/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/egcd-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 13:41:09,419 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 13:41:09,421 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 13:41:09,471 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 13:41:09,504 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 13:41:09,504 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 13:41:09,513 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 13:41:09,514 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-20 13:41:09,525 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 13:41:09,526 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 13:41:09,527 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 13:41:09,527 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 13:41:09,527 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 13:41:09,527 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 13:41:09,528 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 13:41:09,528 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 13:41:09,528 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 13:41:09,529 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 13:41:09,529 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 13:41:09,529 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 13:41:09,529 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 13:41:09,529 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 13:41:09,530 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 13:41:09,530 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 13:41:09,530 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 13:41:09,530 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 13:41:09,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 13:41:09,530 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 13:41:09,531 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 13:41:09,531 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 13:41:09,531 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 13:41:09,531 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 13:41:09,531 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-20 13:41:09,531 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 13:41:09,787 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 13:41:09,810 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 13:41:09,812 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 13:41:09,813 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 13:41:09,815 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 13:41:09,816 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/egcd-ll.c [2022-03-20 13:41:09,884 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b74f7a8d5/3fcaffd4187a497091fb71fd317b15bf/FLAG03578feb2 [2022-03-20 13:41:10,246 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 13:41:10,246 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/egcd-ll.c [2022-03-20 13:41:10,255 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b74f7a8d5/3fcaffd4187a497091fb71fd317b15bf/FLAG03578feb2 [2022-03-20 13:41:10,266 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b74f7a8d5/3fcaffd4187a497091fb71fd317b15bf [2022-03-20 13:41:10,269 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 13:41:10,270 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 13:41:10,280 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 13:41:10,280 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 13:41:10,284 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 13:41:10,284 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 01:41:10" (1/1) ... [2022-03-20 13:41:10,285 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@441f2a43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:41:10, skipping insertion in model container [2022-03-20 13:41:10,286 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 01:41:10" (1/1) ... [2022-03-20 13:41:10,292 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 13:41:10,305 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 13:41:10,443 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/egcd-ll.c[489,502] [2022-03-20 13:41:10,459 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 13:41:10,465 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 13:41:10,474 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/egcd-ll.c[489,502] [2022-03-20 13:41:10,480 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 13:41:10,491 INFO L208 MainTranslator]: Completed translation [2022-03-20 13:41:10,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:41:10 WrapperNode [2022-03-20 13:41:10,492 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 13:41:10,493 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 13:41:10,493 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 13:41:10,493 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 13:41:10,504 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:41:10" (1/1) ... [2022-03-20 13:41:10,504 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:41:10" (1/1) ... [2022-03-20 13:41:10,510 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:41:10" (1/1) ... [2022-03-20 13:41:10,510 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:41:10" (1/1) ... [2022-03-20 13:41:10,514 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:41:10" (1/1) ... [2022-03-20 13:41:10,518 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:41:10" (1/1) ... [2022-03-20 13:41:10,519 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:41:10" (1/1) ... [2022-03-20 13:41:10,521 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 13:41:10,522 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 13:41:10,522 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 13:41:10,522 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 13:41:10,523 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:41:10" (1/1) ... [2022-03-20 13:41:10,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 13:41:10,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:41:10,555 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 13:41:10,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 13:41:10,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 13:41:10,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 13:41:10,586 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 13:41:10,586 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 13:41:10,586 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 13:41:10,586 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 13:41:10,586 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 13:41:10,586 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 13:41:10,586 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 13:41:10,587 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 13:41:10,587 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 13:41:10,587 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 13:41:10,587 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 13:41:10,587 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 13:41:10,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 13:41:10,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 13:41:10,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 13:41:10,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 13:41:10,588 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 13:41:10,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 13:41:10,638 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 13:41:10,639 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 13:41:10,762 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 13:41:10,768 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 13:41:10,769 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 13:41:10,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 01:41:10 BoogieIcfgContainer [2022-03-20 13:41:10,771 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 13:41:10,772 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 13:41:10,772 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 13:41:10,775 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 13:41:10,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 01:41:10" (1/3) ... [2022-03-20 13:41:10,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dd5b450 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 01:41:10, skipping insertion in model container [2022-03-20 13:41:10,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:41:10" (2/3) ... [2022-03-20 13:41:10,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dd5b450 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 01:41:10, skipping insertion in model container [2022-03-20 13:41:10,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 01:41:10" (3/3) ... [2022-03-20 13:41:10,779 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll.c [2022-03-20 13:41:10,799 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 13:41:10,799 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 13:41:10,846 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 13:41:10,858 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 13:41:10,859 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 13:41:10,878 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 13:41:10,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 13:41:10,886 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:41:10,887 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:41:10,888 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:41:10,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:41:10,893 INFO L85 PathProgramCache]: Analyzing trace with hash -2012836591, now seen corresponding path program 1 times [2022-03-20 13:41:10,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:41:10,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [821049851] [2022-03-20 13:41:10,910 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:41:10,910 INFO L85 PathProgramCache]: Analyzing trace with hash -2012836591, now seen corresponding path program 2 times [2022-03-20 13:41:10,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:41:10,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232637629] [2022-03-20 13:41:10,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:41:10,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:41:10,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:41:11,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:41:11,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:41:11,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 13:41:11,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:41:11,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 13:41:11,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:41:11,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 13:41:11,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:41:11,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232637629] [2022-03-20 13:41:11,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232637629] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:41:11,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:41:11,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 13:41:11,142 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:41:11,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [821049851] [2022-03-20 13:41:11,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [821049851] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:41:11,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:41:11,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 13:41:11,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318169538] [2022-03-20 13:41:11,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:41:11,148 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 13:41:11,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:41:11,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 13:41:11,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 13:41:11,180 INFO L87 Difference]: Start difference. First operand has 34 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:41:11,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:41:11,312 INFO L93 Difference]: Finished difference Result 61 states and 93 transitions. [2022-03-20 13:41:11,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 13:41:11,314 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-03-20 13:41:11,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:41:11,322 INFO L225 Difference]: With dead ends: 61 [2022-03-20 13:41:11,322 INFO L226 Difference]: Without dead ends: 29 [2022-03-20 13:41:11,329 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 13:41:11,335 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 17 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:41:11,337 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 36 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:41:11,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-20 13:41:11,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-03-20 13:41:11,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 13:41:11,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2022-03-20 13:41:11,393 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 22 [2022-03-20 13:41:11,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:41:11,393 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2022-03-20 13:41:11,394 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:41:11,394 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2022-03-20 13:41:11,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 13:41:11,396 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:41:11,396 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:41:11,397 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 13:41:11,397 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:41:11,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:41:11,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1952740121, now seen corresponding path program 1 times [2022-03-20 13:41:11,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:41:11,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [386153798] [2022-03-20 13:41:11,404 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:41:11,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1952740121, now seen corresponding path program 2 times [2022-03-20 13:41:11,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:41:11,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691918856] [2022-03-20 13:41:11,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:41:11,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:41:11,425 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:41:11,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1711127213] [2022-03-20 13:41:11,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:41:11,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:41:11,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:41:11,432 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:41:11,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 13:41:11,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 13:41:11,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:41:11,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:41:11,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:41:11,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 13:41:11,608 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 13:41:11,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:41:11,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691918856] [2022-03-20 13:41:11,627 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:41:11,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711127213] [2022-03-20 13:41:11,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711127213] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:41:11,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:41:11,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 13:41:11,660 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:41:11,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [386153798] [2022-03-20 13:41:11,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [386153798] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:41:11,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:41:11,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 13:41:11,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080917872] [2022-03-20 13:41:11,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:41:11,662 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 13:41:11,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:41:11,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 13:41:11,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 13:41:11,663 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 13:41:11,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:41:11,769 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2022-03-20 13:41:11,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 13:41:11,770 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2022-03-20 13:41:11,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:41:11,772 INFO L225 Difference]: With dead ends: 45 [2022-03-20 13:41:11,772 INFO L226 Difference]: Without dead ends: 43 [2022-03-20 13:41:11,772 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 13:41:11,774 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 7 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:41:11,774 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 135 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:41:11,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-20 13:41:11,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2022-03-20 13:41:11,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 20 states have (on average 1.25) internal successors, (25), 22 states have internal predecessors, (25), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 13:41:11,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 57 transitions. [2022-03-20 13:41:11,798 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 57 transitions. Word has length 22 [2022-03-20 13:41:11,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:41:11,799 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 57 transitions. [2022-03-20 13:41:11,799 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 13:41:11,799 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 57 transitions. [2022-03-20 13:41:11,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 13:41:11,800 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:41:11,801 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:41:11,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 13:41:12,007 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:41:12,008 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:41:12,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:41:12,010 INFO L85 PathProgramCache]: Analyzing trace with hash 652987931, now seen corresponding path program 1 times [2022-03-20 13:41:12,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:41:12,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [162416577] [2022-03-20 13:41:12,013 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:41:12,013 INFO L85 PathProgramCache]: Analyzing trace with hash 652987931, now seen corresponding path program 2 times [2022-03-20 13:41:12,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:41:12,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980047221] [2022-03-20 13:41:12,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:41:12,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:41:12,049 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:41:12,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [228965014] [2022-03-20 13:41:12,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:41:12,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:41:12,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:41:12,051 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:41:12,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 13:41:12,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:41:12,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:41:12,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 13:41:12,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:41:12,252 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 13:41:12,253 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 13:41:12,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:41:12,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980047221] [2022-03-20 13:41:12,253 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:41:12,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228965014] [2022-03-20 13:41:12,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228965014] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:41:12,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:41:12,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 13:41:12,254 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:41:12,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [162416577] [2022-03-20 13:41:12,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [162416577] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:41:12,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:41:12,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 13:41:12,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453317005] [2022-03-20 13:41:12,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:41:12,257 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 13:41:12,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:41:12,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 13:41:12,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-03-20 13:41:12,258 INFO L87 Difference]: Start difference. First operand 42 states and 57 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 13:41:12,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:41:12,394 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2022-03-20 13:41:12,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 13:41:12,395 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2022-03-20 13:41:12,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:41:12,396 INFO L225 Difference]: With dead ends: 49 [2022-03-20 13:41:12,396 INFO L226 Difference]: Without dead ends: 47 [2022-03-20 13:41:12,397 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-03-20 13:41:12,398 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 20 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:41:12,398 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 177 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:41:12,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-20 13:41:12,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-03-20 13:41:12,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 25 states have internal predecessors, (28), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 13:41:12,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2022-03-20 13:41:12,411 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 27 [2022-03-20 13:41:12,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:41:12,412 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2022-03-20 13:41:12,412 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 13:41:12,412 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2022-03-20 13:41:12,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 13:41:12,413 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:41:12,413 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:41:12,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 13:41:12,638 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-20 13:41:12,638 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:41:12,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:41:12,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1028398105, now seen corresponding path program 1 times [2022-03-20 13:41:12,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:41:12,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [696891471] [2022-03-20 13:41:12,640 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:41:12,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1028398105, now seen corresponding path program 2 times [2022-03-20 13:41:12,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:41:12,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025491436] [2022-03-20 13:41:12,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:41:12,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:41:12,653 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:41:12,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1539576779] [2022-03-20 13:41:12,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:41:12,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:41:12,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:41:12,655 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:41:12,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 13:41:12,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:41:12,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:41:12,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 13:41:12,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:41:12,860 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 13:41:12,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:41:12,987 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-20 13:41:12,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:41:12,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025491436] [2022-03-20 13:41:12,989 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:41:12,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539576779] [2022-03-20 13:41:12,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539576779] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 13:41:12,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 13:41:12,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-03-20 13:41:12,995 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:41:12,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [696891471] [2022-03-20 13:41:12,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [696891471] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:41:12,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:41:12,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 13:41:12,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608253406] [2022-03-20 13:41:12,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:41:12,996 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 13:41:12,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:41:12,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 13:41:12,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-20 13:41:12,997 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (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) [2022-03-20 13:41:13,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:41:13,063 INFO L93 Difference]: Finished difference Result 71 states and 100 transitions. [2022-03-20 13:41:13,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 13:41:13,064 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (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 32 [2022-03-20 13:41:13,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:41:13,070 INFO L225 Difference]: With dead ends: 71 [2022-03-20 13:41:13,070 INFO L226 Difference]: Without dead ends: 67 [2022-03-20 13:41:13,074 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-20 13:41:13,076 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 8 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:41:13,078 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 136 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 13:41:13,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-20 13:41:13,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-03-20 13:41:13,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 32 states have (on average 1.28125) internal successors, (41), 36 states have internal predecessors, (41), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-20 13:41:13,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 93 transitions. [2022-03-20 13:41:13,108 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 93 transitions. Word has length 32 [2022-03-20 13:41:13,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:41:13,109 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 93 transitions. [2022-03-20 13:41:13,109 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (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) [2022-03-20 13:41:13,109 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 93 transitions. [2022-03-20 13:41:13,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-20 13:41:13,110 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:41:13,110 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:41:13,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 13:41:13,315 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:41:13,316 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:41:13,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:41:13,316 INFO L85 PathProgramCache]: Analyzing trace with hash -134474469, now seen corresponding path program 1 times [2022-03-20 13:41:13,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:41:13,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [106571363] [2022-03-20 13:41:13,317 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:41:13,317 INFO L85 PathProgramCache]: Analyzing trace with hash -134474469, now seen corresponding path program 2 times [2022-03-20 13:41:13,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:41:13,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21036699] [2022-03-20 13:41:13,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:41:13,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:41:13,327 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:41:13,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1206435276] [2022-03-20 13:41:13,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:41:13,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:41:13,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:41:13,329 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:41:13,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 13:41:13,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:41:13,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:41:13,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 13:41:13,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:41:13,431 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 13:41:13,431 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 13:41:13,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:41:13,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21036699] [2022-03-20 13:41:13,432 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:41:13,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206435276] [2022-03-20 13:41:13,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206435276] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:41:13,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:41:13,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 13:41:13,432 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:41:13,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [106571363] [2022-03-20 13:41:13,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [106571363] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:41:13,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:41:13,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 13:41:13,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317197919] [2022-03-20 13:41:13,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:41:13,433 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 13:41:13,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:41:13,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 13:41:13,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 13:41:13,434 INFO L87 Difference]: Start difference. First operand 67 states and 93 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-20 13:41:13,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:41:13,472 INFO L93 Difference]: Finished difference Result 73 states and 98 transitions. [2022-03-20 13:41:13,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 13:41:13,473 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 38 [2022-03-20 13:41:13,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:41:13,474 INFO L225 Difference]: With dead ends: 73 [2022-03-20 13:41:13,474 INFO L226 Difference]: Without dead ends: 71 [2022-03-20 13:41:13,474 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 13:41:13,475 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 5 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:41:13,475 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 127 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 13:41:13,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-20 13:41:13,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-03-20 13:41:13,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 39 states have internal predecessors, (44), 28 states have call successors, (28), 8 states have call predecessors, (28), 7 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-20 13:41:13,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 96 transitions. [2022-03-20 13:41:13,489 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 96 transitions. Word has length 38 [2022-03-20 13:41:13,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:41:13,490 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 96 transitions. [2022-03-20 13:41:13,490 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-20 13:41:13,490 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 96 transitions. [2022-03-20 13:41:13,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-20 13:41:13,491 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:41:13,491 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:41:13,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 13:41:13,716 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:41:13,716 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:41:13,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:41:13,717 INFO L85 PathProgramCache]: Analyzing trace with hash 251096952, now seen corresponding path program 1 times [2022-03-20 13:41:13,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:41:13,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [127458164] [2022-03-20 13:41:13,717 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:41:13,717 INFO L85 PathProgramCache]: Analyzing trace with hash 251096952, now seen corresponding path program 2 times [2022-03-20 13:41:13,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:41:13,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196385757] [2022-03-20 13:41:13,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:41:13,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:41:13,728 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:41:13,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1345060685] [2022-03-20 13:41:13,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:41:13,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:41:13,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:41:13,730 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:41:13,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 13:41:13,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:41:13,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:41:13,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 13:41:13,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:41:13,917 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-20 13:41:13,917 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 13:41:13,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:41:13,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196385757] [2022-03-20 13:41:13,917 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:41:13,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345060685] [2022-03-20 13:41:13,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345060685] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:41:13,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:41:13,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 13:41:13,918 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:41:13,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [127458164] [2022-03-20 13:41:13,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [127458164] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:41:13,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:41:13,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 13:41:13,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078139329] [2022-03-20 13:41:13,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:41:13,919 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 13:41:13,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:41:13,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 13:41:13,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 13:41:13,920 INFO L87 Difference]: Start difference. First operand 71 states and 96 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 13:41:13,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:41:13,975 INFO L93 Difference]: Finished difference Result 81 states and 104 transitions. [2022-03-20 13:41:13,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 13:41:13,976 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 40 [2022-03-20 13:41:13,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:41:13,980 INFO L225 Difference]: With dead ends: 81 [2022-03-20 13:41:13,980 INFO L226 Difference]: Without dead ends: 78 [2022-03-20 13:41:13,980 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 13:41:13,982 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:41:13,982 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 135 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 13:41:13,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-03-20 13:41:14,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2022-03-20 13:41:14,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 44 states have internal predecessors, (50), 25 states have call successors, (25), 10 states have call predecessors, (25), 9 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2022-03-20 13:41:14,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 97 transitions. [2022-03-20 13:41:14,012 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 97 transitions. Word has length 40 [2022-03-20 13:41:14,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:41:14,012 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 97 transitions. [2022-03-20 13:41:14,012 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 13:41:14,012 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 97 transitions. [2022-03-20 13:41:14,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-20 13:41:14,013 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:41:14,014 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:41:14,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 13:41:14,232 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:41:14,233 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:41:14,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:41:14,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1098226535, now seen corresponding path program 1 times [2022-03-20 13:41:14,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:41:14,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [574793127] [2022-03-20 13:41:14,234 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:41:14,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1098226535, now seen corresponding path program 2 times [2022-03-20 13:41:14,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:41:14,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700533971] [2022-03-20 13:41:14,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:41:14,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:41:14,244 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:41:14,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [240692341] [2022-03-20 13:41:14,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:41:14,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:41:14,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:41:14,247 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:41:14,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 13:41:14,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:41:14,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:41:14,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 13:41:14,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:41:14,417 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-20 13:41:14,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:41:14,593 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-20 13:41:14,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:41:14,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700533971] [2022-03-20 13:41:14,593 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:41:14,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240692341] [2022-03-20 13:41:14,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240692341] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:41:14,594 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:41:14,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-20 13:41:14,594 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:41:14,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [574793127] [2022-03-20 13:41:14,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [574793127] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:41:14,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:41:14,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 13:41:14,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310665187] [2022-03-20 13:41:14,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:41:14,595 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 13:41:14,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:41:14,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 13:41:14,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-20 13:41:14,596 INFO L87 Difference]: Start difference. First operand 76 states and 97 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 13:41:14,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:41:14,733 INFO L93 Difference]: Finished difference Result 85 states and 107 transitions. [2022-03-20 13:41:14,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 13:41:14,733 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 43 [2022-03-20 13:41:14,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:41:14,734 INFO L225 Difference]: With dead ends: 85 [2022-03-20 13:41:14,734 INFO L226 Difference]: Without dead ends: 81 [2022-03-20 13:41:14,735 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-20 13:41:14,735 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 13 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:41:14,736 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 146 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:41:14,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-20 13:41:14,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-03-20 13:41:14,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 48 states have internal predecessors, (52), 25 states have call successors, (25), 11 states have call predecessors, (25), 10 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-20 13:41:14,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 100 transitions. [2022-03-20 13:41:14,750 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 100 transitions. Word has length 43 [2022-03-20 13:41:14,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:41:14,750 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 100 transitions. [2022-03-20 13:41:14,750 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 13:41:14,750 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 100 transitions. [2022-03-20 13:41:14,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-20 13:41:14,751 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:41:14,752 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 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] [2022-03-20 13:41:14,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 13:41:14,976 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:41:14,977 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:41:14,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:41:14,977 INFO L85 PathProgramCache]: Analyzing trace with hash -17648356, now seen corresponding path program 3 times [2022-03-20 13:41:14,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:41:14,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [148409874] [2022-03-20 13:41:14,977 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:41:14,978 INFO L85 PathProgramCache]: Analyzing trace with hash -17648356, now seen corresponding path program 4 times [2022-03-20 13:41:14,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:41:14,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153488466] [2022-03-20 13:41:14,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:41:14,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:41:14,987 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:41:14,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1102554194] [2022-03-20 13:41:14,988 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:41:14,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:41:14,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:41:14,990 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:41:14,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 13:41:15,035 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:41:15,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:41:15,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-20 13:41:15,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:41:15,348 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 13:41:15,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:41:15,548 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-20 13:41:15,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:41:15,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153488466] [2022-03-20 13:41:15,548 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:41:15,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102554194] [2022-03-20 13:41:15,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102554194] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:41:15,549 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:41:15,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-03-20 13:41:15,549 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:41:15,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [148409874] [2022-03-20 13:41:15,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [148409874] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:41:15,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:41:15,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 13:41:15,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280892000] [2022-03-20 13:41:15,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:41:15,550 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 13:41:15,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:41:15,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 13:41:15,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-03-20 13:41:15,551 INFO L87 Difference]: Start difference. First operand 81 states and 100 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-03-20 13:41:15,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:41:15,793 INFO L93 Difference]: Finished difference Result 115 states and 142 transitions. [2022-03-20 13:41:15,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 13:41:15,793 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2022-03-20 13:41:15,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:41:15,795 INFO L225 Difference]: With dead ends: 115 [2022-03-20 13:41:15,796 INFO L226 Difference]: Without dead ends: 113 [2022-03-20 13:41:15,796 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-03-20 13:41:15,797 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 25 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:41:15,797 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 239 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:41:15,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-03-20 13:41:15,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 109. [2022-03-20 13:41:15,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 63 states have (on average 1.1587301587301588) internal successors, (73), 66 states have internal predecessors, (73), 31 states have call successors, (31), 15 states have call predecessors, (31), 14 states have return successors, (29), 27 states have call predecessors, (29), 29 states have call successors, (29) [2022-03-20 13:41:15,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 133 transitions. [2022-03-20 13:41:15,813 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 133 transitions. Word has length 45 [2022-03-20 13:41:15,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:41:15,814 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 133 transitions. [2022-03-20 13:41:15,814 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-03-20 13:41:15,814 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 133 transitions. [2022-03-20 13:41:15,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-20 13:41:15,815 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:41:15,815 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 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] [2022-03-20 13:41:15,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 13:41:16,031 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:41:16,031 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:41:16,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:41:16,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1834363254, now seen corresponding path program 1 times [2022-03-20 13:41:16,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:41:16,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [887732029] [2022-03-20 13:41:16,033 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:41:16,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1834363254, now seen corresponding path program 2 times [2022-03-20 13:41:16,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:41:16,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857700618] [2022-03-20 13:41:16,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:41:16,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:41:16,043 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:41:16,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1396723485] [2022-03-20 13:41:16,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:41:16,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:41:16,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:41:16,045 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:41:16,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 13:41:16,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:41:16,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:41:16,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-20 13:41:16,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:41:16,369 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-03-20 13:41:16,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:41:16,499 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-20 13:41:16,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:41:16,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857700618] [2022-03-20 13:41:16,499 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:41:16,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396723485] [2022-03-20 13:41:16,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396723485] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:41:16,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:41:16,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 11 [2022-03-20 13:41:16,500 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:41:16,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [887732029] [2022-03-20 13:41:16,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [887732029] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:41:16,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:41:16,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 13:41:16,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359964616] [2022-03-20 13:41:16,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:41:16,501 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 13:41:16,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:41:16,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 13:41:16,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-03-20 13:41:16,502 INFO L87 Difference]: Start difference. First operand 109 states and 133 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-03-20 13:41:16,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:41:16,641 INFO L93 Difference]: Finished difference Result 134 states and 173 transitions. [2022-03-20 13:41:16,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 13:41:16,642 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 50 [2022-03-20 13:41:16,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:41:16,643 INFO L225 Difference]: With dead ends: 134 [2022-03-20 13:41:16,643 INFO L226 Difference]: Without dead ends: 128 [2022-03-20 13:41:16,644 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-03-20 13:41:16,645 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 19 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:41:16,645 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 187 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:41:16,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-20 13:41:16,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2022-03-20 13:41:16,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 76 states have internal predecessors, (85), 40 states have call successors, (40), 16 states have call predecessors, (40), 15 states have return successors, (37), 35 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-20 13:41:16,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 162 transitions. [2022-03-20 13:41:16,666 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 162 transitions. Word has length 50 [2022-03-20 13:41:16,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:41:16,666 INFO L478 AbstractCegarLoop]: Abstraction has 128 states and 162 transitions. [2022-03-20 13:41:16,666 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-03-20 13:41:16,667 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 162 transitions. [2022-03-20 13:41:16,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-20 13:41:16,667 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:41:16,668 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:41:16,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 13:41:16,883 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-20 13:41:16,884 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:41:16,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:41:16,884 INFO L85 PathProgramCache]: Analyzing trace with hash -152607915, now seen corresponding path program 1 times [2022-03-20 13:41:16,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:41:16,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [862653375] [2022-03-20 13:41:16,885 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:41:16,885 INFO L85 PathProgramCache]: Analyzing trace with hash -152607915, now seen corresponding path program 2 times [2022-03-20 13:41:16,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:41:16,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28166238] [2022-03-20 13:41:16,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:41:16,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:41:16,901 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:41:16,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [920182639] [2022-03-20 13:41:16,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:41:16,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:41:16,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:41:16,909 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:41:16,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 13:41:16,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:41:16,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:41:16,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 13:41:16,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:41:17,192 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-20 13:41:17,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:41:17,360 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-03-20 13:41:17,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:41:17,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28166238] [2022-03-20 13:41:17,361 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:41:17,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920182639] [2022-03-20 13:41:17,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920182639] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 13:41:17,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 13:41:17,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2022-03-20 13:41:17,361 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:41:17,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [862653375] [2022-03-20 13:41:17,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [862653375] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:41:17,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:41:17,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 13:41:17,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332101] [2022-03-20 13:41:17,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:41:17,362 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 13:41:17,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:41:17,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 13:41:17,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-20 13:41:17,363 INFO L87 Difference]: Start difference. First operand 128 states and 162 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 13:41:17,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:41:17,417 INFO L93 Difference]: Finished difference Result 134 states and 167 transitions. [2022-03-20 13:41:17,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 13:41:17,417 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 58 [2022-03-20 13:41:17,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:41:17,419 INFO L225 Difference]: With dead ends: 134 [2022-03-20 13:41:17,419 INFO L226 Difference]: Without dead ends: 129 [2022-03-20 13:41:17,419 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 106 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-20 13:41:17,420 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:41:17,420 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 108 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 13:41:17,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-03-20 13:41:17,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-03-20 13:41:17,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 75 states have (on average 1.16) internal successors, (87), 78 states have internal predecessors, (87), 37 states have call successors, (37), 17 states have call predecessors, (37), 16 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) [2022-03-20 13:41:17,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 159 transitions. [2022-03-20 13:41:17,456 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 159 transitions. Word has length 58 [2022-03-20 13:41:17,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:41:17,456 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 159 transitions. [2022-03-20 13:41:17,456 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 13:41:17,456 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 159 transitions. [2022-03-20 13:41:17,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-20 13:41:17,461 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:41:17,461 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:41:17,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 13:41:17,687 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-20 13:41:17,688 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:41:17,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:41:17,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1386725923, now seen corresponding path program 5 times [2022-03-20 13:41:17,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:41:17,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1454118820] [2022-03-20 13:41:17,688 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:41:17,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1386725923, now seen corresponding path program 6 times [2022-03-20 13:41:17,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:41:17,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070763815] [2022-03-20 13:41:17,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:41:17,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:41:17,701 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:41:17,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1206365021] [2022-03-20 13:41:17,702 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:41:17,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:41:17,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:41:17,703 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:41:17,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 13:41:17,766 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 13:41:17,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:41:17,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-20 13:41:17,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:41:18,179 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-03-20 13:41:18,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:41:18,368 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-20 13:41:18,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:41:18,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070763815] [2022-03-20 13:41:18,368 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:41:18,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206365021] [2022-03-20 13:41:18,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206365021] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:41:18,368 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:41:18,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 13 [2022-03-20 13:41:18,369 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:41:18,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1454118820] [2022-03-20 13:41:18,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1454118820] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:41:18,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:41:18,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 13:41:18,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283224225] [2022-03-20 13:41:18,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:41:18,369 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 13:41:18,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:41:18,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 13:41:18,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-20 13:41:18,370 INFO L87 Difference]: Start difference. First operand 129 states and 159 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-20 13:41:18,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:41:18,592 INFO L93 Difference]: Finished difference Result 163 states and 201 transitions. [2022-03-20 13:41:18,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 13:41:18,592 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 63 [2022-03-20 13:41:18,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:41:18,594 INFO L225 Difference]: With dead ends: 163 [2022-03-20 13:41:18,594 INFO L226 Difference]: Without dead ends: 161 [2022-03-20 13:41:18,594 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-03-20 13:41:18,595 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 20 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:41:18,595 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 293 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:41:18,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-03-20 13:41:18,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 147. [2022-03-20 13:41:18,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 87 states have (on average 1.1494252873563218) internal successors, (100), 90 states have internal predecessors, (100), 40 states have call successors, (40), 20 states have call predecessors, (40), 19 states have return successors, (38), 36 states have call predecessors, (38), 38 states have call successors, (38) [2022-03-20 13:41:18,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 178 transitions. [2022-03-20 13:41:18,617 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 178 transitions. Word has length 63 [2022-03-20 13:41:18,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:41:18,617 INFO L478 AbstractCegarLoop]: Abstraction has 147 states and 178 transitions. [2022-03-20 13:41:18,618 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-20 13:41:18,618 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 178 transitions. [2022-03-20 13:41:18,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-20 13:41:18,618 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:41:18,618 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:41:18,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 13:41:18,831 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-20 13:41:18,831 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:41:18,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:41:18,832 INFO L85 PathProgramCache]: Analyzing trace with hash -522529, now seen corresponding path program 3 times [2022-03-20 13:41:18,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:41:18,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1067164810] [2022-03-20 13:41:18,832 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:41:18,832 INFO L85 PathProgramCache]: Analyzing trace with hash -522529, now seen corresponding path program 4 times [2022-03-20 13:41:18,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:41:18,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127852642] [2022-03-20 13:41:18,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:41:18,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:41:18,841 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:41:18,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [554792179] [2022-03-20 13:41:18,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:41:18,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:41:18,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:41:18,848 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:41:18,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 13:41:18,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:41:18,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:41:18,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 13:41:18,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:41:19,250 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-20 13:41:19,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:41:19,404 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-20 13:41:19,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:41:19,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127852642] [2022-03-20 13:41:19,405 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:41:19,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554792179] [2022-03-20 13:41:19,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554792179] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:41:19,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:41:19,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-03-20 13:41:19,406 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:41:19,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1067164810] [2022-03-20 13:41:19,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1067164810] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:41:19,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:41:19,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 13:41:19,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566424009] [2022-03-20 13:41:19,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:41:19,407 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 13:41:19,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:41:19,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 13:41:19,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-20 13:41:19,408 INFO L87 Difference]: Start difference. First operand 147 states and 178 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 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) [2022-03-20 13:41:19,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:41:19,544 INFO L93 Difference]: Finished difference Result 185 states and 223 transitions. [2022-03-20 13:41:19,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 13:41:19,545 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 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 63 [2022-03-20 13:41:19,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:41:19,546 INFO L225 Difference]: With dead ends: 185 [2022-03-20 13:41:19,546 INFO L226 Difference]: Without dead ends: 183 [2022-03-20 13:41:19,547 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-03-20 13:41:19,547 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 8 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:41:19,547 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 251 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:41:19,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-03-20 13:41:19,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 169. [2022-03-20 13:41:19,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 102 states have (on average 1.1372549019607843) internal successors, (116), 105 states have internal predecessors, (116), 43 states have call successors, (43), 24 states have call predecessors, (43), 23 states have return successors, (41), 39 states have call predecessors, (41), 41 states have call successors, (41) [2022-03-20 13:41:19,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 200 transitions. [2022-03-20 13:41:19,571 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 200 transitions. Word has length 63 [2022-03-20 13:41:19,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:41:19,571 INFO L478 AbstractCegarLoop]: Abstraction has 169 states and 200 transitions. [2022-03-20 13:41:19,572 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 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) [2022-03-20 13:41:19,572 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 200 transitions. [2022-03-20 13:41:19,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-20 13:41:19,572 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:41:19,572 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:41:19,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 13:41:19,799 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-20 13:41:19,800 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:41:19,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:41:19,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1383919957, now seen corresponding path program 5 times [2022-03-20 13:41:19,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:41:19,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [597018372] [2022-03-20 13:41:19,801 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:41:19,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1383919957, now seen corresponding path program 6 times [2022-03-20 13:41:19,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:41:19,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144261225] [2022-03-20 13:41:19,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:41:19,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:41:19,810 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:41:19,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [252375475] [2022-03-20 13:41:19,810 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:41:19,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:41:19,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:41:19,812 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:41:19,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 13:41:19,870 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 13:41:19,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:41:19,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-20 13:41:19,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:41:20,199 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 27 proven. 24 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-03-20 13:41:20,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:41:20,484 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 34 proven. 17 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-03-20 13:41:20,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:41:20,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144261225] [2022-03-20 13:41:20,484 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:41:20,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252375475] [2022-03-20 13:41:20,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252375475] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:41:20,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:41:20,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2022-03-20 13:41:20,485 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:41:20,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [597018372] [2022-03-20 13:41:20,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [597018372] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:41:20,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:41:20,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 13:41:20,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5242554] [2022-03-20 13:41:20,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:41:20,486 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 13:41:20,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:41:20,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 13:41:20,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-20 13:41:20,486 INFO L87 Difference]: Start difference. First operand 169 states and 200 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 13:41:20,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:41:20,702 INFO L93 Difference]: Finished difference Result 191 states and 234 transitions. [2022-03-20 13:41:20,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 13:41:20,703 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 68 [2022-03-20 13:41:20,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:41:20,705 INFO L225 Difference]: With dead ends: 191 [2022-03-20 13:41:20,705 INFO L226 Difference]: Without dead ends: 185 [2022-03-20 13:41:20,705 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-03-20 13:41:20,706 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 14 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:41:20,706 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 205 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:41:20,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-03-20 13:41:20,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 172. [2022-03-20 13:41:20,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 103 states have (on average 1.1359223300970873) internal successors, (117), 107 states have internal predecessors, (117), 45 states have call successors, (45), 24 states have call predecessors, (45), 23 states have return successors, (43), 40 states have call predecessors, (43), 43 states have call successors, (43) [2022-03-20 13:41:20,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 205 transitions. [2022-03-20 13:41:20,730 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 205 transitions. Word has length 68 [2022-03-20 13:41:20,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:41:20,730 INFO L478 AbstractCegarLoop]: Abstraction has 172 states and 205 transitions. [2022-03-20 13:41:20,730 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 13:41:20,730 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 205 transitions. [2022-03-20 13:41:20,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-20 13:41:20,731 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:41:20,731 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:41:20,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 13:41:20,959 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 13:41:20,959 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:41:20,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:41:20,960 INFO L85 PathProgramCache]: Analyzing trace with hash -860063341, now seen corresponding path program 3 times [2022-03-20 13:41:20,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:41:20,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [285394344] [2022-03-20 13:41:20,960 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:41:20,960 INFO L85 PathProgramCache]: Analyzing trace with hash -860063341, now seen corresponding path program 4 times [2022-03-20 13:41:20,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:41:20,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176043316] [2022-03-20 13:41:20,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:41:20,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:41:20,969 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:41:20,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [498976597] [2022-03-20 13:41:20,970 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:41:20,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:41:20,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:41:20,973 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:41:20,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 13:41:21,024 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:41:21,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:41:21,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-20 13:41:21,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:41:21,406 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-03-20 13:41:21,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:41:21,665 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 34 proven. 17 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-03-20 13:41:21,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:41:21,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176043316] [2022-03-20 13:41:21,666 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:41:21,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498976597] [2022-03-20 13:41:21,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498976597] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:41:21,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:41:21,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2022-03-20 13:41:21,666 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:41:21,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [285394344] [2022-03-20 13:41:21,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [285394344] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:41:21,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:41:21,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 13:41:21,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759473767] [2022-03-20 13:41:21,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:41:21,668 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 13:41:21,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:41:21,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 13:41:21,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-03-20 13:41:21,668 INFO L87 Difference]: Start difference. First operand 172 states and 205 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 13:41:21,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:41:21,921 INFO L93 Difference]: Finished difference Result 197 states and 245 transitions. [2022-03-20 13:41:21,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 13:41:21,922 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 68 [2022-03-20 13:41:21,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:41:21,923 INFO L225 Difference]: With dead ends: 197 [2022-03-20 13:41:21,923 INFO L226 Difference]: Without dead ends: 188 [2022-03-20 13:41:21,923 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 121 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-03-20 13:41:21,924 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 15 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:41:21,924 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 188 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:41:21,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-03-20 13:41:21,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2022-03-20 13:41:21,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 112 states have (on average 1.1428571428571428) internal successors, (128), 116 states have internal predecessors, (128), 51 states have call successors, (51), 25 states have call predecessors, (51), 24 states have return successors, (49), 46 states have call predecessors, (49), 49 states have call successors, (49) [2022-03-20 13:41:21,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 228 transitions. [2022-03-20 13:41:21,949 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 228 transitions. Word has length 68 [2022-03-20 13:41:21,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:41:21,949 INFO L478 AbstractCegarLoop]: Abstraction has 188 states and 228 transitions. [2022-03-20 13:41:21,949 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 13:41:21,949 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 228 transitions. [2022-03-20 13:41:21,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-20 13:41:21,950 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:41:21,950 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:41:21,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 13:41:22,167 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-20 13:41:22,167 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:41:22,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:41:22,168 INFO L85 PathProgramCache]: Analyzing trace with hash -35686306, now seen corresponding path program 7 times [2022-03-20 13:41:22,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:41:22,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1407632828] [2022-03-20 13:41:22,168 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:41:22,168 INFO L85 PathProgramCache]: Analyzing trace with hash -35686306, now seen corresponding path program 8 times [2022-03-20 13:41:22,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:41:22,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778244211] [2022-03-20 13:41:22,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:41:22,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:41:22,176 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:41:22,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [488911629] [2022-03-20 13:41:22,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:41:22,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:41:22,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:41:22,178 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:41:22,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 13:41:22,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:41:22,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:41:22,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 13:41:22,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:41:22,645 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 20 proven. 27 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-20 13:41:22,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:41:22,918 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 20 proven. 27 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-20 13:41:22,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:41:22,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778244211] [2022-03-20 13:41:22,919 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:41:22,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488911629] [2022-03-20 13:41:22,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488911629] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:41:22,919 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:41:22,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2022-03-20 13:41:22,920 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:41:22,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1407632828] [2022-03-20 13:41:22,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1407632828] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:41:22,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:41:22,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 13:41:22,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830774530] [2022-03-20 13:41:22,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:41:22,920 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 13:41:22,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:41:22,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 13:41:22,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-20 13:41:22,921 INFO L87 Difference]: Start difference. First operand 188 states and 228 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (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) [2022-03-20 13:41:23,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:41:23,112 INFO L93 Difference]: Finished difference Result 222 states and 270 transitions. [2022-03-20 13:41:23,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 13:41:23,113 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (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 81 [2022-03-20 13:41:23,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:41:23,114 INFO L225 Difference]: With dead ends: 222 [2022-03-20 13:41:23,114 INFO L226 Difference]: Without dead ends: 220 [2022-03-20 13:41:23,116 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-03-20 13:41:23,118 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 8 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:41:23,118 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 288 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:41:23,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-03-20 13:41:23,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 216. [2022-03-20 13:41:23,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 130 states have (on average 1.146153846153846) internal successors, (149), 134 states have internal predecessors, (149), 57 states have call successors, (57), 29 states have call predecessors, (57), 28 states have return successors, (55), 52 states have call predecessors, (55), 55 states have call successors, (55) [2022-03-20 13:41:23,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 261 transitions. [2022-03-20 13:41:23,148 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 261 transitions. Word has length 81 [2022-03-20 13:41:23,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:41:23,148 INFO L478 AbstractCegarLoop]: Abstraction has 216 states and 261 transitions. [2022-03-20 13:41:23,148 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (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) [2022-03-20 13:41:23,148 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 261 transitions. [2022-03-20 13:41:23,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-20 13:41:23,150 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:41:23,150 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:41:23,177 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-03-20 13:41:23,375 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:41:23,375 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:41:23,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:41:23,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1350517088, now seen corresponding path program 7 times [2022-03-20 13:41:23,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:41:23,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [120826574] [2022-03-20 13:41:23,376 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:41:23,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1350517088, now seen corresponding path program 8 times [2022-03-20 13:41:23,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:41:23,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624740200] [2022-03-20 13:41:23,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:41:23,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:41:23,384 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:41:23,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2116651285] [2022-03-20 13:41:23,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:41:23,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:41:23,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:41:23,386 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:41:23,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 13:41:23,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:41:23,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:41:23,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-20 13:41:23,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:41:24,972 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 42 proven. 53 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-03-20 13:41:24,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:41:25,797 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 59 proven. 36 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-03-20 13:41:25,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:41:25,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624740200] [2022-03-20 13:41:25,797 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:41:25,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116651285] [2022-03-20 13:41:25,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116651285] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:41:25,798 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:41:25,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2022-03-20 13:41:25,798 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:41:25,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [120826574] [2022-03-20 13:41:25,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [120826574] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:41:25,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:41:25,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 13:41:25,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284386544] [2022-03-20 13:41:25,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:41:25,799 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 13:41:25,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:41:25,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 13:41:25,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-03-20 13:41:25,799 INFO L87 Difference]: Start difference. First operand 216 states and 261 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2022-03-20 13:41:27,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:41:27,076 INFO L93 Difference]: Finished difference Result 257 states and 311 transitions. [2022-03-20 13:41:27,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 13:41:27,077 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) Word has length 81 [2022-03-20 13:41:27,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:41:27,079 INFO L225 Difference]: With dead ends: 257 [2022-03-20 13:41:27,079 INFO L226 Difference]: Without dead ends: 255 [2022-03-20 13:41:27,080 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 144 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2022-03-20 13:41:27,080 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 17 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:41:27,080 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 307 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-20 13:41:27,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-03-20 13:41:27,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 221. [2022-03-20 13:41:27,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 135 states have (on average 1.1333333333333333) internal successors, (153), 138 states have internal predecessors, (153), 55 states have call successors, (55), 31 states have call predecessors, (55), 30 states have return successors, (53), 51 states have call predecessors, (53), 53 states have call successors, (53) [2022-03-20 13:41:27,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 261 transitions. [2022-03-20 13:41:27,122 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 261 transitions. Word has length 81 [2022-03-20 13:41:27,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:41:27,123 INFO L478 AbstractCegarLoop]: Abstraction has 221 states and 261 transitions. [2022-03-20 13:41:27,123 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2022-03-20 13:41:27,123 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 261 transitions. [2022-03-20 13:41:27,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-20 13:41:27,124 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:41:27,124 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:41:27,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-20 13:41:27,350 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-20 13:41:27,350 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:41:27,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:41:27,351 INFO L85 PathProgramCache]: Analyzing trace with hash -388774688, now seen corresponding path program 9 times [2022-03-20 13:41:27,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:41:27,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [667132372] [2022-03-20 13:41:27,351 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:41:27,351 INFO L85 PathProgramCache]: Analyzing trace with hash -388774688, now seen corresponding path program 10 times [2022-03-20 13:41:27,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:41:27,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400991722] [2022-03-20 13:41:27,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:41:27,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:41:27,371 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:41:27,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1295775596] [2022-03-20 13:41:27,371 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:41:27,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:41:27,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:41:27,374 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:41:27,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 13:41:27,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:41:27,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:41:27,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-20 13:41:27,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:41:28,183 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 59 proven. 51 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-03-20 13:41:28,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:41:28,475 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 75 proven. 8 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-03-20 13:41:28,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:41:28,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400991722] [2022-03-20 13:41:28,476 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:41:28,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295775596] [2022-03-20 13:41:28,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295775596] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:41:28,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:41:28,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-03-20 13:41:28,476 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:41:28,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [667132372] [2022-03-20 13:41:28,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [667132372] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:41:28,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:41:28,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 13:41:28,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326393789] [2022-03-20 13:41:28,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:41:28,477 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 13:41:28,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:41:28,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 13:41:28,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-03-20 13:41:28,478 INFO L87 Difference]: Start difference. First operand 221 states and 261 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2022-03-20 13:41:28,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:41:28,916 INFO L93 Difference]: Finished difference Result 261 states and 313 transitions. [2022-03-20 13:41:28,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 13:41:28,916 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) Word has length 81 [2022-03-20 13:41:28,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:41:28,918 INFO L225 Difference]: With dead ends: 261 [2022-03-20 13:41:28,918 INFO L226 Difference]: Without dead ends: 259 [2022-03-20 13:41:28,919 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-03-20 13:41:28,919 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 15 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:41:28,919 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 302 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 13:41:28,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-03-20 13:41:28,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 223. [2022-03-20 13:41:28,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 136 states have (on average 1.1323529411764706) internal successors, (154), 140 states have internal predecessors, (154), 56 states have call successors, (56), 31 states have call predecessors, (56), 30 states have return successors, (54), 51 states have call predecessors, (54), 54 states have call successors, (54) [2022-03-20 13:41:28,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 264 transitions. [2022-03-20 13:41:28,982 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 264 transitions. Word has length 81 [2022-03-20 13:41:28,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:41:28,983 INFO L478 AbstractCegarLoop]: Abstraction has 223 states and 264 transitions. [2022-03-20 13:41:28,983 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2022-03-20 13:41:28,983 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 264 transitions. [2022-03-20 13:41:28,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-20 13:41:28,984 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:41:28,984 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:41:29,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-20 13:41:29,187 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-20 13:41:29,188 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:41:29,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:41:29,188 INFO L85 PathProgramCache]: Analyzing trace with hash 997428706, now seen corresponding path program 11 times [2022-03-20 13:41:29,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:41:29,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1679455432] [2022-03-20 13:41:29,188 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:41:29,188 INFO L85 PathProgramCache]: Analyzing trace with hash 997428706, now seen corresponding path program 12 times [2022-03-20 13:41:29,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:41:29,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2493336] [2022-03-20 13:41:29,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:41:29,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:41:29,194 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:41:29,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [579087149] [2022-03-20 13:41:29,195 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:41:29,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:41:29,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:41:29,196 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:41:29,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 13:41:29,253 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 13:41:29,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:41:29,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 13:41:29,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:41:29,540 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 70 proven. 11 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2022-03-20 13:41:29,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:41:30,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:41:30,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2493336] [2022-03-20 13:41:30,948 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:41:30,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579087149] [2022-03-20 13:41:30,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579087149] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:41:30,948 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 13:41:30,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-20 13:41:30,948 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:41:30,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1679455432] [2022-03-20 13:41:30,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1679455432] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:41:30,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:41:30,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 13:41:30,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155970794] [2022-03-20 13:41:30,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:41:30,949 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 13:41:30,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:41:30,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 13:41:30,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-03-20 13:41:30,950 INFO L87 Difference]: Start difference. First operand 223 states and 264 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-20 13:41:31,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:41:31,436 INFO L93 Difference]: Finished difference Result 282 states and 346 transitions. [2022-03-20 13:41:31,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 13:41:31,436 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 81 [2022-03-20 13:41:31,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:41:31,438 INFO L225 Difference]: With dead ends: 282 [2022-03-20 13:41:31,438 INFO L226 Difference]: Without dead ends: 276 [2022-03-20 13:41:31,438 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-03-20 13:41:31,439 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 19 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:41:31,439 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 268 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 13:41:31,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-03-20 13:41:31,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 233. [2022-03-20 13:41:31,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 142 states have (on average 1.119718309859155) internal successors, (159), 147 states have internal predecessors, (159), 58 states have call successors, (58), 33 states have call predecessors, (58), 32 states have return successors, (56), 52 states have call predecessors, (56), 56 states have call successors, (56) [2022-03-20 13:41:31,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 273 transitions. [2022-03-20 13:41:31,495 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 273 transitions. Word has length 81 [2022-03-20 13:41:31,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:41:31,496 INFO L478 AbstractCegarLoop]: Abstraction has 233 states and 273 transitions. [2022-03-20 13:41:31,496 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-20 13:41:31,496 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 273 transitions. [2022-03-20 13:41:31,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-20 13:41:31,497 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:41:31,497 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:41:31,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-20 13:41:31,711 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-20 13:41:31,712 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:41:31,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:41:31,712 INFO L85 PathProgramCache]: Analyzing trace with hash 327884660, now seen corresponding path program 13 times [2022-03-20 13:41:31,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:41:31,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [739259810] [2022-03-20 13:41:31,712 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:41:31,712 INFO L85 PathProgramCache]: Analyzing trace with hash 327884660, now seen corresponding path program 14 times [2022-03-20 13:41:31,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:41:31,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029827655] [2022-03-20 13:41:31,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:41:31,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:41:31,720 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:41:31,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [876272646] [2022-03-20 13:41:31,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:41:31,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:41:31,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:41:31,722 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:41:31,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-20 13:41:31,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:41:31,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:41:31,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-20 13:41:31,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:41:32,248 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 22 proven. 30 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-03-20 13:41:32,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:41:32,688 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 22 proven. 30 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-03-20 13:41:32,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:41:32,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029827655] [2022-03-20 13:41:32,688 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:41:32,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876272646] [2022-03-20 13:41:32,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876272646] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:41:32,688 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:41:32,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-03-20 13:41:32,689 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:41:32,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [739259810] [2022-03-20 13:41:32,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [739259810] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:41:32,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:41:32,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 13:41:32,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842958729] [2022-03-20 13:41:32,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:41:32,689 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 13:41:32,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:41:32,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 13:41:32,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-03-20 13:41:32,690 INFO L87 Difference]: Start difference. First operand 233 states and 273 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-20 13:41:32,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:41:32,878 INFO L93 Difference]: Finished difference Result 255 states and 307 transitions. [2022-03-20 13:41:32,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 13:41:32,879 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 86 [2022-03-20 13:41:32,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:41:32,880 INFO L225 Difference]: With dead ends: 255 [2022-03-20 13:41:32,880 INFO L226 Difference]: Without dead ends: 249 [2022-03-20 13:41:32,881 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-03-20 13:41:32,882 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 9 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:41:32,882 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 301 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:41:32,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-03-20 13:41:32,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 236. [2022-03-20 13:41:32,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 143 states have (on average 1.118881118881119) internal successors, (160), 149 states have internal predecessors, (160), 60 states have call successors, (60), 33 states have call predecessors, (60), 32 states have return successors, (58), 53 states have call predecessors, (58), 58 states have call successors, (58) [2022-03-20 13:41:32,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 278 transitions. [2022-03-20 13:41:32,929 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 278 transitions. Word has length 86 [2022-03-20 13:41:32,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:41:32,929 INFO L478 AbstractCegarLoop]: Abstraction has 236 states and 278 transitions. [2022-03-20 13:41:32,929 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-20 13:41:32,929 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 278 transitions. [2022-03-20 13:41:32,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-20 13:41:32,930 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:41:32,930 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:41:32,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-20 13:41:33,151 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:41:33,151 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:41:33,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:41:33,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1916098638, now seen corresponding path program 15 times [2022-03-20 13:41:33,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:41:33,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [339974425] [2022-03-20 13:41:33,152 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:41:33,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1916098638, now seen corresponding path program 16 times [2022-03-20 13:41:33,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:41:33,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766088553] [2022-03-20 13:41:33,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:41:33,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:41:33,158 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:41:33,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2132389269] [2022-03-20 13:41:33,159 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:41:33,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:41:33,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:41:33,160 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:41:33,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-20 13:41:33,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:41:33,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:41:33,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 50 conjunts are in the unsatisfiable core [2022-03-20 13:41:33,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:41:34,575 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:41:34,770 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 79 proven. 45 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2022-03-20 13:41:34,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:41:35,124 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 87 proven. 5 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-20 13:41:35,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:41:35,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766088553] [2022-03-20 13:41:35,125 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:41:35,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132389269] [2022-03-20 13:41:35,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132389269] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:41:35,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:41:35,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 18 [2022-03-20 13:41:35,125 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:41:35,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [339974425] [2022-03-20 13:41:35,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [339974425] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:41:35,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:41:35,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 13:41:35,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168870653] [2022-03-20 13:41:35,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:41:35,126 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 13:41:35,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:41:35,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 13:41:35,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-03-20 13:41:35,127 INFO L87 Difference]: Start difference. First operand 236 states and 278 transitions. Second operand has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-20 13:41:36,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:41:36,490 INFO L93 Difference]: Finished difference Result 282 states and 338 transitions. [2022-03-20 13:41:36,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 13:41:36,491 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) Word has length 86 [2022-03-20 13:41:36,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:41:36,493 INFO L225 Difference]: With dead ends: 282 [2022-03-20 13:41:36,493 INFO L226 Difference]: Without dead ends: 272 [2022-03-20 13:41:36,493 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 153 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-03-20 13:41:36,494 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 17 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:41:36,494 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 379 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-20 13:41:36,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-03-20 13:41:36,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 254. [2022-03-20 13:41:36,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 155 states have (on average 1.1161290322580646) internal successors, (173), 161 states have internal predecessors, (173), 63 states have call successors, (63), 36 states have call predecessors, (63), 35 states have return successors, (61), 56 states have call predecessors, (61), 61 states have call successors, (61) [2022-03-20 13:41:36,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 297 transitions. [2022-03-20 13:41:36,548 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 297 transitions. Word has length 86 [2022-03-20 13:41:36,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:41:36,548 INFO L478 AbstractCegarLoop]: Abstraction has 254 states and 297 transitions. [2022-03-20 13:41:36,548 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-20 13:41:36,548 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 297 transitions. [2022-03-20 13:41:36,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-20 13:41:36,549 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:41:36,550 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:41:36,576 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-03-20 13:41:36,763 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:41:36,763 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:41:36,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:41:36,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1866224690, now seen corresponding path program 17 times [2022-03-20 13:41:36,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:41:36,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1982539690] [2022-03-20 13:41:36,764 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:41:36,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1866224690, now seen corresponding path program 18 times [2022-03-20 13:41:36,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:41:36,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604444252] [2022-03-20 13:41:36,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:41:36,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:41:36,770 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:41:36,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [78034991] [2022-03-20 13:41:36,771 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:41:36,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:41:36,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:41:36,772 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:41:36,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-20 13:41:36,813 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 13:41:36,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:41:36,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 13:41:36,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:41:47,540 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:41:47,827 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 71 proven. 29 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2022-03-20 13:41:47,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:41:51,956 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 87 proven. 5 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-20 13:41:51,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:41:51,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604444252] [2022-03-20 13:41:51,957 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:41:51,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78034991] [2022-03-20 13:41:51,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78034991] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:41:51,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:41:51,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 14 [2022-03-20 13:41:51,958 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:41:51,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1982539690] [2022-03-20 13:41:51,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1982539690] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:41:51,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:41:51,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 13:41:51,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010502524] [2022-03-20 13:41:51,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:41:51,959 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 13:41:51,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:41:51,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 13:41:51,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=143, Unknown=1, NotChecked=0, Total=182 [2022-03-20 13:41:51,960 INFO L87 Difference]: Start difference. First operand 254 states and 297 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 13:41:53,466 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 13:41:58,557 WARN L232 SmtUtils]: Spent 5.03s on a formula simplification. DAG size of input: 54 DAG size of output: 38 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 13:42:00,813 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 13:42:02,815 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 13:42:04,872 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 13:42:06,875 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 13:42:08,529 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 13:42:11,508 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 13:42:13,448 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 13:42:15,981 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 13:42:18,015 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 13:42:19,739 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 13:42:20,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:42:20,031 INFO L93 Difference]: Finished difference Result 298 states and 364 transitions. [2022-03-20 13:42:20,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 13:42:20,031 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 4 states have call successors, (11) Word has length 86 [2022-03-20 13:42:20,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:42:20,033 INFO L225 Difference]: With dead ends: 298 [2022-03-20 13:42:20,033 INFO L226 Difference]: Without dead ends: 288 [2022-03-20 13:42:20,033 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 157 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=57, Invalid=214, Unknown=1, NotChecked=0, Total=272 [2022-03-20 13:42:20,034 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 22 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 19 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.9s IncrementalHoareTripleChecker+Time [2022-03-20 13:42:20,034 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 252 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 321 Invalid, 7 Unknown, 0 Unchecked, 22.9s Time] [2022-03-20 13:42:20,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-03-20 13:42:20,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 283. [2022-03-20 13:42:20,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 173 states have (on average 1.1445086705202312) internal successors, (198), 177 states have internal predecessors, (198), 73 states have call successors, (73), 37 states have call predecessors, (73), 36 states have return successors, (71), 68 states have call predecessors, (71), 71 states have call successors, (71) [2022-03-20 13:42:20,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 342 transitions. [2022-03-20 13:42:20,124 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 342 transitions. Word has length 86 [2022-03-20 13:42:20,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:42:20,125 INFO L478 AbstractCegarLoop]: Abstraction has 283 states and 342 transitions. [2022-03-20 13:42:20,125 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 13:42:20,125 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 342 transitions. [2022-03-20 13:42:20,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-20 13:42:20,126 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:42:20,126 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:42:20,150 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-03-20 13:42:20,343 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-03-20 13:42:20,343 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:42:20,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:42:20,344 INFO L85 PathProgramCache]: Analyzing trace with hash 396850335, now seen corresponding path program 9 times [2022-03-20 13:42:20,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:20,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [47373855] [2022-03-20 13:42:20,344 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:42:20,344 INFO L85 PathProgramCache]: Analyzing trace with hash 396850335, now seen corresponding path program 10 times [2022-03-20 13:42:20,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:42:20,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557181428] [2022-03-20 13:42:20,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:42:20,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:42:20,351 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:42:20,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [853125970] [2022-03-20 13:42:20,352 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:42:20,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:42:20,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:42:20,353 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:42:20,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-20 13:42:20,401 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:42:20,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:42:20,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-20 13:42:20,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:42:22,346 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 70 proven. 112 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2022-03-20 13:42:22,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:42:22,751 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 102 proven. 26 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2022-03-20 13:42:22,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:42:22,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557181428] [2022-03-20 13:42:22,751 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:42:22,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853125970] [2022-03-20 13:42:22,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853125970] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:42:22,751 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:42:22,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 18 [2022-03-20 13:42:22,752 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:42:22,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [47373855] [2022-03-20 13:42:22,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [47373855] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:42:22,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:42:22,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 13:42:22,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530775779] [2022-03-20 13:42:22,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:42:22,752 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 13:42:22,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:22,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 13:42:22,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-03-20 13:42:22,753 INFO L87 Difference]: Start difference. First operand 283 states and 342 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-03-20 13:42:24,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:42:24,067 INFO L93 Difference]: Finished difference Result 313 states and 381 transitions. [2022-03-20 13:42:24,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 13:42:24,067 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) Word has length 99 [2022-03-20 13:42:24,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:42:24,069 INFO L225 Difference]: With dead ends: 313 [2022-03-20 13:42:24,069 INFO L226 Difference]: Without dead ends: 311 [2022-03-20 13:42:24,070 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 178 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-03-20 13:42:24,070 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 16 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:42:24,071 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 436 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-20 13:42:24,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-03-20 13:42:24,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 307. [2022-03-20 13:42:24,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 188 states have (on average 1.148936170212766) internal successors, (216), 192 states have internal predecessors, (216), 79 states have call successors, (79), 40 states have call predecessors, (79), 39 states have return successors, (77), 74 states have call predecessors, (77), 77 states have call successors, (77) [2022-03-20 13:42:24,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 372 transitions. [2022-03-20 13:42:24,161 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 372 transitions. Word has length 99 [2022-03-20 13:42:24,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:42:24,161 INFO L478 AbstractCegarLoop]: Abstraction has 307 states and 372 transitions. [2022-03-20 13:42:24,161 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-03-20 13:42:24,161 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 372 transitions. [2022-03-20 13:42:24,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-20 13:42:24,162 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:42:24,163 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:42:24,186 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-03-20 13:42:24,377 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-20 13:42:24,378 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:42:24,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:42:24,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1783053729, now seen corresponding path program 19 times [2022-03-20 13:42:24,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:24,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [895922808] [2022-03-20 13:42:24,378 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:42:24,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1783053729, now seen corresponding path program 20 times [2022-03-20 13:42:24,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:42:24,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815496866] [2022-03-20 13:42:24,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:42:24,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:42:24,385 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:42:24,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [636425677] [2022-03-20 13:42:24,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:42:24,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:42:24,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:42:24,389 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:42:24,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-20 13:42:24,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:42:24,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:42:24,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-20 13:42:24,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:42:26,492 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 26 proven. 48 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-03-20 13:42:26,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:42:27,407 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 26 proven. 48 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-03-20 13:42:27,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:42:27,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815496866] [2022-03-20 13:42:27,407 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:42:27,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636425677] [2022-03-20 13:42:27,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636425677] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:42:27,407 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:42:27,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-03-20 13:42:27,408 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:42:27,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [895922808] [2022-03-20 13:42:27,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [895922808] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:42:27,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:42:27,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 13:42:27,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336770826] [2022-03-20 13:42:27,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:42:27,408 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 13:42:27,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:27,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 13:42:27,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-03-20 13:42:27,409 INFO L87 Difference]: Start difference. First operand 307 states and 372 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-20 13:42:27,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:42:27,971 INFO L93 Difference]: Finished difference Result 348 states and 422 transitions. [2022-03-20 13:42:27,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 13:42:27,972 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 99 [2022-03-20 13:42:27,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:42:27,974 INFO L225 Difference]: With dead ends: 348 [2022-03-20 13:42:27,974 INFO L226 Difference]: Without dead ends: 346 [2022-03-20 13:42:27,974 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 182 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-03-20 13:42:27,975 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 9 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:42:27,975 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 437 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 13:42:27,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-03-20 13:42:28,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 332. [2022-03-20 13:42:28,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 205 states have (on average 1.146341463414634) internal successors, (235), 208 states have internal predecessors, (235), 83 states have call successors, (83), 44 states have call predecessors, (83), 43 states have return successors, (81), 79 states have call predecessors, (81), 81 states have call successors, (81) [2022-03-20 13:42:28,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 399 transitions. [2022-03-20 13:42:28,061 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 399 transitions. Word has length 99 [2022-03-20 13:42:28,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:42:28,062 INFO L478 AbstractCegarLoop]: Abstraction has 332 states and 399 transitions. [2022-03-20 13:42:28,062 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-20 13:42:28,062 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 399 transitions. [2022-03-20 13:42:28,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-20 13:42:28,063 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:42:28,063 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:42:28,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-20 13:42:28,279 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:42:28,279 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:42:28,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:42:28,280 INFO L85 PathProgramCache]: Analyzing trace with hash 43761953, now seen corresponding path program 21 times [2022-03-20 13:42:28,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:28,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [559514268] [2022-03-20 13:42:28,280 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:42:28,281 INFO L85 PathProgramCache]: Analyzing trace with hash 43761953, now seen corresponding path program 22 times [2022-03-20 13:42:28,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:42:28,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149032301] [2022-03-20 13:42:28,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:42:28,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:42:28,290 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:42:28,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [171001780] [2022-03-20 13:42:28,291 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:42:28,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:42:28,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:42:28,305 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:42:28,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-20 13:42:28,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:42:28,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:42:28,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-20 13:42:28,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:42:29,428 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 80 proven. 84 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2022-03-20 13:42:29,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:42:29,822 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 105 proven. 8 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2022-03-20 13:42:29,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:42:29,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149032301] [2022-03-20 13:42:29,822 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:42:29,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171001780] [2022-03-20 13:42:29,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171001780] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:42:29,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:42:29,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-03-20 13:42:29,823 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:42:29,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [559514268] [2022-03-20 13:42:29,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [559514268] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:42:29,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:42:29,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 13:42:29,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420833773] [2022-03-20 13:42:29,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:42:29,823 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 13:42:29,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:29,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 13:42:29,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-03-20 13:42:29,824 INFO L87 Difference]: Start difference. First operand 332 states and 399 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-20 13:42:30,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:42:30,820 INFO L93 Difference]: Finished difference Result 366 states and 441 transitions. [2022-03-20 13:42:30,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 13:42:30,820 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 99 [2022-03-20 13:42:30,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:42:30,822 INFO L225 Difference]: With dead ends: 366 [2022-03-20 13:42:30,822 INFO L226 Difference]: Without dead ends: 364 [2022-03-20 13:42:30,823 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 181 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-03-20 13:42:30,823 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 14 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 13:42:30,823 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 350 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 13:42:30,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-03-20 13:42:30,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 350. [2022-03-20 13:42:30,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 217 states have (on average 1.1428571428571428) internal successors, (248), 220 states have internal predecessors, (248), 86 states have call successors, (86), 47 states have call predecessors, (86), 46 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2022-03-20 13:42:30,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 418 transitions. [2022-03-20 13:42:30,925 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 418 transitions. Word has length 99 [2022-03-20 13:42:30,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:42:30,926 INFO L478 AbstractCegarLoop]: Abstraction has 350 states and 418 transitions. [2022-03-20 13:42:30,926 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-20 13:42:30,926 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 418 transitions. [2022-03-20 13:42:30,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-20 13:42:30,927 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:42:30,927 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:42:30,957 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-03-20 13:42:31,143 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:42:31,143 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:42:31,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:42:31,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1429965347, now seen corresponding path program 23 times [2022-03-20 13:42:31,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:31,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [700507242] [2022-03-20 13:42:31,144 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:42:31,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1429965347, now seen corresponding path program 24 times [2022-03-20 13:42:31,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:42:31,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465840997] [2022-03-20 13:42:31,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:42:31,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:42:31,150 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:42:31,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1082409623] [2022-03-20 13:42:31,151 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:42:31,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:42:31,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:42:31,152 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) [2022-03-20 13:42:31,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-20 13:42:31,766 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 13:42:31,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:42:31,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-20 13:42:31,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:42:33,022 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 105 proven. 33 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2022-03-20 13:42:33,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:42:33,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:42:33,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465840997] [2022-03-20 13:42:33,488 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:42:33,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082409623] [2022-03-20 13:42:33,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082409623] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:42:33,488 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 13:42:33,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-20 13:42:33,488 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:42:33,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [700507242] [2022-03-20 13:42:33,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [700507242] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:42:33,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:42:33,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 13:42:33,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656883691] [2022-03-20 13:42:33,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:42:33,489 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 13:42:33,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:33,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 13:42:33,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-03-20 13:42:33,489 INFO L87 Difference]: Start difference. First operand 350 states and 418 transitions. Second operand has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 13:42:37,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:42:37,231 INFO L93 Difference]: Finished difference Result 422 states and 520 transitions. [2022-03-20 13:42:37,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 13:42:37,232 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) Word has length 99 [2022-03-20 13:42:37,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:42:37,234 INFO L225 Difference]: With dead ends: 422 [2022-03-20 13:42:37,234 INFO L226 Difference]: Without dead ends: 416 [2022-03-20 13:42:37,235 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2022-03-20 13:42:37,235 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 35 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:42:37,235 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 241 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-03-20 13:42:37,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2022-03-20 13:42:37,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 397. [2022-03-20 13:42:37,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 243 states have (on average 1.1481481481481481) internal successors, (279), 247 states have internal predecessors, (279), 102 states have call successors, (102), 52 states have call predecessors, (102), 51 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) [2022-03-20 13:42:37,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 481 transitions. [2022-03-20 13:42:37,353 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 481 transitions. Word has length 99 [2022-03-20 13:42:37,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:42:37,353 INFO L478 AbstractCegarLoop]: Abstraction has 397 states and 481 transitions. [2022-03-20 13:42:37,353 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 13:42:37,353 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 481 transitions. [2022-03-20 13:42:37,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-20 13:42:37,355 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:42:37,355 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:42:37,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-20 13:42:37,560 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-20 13:42:37,560 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:42:37,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:42:37,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1289329503, now seen corresponding path program 25 times [2022-03-20 13:42:37,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:37,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1179488722] [2022-03-20 13:42:37,561 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:42:37,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1289329503, now seen corresponding path program 26 times [2022-03-20 13:42:37,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:42:37,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802431317] [2022-03-20 13:42:37,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:42:37,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:42:37,566 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:42:37,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1926734513] [2022-03-20 13:42:37,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:42:37,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:42:37,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:42:37,568 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) [2022-03-20 13:42:37,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-20 13:42:37,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:42:37,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:42:37,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-20 13:42:37,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:42:39,361 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 98 proven. 66 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2022-03-20 13:42:39,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:42:43,169 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 105 proven. 8 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2022-03-20 13:42:43,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:42:43,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802431317] [2022-03-20 13:42:43,170 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:42:43,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926734513] [2022-03-20 13:42:43,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926734513] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:42:43,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:42:43,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-03-20 13:42:43,170 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:42:43,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1179488722] [2022-03-20 13:42:43,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1179488722] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:42:43,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:42:43,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 13:42:43,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219861042] [2022-03-20 13:42:43,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:42:43,171 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 13:42:43,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:43,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 13:42:43,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-03-20 13:42:43,172 INFO L87 Difference]: Start difference. First operand 397 states and 481 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-20 13:42:45,919 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 13:42:47,920 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 13:42:49,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:42:49,287 INFO L93 Difference]: Finished difference Result 427 states and 520 transitions. [2022-03-20 13:42:49,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 13:42:49,287 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 99 [2022-03-20 13:42:49,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:42:49,290 INFO L225 Difference]: With dead ends: 427 [2022-03-20 13:42:49,290 INFO L226 Difference]: Without dead ends: 425 [2022-03-20 13:42:49,290 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 180 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-03-20 13:42:49,291 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 14 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:42:49,292 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 394 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 461 Invalid, 1 Unknown, 0 Unchecked, 6.0s Time] [2022-03-20 13:42:49,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2022-03-20 13:42:49,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 401. [2022-03-20 13:42:49,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 246 states have (on average 1.146341463414634) internal successors, (282), 250 states have internal predecessors, (282), 102 states have call successors, (102), 53 states have call predecessors, (102), 52 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) [2022-03-20 13:42:49,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 484 transitions. [2022-03-20 13:42:49,402 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 484 transitions. Word has length 99 [2022-03-20 13:42:49,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:42:49,403 INFO L478 AbstractCegarLoop]: Abstraction has 401 states and 484 transitions. [2022-03-20 13:42:49,403 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-20 13:42:49,403 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 484 transitions. [2022-03-20 13:42:49,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-20 13:42:49,404 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:42:49,404 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:42:49,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-20 13:42:49,632 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-20 13:42:49,632 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:42:49,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:42:49,633 INFO L85 PathProgramCache]: Analyzing trace with hash 96873891, now seen corresponding path program 27 times [2022-03-20 13:42:49,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:49,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [165183720] [2022-03-20 13:42:49,633 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:42:49,633 INFO L85 PathProgramCache]: Analyzing trace with hash 96873891, now seen corresponding path program 28 times [2022-03-20 13:42:49,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:42:49,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509533474] [2022-03-20 13:42:49,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:42:49,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:42:49,640 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:42:49,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [991417166] [2022-03-20 13:42:49,640 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:42:49,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:42:49,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:42:49,643 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) [2022-03-20 13:42:49,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-20 13:42:49,696 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:42:49,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:42:49,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-20 13:42:49,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:42:50,668 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 84 proven. 56 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2022-03-20 13:42:50,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:42:51,006 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 105 proven. 8 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2022-03-20 13:42:51,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:42:51,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509533474] [2022-03-20 13:42:51,006 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:42:51,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991417166] [2022-03-20 13:42:51,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991417166] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:42:51,007 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:42:51,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 17 [2022-03-20 13:42:51,007 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:42:51,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [165183720] [2022-03-20 13:42:51,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [165183720] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:42:51,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:42:51,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 13:42:51,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558089806] [2022-03-20 13:42:51,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:42:51,007 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 13:42:51,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:51,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 13:42:51,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-03-20 13:42:51,008 INFO L87 Difference]: Start difference. First operand 401 states and 484 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-20 13:42:53,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:42:53,235 INFO L93 Difference]: Finished difference Result 437 states and 539 transitions. [2022-03-20 13:42:53,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 13:42:53,236 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) Word has length 99 [2022-03-20 13:42:53,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:42:53,238 INFO L225 Difference]: With dead ends: 437 [2022-03-20 13:42:53,238 INFO L226 Difference]: Without dead ends: 431 [2022-03-20 13:42:53,239 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-03-20 13:42:53,239 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 15 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:42:53,239 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 426 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-03-20 13:42:53,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2022-03-20 13:42:53,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 417. [2022-03-20 13:42:53,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 255 states have (on average 1.1529411764705881) internal successors, (294), 259 states have internal predecessors, (294), 108 states have call successors, (108), 54 states have call predecessors, (108), 53 states have return successors, (106), 103 states have call predecessors, (106), 106 states have call successors, (106) [2022-03-20 13:42:53,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 508 transitions. [2022-03-20 13:42:53,345 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 508 transitions. Word has length 99 [2022-03-20 13:42:53,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:42:53,345 INFO L478 AbstractCegarLoop]: Abstraction has 417 states and 508 transitions. [2022-03-20 13:42:53,345 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-20 13:42:53,345 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 508 transitions. [2022-03-20 13:42:53,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-20 13:42:53,347 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:42:53,347 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:42:53,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-20 13:42:53,563 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-20 13:42:53,563 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:42:53,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:42:53,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1642417885, now seen corresponding path program 29 times [2022-03-20 13:42:53,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:53,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [557164490] [2022-03-20 13:42:53,564 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:42:53,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1642417885, now seen corresponding path program 30 times [2022-03-20 13:42:53,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:42:53,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224834364] [2022-03-20 13:42:53,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:42:53,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:42:53,578 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:42:53,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [73493008] [2022-03-20 13:42:53,578 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:42:53,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:42:53,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:42:53,580 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) [2022-03-20 13:42:53,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-20 13:42:53,632 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 13:42:53,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:42:53,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-20 13:42:53,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:42:54,064 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 60 proven. 70 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2022-03-20 13:42:54,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:43:02,462 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 74 proven. 46 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2022-03-20 13:43:02,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:43:02,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224834364] [2022-03-20 13:43:02,463 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:43:02,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73493008] [2022-03-20 13:43:02,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73493008] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:43:02,463 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:43:02,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2022-03-20 13:43:02,463 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:43:02,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [557164490] [2022-03-20 13:43:02,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [557164490] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:43:02,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:43:02,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 13:43:02,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192110076] [2022-03-20 13:43:02,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:43:02,464 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 13:43:02,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:43:02,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 13:43:02,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=162, Unknown=2, NotChecked=0, Total=210 [2022-03-20 13:43:02,464 INFO L87 Difference]: Start difference. First operand 417 states and 508 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 13:43:04,743 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 13:43:05,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:43:05,294 INFO L93 Difference]: Finished difference Result 474 states and 583 transitions. [2022-03-20 13:43:05,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 13:43:05,295 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 99 [2022-03-20 13:43:05,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:43:05,297 INFO L225 Difference]: With dead ends: 474 [2022-03-20 13:43:05,297 INFO L226 Difference]: Without dead ends: 472 [2022-03-20 13:43:05,298 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 181 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=59, Invalid=211, Unknown=2, NotChecked=0, Total=272 [2022-03-20 13:43:05,298 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 20 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 16 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-03-20 13:43:05,298 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 164 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 265 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2022-03-20 13:43:05,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-03-20 13:43:05,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 403. [2022-03-20 13:43:05,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 246 states have (on average 1.146341463414634) internal successors, (282), 253 states have internal predecessors, (282), 104 states have call successors, (104), 53 states have call predecessors, (104), 52 states have return successors, (102), 96 states have call predecessors, (102), 102 states have call successors, (102) [2022-03-20 13:43:05,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 488 transitions. [2022-03-20 13:43:05,449 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 488 transitions. Word has length 99 [2022-03-20 13:43:05,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:43:05,450 INFO L478 AbstractCegarLoop]: Abstraction has 403 states and 488 transitions. [2022-03-20 13:43:05,450 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 13:43:05,450 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 488 transitions. [2022-03-20 13:43:05,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-20 13:43:05,451 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:43:05,451 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:43:05,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-20 13:43:05,675 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-20 13:43:05,675 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:43:05,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:43:05,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1917559763, now seen corresponding path program 31 times [2022-03-20 13:43:05,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:43:05,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1208997852] [2022-03-20 13:43:05,676 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:43:05,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1917559763, now seen corresponding path program 32 times [2022-03-20 13:43:05,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:43:05,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717572171] [2022-03-20 13:43:05,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:43:05,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:43:05,686 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:43:05,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [553585862] [2022-03-20 13:43:05,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:43:05,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:43:05,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:43:05,689 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:43:05,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-20 13:43:05,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:43:05,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:43:05,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 13:43:05,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:43:06,269 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 28 proven. 52 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2022-03-20 13:43:06,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:43:06,536 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 28 proven. 52 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2022-03-20 13:43:06,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:43:06,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717572171] [2022-03-20 13:43:06,537 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:43:06,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553585862] [2022-03-20 13:43:06,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553585862] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:43:06,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:43:06,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-03-20 13:43:06,537 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:43:06,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1208997852] [2022-03-20 13:43:06,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1208997852] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:43:06,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:43:06,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 13:43:06,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832507730] [2022-03-20 13:43:06,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:43:06,538 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 13:43:06,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:43:06,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 13:43:06,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-03-20 13:43:06,538 INFO L87 Difference]: Start difference. First operand 403 states and 488 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 6 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-20 13:43:06,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:43:06,864 INFO L93 Difference]: Finished difference Result 429 states and 525 transitions. [2022-03-20 13:43:06,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 13:43:06,865 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 6 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 104 [2022-03-20 13:43:06,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:43:06,867 INFO L225 Difference]: With dead ends: 429 [2022-03-20 13:43:06,867 INFO L226 Difference]: Without dead ends: 423 [2022-03-20 13:43:06,867 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-03-20 13:43:06,867 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 8 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:43:06,868 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 378 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:43:06,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-03-20 13:43:06,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 423. [2022-03-20 13:43:06,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 258 states have (on average 1.1472868217054264) internal successors, (296), 265 states have internal predecessors, (296), 110 states have call successors, (110), 55 states have call predecessors, (110), 54 states have return successors, (108), 102 states have call predecessors, (108), 108 states have call successors, (108) [2022-03-20 13:43:06,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 514 transitions. [2022-03-20 13:43:06,989 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 514 transitions. Word has length 104 [2022-03-20 13:43:06,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:43:06,989 INFO L478 AbstractCegarLoop]: Abstraction has 423 states and 514 transitions. [2022-03-20 13:43:06,989 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 6 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-20 13:43:06,989 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 514 transitions. [2022-03-20 13:43:06,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-20 13:43:06,990 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:43:06,990 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:43:07,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-20 13:43:07,191 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-20 13:43:07,191 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:43:07,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:43:07,191 INFO L85 PathProgramCache]: Analyzing trace with hash -326423535, now seen corresponding path program 33 times [2022-03-20 13:43:07,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:43:07,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [268535424] [2022-03-20 13:43:07,192 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:43:07,192 INFO L85 PathProgramCache]: Analyzing trace with hash -326423535, now seen corresponding path program 34 times [2022-03-20 13:43:07,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:43:07,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419216045] [2022-03-20 13:43:07,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:43:07,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:43:07,197 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:43:07,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [593705701] [2022-03-20 13:43:07,198 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:43:07,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:43:07,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:43:07,199 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:43:07,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-20 13:43:07,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:43:07,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:43:07,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-20 13:43:07,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:43:08,448 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 104 proven. 114 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2022-03-20 13:43:08,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:43:08,866 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 117 proven. 5 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2022-03-20 13:43:08,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:43:08,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419216045] [2022-03-20 13:43:08,866 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:43:08,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593705701] [2022-03-20 13:43:08,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593705701] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:43:08,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:43:08,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10] total 23 [2022-03-20 13:43:08,866 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:43:08,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [268535424] [2022-03-20 13:43:08,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [268535424] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:43:08,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:43:08,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 13:43:08,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205765342] [2022-03-20 13:43:08,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:43:08,867 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 13:43:08,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:43:08,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 13:43:08,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2022-03-20 13:43:08,868 INFO L87 Difference]: Start difference. First operand 423 states and 514 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 9 states have call predecessors, (17), 8 states have call successors, (17) [2022-03-20 13:43:09,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:43:09,964 INFO L93 Difference]: Finished difference Result 463 states and 573 transitions. [2022-03-20 13:43:09,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 13:43:09,965 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 9 states have call predecessors, (17), 8 states have call successors, (17) Word has length 104 [2022-03-20 13:43:09,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:43:09,968 INFO L225 Difference]: With dead ends: 463 [2022-03-20 13:43:09,968 INFO L226 Difference]: Without dead ends: 451 [2022-03-20 13:43:09,969 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 182 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2022-03-20 13:43:09,970 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 31 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 13:43:09,970 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 325 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 684 Invalid, 0 Unknown, 21 Unchecked, 0.9s Time] [2022-03-20 13:43:09,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2022-03-20 13:43:10,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 420. [2022-03-20 13:43:10,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 256 states have (on average 1.15234375) internal successors, (295), 261 states have internal predecessors, (295), 110 states have call successors, (110), 54 states have call predecessors, (110), 53 states have return successors, (108), 104 states have call predecessors, (108), 108 states have call successors, (108) [2022-03-20 13:43:10,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 513 transitions. [2022-03-20 13:43:10,145 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 513 transitions. Word has length 104 [2022-03-20 13:43:10,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:43:10,145 INFO L478 AbstractCegarLoop]: Abstraction has 420 states and 513 transitions. [2022-03-20 13:43:10,145 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 9 states have call predecessors, (17), 8 states have call successors, (17) [2022-03-20 13:43:10,145 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 513 transitions. [2022-03-20 13:43:10,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-20 13:43:10,152 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:43:10,152 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:43:10,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-20 13:43:10,379 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:43:10,379 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:43:10,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:43:10,380 INFO L85 PathProgramCache]: Analyzing trace with hash -839067503, now seen corresponding path program 35 times [2022-03-20 13:43:10,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:43:10,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1089359953] [2022-03-20 13:43:10,380 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:43:10,380 INFO L85 PathProgramCache]: Analyzing trace with hash -839067503, now seen corresponding path program 36 times [2022-03-20 13:43:10,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:43:10,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188868336] [2022-03-20 13:43:10,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:43:10,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:43:10,388 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:43:10,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [28870621] [2022-03-20 13:43:10,388 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:43:10,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:43:10,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:43:10,389 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:43:10,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-20 13:43:10,936 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 13:43:10,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:43:10,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-20 13:43:10,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:43:22,413 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 127 proven. 49 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2022-03-20 13:43:22,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:43:23,050 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 146 proven. 3 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2022-03-20 13:43:23,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:43:23,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188868336] [2022-03-20 13:43:23,050 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:43:23,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28870621] [2022-03-20 13:43:23,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28870621] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:43:23,051 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:43:23,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 23 [2022-03-20 13:43:23,051 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:43:23,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1089359953] [2022-03-20 13:43:23,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1089359953] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:43:23,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:43:23,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 13:43:23,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85341005] [2022-03-20 13:43:23,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:43:23,056 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 13:43:23,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:43:23,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 13:43:23,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=401, Unknown=2, NotChecked=0, Total=506 [2022-03-20 13:43:23,057 INFO L87 Difference]: Start difference. First operand 420 states and 513 transitions. Second operand has 17 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 8 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-20 13:43:26,876 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 13:43:29,015 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 13:44:07,029 WARN L232 SmtUtils]: Spent 37.84s on a formula simplification. DAG size of input: 62 DAG size of output: 50 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 13:44:09,035 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 13:44:11,040 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 13:44:12,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:44:12,326 INFO L93 Difference]: Finished difference Result 493 states and 614 transitions. [2022-03-20 13:44:12,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 13:44:12,327 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 8 states have call predecessors, (14), 6 states have call successors, (14) Word has length 104 [2022-03-20 13:44:12,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:44:12,329 INFO L225 Difference]: With dead ends: 493 [2022-03-20 13:44:12,329 INFO L226 Difference]: Without dead ends: 483 [2022-03-20 13:44:12,329 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 185 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 44.8s TimeCoverageRelationStatistics Valid=131, Invalid=569, Unknown=2, NotChecked=0, Total=702 [2022-03-20 13:44:12,330 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 27 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 27 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:44:12,330 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 448 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 589 Invalid, 4 Unknown, 0 Unchecked, 11.1s Time] [2022-03-20 13:44:12,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-03-20 13:44:12,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 449. [2022-03-20 13:44:12,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 276 states have (on average 1.144927536231884) internal successors, (316), 281 states have internal predecessors, (316), 114 states have call successors, (114), 59 states have call predecessors, (114), 58 states have return successors, (112), 108 states have call predecessors, (112), 112 states have call successors, (112) [2022-03-20 13:44:12,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 542 transitions. [2022-03-20 13:44:12,479 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 542 transitions. Word has length 104 [2022-03-20 13:44:12,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:44:12,480 INFO L478 AbstractCegarLoop]: Abstraction has 449 states and 542 transitions. [2022-03-20 13:44:12,480 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 8 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-20 13:44:12,480 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 542 transitions. [2022-03-20 13:44:12,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-20 13:44:12,481 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:44:12,481 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:44:12,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-20 13:44:12,688 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-03-20 13:44:12,688 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:44:12,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:44:12,689 INFO L85 PathProgramCache]: Analyzing trace with hash -468949743, now seen corresponding path program 37 times [2022-03-20 13:44:12,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:44:12,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1275859674] [2022-03-20 13:44:12,689 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:44:12,689 INFO L85 PathProgramCache]: Analyzing trace with hash -468949743, now seen corresponding path program 38 times [2022-03-20 13:44:12,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:44:12,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517415122] [2022-03-20 13:44:12,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:44:12,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:44:12,695 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:44:12,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1832642360] [2022-03-20 13:44:12,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:44:12,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:44:12,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:44:12,697 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:44:12,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-20 13:44:12,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:44:12,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:44:12,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-20 13:44:12,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:44:13,360 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 76 proven. 103 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-03-20 13:44:13,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:44:13,751 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 111 proven. 28 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2022-03-20 13:44:13,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:44:13,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517415122] [2022-03-20 13:44:13,751 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:44:13,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832642360] [2022-03-20 13:44:13,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832642360] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:44:13,752 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:44:13,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-03-20 13:44:13,752 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:44:13,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1275859674] [2022-03-20 13:44:13,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1275859674] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:44:13,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:44:13,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 13:44:13,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453367922] [2022-03-20 13:44:13,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:44:13,753 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 13:44:13,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:44:13,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 13:44:13,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-03-20 13:44:13,753 INFO L87 Difference]: Start difference. First operand 449 states and 542 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) [2022-03-20 13:44:14,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:44:14,972 INFO L93 Difference]: Finished difference Result 471 states and 576 transitions. [2022-03-20 13:44:14,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 13:44:14,973 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) Word has length 104 [2022-03-20 13:44:14,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:44:14,975 INFO L225 Difference]: With dead ends: 471 [2022-03-20 13:44:14,975 INFO L226 Difference]: Without dead ends: 465 [2022-03-20 13:44:14,976 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 190 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-03-20 13:44:14,976 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 13 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:44:14,976 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 372 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 13:44:14,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2022-03-20 13:44:15,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 437. [2022-03-20 13:44:15,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 268 states have (on average 1.1455223880597014) internal successors, (307), 274 states have internal predecessors, (307), 112 states have call successors, (112), 57 states have call predecessors, (112), 56 states have return successors, (110), 105 states have call predecessors, (110), 110 states have call successors, (110) [2022-03-20 13:44:15,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 529 transitions. [2022-03-20 13:44:15,148 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 529 transitions. Word has length 104 [2022-03-20 13:44:15,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:44:15,148 INFO L478 AbstractCegarLoop]: Abstraction has 437 states and 529 transitions. [2022-03-20 13:44:15,148 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) [2022-03-20 13:44:15,148 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 529 transitions. [2022-03-20 13:44:15,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-20 13:44:15,149 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:44:15,150 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:44:15,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-20 13:44:15,363 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:44:15,363 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:44:15,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:44:15,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1582034255, now seen corresponding path program 39 times [2022-03-20 13:44:15,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:44:15,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1664542274] [2022-03-20 13:44:15,364 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:44:15,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1582034255, now seen corresponding path program 40 times [2022-03-20 13:44:15,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:44:15,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070710833] [2022-03-20 13:44:15,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:44:15,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:44:15,371 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:44:15,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [818374150] [2022-03-20 13:44:15,371 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:44:15,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:44:15,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:44:15,373 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:44:15,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-20 13:44:15,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:44:15,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:44:15,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-20 13:44:15,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:44:16,002 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 107 proven. 108 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2022-03-20 13:44:16,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:44:16,332 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 117 proven. 5 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2022-03-20 13:44:16,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:44:16,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070710833] [2022-03-20 13:44:16,333 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:44:16,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818374150] [2022-03-20 13:44:16,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818374150] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:44:16,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:44:16,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 15 [2022-03-20 13:44:16,333 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:44:16,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1664542274] [2022-03-20 13:44:16,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1664542274] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:44:16,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:44:16,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 13:44:16,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652961329] [2022-03-20 13:44:16,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:44:16,333 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 13:44:16,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:44:16,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 13:44:16,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-03-20 13:44:16,334 INFO L87 Difference]: Start difference. First operand 437 states and 529 transitions. Second operand has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-20 13:44:17,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:44:17,239 INFO L93 Difference]: Finished difference Result 475 states and 579 transitions. [2022-03-20 13:44:17,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 13:44:17,240 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) Word has length 104 [2022-03-20 13:44:17,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:44:17,242 INFO L225 Difference]: With dead ends: 475 [2022-03-20 13:44:17,242 INFO L226 Difference]: Without dead ends: 465 [2022-03-20 13:44:17,242 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 190 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-03-20 13:44:17,242 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 20 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 13:44:17,243 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 360 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 13:44:17,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2022-03-20 13:44:17,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 452. [2022-03-20 13:44:17,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 278 states have (on average 1.1402877697841727) internal successors, (317), 285 states have internal predecessors, (317), 114 states have call successors, (114), 60 states have call predecessors, (114), 59 states have return successors, (112), 106 states have call predecessors, (112), 112 states have call successors, (112) [2022-03-20 13:44:17,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 543 transitions. [2022-03-20 13:44:17,373 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 543 transitions. Word has length 104 [2022-03-20 13:44:17,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:44:17,374 INFO L478 AbstractCegarLoop]: Abstraction has 452 states and 543 transitions. [2022-03-20 13:44:17,374 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-20 13:44:17,374 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 543 transitions. [2022-03-20 13:44:17,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-03-20 13:44:17,375 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:44:17,375 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 6, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:44:17,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-20 13:44:17,575 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:44:17,576 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:44:17,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:44:17,576 INFO L85 PathProgramCache]: Analyzing trace with hash -567590240, now seen corresponding path program 11 times [2022-03-20 13:44:17,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:44:17,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1675490086] [2022-03-20 13:44:17,576 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:44:17,577 INFO L85 PathProgramCache]: Analyzing trace with hash -567590240, now seen corresponding path program 12 times [2022-03-20 13:44:17,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:44:17,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676596781] [2022-03-20 13:44:17,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:44:17,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:44:17,582 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:44:17,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [929579826] [2022-03-20 13:44:17,582 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:44:17,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:44:17,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:44:17,583 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:44:17,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-20 13:44:17,631 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 13:44:17,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:44:17,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 13:44:17,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:44:17,979 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 123 proven. 20 refuted. 0 times theorem prover too weak. 448 trivial. 0 not checked. [2022-03-20 13:44:17,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:44:18,180 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:45:32,761 WARN L855 $PredicateComparison]: unable to prove that (forall ((v_main_~r~0_BEFORE_CALL_453 Int) (v_main_~p~0_BEFORE_CALL_447 Int) (v_main_~s~0_BEFORE_CALL_405 Int) (v_main_~q~0_BEFORE_CALL_420 Int)) (or (not (= (+ (* (+ (* (- 1) v_main_~s~0_BEFORE_CALL_405) v_main_~r~0_BEFORE_CALL_453) v_main_~q~0_BEFORE_CALL_420) 1) (* (+ v_main_~p~0_BEFORE_CALL_447 (* (- 1) v_main_~q~0_BEFORE_CALL_420)) v_main_~s~0_BEFORE_CALL_405))) (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (let ((.cse0 (+ (* v_main_~r~0_BEFORE_CALL_453 v_main_~q~0_BEFORE_CALL_420) 1))) (or (= .cse0 0) (not (= |c___VERIFIER_assert_#in~cond| 1)) (= (mod .cse0 v_main_~s~0_BEFORE_CALL_405) 0)))))) is different from true [2022-03-20 13:46:38,260 WARN L855 $PredicateComparison]: unable to prove that (or (forall ((v_main_~r~0_BEFORE_CALL_453 Int) (v_main_~p~0_BEFORE_CALL_447 Int) (v_main_~s~0_BEFORE_CALL_405 Int) (v_main_~q~0_BEFORE_CALL_420 Int)) (or (not (= (+ (* (+ (* (- 1) v_main_~s~0_BEFORE_CALL_405) v_main_~r~0_BEFORE_CALL_453) v_main_~q~0_BEFORE_CALL_420) 1) (* (+ v_main_~p~0_BEFORE_CALL_447 (* (- 1) v_main_~q~0_BEFORE_CALL_420)) v_main_~s~0_BEFORE_CALL_405))) (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (let ((.cse0 (+ (* v_main_~r~0_BEFORE_CALL_453 v_main_~q~0_BEFORE_CALL_420) 1))) (or (= .cse0 0) (not (= |c___VERIFIER_assert_#in~cond| 1)) (= (mod .cse0 v_main_~s~0_BEFORE_CALL_405) 0)))))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-03-20 13:46:56,309 WARN L855 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (forall ((v_main_~r~0_BEFORE_CALL_453 Int) (v_main_~p~0_BEFORE_CALL_447 Int) (v_main_~s~0_BEFORE_CALL_405 Int) (v_main_~q~0_BEFORE_CALL_420 Int)) (let ((.cse0 (+ (* v_main_~r~0_BEFORE_CALL_453 v_main_~q~0_BEFORE_CALL_420) 1))) (or (= .cse0 0) (= (mod .cse0 v_main_~s~0_BEFORE_CALL_405) 0) (not (= (+ (* (+ (* (- 1) v_main_~s~0_BEFORE_CALL_405) v_main_~r~0_BEFORE_CALL_453) v_main_~q~0_BEFORE_CALL_420) 1) (* (+ v_main_~p~0_BEFORE_CALL_447 (* (- 1) v_main_~q~0_BEFORE_CALL_420)) v_main_~s~0_BEFORE_CALL_405))))))) is different from true [2022-03-20 13:47:07,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:47:07,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676596781] [2022-03-20 13:47:07,115 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:47:07,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929579826] [2022-03-20 13:47:07,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929579826] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:47:07,115 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 13:47:07,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-20 13:47:07,115 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:47:07,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1675490086] [2022-03-20 13:47:07,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1675490086] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:47:07,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:47:07,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 13:47:07,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940279648] [2022-03-20 13:47:07,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:47:07,116 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 13:47:07,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:47:07,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 13:47:07,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=192, Unknown=7, NotChecked=90, Total=342 [2022-03-20 13:47:07,117 INFO L87 Difference]: Start difference. First operand 452 states and 543 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-20 13:47:07,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:47:07,601 INFO L93 Difference]: Finished difference Result 513 states and 625 transitions. [2022-03-20 13:47:07,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 13:47:07,602 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 117 [2022-03-20 13:47:07,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:47:07,605 INFO L225 Difference]: With dead ends: 513 [2022-03-20 13:47:07,605 INFO L226 Difference]: Without dead ends: 511 [2022-03-20 13:47:07,606 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 20.2s TimeCoverageRelationStatistics Valid=77, Invalid=270, Unknown=7, NotChecked=108, Total=462 [2022-03-20 13:47:07,606 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 20 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:47:07,606 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 160 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:47:07,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-03-20 13:47:07,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 473. [2022-03-20 13:47:07,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 292 states have (on average 1.143835616438356) internal successors, (334), 298 states have internal predecessors, (334), 118 states have call successors, (118), 63 states have call predecessors, (118), 62 states have return successors, (116), 111 states have call predecessors, (116), 116 states have call successors, (116) [2022-03-20 13:47:07,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 568 transitions. [2022-03-20 13:47:07,794 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 568 transitions. Word has length 117 [2022-03-20 13:47:07,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:47:07,794 INFO L478 AbstractCegarLoop]: Abstraction has 473 states and 568 transitions. [2022-03-20 13:47:07,794 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-20 13:47:07,794 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 568 transitions. [2022-03-20 13:47:07,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-03-20 13:47:07,796 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:47:07,796 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 6, 5, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:47:07,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-20 13:47:08,007 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-03-20 13:47:08,007 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:47:08,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:47:08,008 INFO L85 PathProgramCache]: Analyzing trace with hash 818613154, now seen corresponding path program 41 times [2022-03-20 13:47:08,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:47:08,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1261418520] [2022-03-20 13:47:08,008 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:47:08,008 INFO L85 PathProgramCache]: Analyzing trace with hash 818613154, now seen corresponding path program 42 times [2022-03-20 13:47:08,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:47:08,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642962387] [2022-03-20 13:47:08,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:47:08,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:47:08,013 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:47:08,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1687738378] [2022-03-20 13:47:08,014 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:47:08,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:47:08,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:47:08,017 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:47:08,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-20 13:47:08,077 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 13:47:08,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:47:08,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-20 13:47:08,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:47:08,574 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 73 proven. 43 refuted. 0 times theorem prover too weak. 475 trivial. 0 not checked. [2022-03-20 13:47:08,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:47:12,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:47:12,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642962387] [2022-03-20 13:47:12,899 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:47:12,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687738378] [2022-03-20 13:47:12,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687738378] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:47:12,899 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 13:47:12,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-20 13:47:12,899 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:47:12,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1261418520] [2022-03-20 13:47:12,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1261418520] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:47:12,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:47:12,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 13:47:12,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130428225] [2022-03-20 13:47:12,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:47:12,900 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 13:47:12,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:47:12,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 13:47:12,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=168, Unknown=2, NotChecked=0, Total=210 [2022-03-20 13:47:12,900 INFO L87 Difference]: Start difference. First operand 473 states and 568 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-20 13:47:14,995 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 13:47:16,998 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 13:47:17,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:47:17,778 INFO L93 Difference]: Finished difference Result 570 states and 706 transitions. [2022-03-20 13:47:17,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 13:47:17,778 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 117 [2022-03-20 13:47:17,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:47:17,781 INFO L225 Difference]: With dead ends: 570 [2022-03-20 13:47:17,781 INFO L226 Difference]: Without dead ends: 564 [2022-03-20 13:47:17,781 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=53, Invalid=217, Unknown=2, NotChecked=0, Total=272 [2022-03-20 13:47:17,781 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 15 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-03-20 13:47:17,782 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 251 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 290 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2022-03-20 13:47:17,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-03-20 13:47:17,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 527. [2022-03-20 13:47:17,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 323 states have (on average 1.1486068111455108) internal successors, (371), 330 states have internal predecessors, (371), 136 states have call successors, (136), 68 states have call predecessors, (136), 67 states have return successors, (134), 128 states have call predecessors, (134), 134 states have call successors, (134) [2022-03-20 13:47:17,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 641 transitions. [2022-03-20 13:47:17,982 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 641 transitions. Word has length 117 [2022-03-20 13:47:17,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:47:17,982 INFO L478 AbstractCegarLoop]: Abstraction has 527 states and 641 transitions. [2022-03-20 13:47:17,982 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-20 13:47:17,983 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 641 transitions. [2022-03-20 13:47:17,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-03-20 13:47:17,984 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:47:17,984 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 6, 5, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:47:18,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-20 13:47:18,185 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-20 13:47:18,185 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:47:18,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:47:18,185 INFO L85 PathProgramCache]: Analyzing trace with hash -920678622, now seen corresponding path program 43 times [2022-03-20 13:47:18,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:47:18,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1972756735] [2022-03-20 13:47:18,186 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:47:18,186 INFO L85 PathProgramCache]: Analyzing trace with hash -920678622, now seen corresponding path program 44 times [2022-03-20 13:47:18,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:47:18,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578760172] [2022-03-20 13:47:18,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:47:18,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:47:18,192 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:47:18,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [864393245] [2022-03-20 13:47:18,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:47:18,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:47:18,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:47:18,195 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:47:18,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-20 13:47:18,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:47:18,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:47:18,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-20 13:47:18,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:47:20,584 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 126 proven. 149 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-03-20 13:47:20,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:47:21,029 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 135 proven. 8 refuted. 0 times theorem prover too weak. 448 trivial. 0 not checked. [2022-03-20 13:47:21,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:47:21,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578760172] [2022-03-20 13:47:21,030 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:47:21,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864393245] [2022-03-20 13:47:21,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864393245] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:47:21,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:47:21,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 20 [2022-03-20 13:47:21,030 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:47:21,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1972756735] [2022-03-20 13:47:21,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1972756735] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:47:21,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:47:21,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 13:47:21,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476364752] [2022-03-20 13:47:21,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:47:21,030 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 13:47:21,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:47:21,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 13:47:21,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-03-20 13:47:21,031 INFO L87 Difference]: Start difference. First operand 527 states and 641 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 14 states have internal predecessors, (35), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 9 states have call predecessors, (19), 8 states have call successors, (19) [2022-03-20 13:47:23,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:47:23,810 INFO L93 Difference]: Finished difference Result 565 states and 686 transitions. [2022-03-20 13:47:23,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 13:47:23,811 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 14 states have internal predecessors, (35), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 9 states have call predecessors, (19), 8 states have call successors, (19) Word has length 117 [2022-03-20 13:47:23,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:47:23,814 INFO L225 Difference]: With dead ends: 565 [2022-03-20 13:47:23,814 INFO L226 Difference]: Without dead ends: 563 [2022-03-20 13:47:23,814 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 210 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-03-20 13:47:23,815 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 25 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:47:23,815 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 562 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 721 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-03-20 13:47:23,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-03-20 13:47:24,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 549. [2022-03-20 13:47:24,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 338 states have (on average 1.1449704142011834) internal successors, (387), 345 states have internal predecessors, (387), 139 states have call successors, (139), 72 states have call predecessors, (139), 71 states have return successors, (137), 131 states have call predecessors, (137), 137 states have call successors, (137) [2022-03-20 13:47:24,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 663 transitions. [2022-03-20 13:47:24,009 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 663 transitions. Word has length 117 [2022-03-20 13:47:24,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:47:24,009 INFO L478 AbstractCegarLoop]: Abstraction has 549 states and 663 transitions. [2022-03-20 13:47:24,009 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 14 states have internal predecessors, (35), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 9 states have call predecessors, (19), 8 states have call successors, (19) [2022-03-20 13:47:24,009 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 663 transitions. [2022-03-20 13:47:24,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-03-20 13:47:24,011 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:47:24,011 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 6, 5, 5, 5, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:47:24,039 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-03-20 13:47:24,227 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-20 13:47:24,227 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:47:24,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:47:24,228 INFO L85 PathProgramCache]: Analyzing trace with hash 465524772, now seen corresponding path program 45 times [2022-03-20 13:47:24,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:47:24,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [311759509] [2022-03-20 13:47:24,228 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:47:24,228 INFO L85 PathProgramCache]: Analyzing trace with hash 465524772, now seen corresponding path program 46 times [2022-03-20 13:47:24,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:47:24,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247162642] [2022-03-20 13:47:24,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:47:24,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:47:24,234 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:47:24,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1045455270] [2022-03-20 13:47:24,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:47:24,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:47:24,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:47:24,238 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:47:24,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-20 13:47:24,313 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:47:24,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:47:24,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-20 13:47:24,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:47:28,092 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 118 proven. 136 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2022-03-20 13:47:28,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:47:28,610 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 135 proven. 8 refuted. 0 times theorem prover too weak. 448 trivial. 0 not checked. [2022-03-20 13:47:28,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:47:28,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247162642] [2022-03-20 13:47:28,610 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:47:28,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045455270] [2022-03-20 13:47:28,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045455270] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:47:28,610 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:47:28,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9] total 21 [2022-03-20 13:47:28,611 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:47:28,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [311759509] [2022-03-20 13:47:28,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [311759509] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:47:28,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:47:28,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 13:47:28,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661817911] [2022-03-20 13:47:28,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:47:28,611 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 13:47:28,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:47:28,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 13:47:28,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-03-20 13:47:28,612 INFO L87 Difference]: Start difference. First operand 549 states and 663 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) [2022-03-20 13:47:30,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:47:30,595 INFO L93 Difference]: Finished difference Result 593 states and 718 transitions. [2022-03-20 13:47:30,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 13:47:30,596 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) Word has length 117 [2022-03-20 13:47:30,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:47:30,598 INFO L225 Difference]: With dead ends: 593 [2022-03-20 13:47:30,598 INFO L226 Difference]: Without dead ends: 591 [2022-03-20 13:47:30,598 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 211 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2022-03-20 13:47:30,598 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 27 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-20 13:47:30,599 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 324 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-20 13:47:30,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2022-03-20 13:47:30,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 567. [2022-03-20 13:47:30,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 350 states have (on average 1.1428571428571428) internal successors, (400), 357 states have internal predecessors, (400), 142 states have call successors, (142), 75 states have call predecessors, (142), 74 states have return successors, (140), 134 states have call predecessors, (140), 140 states have call successors, (140) [2022-03-20 13:47:30,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 682 transitions. [2022-03-20 13:47:30,878 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 682 transitions. Word has length 117 [2022-03-20 13:47:30,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:47:30,878 INFO L478 AbstractCegarLoop]: Abstraction has 567 states and 682 transitions. [2022-03-20 13:47:30,878 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) [2022-03-20 13:47:30,878 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 682 transitions. [2022-03-20 13:47:30,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-03-20 13:47:30,880 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:47:30,880 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 6, 5, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:47:30,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-20 13:47:31,111 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:47:31,112 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:47:31,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:47:31,112 INFO L85 PathProgramCache]: Analyzing trace with hash 2041197218, now seen corresponding path program 47 times [2022-03-20 13:47:31,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:47:31,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [562103342] [2022-03-20 13:47:31,112 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:47:31,112 INFO L85 PathProgramCache]: Analyzing trace with hash 2041197218, now seen corresponding path program 48 times [2022-03-20 13:47:31,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:47:31,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821795409] [2022-03-20 13:47:31,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:47:31,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:47:31,117 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:47:31,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1370598884] [2022-03-20 13:47:31,118 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:47:31,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:47:31,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:47:31,119 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:47:31,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-20 13:47:31,178 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 13:47:31,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:47:31,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 13:47:31,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:47:31,395 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 135 proven. 8 refuted. 0 times theorem prover too weak. 448 trivial. 0 not checked. [2022-03-20 13:47:31,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:47:31,616 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 135 proven. 8 refuted. 0 times theorem prover too weak. 448 trivial. 0 not checked. [2022-03-20 13:47:31,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:47:31,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821795409] [2022-03-20 13:47:31,617 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:47:31,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370598884] [2022-03-20 13:47:31,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370598884] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:47:31,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:47:31,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-03-20 13:47:31,617 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:47:31,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [562103342] [2022-03-20 13:47:31,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [562103342] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:47:31,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:47:31,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 13:47:31,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309986394] [2022-03-20 13:47:31,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:47:31,618 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 13:47:31,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:47:31,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 13:47:31,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-20 13:47:31,619 INFO L87 Difference]: Start difference. First operand 567 states and 682 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 13:47:32,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:47:32,137 INFO L93 Difference]: Finished difference Result 571 states and 685 transitions. [2022-03-20 13:47:32,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 13:47:32,138 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 117 [2022-03-20 13:47:32,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:47:32,139 INFO L225 Difference]: With dead ends: 571 [2022-03-20 13:47:32,139 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 13:47:32,140 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 222 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-20 13:47:32,140 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 11 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:47:32,141 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 116 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 13:47:32,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 13:47:32,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 13:47:32,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-20 13:47:32,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 13:47:32,141 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 117 [2022-03-20 13:47:32,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:47:32,141 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 13:47:32,142 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 13:47:32,142 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 13:47:32,142 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 13:47:32,144 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 13:47:32,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-20 13:47:32,347 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-20 13:47:32,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.