/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 04:58:41,488 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 04:58:41,489 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 04:58:41,511 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 04:58:41,535 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 04:58:41,536 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 04:58:41,536 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 04:58:41,537 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-19 04:58:41,543 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 04:58:41,543 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 04:58:41,544 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 04:58:41,544 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 04:58:41,544 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 04:58:41,544 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 04:58:41,544 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 04:58:41,544 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 04:58:41,545 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 04:58:41,545 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 04:58:41,545 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 04:58:41,545 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 04:58:41,545 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 04:58:41,545 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 04:58:41,545 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 04:58:41,546 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 04:58:41,546 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 04:58:41,546 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 04:58:41,546 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 04:58:41,546 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 04:58:41,546 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 04:58:41,546 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 04:58:41,547 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 04:58:41,547 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 04:58:41,552 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-19 04:58:41,552 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 04:58:41,724 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 04:58:41,737 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 04:58:41,738 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 04:58:41,739 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 04:58:41,745 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 04:58:41,746 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound20.c [2022-03-19 04:58:41,804 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03a653903/9f1e6c1feb0a41ea9c25463ddb33b45d/FLAG180c79f56 [2022-03-19 04:58:42,162 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 04:58:42,162 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound20.c [2022-03-19 04:58:42,173 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03a653903/9f1e6c1feb0a41ea9c25463ddb33b45d/FLAG180c79f56 [2022-03-19 04:58:42,183 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03a653903/9f1e6c1feb0a41ea9c25463ddb33b45d [2022-03-19 04:58:42,185 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 04:58:42,186 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 04:58:42,188 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 04:58:42,188 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 04:58:42,190 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 04:58:42,191 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 04:58:42" (1/1) ... [2022-03-19 04:58:42,192 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32139444 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:58:42, skipping insertion in model container [2022-03-19 04:58:42,192 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 04:58:42" (1/1) ... [2022-03-19 04:58:42,197 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 04:58:42,213 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 04:58:42,360 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/hard-ll_unwindbound20.c[538,551] [2022-03-19 04:58:42,380 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 04:58:42,386 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 04:58:42,395 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/hard-ll_unwindbound20.c[538,551] [2022-03-19 04:58:42,409 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 04:58:42,416 INFO L208 MainTranslator]: Completed translation [2022-03-19 04:58:42,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:58:42 WrapperNode [2022-03-19 04:58:42,417 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 04:58:42,418 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 04:58:42,418 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 04:58:42,418 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 04:58:42,425 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:58:42" (1/1) ... [2022-03-19 04:58:42,425 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:58:42" (1/1) ... [2022-03-19 04:58:42,429 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:58:42" (1/1) ... [2022-03-19 04:58:42,430 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:58:42" (1/1) ... [2022-03-19 04:58:42,433 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:58:42" (1/1) ... [2022-03-19 04:58:42,436 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:58:42" (1/1) ... [2022-03-19 04:58:42,437 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:58:42" (1/1) ... [2022-03-19 04:58:42,439 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 04:58:42,439 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 04:58:42,439 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 04:58:42,439 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 04:58:42,440 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:58:42" (1/1) ... [2022-03-19 04:58:42,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 04:58:42,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:58:42,460 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) [2022-03-19 04:58:42,461 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 [2022-03-19 04:58:42,485 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 04:58:42,485 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 04:58:42,485 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 04:58:42,485 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 04:58:42,485 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 04:58:42,485 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 04:58:42,485 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 04:58:42,485 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 04:58:42,485 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 04:58:42,485 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 04:58:42,485 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-19 04:58:42,486 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 04:58:42,486 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 04:58:42,486 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 04:58:42,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 04:58:42,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 04:58:42,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 04:58:42,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 04:58:42,486 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 04:58:42,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 04:58:42,532 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 04:58:42,533 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 04:58:42,620 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 04:58:42,625 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 04:58:42,625 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-19 04:58:42,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 04:58:42 BoogieIcfgContainer [2022-03-19 04:58:42,626 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 04:58:42,627 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 04:58:42,627 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 04:58:42,630 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 04:58:42,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 04:58:42" (1/3) ... [2022-03-19 04:58:42,630 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a79aadc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 04:58:42, skipping insertion in model container [2022-03-19 04:58:42,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:58:42" (2/3) ... [2022-03-19 04:58:42,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a79aadc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 04:58:42, skipping insertion in model container [2022-03-19 04:58:42,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 04:58:42" (3/3) ... [2022-03-19 04:58:42,632 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_unwindbound20.c [2022-03-19 04:58:42,635 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 04:58:42,636 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 04:58:42,689 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 04:58:42,710 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 [2022-03-19 04:58:42,711 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 04:58:42,739 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 04:58:42,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-19 04:58:42,746 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:58:42,746 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:58:42,747 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:58:42,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:58:42,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1191571617, now seen corresponding path program 1 times [2022-03-19 04:58:42,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:58:42,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [266655825] [2022-03-19 04:58:42,776 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:58:42,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1191571617, now seen corresponding path program 2 times [2022-03-19 04:58:42,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:58:42,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235122406] [2022-03-19 04:58:42,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:58:42,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:58:42,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 04:58:42,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 04:58:42,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 04:58:42,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 04:58:42,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 04:58:42,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 04:58:42,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:58:42,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235122406] [2022-03-19 04:58:42,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235122406] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:58:42,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:58:42,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 04:58:42,952 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:58:42,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [266655825] [2022-03-19 04:58:42,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [266655825] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:58:42,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:58:42,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 04:58:42,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938930851] [2022-03-19 04:58:42,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:58:42,957 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 04:58:42,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:58:42,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 04:58:42,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 04:58:42,986 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-19 04:58:43,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:58:43,121 INFO L93 Difference]: Finished difference Result 66 states and 101 transitions. [2022-03-19 04:58:43,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 04:58:43,124 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-03-19 04:58:43,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:58:43,130 INFO L225 Difference]: With dead ends: 66 [2022-03-19 04:58:43,130 INFO L226 Difference]: Without dead ends: 33 [2022-03-19 04:58:43,133 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 04:58:43,136 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:58:43,137 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 49 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:58:43,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-19 04:58:43,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-03-19 04:58:43,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 04:58:43,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-03-19 04:58:43,183 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2022-03-19 04:58:43,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:58:43,183 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-03-19 04:58:43,183 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-19 04:58:43,184 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-03-19 04:58:43,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-19 04:58:43,185 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:58:43,185 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:58:43,185 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 04:58:43,186 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:58:43,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:58:43,188 INFO L85 PathProgramCache]: Analyzing trace with hash 336486197, now seen corresponding path program 1 times [2022-03-19 04:58:43,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:58:43,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1185154081] [2022-03-19 04:58:43,196 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:58:43,196 INFO L85 PathProgramCache]: Analyzing trace with hash 336486197, now seen corresponding path program 2 times [2022-03-19 04:58:43,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:58:43,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485568172] [2022-03-19 04:58:43,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:58:43,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:58:43,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 04:58:43,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 04:58:43,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 04:58:43,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 04:58:43,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 04:58:43,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 04:58:43,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:58:43,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485568172] [2022-03-19 04:58:43,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485568172] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:58:43,340 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:58:43,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 04:58:43,340 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:58:43,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1185154081] [2022-03-19 04:58:43,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1185154081] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:58:43,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:58:43,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 04:58:43,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874810491] [2022-03-19 04:58:43,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:58:43,362 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 04:58:43,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:58:43,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 04:58:43,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-19 04:58:43,363 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-19 04:58:43,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:58:43,496 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2022-03-19 04:58:43,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 04:58:43,498 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-03-19 04:58:43,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:58:43,505 INFO L225 Difference]: With dead ends: 47 [2022-03-19 04:58:43,505 INFO L226 Difference]: Without dead ends: 45 [2022-03-19 04:58:43,505 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-19 04:58:43,508 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 28 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:58:43,508 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 96 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:58:43,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-19 04:58:43,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2022-03-19 04:58:43,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 04:58:43,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2022-03-19 04:58:43,528 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2022-03-19 04:58:43,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:58:43,529 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2022-03-19 04:58:43,529 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-19 04:58:43,529 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2022-03-19 04:58:43,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-19 04:58:43,529 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:58:43,529 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:58:43,529 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 04:58:43,530 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:58:43,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:58:43,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1819267188, now seen corresponding path program 1 times [2022-03-19 04:58:43,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:58:43,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1924916406] [2022-03-19 04:58:43,532 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:58:43,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1819267188, now seen corresponding path program 2 times [2022-03-19 04:58:43,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:58:43,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993658488] [2022-03-19 04:58:43,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:58:43,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:58:43,545 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:58:43,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1530766668] [2022-03-19 04:58:43,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:58:43,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:58:43,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:58:43,560 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) [2022-03-19 04:58:43,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 04:58:43,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-19 04:58:43,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:58:43,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-19 04:58:43,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:58:43,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 04:58:43,712 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 04:58:43,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:58:43,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993658488] [2022-03-19 04:58:43,712 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:58:43,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530766668] [2022-03-19 04:58:43,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530766668] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:58:43,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:58:43,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 04:58:43,713 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:58:43,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1924916406] [2022-03-19 04:58:43,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1924916406] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:58:43,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:58:43,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 04:58:43,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51686734] [2022-03-19 04:58:43,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:58:43,714 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 04:58:43,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:58:43,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 04:58:43,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 04:58:43,715 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 04:58:43,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:58:43,732 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2022-03-19 04:58:43,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 04:58:43,734 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-03-19 04:58:43,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:58:43,735 INFO L225 Difference]: With dead ends: 52 [2022-03-19 04:58:43,735 INFO L226 Difference]: Without dead ends: 38 [2022-03-19 04:58:43,736 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 04:58:43,738 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:58:43,738 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 107 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:58:43,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-19 04:58:43,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-03-19 04:58:43,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 04:58:43,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2022-03-19 04:58:43,744 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2022-03-19 04:58:43,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:58:43,744 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2022-03-19 04:58:43,744 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 04:58:43,744 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2022-03-19 04:58:43,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-19 04:58:43,745 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:58:43,745 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:58:43,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 04:58:43,964 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:58:43,964 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:58:43,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:58:43,965 INFO L85 PathProgramCache]: Analyzing trace with hash -784889968, now seen corresponding path program 1 times [2022-03-19 04:58:43,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:58:43,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [356073111] [2022-03-19 04:58:43,965 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:58:43,965 INFO L85 PathProgramCache]: Analyzing trace with hash -784889968, now seen corresponding path program 2 times [2022-03-19 04:58:43,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:58:43,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506162297] [2022-03-19 04:58:43,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:58:43,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:58:43,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 04:58:44,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 04:58:44,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 04:58:44,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 04:58:44,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 04:58:44,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-03-19 04:58:44,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 04:58:44,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 04:58:44,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:58:44,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506162297] [2022-03-19 04:58:44,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506162297] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:58:44,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:58:44,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 04:58:44,051 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:58:44,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [356073111] [2022-03-19 04:58:44,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [356073111] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:58:44,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:58:44,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 04:58:44,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198844622] [2022-03-19 04:58:44,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:58:44,052 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 04:58:44,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:58:44,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 04:58:44,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-19 04:58:44,053 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 04:58:44,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:58:44,200 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2022-03-19 04:58:44,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 04:58:44,204 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-03-19 04:58:44,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:58:44,206 INFO L225 Difference]: With dead ends: 52 [2022-03-19 04:58:44,206 INFO L226 Difference]: Without dead ends: 50 [2022-03-19 04:58:44,207 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-19 04:58:44,211 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 23 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:58:44,212 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 89 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:58:44,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-19 04:58:44,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2022-03-19 04:58:44,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 04:58:44,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2022-03-19 04:58:44,225 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2022-03-19 04:58:44,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:58:44,225 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2022-03-19 04:58:44,225 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 04:58:44,225 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2022-03-19 04:58:44,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-19 04:58:44,225 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:58:44,225 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:58:44,226 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-19 04:58:44,226 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:58:44,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:58:44,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1024624683, now seen corresponding path program 1 times [2022-03-19 04:58:44,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:58:44,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [329023668] [2022-03-19 04:58:44,226 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:58:44,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1024624683, now seen corresponding path program 2 times [2022-03-19 04:58:44,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:58:44,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919848536] [2022-03-19 04:58:44,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:58:44,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:58:44,234 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:58:44,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1260082349] [2022-03-19 04:58:44,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:58:44,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:58:44,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:58:44,238 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) [2022-03-19 04:58:44,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 04:58:44,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:58:44,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:58:44,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 04:58:44,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:58:44,359 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:58:44,359 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 04:58:44,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:58:44,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919848536] [2022-03-19 04:58:44,360 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:58:44,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260082349] [2022-03-19 04:58:44,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260082349] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:58:44,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:58:44,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 04:58:44,360 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:58:44,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [329023668] [2022-03-19 04:58:44,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [329023668] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:58:44,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:58:44,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 04:58:44,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061426506] [2022-03-19 04:58:44,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:58:44,361 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 04:58:44,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:58:44,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 04:58:44,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 04:58:44,361 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 04:58:44,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:58:44,396 INFO L93 Difference]: Finished difference Result 71 states and 93 transitions. [2022-03-19 04:58:44,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 04:58:44,397 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-03-19 04:58:44,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:58:44,397 INFO L225 Difference]: With dead ends: 71 [2022-03-19 04:58:44,398 INFO L226 Difference]: Without dead ends: 56 [2022-03-19 04:58:44,398 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 04:58:44,398 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 10 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:58:44,399 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 154 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:58:44,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-19 04:58:44,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-03-19 04:58:44,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 35 states have internal predecessors, (41), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 04:58:44,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2022-03-19 04:58:44,406 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 28 [2022-03-19 04:58:44,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:58:44,406 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2022-03-19 04:58:44,406 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 04:58:44,406 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2022-03-19 04:58:44,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-19 04:58:44,407 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:58:44,407 INFO L500 BasicCegarLoop]: trace histogram [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] [2022-03-19 04:58:44,425 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-19 04:58:44,615 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:58:44,616 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:58:44,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:58:44,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1301357193, now seen corresponding path program 1 times [2022-03-19 04:58:44,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:58:44,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [598793238] [2022-03-19 04:58:44,616 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:58:44,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1301357193, now seen corresponding path program 2 times [2022-03-19 04:58:44,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:58:44,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994332442] [2022-03-19 04:58:44,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:58:44,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:58:44,633 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:58:44,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1852178356] [2022-03-19 04:58:44,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:58:44,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:58:44,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:58:44,636 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) [2022-03-19 04:58:44,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 04:58:44,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:58:44,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:58:44,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 04:58:44,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:58:44,760 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 04:58:44,761 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 04:58:44,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:58:44,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994332442] [2022-03-19 04:58:44,761 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:58:44,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852178356] [2022-03-19 04:58:44,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852178356] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:58:44,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:58:44,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 04:58:44,761 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:58:44,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [598793238] [2022-03-19 04:58:44,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [598793238] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:58:44,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:58:44,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 04:58:44,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129884710] [2022-03-19 04:58:44,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:58:44,762 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 04:58:44,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:58:44,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 04:58:44,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-19 04:58:44,762 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-19 04:58:44,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:58:44,789 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2022-03-19 04:58:44,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 04:58:44,790 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), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2022-03-19 04:58:44,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:58:44,790 INFO L225 Difference]: With dead ends: 76 [2022-03-19 04:58:44,790 INFO L226 Difference]: Without dead ends: 69 [2022-03-19 04:58:44,791 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-19 04:58:44,791 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:58:44,791 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 117 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:58:44,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-19 04:58:44,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2022-03-19 04:58:44,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 44 states have internal predecessors, (49), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 04:58:44,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2022-03-19 04:58:44,803 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 36 [2022-03-19 04:58:44,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:58:44,803 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2022-03-19 04:58:44,803 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), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-19 04:58:44,803 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2022-03-19 04:58:44,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-19 04:58:44,804 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:58:44,804 INFO L500 BasicCegarLoop]: trace histogram [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] [2022-03-19 04:58:44,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 04:58:45,032 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:58:45,033 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:58:45,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:58:45,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1303085071, now seen corresponding path program 1 times [2022-03-19 04:58:45,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:58:45,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [960459695] [2022-03-19 04:58:45,034 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:58:45,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1303085071, now seen corresponding path program 2 times [2022-03-19 04:58:45,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:58:45,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439625627] [2022-03-19 04:58:45,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:58:45,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:58:45,041 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:58:45,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [633957155] [2022-03-19 04:58:45,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:58:45,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:58:45,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:58:45,049 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) [2022-03-19 04:58:45,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 04:58:45,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:58:45,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:58:45,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 04:58:45,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:58:45,192 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 04:58:45,193 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 04:58:45,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:58:45,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439625627] [2022-03-19 04:58:45,193 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:58:45,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633957155] [2022-03-19 04:58:45,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633957155] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:58:45,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:58:45,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 04:58:45,194 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:58:45,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [960459695] [2022-03-19 04:58:45,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [960459695] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:58:45,194 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:58:45,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 04:58:45,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594747369] [2022-03-19 04:58:45,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:58:45,194 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 04:58:45,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:58:45,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 04:58:45,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 04:58:45,195 INFO L87 Difference]: Start difference. First operand 68 states and 78 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 04:58:45,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:58:45,273 INFO L93 Difference]: Finished difference Result 82 states and 97 transitions. [2022-03-19 04:58:45,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 04:58:45,273 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2022-03-19 04:58:45,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:58:45,275 INFO L225 Difference]: With dead ends: 82 [2022-03-19 04:58:45,275 INFO L226 Difference]: Without dead ends: 70 [2022-03-19 04:58:45,276 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 04:58:45,277 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 11 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:58:45,277 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 126 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:58:45,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-19 04:58:45,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2022-03-19 04:58:45,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 45 states have internal predecessors, (52), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-19 04:58:45,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2022-03-19 04:58:45,300 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 36 [2022-03-19 04:58:45,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:58:45,301 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2022-03-19 04:58:45,301 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 04:58:45,301 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2022-03-19 04:58:45,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-19 04:58:45,302 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:58:45,302 INFO L500 BasicCegarLoop]: trace histogram [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] [2022-03-19 04:58:45,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 04:58:45,515 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:58:45,515 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:58:45,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:58:45,516 INFO L85 PathProgramCache]: Analyzing trace with hash 817878903, now seen corresponding path program 1 times [2022-03-19 04:58:45,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:58:45,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [957238233] [2022-03-19 04:58:45,532 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 04:58:45,532 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 04:58:45,532 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 04:58:45,532 INFO L85 PathProgramCache]: Analyzing trace with hash 817878903, now seen corresponding path program 2 times [2022-03-19 04:58:45,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:58:45,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220047947] [2022-03-19 04:58:45,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:58:45,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:58:45,540 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:58:45,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1260685020] [2022-03-19 04:58:45,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:58:45,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:58:45,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:58:45,542 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) [2022-03-19 04:58:45,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 04:58:45,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:58:45,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:58:45,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 04:58:45,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:58:45,659 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-19 04:58:45,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:58:45,749 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 04:58:45,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:58:45,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220047947] [2022-03-19 04:58:45,750 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:58:45,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260685020] [2022-03-19 04:58:45,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260685020] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:58:45,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:58:45,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-19 04:58:45,751 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:58:45,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [957238233] [2022-03-19 04:58:45,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [957238233] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:58:45,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:58:45,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 04:58:45,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490583137] [2022-03-19 04:58:45,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:58:45,751 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 04:58:45,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:58:45,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 04:58:45,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-19 04:58:45,752 INFO L87 Difference]: Start difference. First operand 69 states and 82 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-19 04:58:45,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:58:45,783 INFO L93 Difference]: Finished difference Result 96 states and 120 transitions. [2022-03-19 04:58:45,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 04:58:45,783 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 43 [2022-03-19 04:58:45,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:58:45,785 INFO L225 Difference]: With dead ends: 96 [2022-03-19 04:58:45,785 INFO L226 Difference]: Without dead ends: 71 [2022-03-19 04:58:45,785 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-19 04:58:45,786 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:58:45,786 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 138 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:58:45,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-19 04:58:45,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-03-19 04:58:45,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 45 states have (on average 1.2) internal successors, (54), 47 states have internal predecessors, (54), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-19 04:58:45,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 84 transitions. [2022-03-19 04:58:45,795 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 84 transitions. Word has length 43 [2022-03-19 04:58:45,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:58:45,795 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 84 transitions. [2022-03-19 04:58:45,795 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-19 04:58:45,795 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 84 transitions. [2022-03-19 04:58:45,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-19 04:58:45,796 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:58:45,796 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:58:45,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 04:58:46,029 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:58:46,029 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:58:46,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:58:46,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1861890039, now seen corresponding path program 1 times [2022-03-19 04:58:46,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:58:46,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1542542137] [2022-03-19 04:58:46,034 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 04:58:46,034 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 04:58:46,035 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 04:58:46,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1861890039, now seen corresponding path program 2 times [2022-03-19 04:58:46,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:58:46,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380527163] [2022-03-19 04:58:46,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:58:46,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:58:46,042 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:58:46,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [186117824] [2022-03-19 04:58:46,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:58:46,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:58:46,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:58:46,043 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) [2022-03-19 04:58:46,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 04:58:46,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:58:46,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:58:46,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-19 04:58:46,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:58:46,295 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-19 04:58:46,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:58:46,394 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-19 04:58:46,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:58:46,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380527163] [2022-03-19 04:58:46,394 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:58:46,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186117824] [2022-03-19 04:58:46,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186117824] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-19 04:58:46,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 04:58:46,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-03-19 04:58:46,395 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:58:46,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1542542137] [2022-03-19 04:58:46,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1542542137] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:58:46,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:58:46,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 04:58:46,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417073423] [2022-03-19 04:58:46,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:58:46,397 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 04:58:46,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:58:46,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 04:58:46,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-19 04:58:46,398 INFO L87 Difference]: Start difference. First operand 71 states and 84 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 04:58:46,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:58:46,475 INFO L93 Difference]: Finished difference Result 84 states and 101 transitions. [2022-03-19 04:58:46,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 04:58:46,475 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 46 [2022-03-19 04:58:46,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:58:46,476 INFO L225 Difference]: With dead ends: 84 [2022-03-19 04:58:46,476 INFO L226 Difference]: Without dead ends: 82 [2022-03-19 04:58:46,477 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-19 04:58:46,477 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 11 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:58:46,477 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 136 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:58:46,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-03-19 04:58:46,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2022-03-19 04:58:46,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 50 states have (on average 1.2) internal successors, (60), 53 states have internal predecessors, (60), 18 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-19 04:58:46,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 94 transitions. [2022-03-19 04:58:46,489 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 94 transitions. Word has length 46 [2022-03-19 04:58:46,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:58:46,490 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 94 transitions. [2022-03-19 04:58:46,490 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 04:58:46,490 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 94 transitions. [2022-03-19 04:58:46,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-19 04:58:46,493 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:58:46,493 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 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] [2022-03-19 04:58:46,537 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-19 04:58:46,707 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:58:46,708 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:58:46,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:58:46,708 INFO L85 PathProgramCache]: Analyzing trace with hash 967982746, now seen corresponding path program 1 times [2022-03-19 04:58:46,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:58:46,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1078620390] [2022-03-19 04:58:46,712 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 04:58:46,712 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 04:58:46,712 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 04:58:46,712 INFO L85 PathProgramCache]: Analyzing trace with hash 967982746, now seen corresponding path program 2 times [2022-03-19 04:58:46,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:58:46,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311375471] [2022-03-19 04:58:46,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:58:46,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:58:46,719 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:58:46,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1731431569] [2022-03-19 04:58:46,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:58:46,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:58:46,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:58:46,725 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) [2022-03-19 04:58:46,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 04:58:46,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:58:46,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:58:46,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 04:58:46,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:58:46,867 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 42 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-19 04:58:46,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:58:46,954 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-19 04:58:46,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:58:46,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311375471] [2022-03-19 04:58:46,955 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:58:46,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731431569] [2022-03-19 04:58:46,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731431569] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:58:46,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:58:46,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-19 04:58:46,955 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:58:46,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1078620390] [2022-03-19 04:58:46,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1078620390] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:58:46,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:58:46,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 04:58:46,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846943589] [2022-03-19 04:58:46,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:58:46,956 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 04:58:46,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:58:46,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 04:58:46,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-19 04:58:46,957 INFO L87 Difference]: Start difference. First operand 79 states and 94 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2022-03-19 04:58:47,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:58:47,011 INFO L93 Difference]: Finished difference Result 110 states and 126 transitions. [2022-03-19 04:58:47,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 04:58:47,012 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) Word has length 59 [2022-03-19 04:58:47,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:58:47,015 INFO L225 Difference]: With dead ends: 110 [2022-03-19 04:58:47,015 INFO L226 Difference]: Without dead ends: 98 [2022-03-19 04:58:47,016 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-19 04:58:47,016 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 14 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:58:47,017 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 128 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:58:47,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-19 04:58:47,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2022-03-19 04:58:47,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 62 states have (on average 1.1774193548387097) internal successors, (73), 65 states have internal predecessors, (73), 21 states have call successors, (21), 14 states have call predecessors, (21), 13 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-19 04:58:47,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2022-03-19 04:58:47,036 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 59 [2022-03-19 04:58:47,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:58:47,036 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2022-03-19 04:58:47,036 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2022-03-19 04:58:47,037 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2022-03-19 04:58:47,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-19 04:58:47,039 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:58:47,039 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:58:47,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-19 04:58:47,268 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:58:47,269 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:58:47,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:58:47,269 INFO L85 PathProgramCache]: Analyzing trace with hash 940283669, now seen corresponding path program 3 times [2022-03-19 04:58:47,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:58:47,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1165870975] [2022-03-19 04:58:47,274 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 04:58:47,274 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 04:58:47,274 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 04:58:47,274 INFO L85 PathProgramCache]: Analyzing trace with hash 940283669, now seen corresponding path program 4 times [2022-03-19 04:58:47,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:58:47,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26130070] [2022-03-19 04:58:47,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:58:47,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:58:47,282 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:58:47,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1354772664] [2022-03-19 04:58:47,282 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:58:47,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:58:47,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:58:47,283 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) [2022-03-19 04:58:47,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 04:58:47,330 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:58:47,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:58:47,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 04:58:47,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:58:47,422 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 36 proven. 46 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-19 04:58:47,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:58:47,519 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-19 04:58:47,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:58:47,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26130070] [2022-03-19 04:58:47,519 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:58:47,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354772664] [2022-03-19 04:58:47,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354772664] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:58:47,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:58:47,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-19 04:58:47,520 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:58:47,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1165870975] [2022-03-19 04:58:47,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1165870975] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:58:47,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:58:47,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 04:58:47,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987446502] [2022-03-19 04:58:47,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:58:47,521 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 04:58:47,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:58:47,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 04:58:47,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-19 04:58:47,522 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2022-03-19 04:58:47,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:58:47,562 INFO L93 Difference]: Finished difference Result 132 states and 161 transitions. [2022-03-19 04:58:47,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 04:58:47,562 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) Word has length 61 [2022-03-19 04:58:47,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:58:47,564 INFO L225 Difference]: With dead ends: 132 [2022-03-19 04:58:47,564 INFO L226 Difference]: Without dead ends: 99 [2022-03-19 04:58:47,565 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-03-19 04:58:47,565 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 7 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:58:47,565 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 146 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:58:47,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-03-19 04:58:47,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-03-19 04:58:47,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 64 states have (on average 1.171875) internal successors, (75), 67 states have internal predecessors, (75), 21 states have call successors, (21), 14 states have call predecessors, (21), 13 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-19 04:58:47,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 115 transitions. [2022-03-19 04:58:47,575 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 115 transitions. Word has length 61 [2022-03-19 04:58:47,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:58:47,575 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 115 transitions. [2022-03-19 04:58:47,575 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2022-03-19 04:58:47,575 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 115 transitions. [2022-03-19 04:58:47,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-19 04:58:47,576 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:58:47,576 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 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] [2022-03-19 04:58:47,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-19 04:58:47,789 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,SelfDestructingSolverStorable10 [2022-03-19 04:58:47,789 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:58:47,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:58:47,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1140868055, now seen corresponding path program 1 times [2022-03-19 04:58:47,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:58:47,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1986018127] [2022-03-19 04:58:47,793 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 04:58:47,793 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 04:58:47,793 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 04:58:47,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1140868055, now seen corresponding path program 2 times [2022-03-19 04:58:47,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:58:47,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601963682] [2022-03-19 04:58:47,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:58:47,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:58:47,801 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:58:47,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1823984035] [2022-03-19 04:58:47,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:58:47,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:58:47,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:58:47,803 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) [2022-03-19 04:58:47,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 04:58:47,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:58:47,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:58:47,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-19 04:58:47,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:58:48,000 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 16 proven. 92 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-19 04:58:48,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:58:48,129 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-19 04:58:48,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:58:48,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601963682] [2022-03-19 04:58:48,129 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:58:48,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823984035] [2022-03-19 04:58:48,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823984035] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:58:48,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:58:48,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-03-19 04:58:48,129 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:58:48,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1986018127] [2022-03-19 04:58:48,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1986018127] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:58:48,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:58:48,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 04:58:48,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047514131] [2022-03-19 04:58:48,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:58:48,130 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 04:58:48,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:58:48,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 04:58:48,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-03-19 04:58:48,130 INFO L87 Difference]: Start difference. First operand 99 states and 115 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-03-19 04:58:48,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:58:48,190 INFO L93 Difference]: Finished difference Result 151 states and 174 transitions. [2022-03-19 04:58:48,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 04:58:48,191 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 68 [2022-03-19 04:58:48,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:58:48,192 INFO L225 Difference]: With dead ends: 151 [2022-03-19 04:58:48,192 INFO L226 Difference]: Without dead ends: 136 [2022-03-19 04:58:48,192 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2022-03-19 04:58:48,193 INFO L912 BasicCegarLoop]: 53 mSDtfsCounter, 27 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:58:48,193 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 184 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:58:48,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-03-19 04:58:48,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 133. [2022-03-19 04:58:48,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 87 states have (on average 1.160919540229885) internal successors, (101), 90 states have internal predecessors, (101), 28 states have call successors, (28), 19 states have call predecessors, (28), 17 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-19 04:58:48,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 154 transitions. [2022-03-19 04:58:48,204 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 154 transitions. Word has length 68 [2022-03-19 04:58:48,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:58:48,204 INFO L478 AbstractCegarLoop]: Abstraction has 133 states and 154 transitions. [2022-03-19 04:58:48,204 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-03-19 04:58:48,204 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 154 transitions. [2022-03-19 04:58:48,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-19 04:58:48,205 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:58:48,205 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:58:48,228 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-19 04:58:48,419 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:58:48,419 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:58:48,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:58:48,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1142595933, now seen corresponding path program 1 times [2022-03-19 04:58:48,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:58:48,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1788570751] [2022-03-19 04:58:48,423 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 04:58:48,424 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 04:58:48,424 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 04:58:48,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1142595933, now seen corresponding path program 2 times [2022-03-19 04:58:48,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:58:48,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276466872] [2022-03-19 04:58:48,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:58:48,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:58:48,430 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:58:48,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1634100325] [2022-03-19 04:58:48,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:58:48,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:58:48,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:58:48,431 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) [2022-03-19 04:58:48,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-19 04:58:48,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:58:48,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:58:48,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-19 04:58:48,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:58:48,957 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-19 04:58:48,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:58:51,440 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-19 04:58:51,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:58:51,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276466872] [2022-03-19 04:58:51,441 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:58:51,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634100325] [2022-03-19 04:58:51,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634100325] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:58:51,441 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:58:51,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-03-19 04:58:51,441 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:58:51,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1788570751] [2022-03-19 04:58:51,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1788570751] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:58:51,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:58:51,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 04:58:51,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428035517] [2022-03-19 04:58:51,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:58:51,443 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 04:58:51,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:58:51,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 04:58:51,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-19 04:58:51,443 INFO L87 Difference]: Start difference. First operand 133 states and 154 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-19 04:58:51,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:58:51,669 INFO L93 Difference]: Finished difference Result 178 states and 213 transitions. [2022-03-19 04:58:51,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 04:58:51,670 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 68 [2022-03-19 04:58:51,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:58:51,671 INFO L225 Difference]: With dead ends: 178 [2022-03-19 04:58:51,671 INFO L226 Difference]: Without dead ends: 143 [2022-03-19 04:58:51,672 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-03-19 04:58:51,672 INFO L912 BasicCegarLoop]: 50 mSDtfsCounter, 12 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:58:51,673 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 306 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:58:51,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-03-19 04:58:51,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 141. [2022-03-19 04:58:51,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 93 states have (on average 1.1612903225806452) internal successors, (108), 96 states have internal predecessors, (108), 28 states have call successors, (28), 20 states have call predecessors, (28), 19 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-19 04:58:51,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 162 transitions. [2022-03-19 04:58:51,686 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 162 transitions. Word has length 68 [2022-03-19 04:58:51,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:58:51,686 INFO L478 AbstractCegarLoop]: Abstraction has 141 states and 162 transitions. [2022-03-19 04:58:51,686 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-19 04:58:51,686 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 162 transitions. [2022-03-19 04:58:51,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-19 04:58:51,687 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:58:51,687 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:58:51,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-19 04:58:51,910 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,SelfDestructingSolverStorable12 [2022-03-19 04:58:51,911 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:58:51,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:58:51,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1390565976, now seen corresponding path program 3 times [2022-03-19 04:58:51,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:58:51,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [446151747] [2022-03-19 04:58:51,914 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 04:58:51,914 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 04:58:51,914 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 04:58:51,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1390565976, now seen corresponding path program 4 times [2022-03-19 04:58:51,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:58:51,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659850681] [2022-03-19 04:58:51,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:58:51,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:58:51,921 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:58:51,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1752592902] [2022-03-19 04:58:51,921 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:58:51,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:58:51,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:58:51,929 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) [2022-03-19 04:58:51,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-19 04:58:51,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:58:51,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:58:51,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-19 04:58:51,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:58:52,992 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 41 proven. 11 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-03-19 04:58:52,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:58:59,061 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 41 proven. 11 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-03-19 04:58:59,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:58:59,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659850681] [2022-03-19 04:58:59,062 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:58:59,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752592902] [2022-03-19 04:58:59,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752592902] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:58:59,062 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:58:59,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-03-19 04:58:59,062 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:58:59,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [446151747] [2022-03-19 04:58:59,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [446151747] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:58:59,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:58:59,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 04:58:59,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961189088] [2022-03-19 04:58:59,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:58:59,063 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 04:58:59,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:58:59,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 04:58:59,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-03-19 04:58:59,063 INFO L87 Difference]: Start difference. First operand 141 states and 162 transitions. Second operand has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-03-19 04:58:59,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:58:59,555 INFO L93 Difference]: Finished difference Result 149 states and 171 transitions. [2022-03-19 04:58:59,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 04:58:59,555 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 73 [2022-03-19 04:58:59,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:58:59,556 INFO L225 Difference]: With dead ends: 149 [2022-03-19 04:58:59,557 INFO L226 Difference]: Without dead ends: 147 [2022-03-19 04:58:59,557 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-03-19 04:58:59,557 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 14 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 04:58:59,557 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 284 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 216 Invalid, 0 Unknown, 34 Unchecked, 0.3s Time] [2022-03-19 04:58:59,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-03-19 04:58:59,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2022-03-19 04:58:59,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 96 states have (on average 1.15625) internal successors, (111), 100 states have internal predecessors, (111), 30 states have call successors, (30), 21 states have call predecessors, (30), 20 states have return successors, (28), 25 states have call predecessors, (28), 28 states have call successors, (28) [2022-03-19 04:58:59,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 169 transitions. [2022-03-19 04:58:59,568 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 169 transitions. Word has length 73 [2022-03-19 04:58:59,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:58:59,568 INFO L478 AbstractCegarLoop]: Abstraction has 147 states and 169 transitions. [2022-03-19 04:58:59,568 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-03-19 04:58:59,568 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 169 transitions. [2022-03-19 04:58:59,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-19 04:58:59,569 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:58:59,569 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:58:59,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-19 04:58:59,785 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,SelfDestructingSolverStorable13 [2022-03-19 04:58:59,786 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:58:59,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:58:59,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1792978632, now seen corresponding path program 1 times [2022-03-19 04:58:59,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:58:59,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [678569067] [2022-03-19 04:58:59,789 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 04:58:59,789 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 04:58:59,789 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 04:58:59,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1792978632, now seen corresponding path program 2 times [2022-03-19 04:58:59,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:58:59,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968228655] [2022-03-19 04:58:59,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:58:59,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:58:59,798 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:58:59,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2102594608] [2022-03-19 04:58:59,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:58:59,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:58:59,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:58:59,809 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) [2022-03-19 04:58:59,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-19 04:58:59,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:58:59,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:58:59,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-19 04:58:59,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:59:00,092 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:59:00,094 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:59:00,896 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 66 proven. 7 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2022-03-19 04:59:00,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:59:01,206 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:59:01,209 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:59:01,373 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2022-03-19 04:59:01,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:59:01,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968228655] [2022-03-19 04:59:01,373 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:59:01,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102594608] [2022-03-19 04:59:01,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102594608] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:59:01,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:59:01,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2022-03-19 04:59:01,374 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:59:01,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [678569067] [2022-03-19 04:59:01,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [678569067] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:59:01,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:59:01,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 04:59:01,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320922033] [2022-03-19 04:59:01,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:59:01,374 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 04:59:01,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:59:01,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 04:59:01,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-03-19 04:59:01,375 INFO L87 Difference]: Start difference. First operand 147 states and 169 transitions. Second operand has 11 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-19 04:59:09,493 WARN L232 SmtUtils]: Spent 7.67s on a formula simplification. DAG size of input: 59 DAG size of output: 56 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 04:59:09,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:59:09,670 INFO L93 Difference]: Finished difference Result 164 states and 192 transitions. [2022-03-19 04:59:09,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 04:59:09,670 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 79 [2022-03-19 04:59:09,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:59:09,671 INFO L225 Difference]: With dead ends: 164 [2022-03-19 04:59:09,671 INFO L226 Difference]: Without dead ends: 162 [2022-03-19 04:59:09,671 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 143 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-03-19 04:59:09,672 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 16 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 04:59:09,672 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 318 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 212 Invalid, 0 Unknown, 27 Unchecked, 0.4s Time] [2022-03-19 04:59:09,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-03-19 04:59:09,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 158. [2022-03-19 04:59:09,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 103 states have (on average 1.174757281553398) internal successors, (121), 107 states have internal predecessors, (121), 33 states have call successors, (33), 22 states have call predecessors, (33), 21 states have return successors, (31), 28 states have call predecessors, (31), 31 states have call successors, (31) [2022-03-19 04:59:09,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 185 transitions. [2022-03-19 04:59:09,686 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 185 transitions. Word has length 79 [2022-03-19 04:59:09,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:59:09,687 INFO L478 AbstractCegarLoop]: Abstraction has 158 states and 185 transitions. [2022-03-19 04:59:09,687 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-19 04:59:09,687 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 185 transitions. [2022-03-19 04:59:09,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-19 04:59:09,688 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:59:09,689 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:59:09,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-19 04:59:09,899 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,SelfDestructingSolverStorable14 [2022-03-19 04:59:09,899 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:59:09,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:59:09,900 INFO L85 PathProgramCache]: Analyzing trace with hash 816704307, now seen corresponding path program 5 times [2022-03-19 04:59:09,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:59:09,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1855975869] [2022-03-19 04:59:09,903 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 04:59:09,903 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 04:59:09,903 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 04:59:09,903 INFO L85 PathProgramCache]: Analyzing trace with hash 816704307, now seen corresponding path program 6 times [2022-03-19 04:59:09,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:59:09,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261995264] [2022-03-19 04:59:09,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:59:09,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:59:09,916 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:59:09,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [949493915] [2022-03-19 04:59:09,916 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:59:09,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:59:09,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:59:09,928 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) [2022-03-19 04:59:09,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-19 04:59:10,013 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-19 04:59:10,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:59:10,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-19 04:59:10,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:59:10,150 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 54 proven. 132 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-03-19 04:59:10,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:59:10,303 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 20 proven. 24 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-03-19 04:59:10,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:59:10,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261995264] [2022-03-19 04:59:10,304 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:59:10,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949493915] [2022-03-19 04:59:10,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949493915] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:59:10,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:59:10,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-03-19 04:59:10,304 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:59:10,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1855975869] [2022-03-19 04:59:10,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1855975869] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:59:10,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:59:10,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 04:59:10,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713620443] [2022-03-19 04:59:10,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:59:10,305 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 04:59:10,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:59:10,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 04:59:10,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-03-19 04:59:10,305 INFO L87 Difference]: Start difference. First operand 158 states and 185 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 6 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2022-03-19 04:59:10,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:59:10,382 INFO L93 Difference]: Finished difference Result 203 states and 247 transitions. [2022-03-19 04:59:10,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 04:59:10,382 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 6 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) Word has length 79 [2022-03-19 04:59:10,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:59:10,384 INFO L225 Difference]: With dead ends: 203 [2022-03-19 04:59:10,384 INFO L226 Difference]: Without dead ends: 160 [2022-03-19 04:59:10,384 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-03-19 04:59:10,385 INFO L912 BasicCegarLoop]: 50 mSDtfsCounter, 28 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:59:10,385 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 148 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:59:10,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-03-19 04:59:10,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2022-03-19 04:59:10,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 105 states have (on average 1.1714285714285715) internal successors, (123), 109 states have internal predecessors, (123), 33 states have call successors, (33), 22 states have call predecessors, (33), 21 states have return successors, (31), 28 states have call predecessors, (31), 31 states have call successors, (31) [2022-03-19 04:59:10,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 187 transitions. [2022-03-19 04:59:10,401 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 187 transitions. Word has length 79 [2022-03-19 04:59:10,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:59:10,401 INFO L478 AbstractCegarLoop]: Abstraction has 160 states and 187 transitions. [2022-03-19 04:59:10,401 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 6 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2022-03-19 04:59:10,401 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 187 transitions. [2022-03-19 04:59:10,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-03-19 04:59:10,403 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:59:10,403 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:59:10,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-19 04:59:10,620 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,SelfDestructingSolverStorable15 [2022-03-19 04:59:10,620 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:59:10,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:59:10,621 INFO L85 PathProgramCache]: Analyzing trace with hash 435352067, now seen corresponding path program 3 times [2022-03-19 04:59:10,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:59:10,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [948638147] [2022-03-19 04:59:10,623 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 04:59:10,623 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 04:59:10,623 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 04:59:10,623 INFO L85 PathProgramCache]: Analyzing trace with hash 435352067, now seen corresponding path program 4 times [2022-03-19 04:59:10,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:59:10,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844129059] [2022-03-19 04:59:10,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:59:10,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:59:10,630 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:59:10,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [892048517] [2022-03-19 04:59:10,630 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:59:10,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:59:10,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:59:10,631 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) [2022-03-19 04:59:10,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-19 04:59:10,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:59:10,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:59:10,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 04:59:10,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:59:10,814 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 20 proven. 164 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-03-19 04:59:10,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:59:10,971 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-03-19 04:59:10,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:59:10,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844129059] [2022-03-19 04:59:10,972 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:59:10,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892048517] [2022-03-19 04:59:10,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892048517] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:59:10,972 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:59:10,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-19 04:59:10,972 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:59:10,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [948638147] [2022-03-19 04:59:10,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [948638147] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:59:10,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:59:10,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 04:59:10,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292989070] [2022-03-19 04:59:10,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:59:10,973 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 04:59:10,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:59:10,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 04:59:10,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-19 04:59:10,973 INFO L87 Difference]: Start difference. First operand 160 states and 187 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 7 states have call successors, (14), 7 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2022-03-19 04:59:11,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:59:11,136 INFO L93 Difference]: Finished difference Result 226 states and 262 transitions. [2022-03-19 04:59:11,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 04:59:11,139 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 7 states have call successors, (14), 7 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) Word has length 82 [2022-03-19 04:59:11,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:59:11,141 INFO L225 Difference]: With dead ends: 226 [2022-03-19 04:59:11,141 INFO L226 Difference]: Without dead ends: 211 [2022-03-19 04:59:11,141 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-03-19 04:59:11,141 INFO L912 BasicCegarLoop]: 58 mSDtfsCounter, 36 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:59:11,142 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 217 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:59:11,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-03-19 04:59:11,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 208. [2022-03-19 04:59:11,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 139 states have (on average 1.158273381294964) internal successors, (161), 144 states have internal predecessors, (161), 41 states have call successors, (41), 29 states have call predecessors, (41), 27 states have return successors, (38), 34 states have call predecessors, (38), 38 states have call successors, (38) [2022-03-19 04:59:11,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 240 transitions. [2022-03-19 04:59:11,167 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 240 transitions. Word has length 82 [2022-03-19 04:59:11,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:59:11,167 INFO L478 AbstractCegarLoop]: Abstraction has 208 states and 240 transitions. [2022-03-19 04:59:11,167 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 7 states have call successors, (14), 7 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2022-03-19 04:59:11,167 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 240 transitions. [2022-03-19 04:59:11,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-03-19 04:59:11,168 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:59:11,168 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:59:11,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-19 04:59:11,375 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:59:11,376 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:59:11,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:59:11,376 INFO L85 PathProgramCache]: Analyzing trace with hash 437079945, now seen corresponding path program 5 times [2022-03-19 04:59:11,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:59:11,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [893538890] [2022-03-19 04:59:11,379 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 04:59:11,379 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 04:59:11,379 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 04:59:11,379 INFO L85 PathProgramCache]: Analyzing trace with hash 437079945, now seen corresponding path program 6 times [2022-03-19 04:59:11,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:59:11,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221301238] [2022-03-19 04:59:11,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:59:11,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:59:11,387 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:59:11,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1958224303] [2022-03-19 04:59:11,387 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:59:11,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:59:11,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:59:11,402 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) [2022-03-19 04:59:11,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-19 04:59:11,459 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 04:59:11,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:59:11,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 04:59:11,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:59:11,553 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-03-19 04:59:11,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:59:11,683 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-03-19 04:59:11,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:59:11,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221301238] [2022-03-19 04:59:11,684 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:59:11,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958224303] [2022-03-19 04:59:11,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958224303] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:59:11,684 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:59:11,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2022-03-19 04:59:11,684 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:59:11,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [893538890] [2022-03-19 04:59:11,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [893538890] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:59:11,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:59:11,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 04:59:11,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602467870] [2022-03-19 04:59:11,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:59:11,685 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 04:59:11,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:59:11,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 04:59:11,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-19 04:59:11,685 INFO L87 Difference]: Start difference. First operand 208 states and 240 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-03-19 04:59:11,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:59:11,770 INFO L93 Difference]: Finished difference Result 225 states and 264 transitions. [2022-03-19 04:59:11,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 04:59:11,772 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 82 [2022-03-19 04:59:11,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:59:11,774 INFO L225 Difference]: With dead ends: 225 [2022-03-19 04:59:11,774 INFO L226 Difference]: Without dead ends: 196 [2022-03-19 04:59:11,774 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-19 04:59:11,774 INFO L912 BasicCegarLoop]: 58 mSDtfsCounter, 1 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:59:11,774 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 140 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:59:11,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-03-19 04:59:11,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 193. [2022-03-19 04:59:11,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 127 states have (on average 1.1338582677165354) internal successors, (144), 132 states have internal predecessors, (144), 39 states have call successors, (39), 28 states have call predecessors, (39), 26 states have return successors, (36), 32 states have call predecessors, (36), 36 states have call successors, (36) [2022-03-19 04:59:11,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 219 transitions. [2022-03-19 04:59:11,791 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 219 transitions. Word has length 82 [2022-03-19 04:59:11,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:59:11,791 INFO L478 AbstractCegarLoop]: Abstraction has 193 states and 219 transitions. [2022-03-19 04:59:11,791 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-03-19 04:59:11,791 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 219 transitions. [2022-03-19 04:59:11,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-03-19 04:59:11,792 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:59:11,792 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:59:11,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-19 04:59:12,003 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,SelfDestructingSolverStorable17 [2022-03-19 04:59:12,004 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:59:12,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:59:12,004 INFO L85 PathProgramCache]: Analyzing trace with hash 111833757, now seen corresponding path program 1 times [2022-03-19 04:59:12,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:59:12,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [822821763] [2022-03-19 04:59:12,006 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 04:59:12,006 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 04:59:12,006 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 04:59:12,006 INFO L85 PathProgramCache]: Analyzing trace with hash 111833757, now seen corresponding path program 2 times [2022-03-19 04:59:12,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:59:12,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931570141] [2022-03-19 04:59:12,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:59:12,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:59:12,013 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:59:12,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [599338350] [2022-03-19 04:59:12,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:59:12,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:59:12,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:59:12,015 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) [2022-03-19 04:59:12,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-19 04:59:12,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:59:12,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:59:12,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-19 04:59:12,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:59:12,264 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-19 04:59:12,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:59:12,620 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-19 04:59:12,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:59:12,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931570141] [2022-03-19 04:59:12,620 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:59:12,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599338350] [2022-03-19 04:59:12,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599338350] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:59:12,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:59:12,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-03-19 04:59:12,621 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:59:12,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [822821763] [2022-03-19 04:59:12,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [822821763] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:59:12,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:59:12,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 04:59:12,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890645127] [2022-03-19 04:59:12,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:59:12,622 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 04:59:12,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:59:12,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 04:59:12,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-19 04:59:12,622 INFO L87 Difference]: Start difference. First operand 193 states and 219 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-19 04:59:12,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:59:12,768 INFO L93 Difference]: Finished difference Result 198 states and 223 transitions. [2022-03-19 04:59:12,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 04:59:12,769 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 84 [2022-03-19 04:59:12,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:59:12,769 INFO L225 Difference]: With dead ends: 198 [2022-03-19 04:59:12,769 INFO L226 Difference]: Without dead ends: 161 [2022-03-19 04:59:12,770 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-03-19 04:59:12,770 INFO L912 BasicCegarLoop]: 58 mSDtfsCounter, 8 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:59:12,770 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 282 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:59:12,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-03-19 04:59:12,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2022-03-19 04:59:12,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 105 states have (on average 1.1523809523809523) internal successors, (121), 109 states have internal predecessors, (121), 34 states have call successors, (34), 23 states have call predecessors, (34), 21 states have return successors, (31), 28 states have call predecessors, (31), 31 states have call successors, (31) [2022-03-19 04:59:12,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 186 transitions. [2022-03-19 04:59:12,783 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 186 transitions. Word has length 84 [2022-03-19 04:59:12,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:59:12,783 INFO L478 AbstractCegarLoop]: Abstraction has 161 states and 186 transitions. [2022-03-19 04:59:12,783 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-19 04:59:12,783 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 186 transitions. [2022-03-19 04:59:12,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-19 04:59:12,784 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:59:12,784 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:59:12,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-19 04:59:13,002 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:59:13,002 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:59:13,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:59:13,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1068167297, now seen corresponding path program 7 times [2022-03-19 04:59:13,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:59:13,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1414695908] [2022-03-19 04:59:13,005 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 04:59:13,005 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 04:59:13,006 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 04:59:13,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1068167297, now seen corresponding path program 8 times [2022-03-19 04:59:13,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:59:13,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683690493] [2022-03-19 04:59:13,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:59:13,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:59:13,015 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:59:13,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [873632297] [2022-03-19 04:59:13,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:59:13,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:59:13,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:59:13,017 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) [2022-03-19 04:59:13,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-19 04:59:13,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:59:13,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:59:13,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-19 04:59:13,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:59:13,777 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 21 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-19 04:59:13,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:59:20,158 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 21 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-19 04:59:20,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:59:20,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683690493] [2022-03-19 04:59:20,159 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:59:20,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873632297] [2022-03-19 04:59:20,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873632297] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:59:20,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:59:20,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-03-19 04:59:20,159 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:59:20,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1414695908] [2022-03-19 04:59:20,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1414695908] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:59:20,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:59:20,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 04:59:20,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901052216] [2022-03-19 04:59:20,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:59:20,160 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 04:59:20,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:59:20,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 04:59:20,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-03-19 04:59:20,160 INFO L87 Difference]: Start difference. First operand 161 states and 186 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-19 04:59:20,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:59:20,372 INFO L93 Difference]: Finished difference Result 220 states and 267 transitions. [2022-03-19 04:59:20,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 04:59:20,373 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 86 [2022-03-19 04:59:20,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:59:20,374 INFO L225 Difference]: With dead ends: 220 [2022-03-19 04:59:20,374 INFO L226 Difference]: Without dead ends: 175 [2022-03-19 04:59:20,374 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-03-19 04:59:20,374 INFO L912 BasicCegarLoop]: 54 mSDtfsCounter, 12 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:59:20,374 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 332 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:59:20,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-03-19 04:59:20,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 172. [2022-03-19 04:59:20,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 112 states have (on average 1.1607142857142858) internal successors, (130), 116 states have internal predecessors, (130), 36 states have call successors, (36), 24 states have call predecessors, (36), 23 states have return successors, (34), 31 states have call predecessors, (34), 34 states have call successors, (34) [2022-03-19 04:59:20,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 200 transitions. [2022-03-19 04:59:20,385 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 200 transitions. Word has length 86 [2022-03-19 04:59:20,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:59:20,386 INFO L478 AbstractCegarLoop]: Abstraction has 172 states and 200 transitions. [2022-03-19 04:59:20,386 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-19 04:59:20,386 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 200 transitions. [2022-03-19 04:59:20,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-19 04:59:20,386 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:59:20,386 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:59:20,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-19 04:59:20,587 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:59:20,587 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:59:20,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:59:20,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1271087930, now seen corresponding path program 9 times [2022-03-19 04:59:20,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:59:20,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1056385482] [2022-03-19 04:59:20,591 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 04:59:20,591 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 04:59:20,591 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 04:59:20,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1271087930, now seen corresponding path program 10 times [2022-03-19 04:59:20,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:59:20,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746766722] [2022-03-19 04:59:20,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:59:20,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:59:20,596 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:59:20,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1151021302] [2022-03-19 04:59:20,597 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:59:20,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:59:20,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:59:20,598 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) [2022-03-19 04:59:20,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-19 04:59:20,688 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:59:20,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:59:20,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-19 04:59:20,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:59:20,978 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 24 proven. 22 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-19 04:59:20,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:59:22,984 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 24 proven. 22 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-19 04:59:22,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:59:22,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746766722] [2022-03-19 04:59:22,984 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:59:22,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151021302] [2022-03-19 04:59:22,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151021302] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:59:22,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:59:22,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-03-19 04:59:22,985 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:59:22,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1056385482] [2022-03-19 04:59:22,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1056385482] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:59:22,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:59:22,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 04:59:22,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050076173] [2022-03-19 04:59:22,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:59:22,985 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 04:59:22,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:59:22,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 04:59:22,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-03-19 04:59:22,986 INFO L87 Difference]: Start difference. First operand 172 states and 200 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 6 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-19 04:59:23,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:59:23,244 INFO L93 Difference]: Finished difference Result 212 states and 254 transitions. [2022-03-19 04:59:23,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 04:59:23,244 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 6 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 91 [2022-03-19 04:59:23,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:59:23,245 INFO L225 Difference]: With dead ends: 212 [2022-03-19 04:59:23,245 INFO L226 Difference]: Without dead ends: 182 [2022-03-19 04:59:23,246 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2022-03-19 04:59:23,246 INFO L912 BasicCegarLoop]: 68 mSDtfsCounter, 14 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 04:59:23,247 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 440 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 04:59:23,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-03-19 04:59:23,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 180. [2022-03-19 04:59:23,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 117 states have (on average 1.1452991452991452) internal successors, (134), 123 states have internal predecessors, (134), 38 states have call successors, (38), 25 states have call predecessors, (38), 24 states have return successors, (35), 31 states have call predecessors, (35), 35 states have call successors, (35) [2022-03-19 04:59:23,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 207 transitions. [2022-03-19 04:59:23,259 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 207 transitions. Word has length 91 [2022-03-19 04:59:23,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:59:23,260 INFO L478 AbstractCegarLoop]: Abstraction has 180 states and 207 transitions. [2022-03-19 04:59:23,260 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 6 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-19 04:59:23,260 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 207 transitions. [2022-03-19 04:59:23,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-19 04:59:23,260 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:59:23,261 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:59:23,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-19 04:59:23,474 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:59:23,475 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:59:23,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:59:23,475 INFO L85 PathProgramCache]: Analyzing trace with hash 114996177, now seen corresponding path program 7 times [2022-03-19 04:59:23,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:59:23,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [391951903] [2022-03-19 04:59:23,478 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 04:59:23,478 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 04:59:23,478 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 04:59:23,478 INFO L85 PathProgramCache]: Analyzing trace with hash 114996177, now seen corresponding path program 8 times [2022-03-19 04:59:23,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:59:23,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071719168] [2022-03-19 04:59:23,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:59:23,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:59:23,486 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:59:23,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1359522313] [2022-03-19 04:59:23,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:59:23,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:59:23,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:59:23,487 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) [2022-03-19 04:59:23,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-19 04:59:23,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:59:23,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:59:23,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 04:59:23,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:59:23,740 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 72 proven. 260 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-03-19 04:59:23,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:59:23,932 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 26 proven. 44 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-19 04:59:23,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:59:23,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071719168] [2022-03-19 04:59:23,932 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:59:23,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359522313] [2022-03-19 04:59:23,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359522313] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:59:23,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:59:23,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-19 04:59:23,933 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:59:23,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [391951903] [2022-03-19 04:59:23,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [391951903] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:59:23,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:59:23,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 04:59:23,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413324611] [2022-03-19 04:59:23,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:59:23,942 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 04:59:23,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:59:23,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 04:59:23,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-19 04:59:23,943 INFO L87 Difference]: Start difference. First operand 180 states and 207 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2022-03-19 04:59:24,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:59:24,081 INFO L93 Difference]: Finished difference Result 225 states and 269 transitions. [2022-03-19 04:59:24,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 04:59:24,082 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) Word has length 97 [2022-03-19 04:59:24,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:59:24,083 INFO L225 Difference]: With dead ends: 225 [2022-03-19 04:59:24,083 INFO L226 Difference]: Without dead ends: 182 [2022-03-19 04:59:24,083 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=183, Unknown=0, NotChecked=0, Total=306 [2022-03-19 04:59:24,084 INFO L912 BasicCegarLoop]: 53 mSDtfsCounter, 27 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:59:24,084 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 169 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:59:24,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-03-19 04:59:24,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2022-03-19 04:59:24,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 119 states have (on average 1.1428571428571428) internal successors, (136), 125 states have internal predecessors, (136), 38 states have call successors, (38), 25 states have call predecessors, (38), 24 states have return successors, (35), 31 states have call predecessors, (35), 35 states have call successors, (35) [2022-03-19 04:59:24,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 209 transitions. [2022-03-19 04:59:24,101 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 209 transitions. Word has length 97 [2022-03-19 04:59:24,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:59:24,101 INFO L478 AbstractCegarLoop]: Abstraction has 182 states and 209 transitions. [2022-03-19 04:59:24,101 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2022-03-19 04:59:24,101 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 209 transitions. [2022-03-19 04:59:24,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-03-19 04:59:24,102 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:59:24,102 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:59:24,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-19 04:59:24,315 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:59:24,315 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:59:24,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:59:24,316 INFO L85 PathProgramCache]: Analyzing trace with hash -545719131, now seen corresponding path program 5 times [2022-03-19 04:59:24,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:59:24,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [713816693] [2022-03-19 04:59:24,318 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 04:59:24,318 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 04:59:24,318 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 04:59:24,319 INFO L85 PathProgramCache]: Analyzing trace with hash -545719131, now seen corresponding path program 6 times [2022-03-19 04:59:24,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:59:24,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650011767] [2022-03-19 04:59:24,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:59:24,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:59:24,325 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:59:24,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [450576162] [2022-03-19 04:59:24,326 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:59:24,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:59:24,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:59:24,336 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) [2022-03-19 04:59:24,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-19 04:59:24,536 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 04:59:24,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:59:24,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 04:59:24,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:59:24,733 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 26 proven. 296 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-19 04:59:24,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:59:24,927 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 26 proven. 28 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-19 04:59:24,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:59:24,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650011767] [2022-03-19 04:59:24,927 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:59:24,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450576162] [2022-03-19 04:59:24,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450576162] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:59:24,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:59:24,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-03-19 04:59:24,928 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:59:24,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [713816693] [2022-03-19 04:59:24,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [713816693] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:59:24,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:59:24,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 04:59:24,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313071353] [2022-03-19 04:59:24,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:59:24,928 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 04:59:24,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:59:24,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 04:59:24,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-03-19 04:59:24,929 INFO L87 Difference]: Start difference. First operand 182 states and 209 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 8 states have call successors, (17), 8 states have call predecessors, (17), 6 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2022-03-19 04:59:25,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:59:25,151 INFO L93 Difference]: Finished difference Result 243 states and 275 transitions. [2022-03-19 04:59:25,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 04:59:25,152 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 8 states have call successors, (17), 8 states have call predecessors, (17), 6 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) Word has length 100 [2022-03-19 04:59:25,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:59:25,153 INFO L225 Difference]: With dead ends: 243 [2022-03-19 04:59:25,153 INFO L226 Difference]: Without dead ends: 227 [2022-03-19 04:59:25,154 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=186, Unknown=0, NotChecked=0, Total=306 [2022-03-19 04:59:25,154 INFO L912 BasicCegarLoop]: 61 mSDtfsCounter, 57 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 04:59:25,155 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 218 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 04:59:25,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-03-19 04:59:25,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 224. [2022-03-19 04:59:25,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 148 states have (on average 1.1216216216216217) internal successors, (166), 154 states have internal predecessors, (166), 45 states have call successors, (45), 32 states have call predecessors, (45), 30 states have return successors, (41), 37 states have call predecessors, (41), 41 states have call successors, (41) [2022-03-19 04:59:25,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 252 transitions. [2022-03-19 04:59:25,174 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 252 transitions. Word has length 100 [2022-03-19 04:59:25,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:59:25,175 INFO L478 AbstractCegarLoop]: Abstraction has 224 states and 252 transitions. [2022-03-19 04:59:25,175 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 8 states have call successors, (17), 8 states have call predecessors, (17), 6 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2022-03-19 04:59:25,175 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 252 transitions. [2022-03-19 04:59:25,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-03-19 04:59:25,176 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:59:25,176 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:59:25,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-19 04:59:25,389 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,SelfDestructingSolverStorable22 [2022-03-19 04:59:25,390 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:59:25,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:59:25,390 INFO L85 PathProgramCache]: Analyzing trace with hash -543991253, now seen corresponding path program 11 times [2022-03-19 04:59:25,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:59:25,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1233618648] [2022-03-19 04:59:25,394 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 04:59:25,395 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 04:59:25,395 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 04:59:25,395 INFO L85 PathProgramCache]: Analyzing trace with hash -543991253, now seen corresponding path program 12 times [2022-03-19 04:59:25,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:59:25,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627609472] [2022-03-19 04:59:25,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:59:25,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:59:25,400 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:59:25,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [155782716] [2022-03-19 04:59:25,400 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:59:25,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:59:25,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:59:25,404 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) [2022-03-19 04:59:25,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-19 04:59:25,525 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 04:59:25,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:59:25,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-19 04:59:25,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:59:26,233 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 40 proven. 52 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-03-19 04:59:26,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:00:37,138 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_main_~B~0 4294967296))) (or (not (= c_main_~d~0 (* c_main_~p~0 .cse0))) (let ((.cse5 (= (mod c_main_~p~0 2) 0)) (.cse11 (div c_main_~p~0 2))) (let ((.cse9 (< c_main_~d~0 0)) (.cse8 (= (mod c_main_~d~0 2) 0)) (.cse4 (* (+ c_main_~q~0 c_main_~p~0 .cse11 1) .cse0)) (.cse1 (mod c_main_~A~0 4294967296)) (.cse6 (* .cse0 (+ c_main_~q~0 c_main_~p~0 .cse11))) (.cse2 (* (- 1) c_main_~d~0)) (.cse3 (* (- 1) (div c_main_~d~0 2))) (.cse7 (not .cse5))) (and (or (and (or (= .cse1 (+ (- 1) .cse2 c_main_~r~0 .cse3 .cse4)) .cse5) (or (= .cse1 (+ (- 1) .cse6 .cse2 c_main_~r~0 .cse3)) .cse7)) .cse8 (not .cse9)) (or (and .cse9 (not .cse8)) (let ((.cse10 (< c_main_~p~0 0))) (and (or (= .cse1 (+ .cse2 c_main_~r~0 .cse3 .cse4)) .cse5 (not .cse10)) (or (= .cse1 (+ .cse6 .cse2 c_main_~r~0 .cse3)) (and .cse7 .cse10)))))))))) is different from true [2022-03-19 05:01:37,878 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 40 proven. 41 refuted. 1 times theorem prover too weak. 276 trivial. 10 not checked. [2022-03-19 05:01:37,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:01:37,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627609472] [2022-03-19 05:01:37,878 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:01:37,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155782716] [2022-03-19 05:01:37,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155782716] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:01:37,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:01:37,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 23 [2022-03-19 05:01:37,879 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:01:37,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1233618648] [2022-03-19 05:01:37,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1233618648] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:01:37,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:01:37,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 05:01:37,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531722252] [2022-03-19 05:01:37,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:01:37,879 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 05:01:37,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:01:37,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 05:01:37,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=385, Unknown=2, NotChecked=40, Total=506 [2022-03-19 05:01:37,880 INFO L87 Difference]: Start difference. First operand 224 states and 252 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-19 05:01:38,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:01:38,927 INFO L93 Difference]: Finished difference Result 237 states and 264 transitions. [2022-03-19 05:01:38,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 05:01:38,928 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 100 [2022-03-19 05:01:38,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:01:38,929 INFO L225 Difference]: With dead ends: 237 [2022-03-19 05:01:38,929 INFO L226 Difference]: Without dead ends: 221 [2022-03-19 05:01:38,929 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 174 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=96, Invalid=506, Unknown=2, NotChecked=46, Total=650 [2022-03-19 05:01:38,930 INFO L912 BasicCegarLoop]: 50 mSDtfsCounter, 43 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 05:01:38,930 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 392 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 05:01:38,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-03-19 05:01:38,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2022-03-19 05:01:38,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 146 states have (on average 1.1164383561643836) internal successors, (163), 151 states have internal predecessors, (163), 44 states have call successors, (44), 32 states have call predecessors, (44), 30 states have return successors, (40), 37 states have call predecessors, (40), 40 states have call successors, (40) [2022-03-19 05:01:38,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 247 transitions. [2022-03-19 05:01:38,946 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 247 transitions. Word has length 100 [2022-03-19 05:01:38,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:01:38,947 INFO L478 AbstractCegarLoop]: Abstraction has 221 states and 247 transitions. [2022-03-19 05:01:38,947 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-19 05:01:38,947 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 247 transitions. [2022-03-19 05:01:38,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-19 05:01:38,947 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:01:38,947 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 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] [2022-03-19 05:01:38,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-19 05:01:39,163 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,SelfDestructingSolverStorable23 [2022-03-19 05:01:39,163 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:01:39,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:01:39,164 INFO L85 PathProgramCache]: Analyzing trace with hash -391055071, now seen corresponding path program 13 times [2022-03-19 05:01:39,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:01:39,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [172636881] [2022-03-19 05:01:39,167 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 05:01:39,167 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 05:01:39,167 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 05:01:39,167 INFO L85 PathProgramCache]: Analyzing trace with hash -391055071, now seen corresponding path program 14 times [2022-03-19 05:01:39,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:01:39,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736697623] [2022-03-19 05:01:39,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:01:39,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:01:39,172 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:01:39,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1136425386] [2022-03-19 05:01:39,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 05:01:39,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:01:39,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:01:39,178 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) [2022-03-19 05:01:39,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-19 05:01:39,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 05:01:39,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:01:39,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-19 05:01:39,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:01:40,080 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 28 proven. 39 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-03-19 05:01:40,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:01:47,639 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 28 proven. 39 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-03-19 05:01:47,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:01:47,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736697623] [2022-03-19 05:01:47,639 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:01:47,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136425386] [2022-03-19 05:01:47,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136425386] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:01:47,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:01:47,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2022-03-19 05:01:47,640 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:01:47,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [172636881] [2022-03-19 05:01:47,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [172636881] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:01:47,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:01:47,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 05:01:47,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498882829] [2022-03-19 05:01:47,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:01:47,640 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 05:01:47,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:01:47,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 05:01:47,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2022-03-19 05:01:47,641 INFO L87 Difference]: Start difference. First operand 221 states and 247 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-19 05:01:48,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:01:48,379 INFO L93 Difference]: Finished difference Result 280 states and 328 transitions. [2022-03-19 05:01:48,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 05:01:48,379 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) Word has length 104 [2022-03-19 05:01:48,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:01:48,380 INFO L225 Difference]: With dead ends: 280 [2022-03-19 05:01:48,380 INFO L226 Difference]: Without dead ends: 235 [2022-03-19 05:01:48,381 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2022-03-19 05:01:48,381 INFO L912 BasicCegarLoop]: 61 mSDtfsCounter, 39 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 05:01:48,381 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 530 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 05:01:48,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-03-19 05:01:48,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 232. [2022-03-19 05:01:48,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 153 states have (on average 1.1241830065359477) internal successors, (172), 158 states have internal predecessors, (172), 46 states have call successors, (46), 33 states have call predecessors, (46), 32 states have return successors, (43), 40 states have call predecessors, (43), 43 states have call successors, (43) [2022-03-19 05:01:48,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 261 transitions. [2022-03-19 05:01:48,397 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 261 transitions. Word has length 104 [2022-03-19 05:01:48,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:01:48,398 INFO L478 AbstractCegarLoop]: Abstraction has 232 states and 261 transitions. [2022-03-19 05:01:48,398 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-19 05:01:48,398 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 261 transitions. [2022-03-19 05:01:48,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-03-19 05:01:48,398 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:01:48,398 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:01:48,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-19 05:01:48,611 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:01:48,611 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:01:48,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:01:48,612 INFO L85 PathProgramCache]: Analyzing trace with hash 979077220, now seen corresponding path program 15 times [2022-03-19 05:01:48,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:01:48,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [551061008] [2022-03-19 05:01:48,614 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 05:01:48,614 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 05:01:48,614 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 05:01:48,614 INFO L85 PathProgramCache]: Analyzing trace with hash 979077220, now seen corresponding path program 16 times [2022-03-19 05:01:48,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:01:48,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398525300] [2022-03-19 05:01:48,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:01:48,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:01:48,619 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:01:48,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [292612599] [2022-03-19 05:01:48,619 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 05:01:48,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:01:48,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:01:48,620 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) [2022-03-19 05:01:48,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-19 05:01:48,676 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 05:01:48,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:01:48,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-19 05:01:48,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:01:49,023 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 30 proven. 40 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-19 05:01:49,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:01:52,105 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 30 proven. 22 refuted. 0 times theorem prover too weak. 438 trivial. 0 not checked. [2022-03-19 05:01:52,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:01:52,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398525300] [2022-03-19 05:01:52,105 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:01:52,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292612599] [2022-03-19 05:01:52,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292612599] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:01:52,106 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:01:52,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2022-03-19 05:01:52,106 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:01:52,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [551061008] [2022-03-19 05:01:52,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [551061008] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:01:52,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:01:52,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 05:01:52,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560250548] [2022-03-19 05:01:52,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:01:52,106 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 05:01:52,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:01:52,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 05:01:52,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-03-19 05:01:52,107 INFO L87 Difference]: Start difference. First operand 232 states and 261 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 7 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) [2022-03-19 05:01:52,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:01:52,527 INFO L93 Difference]: Finished difference Result 286 states and 340 transitions. [2022-03-19 05:01:52,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 05:01:52,528 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 7 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) Word has length 109 [2022-03-19 05:01:52,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:01:52,529 INFO L225 Difference]: With dead ends: 286 [2022-03-19 05:01:52,529 INFO L226 Difference]: Without dead ends: 256 [2022-03-19 05:01:52,529 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 202 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-03-19 05:01:52,530 INFO L912 BasicCegarLoop]: 89 mSDtfsCounter, 23 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 05:01:52,530 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 575 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 05:01:52,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-03-19 05:01:52,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 250. [2022-03-19 05:01:52,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 165 states have (on average 1.1333333333333333) internal successors, (187), 172 states have internal predecessors, (187), 51 states have call successors, (51), 34 states have call predecessors, (51), 33 states have return successors, (48), 43 states have call predecessors, (48), 48 states have call successors, (48) [2022-03-19 05:01:52,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 286 transitions. [2022-03-19 05:01:52,551 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 286 transitions. Word has length 109 [2022-03-19 05:01:52,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:01:52,551 INFO L478 AbstractCegarLoop]: Abstraction has 250 states and 286 transitions. [2022-03-19 05:01:52,551 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 7 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) [2022-03-19 05:01:52,551 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 286 transitions. [2022-03-19 05:01:52,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-03-19 05:01:52,552 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:01:52,552 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 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] [2022-03-19 05:01:52,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-19 05:01:52,767 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:01:52,767 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:01:52,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:01:52,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1412827450, now seen corresponding path program 3 times [2022-03-19 05:01:52,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:01:52,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [993768350] [2022-03-19 05:01:52,770 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 05:01:52,770 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 05:01:52,770 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 05:01:52,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1412827450, now seen corresponding path program 4 times [2022-03-19 05:01:52,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:01:52,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433060291] [2022-03-19 05:01:52,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:01:52,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:01:52,782 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:01:52,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [398131211] [2022-03-19 05:01:52,782 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 05:01:52,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:01:52,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:01:52,783 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) [2022-03-19 05:01:52,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-19 05:01:52,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 05:01:52,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:01:52,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-19 05:01:52,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:03:23,806 WARN L833 $PredicateComparison]: unable to prove that (exists ((v_main_~r~0_BEFORE_CALL_168 Int) (aux_div_aux_mod_aux_mod_v_main_~A~0_BEFORE_CALL_144_44_55_81 Int) (aux_mod_aux_mod_aux_mod_v_main_~A~0_BEFORE_CALL_144_44_55_81 Int) (aux_div_aux_mod_v_main_~A~0_BEFORE_CALL_144_44_55 Int)) (let ((.cse0 (* aux_div_aux_mod_aux_mod_v_main_~A~0_BEFORE_CALL_144_44_55_81 4))) (let ((.cse1 (+ aux_mod_aux_mod_aux_mod_v_main_~A~0_BEFORE_CALL_144_44_55_81 4294967297)) (.cse2 (* aux_div_aux_mod_aux_mod_v_main_~A~0_BEFORE_CALL_144_44_55_81 8)) (.cse3 (* (- 2) aux_mod_aux_mod_aux_mod_v_main_~A~0_BEFORE_CALL_144_44_55_81)) (.cse4 (* (- 2) v_main_~r~0_BEFORE_CALL_168)) (.cse6 (* 2 v_main_~r~0_BEFORE_CALL_168)) (.cse5 (+ .cse0 (* aux_div_aux_mod_v_main_~A~0_BEFORE_CALL_144_44_55 4294967296)))) (and (< .cse0 .cse1) (<= 0 aux_mod_aux_mod_aux_mod_v_main_~A~0_BEFORE_CALL_144_44_55_81) (< aux_div_aux_mod_aux_mod_v_main_~A~0_BEFORE_CALL_144_44_55_81 (+ (div (+ (- 1) .cse2 .cse3 .cse4) 4) 1)) (< .cse5 .cse1) (< (div (+ .cse6 2 (* aux_mod_aux_mod_aux_mod_v_main_~A~0_BEFORE_CALL_144_44_55_81 2) (* aux_div_aux_mod_aux_mod_v_main_~A~0_BEFORE_CALL_144_44_55_81 (- 8)) (* (- 8589934592) aux_div_aux_mod_v_main_~A~0_BEFORE_CALL_144_44_55)) (- 4)) (+ (div (+ (- 1) .cse2 (* 8589934592 aux_div_aux_mod_v_main_~A~0_BEFORE_CALL_144_44_55) .cse3 .cse4) 4) 1)) (< aux_mod_aux_mod_aux_mod_v_main_~A~0_BEFORE_CALL_144_44_55_81 4) (let ((.cse7 (mod (+ .cse0 (* aux_mod_aux_mod_aux_mod_v_main_~A~0_BEFORE_CALL_144_44_55_81 4294967295) 4294967295) 4294967296))) (<= (div (+ (* (- 2) .cse7) .cse6) (- 4)) (div .cse7 2))) (<= (+ aux_mod_aux_mod_aux_mod_v_main_~A~0_BEFORE_CALL_144_44_55_81 1) .cse5))))) is different from false [2022-03-19 05:03:39,588 WARN L232 SmtUtils]: Spent 5.19s on a formula simplification that was a NOOP. DAG size: 13 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-03-19 05:04:11,660 WARN L232 SmtUtils]: Spent 12.82s on a formula simplification that was a NOOP. DAG size: 48 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 05:04:19,034 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 30 proven. 33 refuted. 1 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-19 05:04:19,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:04:39,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:04:39,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433060291] [2022-03-19 05:04:39,132 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:04:39,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398131211] [2022-03-19 05:04:39,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398131211] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 05:04:39,132 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 05:04:39,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-03-19 05:04:39,132 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:04:39,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [993768350] [2022-03-19 05:04:39,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [993768350] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:04:39,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:04:39,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 05:04:39,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706808136] [2022-03-19 05:04:39,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:04:39,133 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 05:04:39,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:04:39,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 05:04:39,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=277, Unknown=11, NotChecked=0, Total=380 [2022-03-19 05:04:39,133 INFO L87 Difference]: Start difference. First operand 250 states and 286 transitions. Second operand has 13 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 8 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) [2022-03-19 05:04:41,185 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 05:04:43,592 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 05:04:48,014 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 05:04:50,144 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 05:04:52,310 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 05:04:54,491 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 05:04:56,628 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 05:04:58,787 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 05:05:00,925 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 05:05:03,061 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 05:05:05,252 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 05:05:07,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:05:07,672 INFO L93 Difference]: Finished difference Result 256 states and 292 transitions. [2022-03-19 05:05:07,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 05:05:07,673 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 8 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) Word has length 111 [2022-03-19 05:05:07,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:05:07,674 INFO L225 Difference]: With dead ends: 256 [2022-03-19 05:05:07,674 INFO L226 Difference]: Without dead ends: 210 [2022-03-19 05:05:07,674 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 124 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 51.4s TimeCoverageRelationStatistics Valid=117, Invalid=376, Unknown=13, NotChecked=0, Total=506 [2022-03-19 05:05:07,675 INFO L912 BasicCegarLoop]: 71 mSDtfsCounter, 5 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 3 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 654 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 24.0s IncrementalHoareTripleChecker+Time [2022-03-19 05:05:07,675 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 654 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 229 Invalid, 11 Unknown, 40 Unchecked, 24.0s Time] [2022-03-19 05:05:07,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-03-19 05:05:07,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2022-03-19 05:05:07,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 137 states have (on average 1.1532846715328466) internal successors, (158), 143 states have internal predecessors, (158), 45 states have call successors, (45), 28 states have call predecessors, (45), 27 states have return successors, (42), 38 states have call predecessors, (42), 42 states have call successors, (42) [2022-03-19 05:05:07,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 245 transitions. [2022-03-19 05:05:07,698 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 245 transitions. Word has length 111 [2022-03-19 05:05:07,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:05:07,698 INFO L478 AbstractCegarLoop]: Abstraction has 210 states and 245 transitions. [2022-03-19 05:05:07,698 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 8 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) [2022-03-19 05:05:07,698 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 245 transitions. [2022-03-19 05:05:07,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-19 05:05:07,698 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:05:07,699 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:05:07,717 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-03-19 05:05:07,917 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,SelfDestructingSolverStorable26 [2022-03-19 05:05:07,917 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:05:07,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:05:07,917 INFO L85 PathProgramCache]: Analyzing trace with hash 898486511, now seen corresponding path program 9 times [2022-03-19 05:05:07,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:05:07,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [847574355] [2022-03-19 05:05:07,921 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 05:05:07,921 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 05:05:07,921 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 05:05:07,921 INFO L85 PathProgramCache]: Analyzing trace with hash 898486511, now seen corresponding path program 10 times [2022-03-19 05:05:07,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:05:07,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72059361] [2022-03-19 05:05:07,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:05:07,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:05:07,928 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:05:07,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2068990683] [2022-03-19 05:05:07,928 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 05:05:07,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:05:07,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:05:07,935 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) [2022-03-19 05:05:07,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-19 05:05:08,002 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 05:05:08,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:05:08,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 05:05:08,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:05:08,298 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 90 proven. 430 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-03-19 05:05:08,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:05:08,584 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 32 proven. 70 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-19 05:05:08,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:05:08,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72059361] [2022-03-19 05:05:08,584 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:05:08,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068990683] [2022-03-19 05:05:08,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068990683] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:05:08,585 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:05:08,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-03-19 05:05:08,585 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:05:08,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [847574355] [2022-03-19 05:05:08,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [847574355] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:05:08,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:05:08,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 05:05:08,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262033129] [2022-03-19 05:05:08,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:05:08,586 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 05:05:08,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:05:08,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 05:05:08,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-03-19 05:05:08,587 INFO L87 Difference]: Start difference. First operand 210 states and 245 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 8 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2022-03-19 05:05:08,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:05:08,793 INFO L93 Difference]: Finished difference Result 255 states and 307 transitions. [2022-03-19 05:05:08,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 05:05:08,793 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 8 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) Word has length 115 [2022-03-19 05:05:08,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:05:08,795 INFO L225 Difference]: With dead ends: 255 [2022-03-19 05:05:08,795 INFO L226 Difference]: Without dead ends: 212 [2022-03-19 05:05:08,795 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=249, Unknown=0, NotChecked=0, Total=420 [2022-03-19 05:05:08,796 INFO L912 BasicCegarLoop]: 56 mSDtfsCounter, 21 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 05:05:08,796 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 198 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 05:05:08,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-03-19 05:05:08,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2022-03-19 05:05:08,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 139 states have (on average 1.1510791366906474) internal successors, (160), 145 states have internal predecessors, (160), 45 states have call successors, (45), 28 states have call predecessors, (45), 27 states have return successors, (42), 38 states have call predecessors, (42), 42 states have call successors, (42) [2022-03-19 05:05:08,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 247 transitions. [2022-03-19 05:05:08,817 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 247 transitions. Word has length 115 [2022-03-19 05:05:08,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:05:08,817 INFO L478 AbstractCegarLoop]: Abstraction has 212 states and 247 transitions. [2022-03-19 05:05:08,817 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 8 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2022-03-19 05:05:08,817 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 247 transitions. [2022-03-19 05:05:08,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-03-19 05:05:08,818 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:05:08,818 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:05:08,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-19 05:05:09,031 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,SelfDestructingSolverStorable27 [2022-03-19 05:05:09,031 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:05:09,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:05:09,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1562534599, now seen corresponding path program 7 times [2022-03-19 05:05:09,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:05:09,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1499757588] [2022-03-19 05:05:09,034 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 05:05:09,035 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 05:05:09,035 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 05:05:09,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1562534599, now seen corresponding path program 8 times [2022-03-19 05:05:09,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:05:09,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997190033] [2022-03-19 05:05:09,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:05:09,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:05:09,046 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:05:09,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [30885177] [2022-03-19 05:05:09,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 05:05:09,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:05:09,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:05:09,048 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) [2022-03-19 05:05:09,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-19 05:05:09,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 05:05:09,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:05:09,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-19 05:05:09,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:05:09,506 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 32 proven. 470 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-19 05:05:09,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:05:09,873 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 32 proven. 46 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-19 05:05:09,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:05:09,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997190033] [2022-03-19 05:05:09,873 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:05:09,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30885177] [2022-03-19 05:05:09,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30885177] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:05:09,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:05:09,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-03-19 05:05:09,874 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:05:09,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1499757588] [2022-03-19 05:05:09,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1499757588] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:05:09,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:05:09,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 05:05:09,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863840807] [2022-03-19 05:05:09,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:05:09,874 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 05:05:09,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:05:09,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 05:05:09,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-03-19 05:05:09,875 INFO L87 Difference]: Start difference. First operand 212 states and 247 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 9 states have call successors, (20), 9 states have call predecessors, (20), 7 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2022-03-19 05:05:10,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:05:10,178 INFO L93 Difference]: Finished difference Result 272 states and 312 transitions. [2022-03-19 05:05:10,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 05:05:10,179 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 9 states have call successors, (20), 9 states have call predecessors, (20), 7 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) Word has length 118 [2022-03-19 05:05:10,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:05:10,181 INFO L225 Difference]: With dead ends: 272 [2022-03-19 05:05:10,181 INFO L226 Difference]: Without dead ends: 257 [2022-03-19 05:05:10,182 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=151, Invalid=229, Unknown=0, NotChecked=0, Total=380 [2022-03-19 05:05:10,187 INFO L912 BasicCegarLoop]: 64 mSDtfsCounter, 58 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 05:05:10,187 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 218 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 05:05:10,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-03-19 05:05:10,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 254. [2022-03-19 05:05:10,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 168 states have (on average 1.130952380952381) internal successors, (190), 174 states have internal predecessors, (190), 52 states have call successors, (52), 35 states have call predecessors, (52), 33 states have return successors, (48), 44 states have call predecessors, (48), 48 states have call successors, (48) [2022-03-19 05:05:10,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 290 transitions. [2022-03-19 05:05:10,211 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 290 transitions. Word has length 118 [2022-03-19 05:05:10,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:05:10,211 INFO L478 AbstractCegarLoop]: Abstraction has 254 states and 290 transitions. [2022-03-19 05:05:10,212 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 9 states have call successors, (20), 9 states have call predecessors, (20), 7 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2022-03-19 05:05:10,212 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 290 transitions. [2022-03-19 05:05:10,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-03-19 05:05:10,212 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:05:10,212 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:05:10,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-19 05:05:10,431 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,SelfDestructingSolverStorable28 [2022-03-19 05:05:10,431 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:05:10,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:05:10,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1564262477, now seen corresponding path program 17 times [2022-03-19 05:05:10,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:05:10,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1567791539] [2022-03-19 05:05:10,434 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 05:05:10,434 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-19 05:05:10,434 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 05:05:10,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1564262477, now seen corresponding path program 18 times [2022-03-19 05:05:10,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:05:10,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834012754] [2022-03-19 05:05:10,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:05:10,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:05:10,439 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:05:10,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [484778407] [2022-03-19 05:05:10,440 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 05:05:10,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:05:10,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:05:10,441 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) [2022-03-19 05:05:10,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-19 05:05:10,806 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 05:05:10,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:05:10,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-19 05:05:10,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:05:11,830 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 76 proven. 49 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2022-03-19 05:05:11,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:05:54,892 WARN L232 SmtUtils]: Spent 25.19s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 05:07:40,779 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse17 (div c_main_~d~0 2)) (.cse15 (< c_main_~d~0 0)) (.cse14 (= (mod c_main_~d~0 2) 0))) (let ((.cse16 (and .cse15 (not .cse14))) (.cse13 (+ .cse17 1)) (.cse4 (mod c_main_~A~0 4294967296)) (.cse18 (= (mod c_main_~p~0 2) 0)) (.cse19 (< c_main_~p~0 0)) (.cse10 (mod c_main_~B~0 4294967296)) (.cse12 (div c_main_~p~0 2))) (and (let ((.cse8 (* .cse10 .cse12))) (or (let ((.cse7 (= (mod .cse8 2) 0))) (let ((.cse1 (< .cse12 0)) (.cse0 (= (mod .cse12 2) 0)) (.cse2 (not .cse7)) (.cse6 (* (- 1) (div .cse8 2))) (.cse9 (div .cse12 2))) (and (or (and (not .cse0) .cse1) (let ((.cse5 (* (+ c_main_~q~0 .cse9) .cse10)) (.cse3 (< .cse8 0))) (and (or (and .cse2 .cse3) (= .cse4 (+ .cse5 .cse6 c_main_~r~0))) (or (= (+ (- 1) .cse5 .cse6 c_main_~r~0) .cse4) .cse7 (not .cse3))))) (or (not .cse1) .cse0 (let ((.cse11 (* (+ c_main_~q~0 .cse9 1) .cse10))) (and (or .cse2 (= (+ .cse11 .cse6 c_main_~r~0) .cse4)) (or .cse7 (= .cse4 (+ (- 1) .cse11 .cse6 c_main_~r~0))))))))) (and (or (not (= .cse13 .cse8)) .cse14 (not .cse15)) (or .cse16 (not (= .cse17 .cse8)))) (and (not .cse18) .cse19))) (let ((.cse28 (+ .cse12 1))) (let ((.cse20 (* .cse28 .cse10))) (or (and (or .cse16 (not (= .cse20 .cse17))) (or (not (= .cse13 .cse20)) .cse14)) (let ((.cse25 (= (mod .cse20 2) 0))) (let ((.cse21 (= (mod .cse28 2) 0)) (.cse22 (not .cse25)) (.cse23 (* (- 1) (div .cse20 2))) (.cse26 (div .cse28 2))) (and (or (not .cse21) (let ((.cse24 (* (+ c_main_~q~0 .cse26) .cse10))) (and (or .cse22 (= .cse4 (+ .cse23 .cse24 c_main_~r~0))) (or (= (+ (- 1) .cse23 .cse24 c_main_~r~0) .cse4) .cse25)))) (or .cse21 (let ((.cse27 (* (+ c_main_~q~0 .cse26 1) .cse10))) (and (or (= (+ .cse23 c_main_~r~0 .cse27) .cse4) .cse22) (or (= (+ (- 1) .cse23 c_main_~r~0 .cse27) .cse4) .cse25))))))) .cse18 (not .cse19))))))) is different from true