states and 505 transitions. [2022-03-18 02:45:31,962 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 10 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 9 states have call successors, (27) [2022-03-18 02:45:31,962 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 505 transitions. [2022-03-18 02:45:31,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-03-18 02:45:31,963 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:45:31,963 INFO L500 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:45:31,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-18 02:45:32,179 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-18 02:45:32,179 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:45:32,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:45:32,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1560660366, now seen corresponding path program 15 times [2022-03-18 02:45:32,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:45:32,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [477932708] [2022-03-18 02:45:32,180 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:45:32,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1560660366, now seen corresponding path program 16 times [2022-03-18 02:45:32,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:45:32,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657877215] [2022-03-18 02:45:32,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:45:32,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:45:32,190 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:45:32,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [17880757] [2022-03-18 02:45:32,191 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:45:32,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:45:32,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:45:32,198 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:45:32,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-18 02:45:32,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:45:32,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:45:32,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 100 conjunts are in the unsatisfiable core [2022-03-18 02:45:32,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:45:33,423 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:45:33,424 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:45:33,770 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:45:35,790 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:45:35,954 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 219 proven. 161 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2022-03-18 02:45:35,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:45:40,841 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 251 proven. 19 refuted. 0 times theorem prover too weak. 657 trivial. 0 not checked. [2022-03-18 02:45:40,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:45:40,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657877215] [2022-03-18 02:45:40,841 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:45:40,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17880757] [2022-03-18 02:45:40,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17880757] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:45:40,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:45:40,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13] total 28 [2022-03-18 02:45:40,842 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:45:40,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [477932708] [2022-03-18 02:45:40,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [477932708] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:45:40,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:45:40,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-18 02:45:40,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200018089] [2022-03-18 02:45:40,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:45:40,842 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-18 02:45:40,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:45:40,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-18 02:45:40,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2022-03-18 02:45:40,843 INFO L87 Difference]: Start difference. First operand 390 states and 505 transitions. Second operand has 20 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 11 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 11 states have call predecessors, (27), 10 states have call successors, (27) [2022-03-18 02:45:44,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:45:44,381 INFO L93 Difference]: Finished difference Result 469 states and 612 transitions. [2022-03-18 02:45:44,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-18 02:45:44,382 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 11 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 11 states have call predecessors, (27), 10 states have call successors, (27) Word has length 160 [2022-03-18 02:45:44,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:45:44,384 INFO L225 Difference]: With dead ends: 469 [2022-03-18 02:45:44,384 INFO L226 Difference]: Without dead ends: 466 [2022-03-18 02:45:44,385 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 287 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=157, Invalid=965, Unknown=0, NotChecked=0, Total=1122 [2022-03-18 02:45:44,385 INFO L912 BasicCegarLoop]: 61 mSDtfsCounter, 39 mSDsluCounter, 624 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-18 02:45:44,385 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 685 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 818 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-18 02:45:44,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-03-18 02:45:44,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 433. [2022-03-18 02:45:44,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 239 states have (on average 1.1171548117154813) internal successors, (267), 239 states have internal predecessors, (267), 149 states have call successors, (149), 46 states have call predecessors, (149), 44 states have return successors, (147), 147 states have call predecessors, (147), 147 states have call successors, (147) [2022-03-18 02:45:44,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 563 transitions. [2022-03-18 02:45:44,481 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 563 transitions. Word has length 160 [2022-03-18 02:45:44,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:45:44,481 INFO L478 AbstractCegarLoop]: Abstraction has 433 states and 563 transitions. [2022-03-18 02:45:44,481 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 11 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 11 states have call predecessors, (27), 10 states have call successors, (27) [2022-03-18 02:45:44,481 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 563 transitions. [2022-03-18 02:45:44,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-03-18 02:45:44,482 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:45:44,483 INFO L500 BasicCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 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] [2022-03-18 02:45:44,501 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-03-18 02:45:44,699 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-18 02:45:44,699 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:45:44,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:45:44,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1302140698, now seen corresponding path program 19 times [2022-03-18 02:45:44,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:45:44,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [953254845] [2022-03-18 02:45:44,700 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:45:44,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1302140698, now seen corresponding path program 20 times [2022-03-18 02:45:44,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:45:44,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667205874] [2022-03-18 02:45:44,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:45:44,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:45:44,708 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:45:44,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1161753250] [2022-03-18 02:45:44,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:45:44,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:45:44,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:45:44,709 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:45:44,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-18 02:45:44,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:45:44,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:45:44,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 95 conjunts are in the unsatisfiable core [2022-03-18 02:45:44,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:45:46,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1205 backedges. 251 proven. 176 refuted. 0 times theorem prover too weak. 778 trivial. 0 not checked. [2022-03-18 02:45:46,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:46:12,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1205 backedges. 210 proven. 151 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2022-03-18 02:46:12,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:46:12,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667205874] [2022-03-18 02:46:12,935 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:46:12,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161753250] [2022-03-18 02:46:12,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161753250] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:46:12,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:46:12,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 35 [2022-03-18 02:46:12,935 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:46:12,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [953254845] [2022-03-18 02:46:12,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [953254845] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:46:12,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:46:12,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-18 02:46:12,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132595710] [2022-03-18 02:46:12,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:46:12,936 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-18 02:46:12,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:46:12,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-18 02:46:12,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=932, Unknown=1, NotChecked=0, Total=1190 [2022-03-18 02:46:12,936 INFO L87 Difference]: Start difference. First operand 433 states and 563 transitions. Second operand has 21 states, 20 states have (on average 1.8) internal successors, (36), 17 states have internal predecessors, (36), 12 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 11 states have call predecessors, (30), 12 states have call successors, (30) [2022-03-18 02:46:16,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:46:16,458 INFO L93 Difference]: Finished difference Result 489 states and 633 transitions. [2022-03-18 02:46:16,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-18 02:46:16,458 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.8) internal successors, (36), 17 states have internal predecessors, (36), 12 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 11 states have call predecessors, (30), 12 states have call successors, (30) Word has length 173 [2022-03-18 02:46:16,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:46:16,460 INFO L225 Difference]: With dead ends: 489 [2022-03-18 02:46:16,460 INFO L226 Difference]: Without dead ends: 487 [2022-03-18 02:46:16,461 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 309 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=295, Invalid=1185, Unknown=2, NotChecked=0, Total=1482 [2022-03-18 02:46:16,462 INFO L912 BasicCegarLoop]: 51 mSDtfsCounter, 61 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 939 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-18 02:46:16,462 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 383 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 939 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-18 02:46:16,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2022-03-18 02:46:16,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 480. [2022-03-18 02:46:16,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 265 states have (on average 1.1169811320754717) internal successors, (296), 265 states have internal predecessors, (296), 165 states have call successors, (165), 51 states have call predecessors, (165), 49 states have return successors, (163), 163 states have call predecessors, (163), 163 states have call successors, (163) [2022-03-18 02:46:16,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 624 transitions. [2022-03-18 02:46:16,559 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 624 transitions. Word has length 173 [2022-03-18 02:46:16,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:46:16,559 INFO L478 AbstractCegarLoop]: Abstraction has 480 states and 624 transitions. [2022-03-18 02:46:16,559 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.8) internal successors, (36), 17 states have internal predecessors, (36), 12 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 11 states have call predecessors, (30), 12 states have call successors, (30) [2022-03-18 02:46:16,560 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 624 transitions. [2022-03-18 02:46:16,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-03-18 02:46:16,561 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:46:16,561 INFO L500 BasicCegarLoop]: trace histogram [23, 22, 22, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:46:16,578 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-03-18 02:46:16,769 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:46:16,769 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:46:16,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:46:16,769 INFO L85 PathProgramCache]: Analyzing trace with hash 2118008102, now seen corresponding path program 21 times [2022-03-18 02:46:16,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:46:16,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1294471156] [2022-03-18 02:46:16,770 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:46:16,770 INFO L85 PathProgramCache]: Analyzing trace with hash 2118008102, now seen corresponding path program 22 times [2022-03-18 02:46:16,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:46:16,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614008319] [2022-03-18 02:46:16,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:46:16,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:46:16,776 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:46:16,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2079221187] [2022-03-18 02:46:16,776 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:46:16,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:46:16,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:46:16,777 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:46:16,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-18 02:46:16,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:46:16,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:46:16,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 99 conjunts are in the unsatisfiable core [2022-03-18 02:46:16,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:46:17,895 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:46:17,899 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:46:21,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1123 backedges. 171 proven. 223 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2022-03-18 02:46:21,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:46:23,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1123 backedges. 227 proven. 32 refuted. 0 times theorem prover too weak. 864 trivial. 0 not checked. [2022-03-18 02:46:23,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:46:23,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614008319] [2022-03-18 02:46:23,343 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:46:23,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079221187] [2022-03-18 02:46:23,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079221187] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:46:23,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:46:23,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11] total 26 [2022-03-18 02:46:23,344 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:46:23,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1294471156] [2022-03-18 02:46:23,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1294471156] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:46:23,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:46:23,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-18 02:46:23,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409697096] [2022-03-18 02:46:23,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:46:23,344 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-18 02:46:23,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:46:23,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-18 02:46:23,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2022-03-18 02:46:23,345 INFO L87 Difference]: Start difference. First operand 480 states and 624 transitions. Second operand has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 17 states have internal predecessors, (39), 11 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 11 states have call predecessors, (29), 11 states have call successors, (29) [2022-03-18 02:46:25,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:46:25,593 INFO L93 Difference]: Finished difference Result 520 states and 675 transitions. [2022-03-18 02:46:25,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-18 02:46:25,593 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 17 states have internal predecessors, (39), 11 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 11 states have call predecessors, (29), 11 states have call successors, (29) Word has length 174 [2022-03-18 02:46:25,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:46:25,596 INFO L225 Difference]: With dead ends: 520 [2022-03-18 02:46:25,596 INFO L226 Difference]: Without dead ends: 518 [2022-03-18 02:46:25,597 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 321 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=180, Invalid=876, Unknown=0, NotChecked=0, Total=1056 [2022-03-18 02:46:25,597 INFO L912 BasicCegarLoop]: 61 mSDtfsCounter, 38 mSDsluCounter, 778 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 839 SdHoareTripleChecker+Invalid, 1068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-18 02:46:25,598 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 839 Invalid, 1068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1003 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-18 02:46:25,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2022-03-18 02:46:25,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 513. [2022-03-18 02:46:25,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 283 states have (on average 1.11660777385159) internal successors, (316), 283 states have internal predecessors, (316), 177 states have call successors, (177), 54 states have call predecessors, (177), 52 states have return successors, (175), 175 states have call predecessors, (175), 175 states have call successors, (175) [2022-03-18 02:46:25,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 668 transitions. [2022-03-18 02:46:25,711 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 668 transitions. Word has length 174 [2022-03-18 02:46:25,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:46:25,711 INFO L478 AbstractCegarLoop]: Abstraction has 513 states and 668 transitions. [2022-03-18 02:46:25,711 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 17 states have internal predecessors, (39), 11 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 11 states have call predecessors, (29), 11 states have call successors, (29) [2022-03-18 02:46:25,711 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 668 transitions. [2022-03-18 02:46:25,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-03-18 02:46:25,713 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:46:25,713 INFO L500 BasicCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 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] [2022-03-18 02:46:25,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-18 02:46:25,929 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-03-18 02:46:25,930 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:46:25,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:46:25,930 INFO L85 PathProgramCache]: Analyzing trace with hash 774152475, now seen corresponding path program 23 times [2022-03-18 02:46:25,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:46:25,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1425226646] [2022-03-18 02:46:25,931 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:46:25,931 INFO L85 PathProgramCache]: Analyzing trace with hash 774152475, now seen corresponding path program 24 times [2022-03-18 02:46:25,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:46:25,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441706296] [2022-03-18 02:46:25,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:46:25,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:46:25,936 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:46:25,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1565935713] [2022-03-18 02:46:25,936 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:46:25,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:46:25,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:46:25,937 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:46:25,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-18 02:46:26,493 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 02:46:26,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:46:26,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-18 02:46:26,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:46:28,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 129 proven. 57 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2022-03-18 02:46:28,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:46:31,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:46:31,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441706296] [2022-03-18 02:46:31,009 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:46:31,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565935713] [2022-03-18 02:46:31,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565935713] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 02:46:31,009 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 02:46:31,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-18 02:46:31,010 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:46:31,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1425226646] [2022-03-18 02:46:31,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1425226646] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:46:31,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:46:31,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-18 02:46:31,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98602586] [2022-03-18 02:46:31,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:46:31,011 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 02:46:31,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:46:31,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 02:46:31,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=386, Unknown=1, NotChecked=0, Total=506 [2022-03-18 02:46:31,012 INFO L87 Difference]: Start difference. First operand 513 states and 668 transitions. Second operand has 16 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) [2022-03-18 02:46:32,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:46:32,109 INFO L93 Difference]: Finished difference Result 572 states and 753 transitions. [2022-03-18 02:46:32,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 02:46:32,110 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) Word has length 176 [2022-03-18 02:46:32,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:46:32,113 INFO L225 Difference]: With dead ends: 572 [2022-03-18 02:46:32,113 INFO L226 Difference]: Without dead ends: 570 [2022-03-18 02:46:32,113 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 200 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=154, Invalid=547, Unknown=1, NotChecked=0, Total=702 [2022-03-18 02:46:32,114 INFO L912 BasicCegarLoop]: 55 mSDtfsCounter, 31 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-18 02:46:32,114 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 465 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-18 02:46:32,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2022-03-18 02:46:32,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 527. [2022-03-18 02:46:32,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 291 states have (on average 1.1168384879725086) internal successors, (325), 293 states have internal predecessors, (325), 183 states have call successors, (183), 54 states have call predecessors, (183), 52 states have return successors, (181), 179 states have call predecessors, (181), 181 states have call successors, (181) [2022-03-18 02:46:32,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 689 transitions. [2022-03-18 02:46:32,234 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 689 transitions. Word has length 176 [2022-03-18 02:46:32,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:46:32,234 INFO L478 AbstractCegarLoop]: Abstraction has 527 states and 689 transitions. [2022-03-18 02:46:32,234 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) [2022-03-18 02:46:32,234 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 689 transitions. [2022-03-18 02:46:32,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-03-18 02:46:32,236 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:46:32,236 INFO L500 BasicCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 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] [2022-03-18 02:46:32,241 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-18 02:46:32,441 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:46:32,441 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:46:32,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:46:32,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1224554493, now seen corresponding path program 25 times [2022-03-18 02:46:32,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:46:32,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [594156834] [2022-03-18 02:46:32,442 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:46:32,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1224554493, now seen corresponding path program 26 times [2022-03-18 02:46:32,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:46:32,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155326081] [2022-03-18 02:46:32,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:46:32,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:46:32,449 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:46:32,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1445312223] [2022-03-18 02:46:32,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:46:32,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:46:32,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:46:32,451 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:46:32,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-18 02:46:32,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:46:32,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:46:32,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 93 conjunts are in the unsatisfiable core [2022-03-18 02:46:32,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:46:35,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 211 proven. 122 refuted. 0 times theorem prover too weak. 877 trivial. 0 not checked. [2022-03-18 02:46:35,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:47:08,523 WARN L232 SmtUtils]: Spent 8.74s on a formula simplification that was a NOOP. DAG size: 65 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 02:48:22,735 WARN L232 SmtUtils]: Spent 8.40s on a formula simplification that was a NOOP. DAG size: 78 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 02:49:55,000 WARN L232 SmtUtils]: Spent 10.53s on a formula simplification that was a NOOP. DAG size: 87 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 02:50:58,095 WARN L232 SmtUtils]: Spent 5.06s on a formula simplification that was a NOOP. DAG size: 77 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 02:51:04,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 223 proven. 83 refuted. 12 times theorem prover too weak. 892 trivial. 0 not checked. [2022-03-18 02:51:04,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:51:04,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155326081] [2022-03-18 02:51:04,090 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:51:04,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445312223] [2022-03-18 02:51:04,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445312223] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:51:04,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:51:04,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 35 [2022-03-18 02:51:04,091 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:51:04,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [594156834] [2022-03-18 02:51:04,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [594156834] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:51:04,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:51:04,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-18 02:51:04,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363778731] [2022-03-18 02:51:04,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:51:04,091 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-18 02:51:04,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:51:04,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-18 02:51:04,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=916, Unknown=14, NotChecked=0, Total=1190 [2022-03-18 02:51:04,092 INFO L87 Difference]: Start difference. First operand 527 states and 689 transitions. Second operand has 21 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 10 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 9 states have call predecessors, (30), 10 states have call successors, (30) [2022-03-18 02:51:13,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:51:13,064 INFO L93 Difference]: Finished difference Result 553 states and 710 transitions. [2022-03-18 02:51:13,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-18 02:51:13,064 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 10 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 9 states have call predecessors, (30), 10 states have call successors, (30) Word has length 176 [2022-03-18 02:51:13,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:51:13,067 INFO L225 Difference]: With dead ends: 553 [2022-03-18 02:51:13,067 INFO L226 Difference]: Without dead ends: 551 [2022-03-18 02:51:13,067 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 313 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 92.5s TimeCoverageRelationStatistics Valid=433, Invalid=1621, Unknown=16, NotChecked=0, Total=2070 [2022-03-18 02:51:13,068 INFO L912 BasicCegarLoop]: 52 mSDtfsCounter, 54 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 1150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-18 02:51:13,068 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 562 Invalid, 1150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1030 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-18 02:51:13,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-03-18 02:51:13,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 503. [2022-03-18 02:51:13,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 281 states have (on average 1.113879003558719) internal successors, (313), 282 states have internal predecessors, (313), 168 states have call successors, (168), 55 states have call predecessors, (168), 53 states have return successors, (166), 165 states have call predecessors, (166), 166 states have call successors, (166) [2022-03-18 02:51:13,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 647 transitions. [2022-03-18 02:51:13,177 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 647 transitions. Word has length 176 [2022-03-18 02:51:13,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:51:13,177 INFO L478 AbstractCegarLoop]: Abstraction has 503 states and 647 transitions. [2022-03-18 02:51:13,177 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 10 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 9 states have call predecessors, (30), 10 states have call successors, (30) [2022-03-18 02:51:13,177 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 647 transitions. [2022-03-18 02:51:13,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-03-18 02:51:13,178 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:51:13,179 INFO L500 BasicCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:51:13,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-18 02:51:13,406 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:51:13,406 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:51:13,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:51:13,406 INFO L85 PathProgramCache]: Analyzing trace with hash 661049022, now seen corresponding path program 27 times [2022-03-18 02:51:13,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:51:13,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [991758579] [2022-03-18 02:51:13,407 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:51:13,407 INFO L85 PathProgramCache]: Analyzing trace with hash 661049022, now seen corresponding path program 28 times [2022-03-18 02:51:13,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:51:13,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910077141] [2022-03-18 02:51:13,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:51:13,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:51:13,412 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:51:13,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1425021262] [2022-03-18 02:51:13,413 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:51:13,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:51:13,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:51:13,414 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:51:13,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-18 02:51:13,850 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:51:13,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:51:13,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 115 conjunts are in the unsatisfiable core [2022-03-18 02:51:13,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:51:16,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 219 proven. 263 refuted. 0 times theorem prover too weak. 736 trivial. 0 not checked. [2022-03-18 02:51:16,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:51:21,611 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse4 (+ c_main_~p~0 (* (- 1) c_main_~q~0 c_main_~k~0))) (.cse5 (+ c_main_~r~0 (* (- 1) (* c_main_~s~0 c_main_~k~0))))) (let ((.cse2 (* c_main_~q~0 c_main_~x~0)) (.cse3 (* c_main_~s~0 c_main_~y~0)) (.cse0 (* .cse5 c_main_~y~0)) (.cse1 (* .cse4 c_main_~x~0))) (or (not (= c_main_~c~0 (+ .cse0 .cse1))) (not (= (+ .cse2 .cse3 (* c_main_~b~0 c_main_~y~0)) (+ (* c_main_~q~0 c_main_~xy~0) (* c_main_~yy~0 c_main_~s~0) c_main_~b~0))) (<= c_main_~b~0 c_main_~c~0) (not (= c_main_~b~0 (+ .cse2 .cse3))) (= (+ .cse0 .cse1 (* c_main_~c~0 c_main_~y~0)) (+ (* c_main_~xy~0 .cse4) c_main_~c~0 (* c_main_~yy~0 .cse5)))))) is different from true [2022-03-18 02:51:26,752 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:52:09,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:52:09,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910077141] [2022-03-18 02:52:09,637 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:52:09,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425021262] [2022-03-18 02:52:09,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425021262] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 02:52:09,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 02:52:09,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-03-18 02:52:09,638 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:52:09,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [991758579] [2022-03-18 02:52:09,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [991758579] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:52:09,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:52:09,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-18 02:52:09,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465912395] [2022-03-18 02:52:09,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:52:09,638 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-18 02:52:09,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:52:09,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-18 02:52:09,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=619, Unknown=10, NotChecked=54, Total=870 [2022-03-18 02:52:09,639 INFO L87 Difference]: Start difference. First operand 503 states and 647 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 17 states have internal predecessors, (39), 9 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2022-03-18 02:52:11,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:52:11,978 INFO L93 Difference]: Finished difference Result 517 states and 659 transitions. [2022-03-18 02:52:11,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-18 02:52:11,979 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 17 states have internal predecessors, (39), 9 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) Word has length 179 [2022-03-18 02:52:11,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:52:11,995 INFO L225 Difference]: With dead ends: 517 [2022-03-18 02:52:11,995 INFO L226 Difference]: Without dead ends: 515 [2022-03-18 02:52:11,996 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 218 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 28.9s TimeCoverageRelationStatistics Valid=325, Invalid=1229, Unknown=10, NotChecked=76, Total=1640 [2022-03-18 02:52:11,996 INFO L912 BasicCegarLoop]: 61 mSDtfsCounter, 37 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 943 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 1015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-18 02:52:11,997 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 786 Invalid, 1015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 943 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-18 02:52:12,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-03-18 02:52:12,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 511. [2022-03-18 02:52:12,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 287 states have (on average 1.1114982578397212) internal successors, (319), 288 states have internal predecessors, (319), 168 states have call successors, (168), 57 states have call predecessors, (168), 55 states have return successors, (166), 165 states have call predecessors, (166), 166 states have call successors, (166) [2022-03-18 02:52:12,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 653 transitions. [2022-03-18 02:52:12,190 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 653 transitions. Word has length 179 [2022-03-18 02:52:12,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:52:12,191 INFO L478 AbstractCegarLoop]: Abstraction has 511 states and 653 transitions. [2022-03-18 02:52:12,191 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 17 states have internal predecessors, (39), 9 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2022-03-18 02:52:12,191 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 653 transitions. [2022-03-18 02:52:12,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-03-18 02:52:12,201 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:52:12,201 INFO L500 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:52:12,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-18 02:52:12,406 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-03-18 02:52:12,407 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:52:12,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:52:12,407 INFO L85 PathProgramCache]: Analyzing trace with hash 2078525035, now seen corresponding path program 17 times [2022-03-18 02:52:12,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:52:12,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [33840052] [2022-03-18 02:52:12,407 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:52:12,408 INFO L85 PathProgramCache]: Analyzing trace with hash 2078525035, now seen corresponding path program 18 times [2022-03-18 02:52:12,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:52:12,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562428683] [2022-03-18 02:52:12,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:52:12,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:52:12,413 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:52:12,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1285671633] [2022-03-18 02:52:12,413 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:52:12,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:52:12,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:52:12,414 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:52:12,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-18 02:52:12,541 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 02:52:12,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:52:12,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 54 conjunts are in the unsatisfiable core [2022-03-18 02:52:12,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:52:13,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 107 proven. 63 refuted. 0 times theorem prover too weak. 1139 trivial. 0 not checked. [2022-03-18 02:52:13,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:52:13,176 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:52:13,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:52:13,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562428683] [2022-03-18 02:52:13,259 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:52:13,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285671633] [2022-03-18 02:52:13,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285671633] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 02:52:13,260 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 02:52:13,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-03-18 02:52:13,260 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:52:13,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [33840052] [2022-03-18 02:52:13,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [33840052] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:52:13,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:52:13,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 02:52:13,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276446756] [2022-03-18 02:52:13,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:52:13,260 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 02:52:13,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:52:13,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 02:52:13,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-03-18 02:52:13,261 INFO L87 Difference]: Start difference. First operand 511 states and 653 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-03-18 02:52:13,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:52:13,634 INFO L93 Difference]: Finished difference Result 553 states and 705 transitions. [2022-03-18 02:52:13,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 02:52:13,634 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 182 [2022-03-18 02:52:13,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:52:13,637 INFO L225 Difference]: With dead ends: 553 [2022-03-18 02:52:13,637 INFO L226 Difference]: Without dead ends: 550 [2022-03-18 02:52:13,637 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 190 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-03-18 02:52:13,637 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 29 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 02:52:13,638 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 303 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 02:52:13,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2022-03-18 02:52:13,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 497. [2022-03-18 02:52:13,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 280 states have (on average 1.1035714285714286) internal successors, (309), 281 states have internal predecessors, (309), 161 states have call successors, (161), 57 states have call predecessors, (161), 55 states have return successors, (159), 158 states have call predecessors, (159), 159 states have call successors, (159) [2022-03-18 02:52:13,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 629 transitions. [2022-03-18 02:52:13,757 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 629 transitions. Word has length 182 [2022-03-18 02:52:13,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:52:13,757 INFO L478 AbstractCegarLoop]: Abstraction has 497 states and 629 transitions. [2022-03-18 02:52:13,757 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-03-18 02:52:13,757 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 629 transitions. [2022-03-18 02:52:13,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-03-18 02:52:13,758 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:52:13,758 INFO L500 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:52:13,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-18 02:52:13,961 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-18 02:52:13,961 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:52:13,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:52:13,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1363924019, now seen corresponding path program 19 times [2022-03-18 02:52:13,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:52:13,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1713193480] [2022-03-18 02:52:13,962 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:52:13,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1363924019, now seen corresponding path program 20 times [2022-03-18 02:52:13,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:52:13,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254210311] [2022-03-18 02:52:13,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:52:13,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:52:13,974 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:52:13,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [86380780] [2022-03-18 02:52:13,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:52:13,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:52:13,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:52:13,976 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:52:13,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-18 02:52:14,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:52:14,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:52:14,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 80 conjunts are in the unsatisfiable core [2022-03-18 02:52:14,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:52:14,311 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:52:14,312 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:52:15,489 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:52:15,491 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:52:15,495 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:52:15,606 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:52:15,609 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:52:15,626 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:52:15,649 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:52:16,876 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:52:16,895 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:52:17,248 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:52:17,686 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:52:17,887 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:52:18,059 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:52:18,328 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:52:18,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 220 proven. 210 refuted. 0 times theorem prover too weak. 879 trivial. 0 not checked. [2022-03-18 02:52:18,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:52:22,953 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:52:23,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 250 proven. 12 refuted. 0 times theorem prover too weak. 1047 trivial. 0 not checked. [2022-03-18 02:52:23,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:52:23,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254210311] [2022-03-18 02:52:23,203 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:52:23,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86380780] [2022-03-18 02:52:23,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86380780] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:52:23,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:52:23,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11] total 26 [2022-03-18 02:52:23,203 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:52:23,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1713193480] [2022-03-18 02:52:23,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1713193480] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:52:23,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:52:23,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-18 02:52:23,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601919935] [2022-03-18 02:52:23,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:52:23,204 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-18 02:52:23,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:52:23,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-18 02:52:23,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=569, Unknown=1, NotChecked=0, Total=650 [2022-03-18 02:52:23,204 INFO L87 Difference]: Start difference. First operand 497 states and 629 transitions. Second operand has 20 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 13 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 10 states have call predecessors, (31), 12 states have call successors, (31) [2022-03-18 02:52:24,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:52:24,509 INFO L93 Difference]: Finished difference Result 516 states and 653 transitions. [2022-03-18 02:52:24,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-18 02:52:24,510 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 13 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 10 states have call predecessors, (31), 12 states have call successors, (31) Word has length 182 [2022-03-18 02:52:24,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:52:24,512 INFO L225 Difference]: With dead ends: 516 [2022-03-18 02:52:24,512 INFO L226 Difference]: Without dead ends: 509 [2022-03-18 02:52:24,513 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 338 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=111, Invalid=758, Unknown=1, NotChecked=0, Total=870 [2022-03-18 02:52:24,513 INFO L912 BasicCegarLoop]: 63 mSDtfsCounter, 35 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-18 02:52:24,513 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 658 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 687 Invalid, 0 Unknown, 123 Unchecked, 0.9s Time] [2022-03-18 02:52:24,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2022-03-18 02:52:24,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 503. [2022-03-18 02:52:24,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 282 states have (on average 1.1063829787234043) internal successors, (312), 283 states have internal predecessors, (312), 165 states have call successors, (165), 57 states have call predecessors, (165), 55 states have return successors, (163), 162 states have call predecessors, (163), 163 states have call successors, (163) [2022-03-18 02:52:24,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 640 transitions. [2022-03-18 02:52:24,633 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 640 transitions. Word has length 182 [2022-03-18 02:52:24,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:52:24,633 INFO L478 AbstractCegarLoop]: Abstraction has 503 states and 640 transitions. [2022-03-18 02:52:24,633 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 13 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 10 states have call predecessors, (31), 12 states have call successors, (31) [2022-03-18 02:52:24,633 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 640 transitions. [2022-03-18 02:52:24,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-03-18 02:52:24,634 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:52:24,634 INFO L500 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:52:24,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-18 02:52:24,851 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-18 02:52:24,852 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:52:24,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:52:24,852 INFO L85 PathProgramCache]: Analyzing trace with hash -804600145, now seen corresponding path program 21 times [2022-03-18 02:52:24,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:52:24,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [938097896] [2022-03-18 02:52:24,852 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:52:24,853 INFO L85 PathProgramCache]: Analyzing trace with hash -804600145, now seen corresponding path program 22 times [2022-03-18 02:52:24,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:52:24,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735393410] [2022-03-18 02:52:24,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:52:24,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:52:24,858 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:52:24,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1977216043] [2022-03-18 02:52:24,858 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:52:24,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:52:24,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:52:24,870 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:52:24,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-18 02:52:24,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:52:24,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:52:24,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 112 conjunts are in the unsatisfiable core [2022-03-18 02:52:24,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:52:26,129 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:56:15,356 WARN L232 SmtUtils]: Spent 5.38s on a formula simplification. DAG size of input: 8 DAG size of output: 1 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)