/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 16:39:14,151 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 16:39:14,153 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 16:39:14,185 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 16:39:14,234 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 16:39:14,235 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 16:39:14,237 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 16:39:14,237 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-04-06 16:39:14,247 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 16:39:14,248 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 16:39:14,249 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 16:39:14,249 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 16:39:14,249 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 16:39:14,249 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 16:39:14,249 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 16:39:14,250 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 16:39:14,250 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 16:39:14,251 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 16:39:14,251 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 16:39:14,251 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 16:39:14,251 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 16:39:14,251 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 16:39:14,251 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 16:39:14,251 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 16:39:14,252 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 16:39:14,252 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 16:39:14,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 16:39:14,252 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 16:39:14,252 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 16:39:14,252 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 16:39:14,252 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 16:39:14,252 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 16:39:14,253 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-04-06 16:39:14,253 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 16:39:14,488 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 16:39:14,507 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 16:39:14,509 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 16:39:14,510 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 16:39:14,511 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 16:39:14,512 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound10.c [2022-04-06 16:39:14,570 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3832a65b5/b8fed324da39421782ea78e03e06b1cd/FLAGb766ad501 [2022-04-06 16:39:14,965 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 16:39:14,966 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound10.c [2022-04-06 16:39:14,973 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3832a65b5/b8fed324da39421782ea78e03e06b1cd/FLAGb766ad501 [2022-04-06 16:39:14,987 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3832a65b5/b8fed324da39421782ea78e03e06b1cd [2022-04-06 16:39:14,989 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 16:39:14,991 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 16:39:14,993 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 16:39:14,993 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 16:39:14,996 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 16:39:14,997 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 04:39:14" (1/1) ... [2022-04-06 16:39:14,998 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d97321b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:39:14, skipping insertion in model container [2022-04-06 16:39:14,998 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 04:39:14" (1/1) ... [2022-04-06 16:39:15,004 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 16:39:15,018 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 16:39:15,195 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound10.c[490,503] [2022-04-06 16:39:15,226 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 16:39:15,235 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 16:39:15,246 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound10.c[490,503] [2022-04-06 16:39:15,257 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 16:39:15,266 INFO L208 MainTranslator]: Completed translation [2022-04-06 16:39:15,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:39:15 WrapperNode [2022-04-06 16:39:15,267 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 16:39:15,268 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 16:39:15,268 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 16:39:15,268 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 16:39:15,277 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:39:15" (1/1) ... [2022-04-06 16:39:15,277 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:39:15" (1/1) ... [2022-04-06 16:39:15,285 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:39:15" (1/1) ... [2022-04-06 16:39:15,285 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:39:15" (1/1) ... [2022-04-06 16:39:15,296 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:39:15" (1/1) ... [2022-04-06 16:39:15,300 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:39:15" (1/1) ... [2022-04-06 16:39:15,301 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:39:15" (1/1) ... [2022-04-06 16:39:15,302 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 16:39:15,303 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 16:39:15,303 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 16:39:15,303 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 16:39:15,306 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:39:15" (1/1) ... [2022-04-06 16:39:15,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 16:39:15,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:39:15,330 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 16:39:15,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 16:39:15,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 16:39:15,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 16:39:15,357 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 16:39:15,357 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 16:39:15,357 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 16:39:15,357 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 16:39:15,357 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 16:39:15,357 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 16:39:15,357 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 16:39:15,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 16:39:15,357 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 16:39:15,358 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 16:39:15,358 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 16:39:15,358 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 16:39:15,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 16:39:15,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 16:39:15,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 16:39:15,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 16:39:15,358 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 16:39:15,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 16:39:15,412 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 16:39:15,413 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 16:39:15,596 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 16:39:15,601 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 16:39:15,601 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-04-06 16:39:15,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 04:39:15 BoogieIcfgContainer [2022-04-06 16:39:15,602 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 16:39:15,604 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 16:39:15,604 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 16:39:15,621 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 16:39:15,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 04:39:14" (1/3) ... [2022-04-06 16:39:15,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@750d9571 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 04:39:15, skipping insertion in model container [2022-04-06 16:39:15,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:39:15" (2/3) ... [2022-04-06 16:39:15,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@750d9571 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 04:39:15, skipping insertion in model container [2022-04-06 16:39:15,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 04:39:15" (3/3) ... [2022-04-06 16:39:15,624 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound10.c [2022-04-06 16:39:15,627 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 16:39:15,628 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 16:39:15,676 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 16:39:15,681 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 16:39:15,681 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 16:39:15,712 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 16:39:15,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 16:39:15,718 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:39:15,718 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:39:15,719 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:39:15,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:39:15,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1766263304, now seen corresponding path program 1 times [2022-04-06 16:39:15,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:15,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1390782813] [2022-04-06 16:39:15,755 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:39:15,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1766263304, now seen corresponding path program 2 times [2022-04-06 16:39:15,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:39:15,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548764787] [2022-04-06 16:39:15,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:39:15,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:39:15,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:39:15,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 16:39:15,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:39:15,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 16:39:15,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:39:15,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 16:39:15,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:39:15,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 16:39:15,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:39:15,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548764787] [2022-04-06 16:39:15,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548764787] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:39:15,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:39:15,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 16:39:15,977 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:39:15,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1390782813] [2022-04-06 16:39:15,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1390782813] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:39:15,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:39:15,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 16:39:15,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282816580] [2022-04-06 16:39:15,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:39:15,982 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 16:39:15,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:16,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 16:39:16,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 16:39:16,013 INFO L87 Difference]: Start difference. First operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 16:39:16,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:39:16,134 INFO L93 Difference]: Finished difference Result 74 states and 111 transitions. [2022-04-06 16:39:16,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 16:39:16,136 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-04-06 16:39:16,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:39:16,142 INFO L225 Difference]: With dead ends: 74 [2022-04-06 16:39:16,142 INFO L226 Difference]: Without dead ends: 36 [2022-04-06 16:39:16,145 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 16:39:16,150 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:39:16,151 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 51 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:39:16,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-04-06 16:39:16,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-04-06 16:39:16,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 16:39:16,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2022-04-06 16:39:16,196 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 22 [2022-04-06 16:39:16,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:39:16,196 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2022-04-06 16:39:16,197 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 16:39:16,197 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2022-04-06 16:39:16,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 16:39:16,199 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:39:16,199 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:39:16,200 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 16:39:16,200 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:39:16,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:39:16,201 INFO L85 PathProgramCache]: Analyzing trace with hash -81203399, now seen corresponding path program 1 times [2022-04-06 16:39:16,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:16,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [532917638] [2022-04-06 16:39:16,206 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:39:16,206 INFO L85 PathProgramCache]: Analyzing trace with hash -81203399, now seen corresponding path program 2 times [2022-04-06 16:39:16,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:39:16,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647135635] [2022-04-06 16:39:16,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:39:16,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:39:16,249 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:39:16,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1869320290] [2022-04-06 16:39:16,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:39:16,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:39:16,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:39:16,259 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:39:16,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 16:39:16,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 16:39:16,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:39:16,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 16:39:16,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:39:16,468 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 16:39:16,469 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 16:39:16,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:39:16,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647135635] [2022-04-06 16:39:16,469 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:39:16,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869320290] [2022-04-06 16:39:16,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869320290] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:39:16,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:39:16,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 16:39:16,472 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:39:16,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [532917638] [2022-04-06 16:39:16,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [532917638] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:39:16,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:39:16,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 16:39:16,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212254106] [2022-04-06 16:39:16,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:39:16,479 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 16:39:16,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:16,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 16:39:16,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 16:39:16,480 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 16:39:16,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:39:16,509 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2022-04-06 16:39:16,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 16:39:16,509 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-04-06 16:39:16,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:39:16,511 INFO L225 Difference]: With dead ends: 44 [2022-04-06 16:39:16,512 INFO L226 Difference]: Without dead ends: 37 [2022-04-06 16:39:16,512 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 16:39:16,513 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:39:16,517 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 113 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:39:16,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-04-06 16:39:16,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-04-06 16:39:16,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 16:39:16,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2022-04-06 16:39:16,535 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 23 [2022-04-06 16:39:16,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:39:16,536 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2022-04-06 16:39:16,536 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 16:39:16,537 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2022-04-06 16:39:16,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-06 16:39:16,537 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:39:16,538 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:39:16,559 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-06 16:39:16,751 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 [2022-04-06 16:39:16,751 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:39:16,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:39:16,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1762644405, now seen corresponding path program 1 times [2022-04-06 16:39:16,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:16,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1676321033] [2022-04-06 16:39:16,753 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:39:16,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1762644405, now seen corresponding path program 2 times [2022-04-06 16:39:16,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:39:16,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826460105] [2022-04-06 16:39:16,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:39:16,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:39:16,764 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:39:16,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1668808368] [2022-04-06 16:39:16,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:39:16,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:39:16,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:39:16,766 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:39:16,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 16:39:16,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 16:39:16,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:39:16,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 16:39:16,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:39:16,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 16:39:16,994 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 16:39:16,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:39:16,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826460105] [2022-04-06 16:39:16,994 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:39:16,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668808368] [2022-04-06 16:39:16,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668808368] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:39:16,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:39:16,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 16:39:16,995 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:39:16,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1676321033] [2022-04-06 16:39:16,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1676321033] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:39:16,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:39:16,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 16:39:16,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661975984] [2022-04-06 16:39:16,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:39:16,998 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 16:39:16,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:16,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 16:39:16,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 16:39:16,999 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 16:39:17,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:39:17,098 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2022-04-06 16:39:17,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 16:39:17,099 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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 24 [2022-04-06 16:39:17,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:39:17,100 INFO L225 Difference]: With dead ends: 57 [2022-04-06 16:39:17,100 INFO L226 Difference]: Without dead ends: 54 [2022-04-06 16:39:17,101 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-06 16:39:17,110 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 18 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:39:17,111 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 172 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:39:17,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-04-06 16:39:17,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2022-04-06 16:39:17,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 36 states have internal predecessors, (46), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 16:39:17,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 70 transitions. [2022-04-06 16:39:17,121 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 70 transitions. Word has length 24 [2022-04-06 16:39:17,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:39:17,121 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 70 transitions. [2022-04-06 16:39:17,121 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 16:39:17,122 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 70 transitions. [2022-04-06 16:39:17,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 16:39:17,122 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:39:17,122 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:39:17,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 16:39:17,323 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 [2022-04-06 16:39:17,323 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:39:17,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:39:17,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1090347867, now seen corresponding path program 1 times [2022-04-06 16:39:17,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:17,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [641115874] [2022-04-06 16:39:17,324 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:39:17,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1090347867, now seen corresponding path program 2 times [2022-04-06 16:39:17,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:39:17,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763976117] [2022-04-06 16:39:17,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:39:17,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:39:17,336 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:39:17,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [289239489] [2022-04-06 16:39:17,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:39:17,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:39:17,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:39:17,338 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:39:17,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 16:39:17,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:39:17,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:39:17,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 16:39:17,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:39:17,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 16:39:17,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 16:39:17,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:39:17,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763976117] [2022-04-06 16:39:17,469 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:39:17,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289239489] [2022-04-06 16:39:17,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289239489] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:39:17,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:39:17,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:39:17,474 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:39:17,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [641115874] [2022-04-06 16:39:17,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [641115874] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:39:17,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:39:17,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:39:17,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491318791] [2022-04-06 16:39:17,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:39:17,475 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:39:17,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:17,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:39:17,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 16:39:17,476 INFO L87 Difference]: Start difference. First operand 53 states and 70 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 16:39:17,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:39:17,504 INFO L93 Difference]: Finished difference Result 77 states and 104 transitions. [2022-04-06 16:39:17,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 16:39:17,504 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2022-04-06 16:39:17,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:39:17,506 INFO L225 Difference]: With dead ends: 77 [2022-04-06 16:39:17,506 INFO L226 Difference]: Without dead ends: 55 [2022-04-06 16:39:17,507 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 16:39:17,508 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:39:17,509 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 113 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:39:17,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-04-06 16:39:17,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-04-06 16:39:17,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 38 states have internal predecessors, (48), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 16:39:17,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 72 transitions. [2022-04-06 16:39:17,528 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 72 transitions. Word has length 29 [2022-04-06 16:39:17,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:39:17,529 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 72 transitions. [2022-04-06 16:39:17,529 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 16:39:17,529 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 72 transitions. [2022-04-06 16:39:17,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-06 16:39:17,530 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:39:17,530 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:39:17,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 16:39:17,753 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 [2022-04-06 16:39:17,753 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:39:17,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:39:17,754 INFO L85 PathProgramCache]: Analyzing trace with hash 979890972, now seen corresponding path program 1 times [2022-04-06 16:39:17,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:17,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1667732158] [2022-04-06 16:39:17,754 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:39:17,754 INFO L85 PathProgramCache]: Analyzing trace with hash 979890972, now seen corresponding path program 2 times [2022-04-06 16:39:17,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:39:17,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587256172] [2022-04-06 16:39:17,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:39:17,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:39:17,786 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:39:17,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [869129762] [2022-04-06 16:39:17,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:39:17,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:39:17,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:39:17,788 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:39:17,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 16:39:17,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:39:17,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:39:17,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 16:39:17,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:39:17,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 16:39:17,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:39:18,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 16:39:18,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:39:18,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587256172] [2022-04-06 16:39:18,027 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:39:18,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869129762] [2022-04-06 16:39:18,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869129762] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:39:18,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:39:18,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-04-06 16:39:18,028 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:39:18,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1667732158] [2022-04-06 16:39:18,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1667732158] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:39:18,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:39:18,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 16:39:18,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150250622] [2022-04-06 16:39:18,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:39:18,028 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 16:39:18,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:18,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 16:39:18,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-04-06 16:39:18,029 INFO L87 Difference]: Start difference. First operand 55 states and 72 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 16:39:18,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:39:18,074 INFO L93 Difference]: Finished difference Result 67 states and 85 transitions. [2022-04-06 16:39:18,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 16:39:18,074 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-04-06 16:39:18,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:39:18,077 INFO L225 Difference]: With dead ends: 67 [2022-04-06 16:39:18,077 INFO L226 Difference]: Without dead ends: 60 [2022-04-06 16:39:18,078 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-04-06 16:39:18,078 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 14 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:39:18,078 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 141 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:39:18,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-04-06 16:39:18,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-04-06 16:39:18,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 42 states have internal predecessors, (53), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 16:39:18,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 77 transitions. [2022-04-06 16:39:18,094 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 77 transitions. Word has length 30 [2022-04-06 16:39:18,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:39:18,094 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 77 transitions. [2022-04-06 16:39:18,094 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 16:39:18,094 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 77 transitions. [2022-04-06 16:39:18,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 16:39:18,096 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:39:18,096 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:39:18,121 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-04-06 16:39:18,313 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 [2022-04-06 16:39:18,313 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:39:18,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:39:18,313 INFO L85 PathProgramCache]: Analyzing trace with hash 296831538, now seen corresponding path program 1 times [2022-04-06 16:39:18,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:18,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1195870998] [2022-04-06 16:39:18,314 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:39:18,314 INFO L85 PathProgramCache]: Analyzing trace with hash 296831538, now seen corresponding path program 2 times [2022-04-06 16:39:18,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:39:18,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156604172] [2022-04-06 16:39:18,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:39:18,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:39:18,326 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:39:18,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1503418249] [2022-04-06 16:39:18,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:39:18,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:39:18,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:39:18,330 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:39:18,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 16:39:18,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:39:18,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:39:18,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 16:39:18,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:39:18,443 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 16:39:18,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:39:18,561 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 16:39:18,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:39:18,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156604172] [2022-04-06 16:39:18,562 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:39:18,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503418249] [2022-04-06 16:39:18,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503418249] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:39:18,562 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:39:18,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-04-06 16:39:18,562 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:39:18,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1195870998] [2022-04-06 16:39:18,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1195870998] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:39:18,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:39:18,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 16:39:18,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736302797] [2022-04-06 16:39:18,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:39:18,563 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 16:39:18,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:18,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 16:39:18,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-04-06 16:39:18,564 INFO L87 Difference]: Start difference. First operand 59 states and 77 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 16:39:18,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:39:18,764 INFO L93 Difference]: Finished difference Result 138 states and 201 transitions. [2022-04-06 16:39:18,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 16:39:18,764 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), 3 states have call successors, (5), 2 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 31 [2022-04-06 16:39:18,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:39:18,766 INFO L225 Difference]: With dead ends: 138 [2022-04-06 16:39:18,766 INFO L226 Difference]: Without dead ends: 131 [2022-04-06 16:39:18,766 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-04-06 16:39:18,768 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 115 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:39:18,768 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 298 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:39:18,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-04-06 16:39:18,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 88. [2022-04-06 16:39:18,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 66 states have (on average 1.3636363636363635) internal successors, (90), 67 states have internal predecessors, (90), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-06 16:39:18,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 122 transitions. [2022-04-06 16:39:18,800 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 122 transitions. Word has length 31 [2022-04-06 16:39:18,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:39:18,801 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 122 transitions. [2022-04-06 16:39:18,801 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), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 16:39:18,801 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 122 transitions. [2022-04-06 16:39:18,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 16:39:18,808 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:39:18,808 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:39:18,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 16:39:19,019 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 [2022-04-06 16:39:19,020 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:39:19,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:39:19,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1911367052, now seen corresponding path program 1 times [2022-04-06 16:39:19,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:19,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1679554464] [2022-04-06 16:39:19,021 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:39:19,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1911367052, now seen corresponding path program 2 times [2022-04-06 16:39:19,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:39:19,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187569639] [2022-04-06 16:39:19,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:39:19,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:39:19,040 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:39:19,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1646517079] [2022-04-06 16:39:19,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:39:19,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:39:19,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:39:19,045 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:39:19,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 16:39:19,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:39:19,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:39:19,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 16:39:19,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:39:19,184 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 16:39:19,184 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 16:39:19,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:39:19,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187569639] [2022-04-06 16:39:19,185 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:39:19,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646517079] [2022-04-06 16:39:19,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646517079] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:39:19,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:39:19,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 16:39:19,185 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:39:19,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1679554464] [2022-04-06 16:39:19,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1679554464] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:39:19,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:39:19,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 16:39:19,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357435202] [2022-04-06 16:39:19,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:39:19,186 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 16:39:19,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:19,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 16:39:19,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-06 16:39:19,187 INFO L87 Difference]: Start difference. First operand 88 states and 122 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 16:39:19,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:39:19,217 INFO L93 Difference]: Finished difference Result 127 states and 178 transitions. [2022-04-06 16:39:19,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 16:39:19,217 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2022-04-06 16:39:19,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:39:19,218 INFO L225 Difference]: With dead ends: 127 [2022-04-06 16:39:19,218 INFO L226 Difference]: Without dead ends: 90 [2022-04-06 16:39:19,219 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-06 16:39:19,219 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 10 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:39:19,220 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 165 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:39:19,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-04-06 16:39:19,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-04-06 16:39:19,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 68 states have (on average 1.3529411764705883) internal successors, (92), 69 states have internal predecessors, (92), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-06 16:39:19,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 124 transitions. [2022-04-06 16:39:19,232 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 124 transitions. Word has length 35 [2022-04-06 16:39:19,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:39:19,232 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 124 transitions. [2022-04-06 16:39:19,233 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 16:39:19,233 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 124 transitions. [2022-04-06 16:39:19,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 16:39:19,233 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:39:19,233 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:39:19,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 16:39:19,456 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 [2022-04-06 16:39:19,457 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:39:19,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:39:19,457 INFO L85 PathProgramCache]: Analyzing trace with hash -304485816, now seen corresponding path program 1 times [2022-04-06 16:39:19,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:19,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [451203560] [2022-04-06 16:39:19,458 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:39:19,458 INFO L85 PathProgramCache]: Analyzing trace with hash -304485816, now seen corresponding path program 2 times [2022-04-06 16:39:19,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:39:19,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858129197] [2022-04-06 16:39:19,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:39:19,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:39:19,469 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:39:19,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1150079588] [2022-04-06 16:39:19,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:39:19,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:39:19,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:39:19,478 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:39:19,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 16:39:19,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:39:19,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:39:19,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 16:39:19,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:39:19,621 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 16:39:19,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:39:19,718 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 16:39:19,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:39:19,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858129197] [2022-04-06 16:39:19,719 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:39:19,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150079588] [2022-04-06 16:39:19,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150079588] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:39:19,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:39:19,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-04-06 16:39:19,720 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:39:19,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [451203560] [2022-04-06 16:39:19,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [451203560] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:39:19,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:39:19,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 16:39:19,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995111027] [2022-04-06 16:39:19,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:39:19,721 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 16:39:19,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:19,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 16:39:19,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-04-06 16:39:19,721 INFO L87 Difference]: Start difference. First operand 90 states and 124 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 16:39:19,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:39:19,781 INFO L93 Difference]: Finished difference Result 163 states and 227 transitions. [2022-04-06 16:39:19,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 16:39:19,781 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2022-04-06 16:39:19,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:39:19,783 INFO L225 Difference]: With dead ends: 163 [2022-04-06 16:39:19,783 INFO L226 Difference]: Without dead ends: 112 [2022-04-06 16:39:19,786 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-04-06 16:39:19,786 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 29 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:39:19,786 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 163 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:39:19,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-04-06 16:39:19,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2022-04-06 16:39:19,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 81 states have (on average 1.3209876543209877) internal successors, (107), 82 states have internal predecessors, (107), 21 states have call successors, (21), 7 states have call predecessors, (21), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-06 16:39:19,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 147 transitions. [2022-04-06 16:39:19,803 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 147 transitions. Word has length 36 [2022-04-06 16:39:19,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:39:19,804 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 147 transitions. [2022-04-06 16:39:19,804 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 16:39:19,804 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 147 transitions. [2022-04-06 16:39:19,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 16:39:19,805 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:39:19,805 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:39:19,829 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-04-06 16:39:20,019 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 [2022-04-06 16:39:20,020 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:39:20,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:39:20,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1581560821, now seen corresponding path program 1 times [2022-04-06 16:39:20,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:20,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [950314578] [2022-04-06 16:39:20,021 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:39:20,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1581560821, now seen corresponding path program 2 times [2022-04-06 16:39:20,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:39:20,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575316416] [2022-04-06 16:39:20,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:39:20,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:39:20,031 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:39:20,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [578750354] [2022-04-06 16:39:20,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:39:20,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:39:20,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:39:20,032 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:39:20,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 16:39:20,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:39:20,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:39:20,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 16:39:20,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:39:20,313 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 16:39:20,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:39:20,428 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 16:39:20,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:39:20,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575316416] [2022-04-06 16:39:20,429 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:39:20,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578750354] [2022-04-06 16:39:20,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578750354] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:39:20,429 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:39:20,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 11 [2022-04-06 16:39:20,430 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:39:20,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [950314578] [2022-04-06 16:39:20,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [950314578] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:39:20,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:39:20,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 16:39:20,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088580586] [2022-04-06 16:39:20,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:39:20,431 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 16:39:20,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:20,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 16:39:20,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-04-06 16:39:20,431 INFO L87 Difference]: Start difference. First operand 109 states and 147 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 16:39:20,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:39:20,578 INFO L93 Difference]: Finished difference Result 154 states and 208 transitions. [2022-04-06 16:39:20,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 16:39:20,579 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 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 36 [2022-04-06 16:39:20,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:39:20,580 INFO L225 Difference]: With dead ends: 154 [2022-04-06 16:39:20,580 INFO L226 Difference]: Without dead ends: 152 [2022-04-06 16:39:20,580 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-04-06 16:39:20,581 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 61 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:39:20,581 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 326 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:39:20,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-04-06 16:39:20,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 148. [2022-04-06 16:39:20,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 109 states have (on average 1.3394495412844036) internal successors, (146), 110 states have internal predecessors, (146), 29 states have call successors, (29), 10 states have call predecessors, (29), 9 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-04-06 16:39:20,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 202 transitions. [2022-04-06 16:39:20,608 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 202 transitions. Word has length 36 [2022-04-06 16:39:20,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:39:20,608 INFO L478 AbstractCegarLoop]: Abstraction has 148 states and 202 transitions. [2022-04-06 16:39:20,609 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 16:39:20,609 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 202 transitions. [2022-04-06 16:39:20,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 16:39:20,609 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:39:20,609 INFO L499 BasicCegarLoop]: trace histogram [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, 1] [2022-04-06 16:39:20,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 16:39:20,823 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 [2022-04-06 16:39:20,824 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:39:20,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:39:20,824 INFO L85 PathProgramCache]: Analyzing trace with hash -428189223, now seen corresponding path program 3 times [2022-04-06 16:39:20,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:20,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1108878455] [2022-04-06 16:39:20,824 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:39:20,824 INFO L85 PathProgramCache]: Analyzing trace with hash -428189223, now seen corresponding path program 4 times [2022-04-06 16:39:20,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:39:20,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632711942] [2022-04-06 16:39:20,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:39:20,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:39:20,834 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:39:20,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [883921490] [2022-04-06 16:39:20,834 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:39:20,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:39:20,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:39:20,838 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:39:20,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 16:39:20,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:39:20,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:39:20,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 16:39:20,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:39:21,009 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 16:39:21,010 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 16:39:21,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:39:21,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632711942] [2022-04-06 16:39:21,010 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:39:21,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883921490] [2022-04-06 16:39:21,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883921490] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:39:21,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:39:21,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:39:21,011 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:39:21,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1108878455] [2022-04-06 16:39:21,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1108878455] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:39:21,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:39:21,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:39:21,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149732578] [2022-04-06 16:39:21,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:39:21,011 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:39:21,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:21,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:39:21,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 16:39:21,012 INFO L87 Difference]: Start difference. First operand 148 states and 202 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 16:39:21,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:39:21,127 INFO L93 Difference]: Finished difference Result 300 states and 442 transitions. [2022-04-06 16:39:21,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 16:39:21,127 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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 37 [2022-04-06 16:39:21,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:39:21,129 INFO L225 Difference]: With dead ends: 300 [2022-04-06 16:39:21,129 INFO L226 Difference]: Without dead ends: 249 [2022-04-06 16:39:21,130 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-04-06 16:39:21,130 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 29 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:39:21,130 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 176 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:39:21,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-04-06 16:39:21,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 175. [2022-04-06 16:39:21,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 136 states have (on average 1.3455882352941178) internal successors, (183), 137 states have internal predecessors, (183), 29 states have call successors, (29), 10 states have call predecessors, (29), 9 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-04-06 16:39:21,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 239 transitions. [2022-04-06 16:39:21,152 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 239 transitions. Word has length 37 [2022-04-06 16:39:21,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:39:21,153 INFO L478 AbstractCegarLoop]: Abstraction has 175 states and 239 transitions. [2022-04-06 16:39:21,153 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 16:39:21,153 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 239 transitions. [2022-04-06 16:39:21,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 16:39:21,153 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:39:21,154 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:39:21,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 16:39:21,367 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 [2022-04-06 16:39:21,367 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:39:21,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:39:21,368 INFO L85 PathProgramCache]: Analyzing trace with hash -957710478, now seen corresponding path program 1 times [2022-04-06 16:39:21,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:21,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1173696488] [2022-04-06 16:39:21,368 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:39:21,368 INFO L85 PathProgramCache]: Analyzing trace with hash -957710478, now seen corresponding path program 2 times [2022-04-06 16:39:21,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:39:21,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078614627] [2022-04-06 16:39:21,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:39:21,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:39:21,378 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:39:21,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [880638913] [2022-04-06 16:39:21,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:39:21,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:39:21,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:39:21,379 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:39:21,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 16:39:21,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:39:21,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:39:21,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 16:39:21,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:39:21,567 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-06 16:39:21,567 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 16:39:21,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:39:21,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078614627] [2022-04-06 16:39:21,568 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:39:21,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880638913] [2022-04-06 16:39:21,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880638913] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:39:21,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:39:21,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 16:39:21,568 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:39:21,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1173696488] [2022-04-06 16:39:21,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1173696488] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:39:21,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:39:21,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 16:39:21,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650408908] [2022-04-06 16:39:21,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:39:21,569 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 16:39:21,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:21,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 16:39:21,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-04-06 16:39:21,569 INFO L87 Difference]: Start difference. First operand 175 states and 239 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 16:39:21,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:39:21,706 INFO L93 Difference]: Finished difference Result 193 states and 262 transitions. [2022-04-06 16:39:21,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 16:39:21,707 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-04-06 16:39:21,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:39:21,708 INFO L225 Difference]: With dead ends: 193 [2022-04-06 16:39:21,708 INFO L226 Difference]: Without dead ends: 191 [2022-04-06 16:39:21,708 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-04-06 16:39:21,709 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 61 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:39:21,709 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 244 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:39:21,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-04-06 16:39:21,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 190. [2022-04-06 16:39:21,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 145 states have (on average 1.3379310344827586) internal successors, (194), 146 states have internal predecessors, (194), 33 states have call successors, (33), 12 states have call predecessors, (33), 11 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-04-06 16:39:21,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 258 transitions. [2022-04-06 16:39:21,729 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 258 transitions. Word has length 39 [2022-04-06 16:39:21,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:39:21,730 INFO L478 AbstractCegarLoop]: Abstraction has 190 states and 258 transitions. [2022-04-06 16:39:21,730 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 16:39:21,730 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 258 transitions. [2022-04-06 16:39:21,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 16:39:21,730 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:39:21,730 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:39:21,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 16:39:21,943 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 [2022-04-06 16:39:21,943 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:39:21,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:39:21,944 INFO L85 PathProgramCache]: Analyzing trace with hash 409018142, now seen corresponding path program 1 times [2022-04-06 16:39:21,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:21,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [381722563] [2022-04-06 16:39:21,944 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:39:21,944 INFO L85 PathProgramCache]: Analyzing trace with hash 409018142, now seen corresponding path program 2 times [2022-04-06 16:39:21,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:39:21,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882542992] [2022-04-06 16:39:21,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:39:21,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:39:21,953 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:39:21,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1940081317] [2022-04-06 16:39:21,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:39:21,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:39:21,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:39:21,955 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:39:21,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 16:39:21,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:39:21,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:39:21,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 16:39:22,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:39:22,332 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 16:39:22,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:39:22,496 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 16:39:22,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:39:22,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882542992] [2022-04-06 16:39:22,497 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:39:22,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940081317] [2022-04-06 16:39:22,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940081317] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:39:22,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:39:22,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 14 [2022-04-06 16:39:22,497 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:39:22,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [381722563] [2022-04-06 16:39:22,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [381722563] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:39:22,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:39:22,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 16:39:22,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689244692] [2022-04-06 16:39:22,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:39:22,498 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 16:39:22,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:22,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 16:39:22,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-04-06 16:39:22,498 INFO L87 Difference]: Start difference. First operand 190 states and 258 transitions. Second operand has 11 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-06 16:39:22,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:39:22,730 INFO L93 Difference]: Finished difference Result 199 states and 266 transitions. [2022-04-06 16:39:22,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 16:39:22,730 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 41 [2022-04-06 16:39:22,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:39:22,733 INFO L225 Difference]: With dead ends: 199 [2022-04-06 16:39:22,733 INFO L226 Difference]: Without dead ends: 197 [2022-04-06 16:39:22,734 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-04-06 16:39:22,734 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 72 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 16:39:22,735 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 321 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 16:39:22,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-04-06 16:39:22,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 194. [2022-04-06 16:39:22,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 148 states have (on average 1.3310810810810811) internal successors, (197), 149 states have internal predecessors, (197), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-04-06 16:39:22,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 261 transitions. [2022-04-06 16:39:22,756 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 261 transitions. Word has length 41 [2022-04-06 16:39:22,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:39:22,757 INFO L478 AbstractCegarLoop]: Abstraction has 194 states and 261 transitions. [2022-04-06 16:39:22,757 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-06 16:39:22,757 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 261 transitions. [2022-04-06 16:39:22,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 16:39:22,758 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:39:22,758 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:39:22,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 16:39:22,985 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 [2022-04-06 16:39:22,986 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:39:22,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:39:22,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1943393983, now seen corresponding path program 1 times [2022-04-06 16:39:22,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:22,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [813708894] [2022-04-06 16:39:22,986 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:39:22,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1943393983, now seen corresponding path program 2 times [2022-04-06 16:39:22,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:39:22,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582943289] [2022-04-06 16:39:22,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:39:22,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:39:22,996 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:39:22,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1517919204] [2022-04-06 16:39:22,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:39:22,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:39:22,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:39:22,997 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:39:23,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 16:39:23,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:39:23,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:39:23,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 16:39:23,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:39:23,146 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 16:39:23,146 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 16:39:23,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:39:23,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582943289] [2022-04-06 16:39:23,147 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:39:23,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517919204] [2022-04-06 16:39:23,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517919204] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:39:23,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:39:23,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:39:23,147 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:39:23,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [813708894] [2022-04-06 16:39:23,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [813708894] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:39:23,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:39:23,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:39:23,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916259830] [2022-04-06 16:39:23,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:39:23,148 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:39:23,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:23,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:39:23,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 16:39:23,149 INFO L87 Difference]: Start difference. First operand 194 states and 261 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 16:39:23,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:39:23,206 INFO L93 Difference]: Finished difference Result 261 states and 367 transitions. [2022-04-06 16:39:23,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 16:39:23,207 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 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 44 [2022-04-06 16:39:23,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:39:23,208 INFO L225 Difference]: With dead ends: 261 [2022-04-06 16:39:23,208 INFO L226 Difference]: Without dead ends: 259 [2022-04-06 16:39:23,209 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 16:39:23,209 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 12 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:39:23,209 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 163 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:39:23,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-04-06 16:39:23,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 228. [2022-04-06 16:39:23,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 161 states have (on average 1.329192546583851) internal successors, (214), 167 states have internal predecessors, (214), 53 states have call successors, (53), 14 states have call predecessors, (53), 13 states have return successors, (51), 46 states have call predecessors, (51), 51 states have call successors, (51) [2022-04-06 16:39:23,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 318 transitions. [2022-04-06 16:39:23,234 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 318 transitions. Word has length 44 [2022-04-06 16:39:23,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:39:23,234 INFO L478 AbstractCegarLoop]: Abstraction has 228 states and 318 transitions. [2022-04-06 16:39:23,234 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 16:39:23,234 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 318 transitions. [2022-04-06 16:39:23,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 16:39:23,235 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:39:23,235 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:39:23,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 16:39:23,451 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 [2022-04-06 16:39:23,451 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:39:23,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:39:23,452 INFO L85 PathProgramCache]: Analyzing trace with hash -772903697, now seen corresponding path program 1 times [2022-04-06 16:39:23,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:23,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [850146015] [2022-04-06 16:39:23,452 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:39:23,452 INFO L85 PathProgramCache]: Analyzing trace with hash -772903697, now seen corresponding path program 2 times [2022-04-06 16:39:23,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:39:23,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785186875] [2022-04-06 16:39:23,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:39:23,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:39:23,461 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:39:23,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2021234853] [2022-04-06 16:39:23,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:39:23,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:39:23,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:39:23,462 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:39:23,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 16:39:23,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:39:23,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:39:23,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 16:39:23,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:39:23,613 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 16:39:23,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:39:23,741 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 16:39:23,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:39:23,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785186875] [2022-04-06 16:39:23,741 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:39:23,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021234853] [2022-04-06 16:39:23,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021234853] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:39:23,741 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:39:23,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-04-06 16:39:23,742 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:39:23,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [850146015] [2022-04-06 16:39:23,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [850146015] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:39:23,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:39:23,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 16:39:23,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241176765] [2022-04-06 16:39:23,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:39:23,742 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 16:39:23,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:23,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 16:39:23,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-04-06 16:39:23,743 INFO L87 Difference]: Start difference. First operand 228 states and 318 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 16:39:23,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:39:23,836 INFO L93 Difference]: Finished difference Result 429 states and 607 transitions. [2022-04-06 16:39:23,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 16:39:23,837 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2022-04-06 16:39:23,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:39:23,840 INFO L225 Difference]: With dead ends: 429 [2022-04-06 16:39:23,840 INFO L226 Difference]: Without dead ends: 264 [2022-04-06 16:39:23,841 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-04-06 16:39:23,841 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 59 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:39:23,841 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 203 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:39:23,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-04-06 16:39:23,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 258. [2022-04-06 16:39:23,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 183 states have (on average 1.3060109289617485) internal successors, (239), 189 states have internal predecessors, (239), 57 states have call successors, (57), 18 states have call predecessors, (57), 17 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2022-04-06 16:39:23,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 351 transitions. [2022-04-06 16:39:23,894 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 351 transitions. Word has length 42 [2022-04-06 16:39:23,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:39:23,894 INFO L478 AbstractCegarLoop]: Abstraction has 258 states and 351 transitions. [2022-04-06 16:39:23,894 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 16:39:23,894 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 351 transitions. [2022-04-06 16:39:23,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 16:39:23,894 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:39:23,895 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:39:23,912 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-04-06 16:39:24,099 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 [2022-04-06 16:39:24,100 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:39:24,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:39:24,100 INFO L85 PathProgramCache]: Analyzing trace with hash 744709461, now seen corresponding path program 1 times [2022-04-06 16:39:24,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:24,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1929012682] [2022-04-06 16:39:24,101 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:39:24,101 INFO L85 PathProgramCache]: Analyzing trace with hash 744709461, now seen corresponding path program 2 times [2022-04-06 16:39:24,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:39:24,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408296768] [2022-04-06 16:39:24,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:39:24,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:39:24,110 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:39:24,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1406340451] [2022-04-06 16:39:24,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:39:24,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:39:24,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:39:24,111 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:39:24,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 16:39:24,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:39:24,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:39:24,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 16:39:24,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:39:24,257 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-04-06 16:39:24,257 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 16:39:24,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:39:24,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408296768] [2022-04-06 16:39:24,257 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:39:24,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406340451] [2022-04-06 16:39:24,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406340451] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:39:24,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:39:24,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:39:24,258 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:39:24,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1929012682] [2022-04-06 16:39:24,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1929012682] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:39:24,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:39:24,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:39:24,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66890342] [2022-04-06 16:39:24,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:39:24,258 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:39:24,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:24,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:39:24,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 16:39:24,259 INFO L87 Difference]: Start difference. First operand 258 states and 351 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 16:39:24,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:39:24,326 INFO L93 Difference]: Finished difference Result 332 states and 473 transitions. [2022-04-06 16:39:24,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 16:39:24,327 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 46 [2022-04-06 16:39:24,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:39:24,330 INFO L225 Difference]: With dead ends: 332 [2022-04-06 16:39:24,330 INFO L226 Difference]: Without dead ends: 330 [2022-04-06 16:39:24,332 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 16:39:24,333 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 10 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:39:24,334 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 153 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:39:24,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-04-06 16:39:24,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 321. [2022-04-06 16:39:24,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 213 states have (on average 1.3427230046948357) internal successors, (286), 223 states have internal predecessors, (286), 89 states have call successors, (89), 19 states have call predecessors, (89), 18 states have return successors, (87), 78 states have call predecessors, (87), 87 states have call successors, (87) [2022-04-06 16:39:24,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 462 transitions. [2022-04-06 16:39:24,380 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 462 transitions. Word has length 46 [2022-04-06 16:39:24,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:39:24,380 INFO L478 AbstractCegarLoop]: Abstraction has 321 states and 462 transitions. [2022-04-06 16:39:24,381 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 16:39:24,381 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 462 transitions. [2022-04-06 16:39:24,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 16:39:24,381 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:39:24,381 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:39:24,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 16:39:24,603 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 [2022-04-06 16:39:24,603 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:39:24,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:39:24,604 INFO L85 PathProgramCache]: Analyzing trace with hash -522797827, now seen corresponding path program 1 times [2022-04-06 16:39:24,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:24,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1843912212] [2022-04-06 16:39:24,604 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:39:24,604 INFO L85 PathProgramCache]: Analyzing trace with hash -522797827, now seen corresponding path program 2 times [2022-04-06 16:39:24,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:39:24,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930975848] [2022-04-06 16:39:24,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:39:24,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:39:24,616 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:39:24,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [709563417] [2022-04-06 16:39:24,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:39:24,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:39:24,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:39:24,617 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:39:24,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 16:39:24,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:39:24,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:39:24,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 16:39:24,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:39:24,791 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 16:39:24,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:39:24,948 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 16:39:24,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:39:24,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930975848] [2022-04-06 16:39:24,949 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:39:24,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709563417] [2022-04-06 16:39:24,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709563417] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:39:24,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:39:24,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-04-06 16:39:24,949 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:39:24,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1843912212] [2022-04-06 16:39:24,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1843912212] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:39:24,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:39:24,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 16:39:24,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829407777] [2022-04-06 16:39:24,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:39:24,950 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 16:39:24,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:24,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 16:39:24,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-04-06 16:39:24,951 INFO L87 Difference]: Start difference. First operand 321 states and 462 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-06 16:39:25,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:39:25,052 INFO L93 Difference]: Finished difference Result 335 states and 475 transitions. [2022-04-06 16:39:25,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 16:39:25,052 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 57 [2022-04-06 16:39:25,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:39:25,054 INFO L225 Difference]: With dead ends: 335 [2022-04-06 16:39:25,054 INFO L226 Difference]: Without dead ends: 328 [2022-04-06 16:39:25,055 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-04-06 16:39:25,055 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 53 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:39:25,055 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 186 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:39:25,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-04-06 16:39:25,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 324. [2022-04-06 16:39:25,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 216 states have (on average 1.337962962962963) internal successors, (289), 226 states have internal predecessors, (289), 89 states have call successors, (89), 19 states have call predecessors, (89), 18 states have return successors, (87), 78 states have call predecessors, (87), 87 states have call successors, (87) [2022-04-06 16:39:25,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 465 transitions. [2022-04-06 16:39:25,113 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 465 transitions. Word has length 57 [2022-04-06 16:39:25,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:39:25,114 INFO L478 AbstractCegarLoop]: Abstraction has 324 states and 465 transitions. [2022-04-06 16:39:25,114 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-06 16:39:25,114 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 465 transitions. [2022-04-06 16:39:25,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 16:39:25,115 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:39:25,115 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:39:25,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 16:39:25,335 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 [2022-04-06 16:39:25,335 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:39:25,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:39:25,336 INFO L85 PathProgramCache]: Analyzing trace with hash 958119025, now seen corresponding path program 1 times [2022-04-06 16:39:25,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:25,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1673737575] [2022-04-06 16:39:25,336 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:39:25,336 INFO L85 PathProgramCache]: Analyzing trace with hash 958119025, now seen corresponding path program 2 times [2022-04-06 16:39:25,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:39:25,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926899185] [2022-04-06 16:39:25,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:39:25,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:39:25,349 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:39:25,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1513780116] [2022-04-06 16:39:25,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:39:25,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:39:25,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:39:25,352 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:39:25,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 16:39:25,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:39:25,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:39:25,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 52 conjunts are in the unsatisfiable core [2022-04-06 16:39:25,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:39:25,989 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-04-06 16:39:25,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:39:27,169 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-04-06 16:39:27,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:39:27,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926899185] [2022-04-06 16:39:27,170 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:39:27,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513780116] [2022-04-06 16:39:27,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513780116] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:39:27,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:39:27,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2022-04-06 16:39:27,171 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:39:27,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1673737575] [2022-04-06 16:39:27,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1673737575] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:39:27,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:39:27,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 16:39:27,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300727973] [2022-04-06 16:39:27,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:39:27,171 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 16:39:27,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:27,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 16:39:27,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-04-06 16:39:27,172 INFO L87 Difference]: Start difference. First operand 324 states and 465 transitions. Second operand has 13 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-06 16:39:27,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:39:27,632 INFO L93 Difference]: Finished difference Result 384 states and 559 transitions. [2022-04-06 16:39:27,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 16:39:27,634 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 58 [2022-04-06 16:39:27,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:39:27,636 INFO L225 Difference]: With dead ends: 384 [2022-04-06 16:39:27,636 INFO L226 Difference]: Without dead ends: 381 [2022-04-06 16:39:27,637 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-04-06 16:39:27,637 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 74 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 16:39:27,637 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 386 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 16:39:27,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-04-06 16:39:27,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 377. [2022-04-06 16:39:27,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 243 states have (on average 1.345679012345679) internal successors, (327), 256 states have internal predecessors, (327), 113 states have call successors, (113), 21 states have call predecessors, (113), 20 states have return successors, (111), 99 states have call predecessors, (111), 111 states have call successors, (111) [2022-04-06 16:39:27,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 551 transitions. [2022-04-06 16:39:27,676 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 551 transitions. Word has length 58 [2022-04-06 16:39:27,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:39:27,676 INFO L478 AbstractCegarLoop]: Abstraction has 377 states and 551 transitions. [2022-04-06 16:39:27,676 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-06 16:39:27,676 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 551 transitions. [2022-04-06 16:39:27,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 16:39:27,677 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:39:27,677 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:39:27,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-06 16:39:27,891 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 [2022-04-06 16:39:27,891 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:39:27,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:39:27,892 INFO L85 PathProgramCache]: Analyzing trace with hash 27973409, now seen corresponding path program 1 times [2022-04-06 16:39:27,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:27,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1730647994] [2022-04-06 16:39:27,892 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:39:27,893 INFO L85 PathProgramCache]: Analyzing trace with hash 27973409, now seen corresponding path program 2 times [2022-04-06 16:39:27,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:39:27,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154761524] [2022-04-06 16:39:27,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:39:27,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:39:27,900 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:39:27,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [248989985] [2022-04-06 16:39:27,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:39:27,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:39:27,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:39:27,902 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:39:27,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 16:39:27,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:39:27,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:39:27,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 16:39:27,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:39:28,074 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 16:39:28,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:39:28,208 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 16:39:28,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:39:28,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154761524] [2022-04-06 16:39:28,208 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:39:28,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248989985] [2022-04-06 16:39:28,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248989985] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:39:28,208 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:39:28,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-04-06 16:39:28,208 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:39:28,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1730647994] [2022-04-06 16:39:28,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1730647994] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:39:28,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:39:28,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 16:39:28,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274446686] [2022-04-06 16:39:28,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:39:28,209 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 16:39:28,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:28,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 16:39:28,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-04-06 16:39:28,210 INFO L87 Difference]: Start difference. First operand 377 states and 551 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-06 16:39:28,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:39:28,358 INFO L93 Difference]: Finished difference Result 604 states and 873 transitions. [2022-04-06 16:39:28,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 16:39:28,358 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 63 [2022-04-06 16:39:28,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:39:28,361 INFO L225 Difference]: With dead ends: 604 [2022-04-06 16:39:28,361 INFO L226 Difference]: Without dead ends: 440 [2022-04-06 16:39:28,362 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2022-04-06 16:39:28,363 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 69 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:39:28,363 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 216 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:39:28,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-04-06 16:39:28,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 426. [2022-04-06 16:39:28,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 279 states have (on average 1.3118279569892473) internal successors, (366), 290 states have internal predecessors, (366), 117 states have call successors, (117), 30 states have call predecessors, (117), 29 states have return successors, (115), 105 states have call predecessors, (115), 115 states have call successors, (115) [2022-04-06 16:39:28,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 598 transitions. [2022-04-06 16:39:28,418 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 598 transitions. Word has length 63 [2022-04-06 16:39:28,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:39:28,418 INFO L478 AbstractCegarLoop]: Abstraction has 426 states and 598 transitions. [2022-04-06 16:39:28,418 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-06 16:39:28,418 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 598 transitions. [2022-04-06 16:39:28,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-06 16:39:28,419 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:39:28,419 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:39:28,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 16:39:28,640 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 [2022-04-06 16:39:28,641 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:39:28,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:39:28,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1288112160, now seen corresponding path program 3 times [2022-04-06 16:39:28,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:28,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1424750858] [2022-04-06 16:39:28,642 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:39:28,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1288112160, now seen corresponding path program 4 times [2022-04-06 16:39:28,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:39:28,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962043957] [2022-04-06 16:39:28,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:39:28,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:39:28,649 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:39:28,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1190953935] [2022-04-06 16:39:28,649 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:39:28,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:39:28,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:39:28,650 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:39:28,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-06 16:39:28,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:39:28,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:39:28,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 16:39:28,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:39:28,832 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 16:39:28,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:39:28,967 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 16:39:28,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:39:28,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962043957] [2022-04-06 16:39:28,968 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:39:28,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190953935] [2022-04-06 16:39:28,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190953935] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:39:28,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:39:28,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2022-04-06 16:39:28,968 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:39:28,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1424750858] [2022-04-06 16:39:28,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1424750858] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:39:28,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:39:28,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 16:39:28,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97287702] [2022-04-06 16:39:28,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:39:28,969 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 16:39:28,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:28,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 16:39:28,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-04-06 16:39:28,969 INFO L87 Difference]: Start difference. First operand 426 states and 598 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-06 16:39:29,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:39:29,139 INFO L93 Difference]: Finished difference Result 531 states and 722 transitions. [2022-04-06 16:39:29,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 16:39:29,139 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 64 [2022-04-06 16:39:29,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:39:29,142 INFO L225 Difference]: With dead ends: 531 [2022-04-06 16:39:29,142 INFO L226 Difference]: Without dead ends: 524 [2022-04-06 16:39:29,143 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=188, Unknown=0, NotChecked=0, Total=306 [2022-04-06 16:39:29,144 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 102 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:39:29,144 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 242 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:39:29,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2022-04-06 16:39:29,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 503. [2022-04-06 16:39:29,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 330 states have (on average 1.290909090909091) internal successors, (426), 346 states have internal predecessors, (426), 134 states have call successors, (134), 39 states have call predecessors, (134), 38 states have return successors, (131), 117 states have call predecessors, (131), 131 states have call successors, (131) [2022-04-06 16:39:29,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 691 transitions. [2022-04-06 16:39:29,212 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 691 transitions. Word has length 64 [2022-04-06 16:39:29,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:39:29,212 INFO L478 AbstractCegarLoop]: Abstraction has 503 states and 691 transitions. [2022-04-06 16:39:29,212 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-06 16:39:29,213 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 691 transitions. [2022-04-06 16:39:29,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-06 16:39:29,216 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:39:29,216 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:39:29,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-06 16:39:29,435 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 [2022-04-06 16:39:29,435 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:39:29,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:39:29,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1156119236, now seen corresponding path program 1 times [2022-04-06 16:39:29,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:29,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1287361273] [2022-04-06 16:39:29,436 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:39:29,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1156119236, now seen corresponding path program 2 times [2022-04-06 16:39:29,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:39:29,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653189188] [2022-04-06 16:39:29,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:39:29,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:39:29,444 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:39:29,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1486743875] [2022-04-06 16:39:29,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:39:29,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:39:29,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:39:29,450 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:39:29,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-06 16:39:29,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:39:29,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:39:29,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 16:39:29,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:39:29,714 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-04-06 16:39:29,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:39:29,840 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-04-06 16:39:29,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:39:29,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653189188] [2022-04-06 16:39:29,840 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:39:29,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486743875] [2022-04-06 16:39:29,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486743875] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 16:39:29,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:39:29,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11 [2022-04-06 16:39:29,841 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:39:29,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1287361273] [2022-04-06 16:39:29,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1287361273] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:39:29,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:39:29,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:39:29,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174936056] [2022-04-06 16:39:29,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:39:29,841 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:39:29,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:29,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:39:29,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-04-06 16:39:29,842 INFO L87 Difference]: Start difference. First operand 503 states and 691 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 16:39:29,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:39:29,934 INFO L93 Difference]: Finished difference Result 517 states and 704 transitions. [2022-04-06 16:39:29,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 16:39:29,934 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 67 [2022-04-06 16:39:29,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:39:29,937 INFO L225 Difference]: With dead ends: 517 [2022-04-06 16:39:29,937 INFO L226 Difference]: Without dead ends: 515 [2022-04-06 16:39:29,938 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-04-06 16:39:29,938 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 12 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:39:29,938 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 144 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:39:29,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-04-06 16:39:29,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 511. [2022-04-06 16:39:29,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 336 states have (on average 1.2797619047619047) internal successors, (430), 352 states have internal predecessors, (430), 134 states have call successors, (134), 41 states have call predecessors, (134), 40 states have return successors, (131), 117 states have call predecessors, (131), 131 states have call successors, (131) [2022-04-06 16:39:29,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 695 transitions. [2022-04-06 16:39:29,999 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 695 transitions. Word has length 67 [2022-04-06 16:39:29,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:39:29,999 INFO L478 AbstractCegarLoop]: Abstraction has 511 states and 695 transitions. [2022-04-06 16:39:29,999 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 16:39:29,999 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 695 transitions. [2022-04-06 16:39:30,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 16:39:30,000 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:39:30,000 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:39:30,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-06 16:39:30,223 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 [2022-04-06 16:39:30,223 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:39:30,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:39:30,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1261753774, now seen corresponding path program 3 times [2022-04-06 16:39:30,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:30,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1109330793] [2022-04-06 16:39:30,224 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:39:30,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1261753774, now seen corresponding path program 4 times [2022-04-06 16:39:30,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:39:30,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045505198] [2022-04-06 16:39:30,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:39:30,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:39:30,232 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:39:30,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [806551895] [2022-04-06 16:39:30,233 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:39:30,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:39:30,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:39:30,234 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:39:30,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-06 16:39:30,299 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:39:30,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:39:30,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 16:39:30,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:39:30,410 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 16:39:30,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:39:30,519 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 16:39:30,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:39:30,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045505198] [2022-04-06 16:39:30,520 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:39:30,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806551895] [2022-04-06 16:39:30,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806551895] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:39:30,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:39:30,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-04-06 16:39:30,521 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:39:30,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1109330793] [2022-04-06 16:39:30,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1109330793] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:39:30,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:39:30,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 16:39:30,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348790308] [2022-04-06 16:39:30,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:39:30,521 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 16:39:30,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:30,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 16:39:30,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-04-06 16:39:30,522 INFO L87 Difference]: Start difference. First operand 511 states and 695 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 16:39:30,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:39:30,973 INFO L93 Difference]: Finished difference Result 857 states and 1271 transitions. [2022-04-06 16:39:30,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 16:39:30,974 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2022-04-06 16:39:30,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:39:30,979 INFO L225 Difference]: With dead ends: 857 [2022-04-06 16:39:30,979 INFO L226 Difference]: Without dead ends: 850 [2022-04-06 16:39:30,980 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2022-04-06 16:39:30,981 INFO L913 BasicCegarLoop]: 117 mSDtfsCounter, 82 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 16:39:30,981 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 451 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 16:39:30,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2022-04-06 16:39:31,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 567. [2022-04-06 16:39:31,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 380 states have (on average 1.3) internal successors, (494), 395 states have internal predecessors, (494), 146 states have call successors, (146), 41 states have call predecessors, (146), 40 states have return successors, (143), 130 states have call predecessors, (143), 143 states have call successors, (143) [2022-04-06 16:39:31,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 783 transitions. [2022-04-06 16:39:31,063 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 783 transitions. Word has length 65 [2022-04-06 16:39:31,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:39:31,064 INFO L478 AbstractCegarLoop]: Abstraction has 567 states and 783 transitions. [2022-04-06 16:39:31,064 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 16:39:31,064 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 783 transitions. [2022-04-06 16:39:31,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 16:39:31,065 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:39:31,065 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:39:31,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-04-06 16:39:31,283 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 [2022-04-06 16:39:31,283 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:39:31,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:39:31,284 INFO L85 PathProgramCache]: Analyzing trace with hash 365174246, now seen corresponding path program 1 times [2022-04-06 16:39:31,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:31,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [663074352] [2022-04-06 16:39:31,284 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:39:31,284 INFO L85 PathProgramCache]: Analyzing trace with hash 365174246, now seen corresponding path program 2 times [2022-04-06 16:39:31,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:39:31,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995292000] [2022-04-06 16:39:31,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:39:31,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:39:31,291 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:39:31,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1529220304] [2022-04-06 16:39:31,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:39:31,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:39:31,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:39:31,296 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:39:31,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-06 16:39:31,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:39:31,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:39:31,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 16:39:31,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:39:31,453 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 16:39:31,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:39:31,578 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 16:39:31,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:39:31,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995292000] [2022-04-06 16:39:31,578 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:39:31,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529220304] [2022-04-06 16:39:31,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529220304] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:39:31,578 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:39:31,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-04-06 16:39:31,579 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:39:31,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [663074352] [2022-04-06 16:39:31,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [663074352] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:39:31,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:39:31,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 16:39:31,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194552756] [2022-04-06 16:39:31,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:39:31,579 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 16:39:31,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:31,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 16:39:31,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-04-06 16:39:31,591 INFO L87 Difference]: Start difference. First operand 567 states and 783 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-06 16:39:31,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:39:31,748 INFO L93 Difference]: Finished difference Result 839 states and 1203 transitions. [2022-04-06 16:39:31,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 16:39:31,748 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2022-04-06 16:39:31,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:39:31,751 INFO L225 Difference]: With dead ends: 839 [2022-04-06 16:39:31,751 INFO L226 Difference]: Without dead ends: 567 [2022-04-06 16:39:31,753 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=168, Unknown=0, NotChecked=0, Total=272 [2022-04-06 16:39:31,753 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 85 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:39:31,753 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 199 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:39:31,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-04-06 16:39:31,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 567. [2022-04-06 16:39:31,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 380 states have (on average 1.2894736842105263) internal successors, (490), 395 states have internal predecessors, (490), 146 states have call successors, (146), 41 states have call predecessors, (146), 40 states have return successors, (143), 130 states have call predecessors, (143), 143 states have call successors, (143) [2022-04-06 16:39:31,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 779 transitions. [2022-04-06 16:39:31,823 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 779 transitions. Word has length 65 [2022-04-06 16:39:31,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:39:31,824 INFO L478 AbstractCegarLoop]: Abstraction has 567 states and 779 transitions. [2022-04-06 16:39:31,824 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-06 16:39:31,824 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 779 transitions. [2022-04-06 16:39:31,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 16:39:31,826 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:39:31,826 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:39:31,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-04-06 16:39:32,049 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 [2022-04-06 16:39:32,050 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:39:32,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:39:32,050 INFO L85 PathProgramCache]: Analyzing trace with hash -544828664, now seen corresponding path program 1 times [2022-04-06 16:39:32,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:32,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1892151873] [2022-04-06 16:39:32,050 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:39:32,051 INFO L85 PathProgramCache]: Analyzing trace with hash -544828664, now seen corresponding path program 2 times [2022-04-06 16:39:32,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:39:32,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822142265] [2022-04-06 16:39:32,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:39:32,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:39:32,062 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:39:32,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1956870977] [2022-04-06 16:39:32,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:39:32,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:39:32,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:39:32,063 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:39:32,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-06 16:39:32,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:39:32,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:39:32,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 16:39:32,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:39:32,198 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-04-06 16:39:32,198 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 16:39:32,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:39:32,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822142265] [2022-04-06 16:39:32,199 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:39:32,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956870977] [2022-04-06 16:39:32,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956870977] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:39:32,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:39:32,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:39:32,199 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:39:32,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1892151873] [2022-04-06 16:39:32,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1892151873] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:39:32,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:39:32,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:39:32,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177159370] [2022-04-06 16:39:32,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:39:32,200 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:39:32,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:32,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:39:32,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 16:39:32,200 INFO L87 Difference]: Start difference. First operand 567 states and 779 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 16:39:32,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:39:32,377 INFO L93 Difference]: Finished difference Result 980 states and 1387 transitions. [2022-04-06 16:39:32,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 16:39:32,378 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 69 [2022-04-06 16:39:32,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:39:32,381 INFO L225 Difference]: With dead ends: 980 [2022-04-06 16:39:32,381 INFO L226 Difference]: Without dead ends: 624 [2022-04-06 16:39:32,382 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-06 16:39:32,383 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 11 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:39:32,383 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 149 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:39:32,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2022-04-06 16:39:32,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 568. [2022-04-06 16:39:32,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 395 states have (on average 1.3012658227848102) internal successors, (514), 400 states have internal predecessors, (514), 134 states have call successors, (134), 39 states have call predecessors, (134), 38 states have return successors, (131), 128 states have call predecessors, (131), 131 states have call successors, (131) [2022-04-06 16:39:32,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 779 transitions. [2022-04-06 16:39:32,456 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 779 transitions. Word has length 69 [2022-04-06 16:39:32,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:39:32,457 INFO L478 AbstractCegarLoop]: Abstraction has 568 states and 779 transitions. [2022-04-06 16:39:32,457 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 16:39:32,457 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 779 transitions. [2022-04-06 16:39:32,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 16:39:32,458 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:39:32,458 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:39:32,480 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-04-06 16:39:32,671 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 [2022-04-06 16:39:32,671 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:39:32,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:39:32,672 INFO L85 PathProgramCache]: Analyzing trace with hash -996119216, now seen corresponding path program 3 times [2022-04-06 16:39:32,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:32,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1062634549] [2022-04-06 16:39:32,672 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:39:32,672 INFO L85 PathProgramCache]: Analyzing trace with hash -996119216, now seen corresponding path program 4 times [2022-04-06 16:39:32,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:39:32,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285911365] [2022-04-06 16:39:32,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:39:32,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:39:32,678 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:39:32,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1886016255] [2022-04-06 16:39:32,679 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:39:32,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:39:32,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:39:32,680 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:39:32,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-04-06 16:39:32,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:39:32,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:39:32,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 16:39:32,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:39:32,870 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 16:39:32,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:39:33,022 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 16:39:33,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:39:33,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285911365] [2022-04-06 16:39:33,022 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:39:33,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886016255] [2022-04-06 16:39:33,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886016255] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:39:33,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:39:33,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2022-04-06 16:39:33,023 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:39:33,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1062634549] [2022-04-06 16:39:33,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1062634549] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:39:33,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:39:33,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 16:39:33,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392545354] [2022-04-06 16:39:33,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:39:33,023 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 16:39:33,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:33,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 16:39:33,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-04-06 16:39:33,024 INFO L87 Difference]: Start difference. First operand 568 states and 779 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-06 16:39:33,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:39:33,219 INFO L93 Difference]: Finished difference Result 914 states and 1304 transitions. [2022-04-06 16:39:33,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 16:39:33,220 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 69 [2022-04-06 16:39:33,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:39:33,223 INFO L225 Difference]: With dead ends: 914 [2022-04-06 16:39:33,223 INFO L226 Difference]: Without dead ends: 584 [2022-04-06 16:39:33,225 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2022-04-06 16:39:33,225 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 116 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:39:33,226 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 243 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:39:33,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2022-04-06 16:39:33,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 575. [2022-04-06 16:39:33,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 402 states have (on average 1.2960199004975124) internal successors, (521), 404 states have internal predecessors, (521), 134 states have call successors, (134), 39 states have call predecessors, (134), 38 states have return successors, (131), 131 states have call predecessors, (131), 131 states have call successors, (131) [2022-04-06 16:39:33,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 786 transitions. [2022-04-06 16:39:33,322 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 786 transitions. Word has length 69 [2022-04-06 16:39:33,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:39:33,322 INFO L478 AbstractCegarLoop]: Abstraction has 575 states and 786 transitions. [2022-04-06 16:39:33,322 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-06 16:39:33,322 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 786 transitions. [2022-04-06 16:39:33,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-04-06 16:39:33,323 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:39:33,323 INFO L499 BasicCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:39:33,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-04-06 16:39:33,545 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 [2022-04-06 16:39:33,545 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:39:33,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:39:33,545 INFO L85 PathProgramCache]: Analyzing trace with hash 862858316, now seen corresponding path program 3 times [2022-04-06 16:39:33,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:33,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1250183936] [2022-04-06 16:39:33,546 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:39:33,546 INFO L85 PathProgramCache]: Analyzing trace with hash 862858316, now seen corresponding path program 4 times [2022-04-06 16:39:33,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:39:33,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936213437] [2022-04-06 16:39:33,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:39:33,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:39:33,553 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:39:33,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [12156554] [2022-04-06 16:39:33,553 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:39:33,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:39:33,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:39:33,554 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:39:33,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-04-06 16:39:33,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:39:33,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:39:33,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 16:39:33,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:39:33,769 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 16:39:33,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:39:33,907 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 16:39:33,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:39:33,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936213437] [2022-04-06 16:39:33,908 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:39:33,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12156554] [2022-04-06 16:39:33,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12156554] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:39:33,908 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:39:33,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2022-04-06 16:39:33,908 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:39:33,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1250183936] [2022-04-06 16:39:33,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1250183936] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:39:33,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:39:33,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 16:39:33,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714912945] [2022-04-06 16:39:33,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:39:33,909 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 16:39:33,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:33,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 16:39:33,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-04-06 16:39:33,910 INFO L87 Difference]: Start difference. First operand 575 states and 786 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-06 16:39:34,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:39:34,137 INFO L93 Difference]: Finished difference Result 918 states and 1274 transitions. [2022-04-06 16:39:34,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 16:39:34,138 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 70 [2022-04-06 16:39:34,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:39:34,143 INFO L225 Difference]: With dead ends: 918 [2022-04-06 16:39:34,143 INFO L226 Difference]: Without dead ends: 688 [2022-04-06 16:39:34,144 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2022-04-06 16:39:34,145 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 132 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:39:34,145 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 263 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:39:34,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2022-04-06 16:39:34,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 658. [2022-04-06 16:39:34,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 457 states have (on average 1.2735229759299782) internal successors, (582), 460 states have internal predecessors, (582), 151 states have call successors, (151), 50 states have call predecessors, (151), 49 states have return successors, (147), 147 states have call predecessors, (147), 147 states have call successors, (147) [2022-04-06 16:39:34,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 880 transitions. [2022-04-06 16:39:34,247 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 880 transitions. Word has length 70 [2022-04-06 16:39:34,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:39:34,247 INFO L478 AbstractCegarLoop]: Abstraction has 658 states and 880 transitions. [2022-04-06 16:39:34,248 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-06 16:39:34,248 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 880 transitions. [2022-04-06 16:39:34,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-04-06 16:39:34,249 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:39:34,250 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:39:34,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-04-06 16:39:34,473 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 [2022-04-06 16:39:34,473 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:39:34,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:39:34,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1546062343, now seen corresponding path program 1 times [2022-04-06 16:39:34,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:34,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1604890173] [2022-04-06 16:39:34,474 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:39:34,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1546062343, now seen corresponding path program 2 times [2022-04-06 16:39:34,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:39:34,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971920177] [2022-04-06 16:39:34,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:39:34,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:39:34,480 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:39:34,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1359816551] [2022-04-06 16:39:34,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:39:34,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:39:34,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:39:34,481 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:39:34,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-04-06 16:39:34,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:39:34,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:39:34,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 16:39:34,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:39:34,648 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-04-06 16:39:34,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:39:34,788 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-04-06 16:39:34,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:39:34,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971920177] [2022-04-06 16:39:34,789 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:39:34,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359816551] [2022-04-06 16:39:34,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359816551] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:39:34,789 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:39:34,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-04-06 16:39:34,789 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:39:34,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1604890173] [2022-04-06 16:39:34,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1604890173] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:39:34,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:39:34,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 16:39:34,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731330688] [2022-04-06 16:39:34,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:39:34,790 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 16:39:34,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:34,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 16:39:34,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-04-06 16:39:34,790 INFO L87 Difference]: Start difference. First operand 658 states and 880 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 16:39:35,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:39:35,035 INFO L93 Difference]: Finished difference Result 757 states and 1022 transitions. [2022-04-06 16:39:35,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 16:39:35,035 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 70 [2022-04-06 16:39:35,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:39:35,038 INFO L225 Difference]: With dead ends: 757 [2022-04-06 16:39:35,039 INFO L226 Difference]: Without dead ends: 755 [2022-04-06 16:39:35,039 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-04-06 16:39:35,039 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 30 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:39:35,040 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 212 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:39:35,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2022-04-06 16:39:35,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 748. [2022-04-06 16:39:35,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 537 states have (on average 1.297951582867784) internal successors, (697), 546 states have internal predecessors, (697), 160 states have call successors, (160), 51 states have call predecessors, (160), 50 states have return successors, (156), 150 states have call predecessors, (156), 156 states have call successors, (156) [2022-04-06 16:39:35,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 1013 transitions. [2022-04-06 16:39:35,149 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 1013 transitions. Word has length 70 [2022-04-06 16:39:35,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:39:35,150 INFO L478 AbstractCegarLoop]: Abstraction has 748 states and 1013 transitions. [2022-04-06 16:39:35,150 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 16:39:35,150 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 1013 transitions. [2022-04-06 16:39:35,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-04-06 16:39:35,151 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:39:35,151 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:39:35,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-04-06 16:39:35,373 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 [2022-04-06 16:39:35,373 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:39:35,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:39:35,374 INFO L85 PathProgramCache]: Analyzing trace with hash -705069158, now seen corresponding path program 3 times [2022-04-06 16:39:35,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:35,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1894347037] [2022-04-06 16:39:35,374 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:39:35,374 INFO L85 PathProgramCache]: Analyzing trace with hash -705069158, now seen corresponding path program 4 times [2022-04-06 16:39:35,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:39:35,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665114831] [2022-04-06 16:39:35,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:39:35,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:39:35,380 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:39:35,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1453640246] [2022-04-06 16:39:35,380 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:39:35,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:39:35,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:39:35,381 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:39:35,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-04-06 16:39:35,427 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:39:35,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:39:35,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 65 conjunts are in the unsatisfiable core [2022-04-06 16:39:35,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:39:36,124 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 8 proven. 52 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-04-06 16:39:36,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:39:36,647 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 27 proven. 30 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-04-06 16:39:36,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:39:36,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665114831] [2022-04-06 16:39:36,648 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:39:36,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453640246] [2022-04-06 16:39:36,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453640246] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:39:36,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:39:36,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 22 [2022-04-06 16:39:36,648 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:39:36,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1894347037] [2022-04-06 16:39:36,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1894347037] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:39:36,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:39:36,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 16:39:36,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069550166] [2022-04-06 16:39:36,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:39:36,649 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 16:39:36,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:36,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 16:39:36,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-04-06 16:39:36,650 INFO L87 Difference]: Start difference. First operand 748 states and 1013 transitions. Second operand has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2022-04-06 16:39:37,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:39:37,240 INFO L93 Difference]: Finished difference Result 840 states and 1136 transitions. [2022-04-06 16:39:37,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 16:39:37,241 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) Word has length 75 [2022-04-06 16:39:37,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:39:37,244 INFO L225 Difference]: With dead ends: 840 [2022-04-06 16:39:37,244 INFO L226 Difference]: Without dead ends: 838 [2022-04-06 16:39:37,244 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2022-04-06 16:39:37,245 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 81 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 16:39:37,245 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 530 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 16:39:37,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2022-04-06 16:39:37,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 813. [2022-04-06 16:39:37,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 579 states have (on average 1.302245250431779) internal successors, (754), 589 states have internal predecessors, (754), 178 states have call successors, (178), 56 states have call predecessors, (178), 55 states have return successors, (174), 167 states have call predecessors, (174), 174 states have call successors, (174) [2022-04-06 16:39:37,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 1106 transitions. [2022-04-06 16:39:37,369 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 1106 transitions. Word has length 75 [2022-04-06 16:39:37,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:39:37,369 INFO L478 AbstractCegarLoop]: Abstraction has 813 states and 1106 transitions. [2022-04-06 16:39:37,370 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2022-04-06 16:39:37,370 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 1106 transitions. [2022-04-06 16:39:37,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-04-06 16:39:37,370 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:39:37,371 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:39:37,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-04-06 16:39:37,598 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 [2022-04-06 16:39:37,598 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:39:37,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:39:37,599 INFO L85 PathProgramCache]: Analyzing trace with hash -949871629, now seen corresponding path program 5 times [2022-04-06 16:39:37,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:37,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1994205243] [2022-04-06 16:39:37,599 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:39:37,599 INFO L85 PathProgramCache]: Analyzing trace with hash -949871629, now seen corresponding path program 6 times [2022-04-06 16:39:37,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:39:37,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663602275] [2022-04-06 16:39:37,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:39:37,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:39:37,605 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:39:37,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [513170960] [2022-04-06 16:39:37,606 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:39:37,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:39:37,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:39:37,607 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:39:37,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-04-06 16:39:37,667 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 16:39:37,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:39:37,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 16:39:37,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:39:37,814 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 16:39:37,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:39:37,944 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 16:39:37,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:39:37,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663602275] [2022-04-06 16:39:37,944 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:39:37,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513170960] [2022-04-06 16:39:37,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513170960] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:39:37,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:39:37,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2022-04-06 16:39:37,944 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:39:37,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1994205243] [2022-04-06 16:39:37,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1994205243] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:39:37,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:39:37,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 16:39:37,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092164375] [2022-04-06 16:39:37,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:39:37,945 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 16:39:37,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:37,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 16:39:37,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-04-06 16:39:37,946 INFO L87 Difference]: Start difference. First operand 813 states and 1106 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-06 16:39:38,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:39:38,202 INFO L93 Difference]: Finished difference Result 1433 states and 1997 transitions. [2022-04-06 16:39:38,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 16:39:38,203 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 76 [2022-04-06 16:39:38,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:39:38,208 INFO L225 Difference]: With dead ends: 1433 [2022-04-06 16:39:38,208 INFO L226 Difference]: Without dead ends: 975 [2022-04-06 16:39:38,210 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2022-04-06 16:39:38,211 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 156 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:39:38,211 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 307 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:39:38,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2022-04-06 16:39:38,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 947. [2022-04-06 16:39:38,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 673 states have (on average 1.274888558692422) internal successors, (858), 683 states have internal predecessors, (858), 205 states have call successors, (205), 69 states have call predecessors, (205), 68 states have return successors, (200), 194 states have call predecessors, (200), 200 states have call successors, (200) [2022-04-06 16:39:38,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 1263 transitions. [2022-04-06 16:39:38,352 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 1263 transitions. Word has length 76 [2022-04-06 16:39:38,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:39:38,352 INFO L478 AbstractCegarLoop]: Abstraction has 947 states and 1263 transitions. [2022-04-06 16:39:38,352 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-06 16:39:38,352 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 1263 transitions. [2022-04-06 16:39:38,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-04-06 16:39:38,353 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:39:38,353 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:39:38,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-04-06 16:39:38,576 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 [2022-04-06 16:39:38,576 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:39:38,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:39:38,576 INFO L85 PathProgramCache]: Analyzing trace with hash -362795852, now seen corresponding path program 1 times [2022-04-06 16:39:38,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:38,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1594532428] [2022-04-06 16:39:38,577 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:39:38,577 INFO L85 PathProgramCache]: Analyzing trace with hash -362795852, now seen corresponding path program 2 times [2022-04-06 16:39:38,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:39:38,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494810934] [2022-04-06 16:39:38,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:39:38,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:39:38,590 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:39:38,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [561461928] [2022-04-06 16:39:38,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:39:38,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:39:38,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:39:38,624 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:39:38,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-04-06 16:39:38,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:39:38,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:39:38,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 56 conjunts are in the unsatisfiable core [2022-04-06 16:39:38,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:39:39,331 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-04-06 16:39:39,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:39:42,112 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-04-06 16:39:42,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:39:42,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494810934] [2022-04-06 16:39:42,113 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:39:42,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561461928] [2022-04-06 16:39:42,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561461928] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:39:42,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:39:42,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2022-04-06 16:39:42,113 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:39:42,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1594532428] [2022-04-06 16:39:42,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1594532428] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:39:42,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:39:42,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 16:39:42,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209784313] [2022-04-06 16:39:42,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:39:42,114 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 16:39:42,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:42,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 16:39:42,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-04-06 16:39:42,115 INFO L87 Difference]: Start difference. First operand 947 states and 1263 transitions. Second operand has 13 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-04-06 16:39:43,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:39:43,203 INFO L93 Difference]: Finished difference Result 1025 states and 1371 transitions. [2022-04-06 16:39:43,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 16:39:43,204 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 81 [2022-04-06 16:39:43,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:39:43,208 INFO L225 Difference]: With dead ends: 1025 [2022-04-06 16:39:43,208 INFO L226 Difference]: Without dead ends: 1022 [2022-04-06 16:39:43,209 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2022-04-06 16:39:43,209 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 76 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 16:39:43,210 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 422 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 16:39:43,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1022 states. [2022-04-06 16:39:43,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1022 to 957. [2022-04-06 16:39:43,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 679 states have (on average 1.2695139911634756) internal successors, (862), 689 states have internal predecessors, (862), 207 states have call successors, (207), 71 states have call predecessors, (207), 70 states have return successors, (203), 196 states have call predecessors, (203), 203 states have call successors, (203) [2022-04-06 16:39:43,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 1272 transitions. [2022-04-06 16:39:43,344 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 1272 transitions. Word has length 81 [2022-04-06 16:39:43,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:39:43,345 INFO L478 AbstractCegarLoop]: Abstraction has 957 states and 1272 transitions. [2022-04-06 16:39:43,345 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-04-06 16:39:43,345 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 1272 transitions. [2022-04-06 16:39:43,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-04-06 16:39:43,346 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:39:43,346 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:39:43,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-04-06 16:39:43,571 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 [2022-04-06 16:39:43,571 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:39:43,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:39:43,572 INFO L85 PathProgramCache]: Analyzing trace with hash -2112645673, now seen corresponding path program 1 times [2022-04-06 16:39:43,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:43,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2129250028] [2022-04-06 16:39:43,572 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:39:43,572 INFO L85 PathProgramCache]: Analyzing trace with hash -2112645673, now seen corresponding path program 2 times [2022-04-06 16:39:43,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:39:43,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818169416] [2022-04-06 16:39:43,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:39:43,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:39:43,578 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:39:43,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1986176891] [2022-04-06 16:39:43,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:39:43,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:39:43,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:39:43,579 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:39:43,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-04-06 16:39:43,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:39:43,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:39:43,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 16:39:43,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:39:43,803 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 16 proven. 88 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-04-06 16:39:43,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:39:43,956 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 16 proven. 24 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-04-06 16:39:43,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:39:43,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818169416] [2022-04-06 16:39:43,956 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:39:43,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986176891] [2022-04-06 16:39:43,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986176891] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:39:43,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:39:43,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2022-04-06 16:39:43,957 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:39:43,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2129250028] [2022-04-06 16:39:43,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2129250028] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:39:43,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:39:43,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 16:39:43,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079974976] [2022-04-06 16:39:43,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:39:43,957 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 16:39:43,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:43,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 16:39:43,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-04-06 16:39:43,958 INFO L87 Difference]: Start difference. First operand 957 states and 1272 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-04-06 16:39:44,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:39:44,219 INFO L93 Difference]: Finished difference Result 966 states and 1279 transitions. [2022-04-06 16:39:44,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 16:39:44,219 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 87 [2022-04-06 16:39:44,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:39:44,224 INFO L225 Difference]: With dead ends: 966 [2022-04-06 16:39:44,224 INFO L226 Difference]: Without dead ends: 959 [2022-04-06 16:39:44,224 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2022-04-06 16:39:44,225 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 132 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:39:44,225 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 250 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:39:44,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2022-04-06 16:39:44,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 957. [2022-04-06 16:39:44,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 679 states have (on average 1.2665684830633284) internal successors, (860), 689 states have internal predecessors, (860), 207 states have call successors, (207), 71 states have call predecessors, (207), 70 states have return successors, (203), 196 states have call predecessors, (203), 203 states have call successors, (203) [2022-04-06 16:39:44,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 1270 transitions. [2022-04-06 16:39:44,411 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 1270 transitions. Word has length 87 [2022-04-06 16:39:44,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:39:44,412 INFO L478 AbstractCegarLoop]: Abstraction has 957 states and 1270 transitions. [2022-04-06 16:39:44,412 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-04-06 16:39:44,412 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 1270 transitions. [2022-04-06 16:39:44,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-04-06 16:39:44,413 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:39:44,413 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:39:44,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-04-06 16:39:44,627 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 [2022-04-06 16:39:44,627 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:39:44,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:39:44,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1082523945, now seen corresponding path program 3 times [2022-04-06 16:39:44,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:44,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [890733263] [2022-04-06 16:39:44,628 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:39:44,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1082523945, now seen corresponding path program 4 times [2022-04-06 16:39:44,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:39:44,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708536512] [2022-04-06 16:39:44,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:39:44,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:39:44,636 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:39:44,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1487237316] [2022-04-06 16:39:44,637 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:39:44,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:39:44,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:39:44,639 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:39:44,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-04-06 16:39:44,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:39:44,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:39:44,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 78 conjunts are in the unsatisfiable core [2022-04-06 16:39:44,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:39:45,507 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:39:45,514 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:39:45,890 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 40 proven. 47 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-04-06 16:39:45,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:39:46,690 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:39:48,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:39:48,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708536512] [2022-04-06 16:39:48,232 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:39:48,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487237316] [2022-04-06 16:39:48,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487237316] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:39:48,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:39:48,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-04-06 16:39:48,233 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:39:48,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [890733263] [2022-04-06 16:39:48,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [890733263] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:39:48,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:39:48,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 16:39:48,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204135593] [2022-04-06 16:39:48,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:39:48,234 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 16:39:48,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:48,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 16:39:48,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-04-06 16:39:48,234 INFO L87 Difference]: Start difference. First operand 957 states and 1270 transitions. Second operand has 17 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-04-06 16:39:50,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:39:50,400 INFO L93 Difference]: Finished difference Result 1069 states and 1430 transitions. [2022-04-06 16:39:50,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 16:39:50,401 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 88 [2022-04-06 16:39:50,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:39:50,405 INFO L225 Difference]: With dead ends: 1069 [2022-04-06 16:39:50,405 INFO L226 Difference]: Without dead ends: 1066 [2022-04-06 16:39:50,406 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2022-04-06 16:39:50,406 INFO L913 BasicCegarLoop]: 75 mSDtfsCounter, 92 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 1142 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 1197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 16:39:50,407 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 676 Invalid, 1197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1142 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 16:39:50,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2022-04-06 16:39:50,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 1023. [2022-04-06 16:39:50,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 720 states have (on average 1.275) internal successors, (918), 731 states have internal predecessors, (918), 229 states have call successors, (229), 74 states have call predecessors, (229), 73 states have return successors, (225), 217 states have call predecessors, (225), 225 states have call successors, (225) [2022-04-06 16:39:50,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1372 transitions. [2022-04-06 16:39:50,596 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1372 transitions. Word has length 88 [2022-04-06 16:39:50,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:39:50,597 INFO L478 AbstractCegarLoop]: Abstraction has 1023 states and 1372 transitions. [2022-04-06 16:39:50,597 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-04-06 16:39:50,597 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1372 transitions. [2022-04-06 16:39:50,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-04-06 16:39:50,598 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:39:50,598 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:39:50,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-04-06 16:39:50,820 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 [2022-04-06 16:39:50,820 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:39:50,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:39:50,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1791236545, now seen corresponding path program 5 times [2022-04-06 16:39:50,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:50,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2031871051] [2022-04-06 16:39:50,821 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:39:50,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1791236545, now seen corresponding path program 6 times [2022-04-06 16:39:50,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:39:50,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488708222] [2022-04-06 16:39:50,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:39:50,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:39:50,829 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:39:50,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [24933894] [2022-04-06 16:39:50,829 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:39:50,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:39:50,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:39:50,831 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:39:50,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-04-06 16:39:50,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 16:39:50,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:39:50,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 16:39:50,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:39:51,112 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 16 proven. 98 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-04-06 16:39:51,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:39:51,265 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-04-06 16:39:51,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:39:51,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488708222] [2022-04-06 16:39:51,266 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:39:51,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24933894] [2022-04-06 16:39:51,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24933894] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:39:51,266 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:39:51,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2022-04-06 16:39:51,266 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:39:51,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2031871051] [2022-04-06 16:39:51,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2031871051] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:39:51,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:39:51,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 16:39:51,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341282873] [2022-04-06 16:39:51,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:39:51,267 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 16:39:51,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:51,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 16:39:51,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-04-06 16:39:51,267 INFO L87 Difference]: Start difference. First operand 1023 states and 1372 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-04-06 16:39:51,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:39:51,528 INFO L93 Difference]: Finished difference Result 1058 states and 1407 transitions. [2022-04-06 16:39:51,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 16:39:51,528 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 91 [2022-04-06 16:39:51,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:39:51,532 INFO L225 Difference]: With dead ends: 1058 [2022-04-06 16:39:51,532 INFO L226 Difference]: Without dead ends: 1051 [2022-04-06 16:39:51,533 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=140, Invalid=240, Unknown=0, NotChecked=0, Total=380 [2022-04-06 16:39:51,533 INFO L913 BasicCegarLoop]: 69 mSDtfsCounter, 150 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:39:51,533 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 298 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:39:51,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2022-04-06 16:39:51,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 1034. [2022-04-06 16:39:51,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 731 states have (on average 1.2708618331053352) internal successors, (929), 742 states have internal predecessors, (929), 229 states have call successors, (229), 74 states have call predecessors, (229), 73 states have return successors, (225), 217 states have call predecessors, (225), 225 states have call successors, (225) [2022-04-06 16:39:51,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 1383 transitions. [2022-04-06 16:39:51,707 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 1383 transitions. Word has length 91 [2022-04-06 16:39:51,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:39:51,707 INFO L478 AbstractCegarLoop]: Abstraction has 1034 states and 1383 transitions. [2022-04-06 16:39:51,707 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-04-06 16:39:51,707 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 1383 transitions. [2022-04-06 16:39:51,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-04-06 16:39:51,709 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:39:51,709 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:39:51,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-04-06 16:39:51,924 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 [2022-04-06 16:39:51,925 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:39:51,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:39:51,925 INFO L85 PathProgramCache]: Analyzing trace with hash -554609469, now seen corresponding path program 1 times [2022-04-06 16:39:51,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:51,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [270707488] [2022-04-06 16:39:51,926 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:39:51,926 INFO L85 PathProgramCache]: Analyzing trace with hash -554609469, now seen corresponding path program 2 times [2022-04-06 16:39:51,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:39:51,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350259391] [2022-04-06 16:39:51,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:39:51,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:39:51,932 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:39:51,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [814684330] [2022-04-06 16:39:51,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:39:51,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:39:51,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:39:51,935 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:39:51,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-04-06 16:39:51,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:39:51,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:39:51,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 16:39:51,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:39:52,180 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 24 proven. 96 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-04-06 16:39:52,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:39:52,322 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 24 proven. 32 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-04-06 16:39:52,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:39:52,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350259391] [2022-04-06 16:39:52,322 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:39:52,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814684330] [2022-04-06 16:39:52,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814684330] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:39:52,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:39:52,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2022-04-06 16:39:52,322 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:39:52,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [270707488] [2022-04-06 16:39:52,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [270707488] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:39:52,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:39:52,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 16:39:52,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518066506] [2022-04-06 16:39:52,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:39:52,323 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 16:39:52,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:52,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 16:39:52,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-04-06 16:39:52,323 INFO L87 Difference]: Start difference. First operand 1034 states and 1383 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-04-06 16:39:52,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:39:52,615 INFO L93 Difference]: Finished difference Result 1378 states and 1899 transitions. [2022-04-06 16:39:52,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 16:39:52,615 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 93 [2022-04-06 16:39:52,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:39:52,619 INFO L225 Difference]: With dead ends: 1378 [2022-04-06 16:39:52,619 INFO L226 Difference]: Without dead ends: 1058 [2022-04-06 16:39:52,620 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 172 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2022-04-06 16:39:52,621 INFO L913 BasicCegarLoop]: 69 mSDtfsCounter, 162 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:39:52,621 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 290 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:39:52,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2022-04-06 16:39:52,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 1054. [2022-04-06 16:39:52,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1054 states, 751 states have (on average 1.2623169107856191) internal successors, (948), 762 states have internal predecessors, (948), 229 states have call successors, (229), 74 states have call predecessors, (229), 73 states have return successors, (225), 217 states have call predecessors, (225), 225 states have call successors, (225) [2022-04-06 16:39:52,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1054 states to 1054 states and 1402 transitions. [2022-04-06 16:39:52,814 INFO L78 Accepts]: Start accepts. Automaton has 1054 states and 1402 transitions. Word has length 93 [2022-04-06 16:39:52,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:39:52,815 INFO L478 AbstractCegarLoop]: Abstraction has 1054 states and 1402 transitions. [2022-04-06 16:39:52,815 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-04-06 16:39:52,815 INFO L276 IsEmpty]: Start isEmpty. Operand 1054 states and 1402 transitions. [2022-04-06 16:39:52,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-04-06 16:39:52,817 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:39:52,817 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:39:52,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-04-06 16:39:53,039 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 [2022-04-06 16:39:53,039 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:39:53,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:39:53,039 INFO L85 PathProgramCache]: Analyzing trace with hash -2034142563, now seen corresponding path program 5 times [2022-04-06 16:39:53,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:53,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1856673532] [2022-04-06 16:39:53,040 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:39:53,040 INFO L85 PathProgramCache]: Analyzing trace with hash -2034142563, now seen corresponding path program 6 times [2022-04-06 16:39:53,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:39:53,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022866318] [2022-04-06 16:39:53,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:39:53,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:39:53,047 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:39:53,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [952199371] [2022-04-06 16:39:53,047 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:39:53,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:39:53,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:39:53,049 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:39:53,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-04-06 16:39:53,184 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 16:39:53,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:39:53,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 16:39:53,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:39:53,369 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 24 proven. 108 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-04-06 16:39:53,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:39:53,508 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 24 proven. 44 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-04-06 16:39:53,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:39:53,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022866318] [2022-04-06 16:39:53,508 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:39:53,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952199371] [2022-04-06 16:39:53,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952199371] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:39:53,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:39:53,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2022-04-06 16:39:53,509 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:39:53,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1856673532] [2022-04-06 16:39:53,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1856673532] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:39:53,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:39:53,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 16:39:53,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180494560] [2022-04-06 16:39:53,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:39:53,509 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 16:39:53,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:53,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 16:39:53,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-04-06 16:39:53,510 INFO L87 Difference]: Start difference. First operand 1054 states and 1402 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-04-06 16:39:53,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:39:53,824 INFO L93 Difference]: Finished difference Result 1535 states and 2087 transitions. [2022-04-06 16:39:53,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 16:39:53,825 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 97 [2022-04-06 16:39:53,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:39:53,829 INFO L225 Difference]: With dead ends: 1535 [2022-04-06 16:39:53,829 INFO L226 Difference]: Without dead ends: 1215 [2022-04-06 16:39:53,830 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2022-04-06 16:39:53,831 INFO L913 BasicCegarLoop]: 73 mSDtfsCounter, 181 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:39:53,831 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 314 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:39:53,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1215 states. [2022-04-06 16:39:54,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1215 to 1160. [2022-04-06 16:39:54,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1160 states, 809 states have (on average 1.2571075401730532) internal successors, (1017), 821 states have internal predecessors, (1017), 262 states have call successors, (262), 89 states have call predecessors, (262), 88 states have return successors, (257), 249 states have call predecessors, (257), 257 states have call successors, (257) [2022-04-06 16:39:54,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1536 transitions. [2022-04-06 16:39:54,038 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1536 transitions. Word has length 97 [2022-04-06 16:39:54,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:39:54,038 INFO L478 AbstractCegarLoop]: Abstraction has 1160 states and 1536 transitions. [2022-04-06 16:39:54,038 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-04-06 16:39:54,039 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1536 transitions. [2022-04-06 16:39:54,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-04-06 16:39:54,040 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:39:54,040 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:39:54,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-04-06 16:39:54,263 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 [2022-04-06 16:39:54,263 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:39:54,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:39:54,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1787026468, now seen corresponding path program 7 times [2022-04-06 16:39:54,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:54,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [455729826] [2022-04-06 16:39:54,264 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:39:54,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1787026468, now seen corresponding path program 8 times [2022-04-06 16:39:54,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:39:54,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853135306] [2022-04-06 16:39:54,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:39:54,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:39:54,271 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:39:54,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1635569196] [2022-04-06 16:39:54,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:39:54,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:39:54,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:39:54,274 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:39:54,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-04-06 16:39:54,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:39:54,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-04-06 16:39:54,342 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 16:39:54,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 16:39:54,420 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 16:39:54,421 INFO L130 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found a feasible trace [2022-04-06 16:39:54,421 INFO L618 BasicCegarLoop]: Counterexample is feasible [2022-04-06 16:39:54,423 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 16:39:54,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-04-06 16:39:54,637 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 [2022-04-06 16:39:54,640 INFO L719 BasicCegarLoop]: Path program histogram: [8, 6, 6, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2] [2022-04-06 16:39:54,642 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 16:39:54,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 04:39:54 BoogieIcfgContainer [2022-04-06 16:39:54,656 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 16:39:54,656 INFO L158 Benchmark]: Toolchain (without parser) took 39665.54ms. Allocated memory was 170.9MB in the beginning and 360.7MB in the end (delta: 189.8MB). Free memory was 122.2MB in the beginning and 259.2MB in the end (delta: -137.0MB). Peak memory consumption was 51.9MB. Max. memory is 8.0GB. [2022-04-06 16:39:54,656 INFO L158 Benchmark]: CDTParser took 0.96ms. Allocated memory is still 170.9MB. Free memory is still 138.6MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 16:39:54,657 INFO L158 Benchmark]: CACSL2BoogieTranslator took 274.01ms. Allocated memory is still 170.9MB. Free memory was 122.0MB in the beginning and 148.5MB in the end (delta: -26.4MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-04-06 16:39:54,657 INFO L158 Benchmark]: Boogie Preprocessor took 34.96ms. Allocated memory is still 170.9MB. Free memory was 148.5MB in the beginning and 147.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-06 16:39:54,657 INFO L158 Benchmark]: RCFGBuilder took 299.36ms. Allocated memory is still 170.9MB. Free memory was 147.0MB in the beginning and 135.3MB in the end (delta: 11.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-04-06 16:39:54,657 INFO L158 Benchmark]: TraceAbstraction took 39052.09ms. Allocated memory was 170.9MB in the beginning and 360.7MB in the end (delta: 189.8MB). Free memory was 134.6MB in the beginning and 259.2MB in the end (delta: -124.5MB). Peak memory consumption was 65.8MB. Max. memory is 8.0GB. [2022-04-06 16:39:54,658 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.96ms. Allocated memory is still 170.9MB. Free memory is still 138.6MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 274.01ms. Allocated memory is still 170.9MB. Free memory was 122.0MB in the beginning and 148.5MB in the end (delta: -26.4MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 34.96ms. Allocated memory is still 170.9MB. Free memory was 148.5MB in the beginning and 147.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 299.36ms. Allocated memory is still 170.9MB. Free memory was 147.0MB in the beginning and 135.3MB in the end (delta: 11.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 39052.09ms. Allocated memory was 170.9MB in the beginning and 360.7MB in the end (delta: 189.8MB). Free memory was 134.6MB in the beginning and 259.2MB in the end (delta: -124.5MB). Peak memory consumption was 65.8MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; [L20] int x, y; [L21] long long a, b, p, q, r, s; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) [L8] COND FALSE !(!cond) [L24] RET assume_abort_if_not(x >= 1) [L25] CALL assume_abort_if_not(y >= 1) [L8] COND FALSE !(!cond) [L25] RET assume_abort_if_not(y >= 1) [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 [L34] EXPR counter++ [L34] COND TRUE counter++<10 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 [L41] EXPR counter++ [L41] COND TRUE counter++<10 [L42] COND TRUE !(c >= b) [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k [L34] EXPR counter++ [L34] COND TRUE counter++<10 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 [L41] EXPR counter++ [L41] COND TRUE counter++<10 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b [L48] EXPR counter++ [L48] COND TRUE counter++<10 [L49] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L49] RET __VERIFIER_assert(a == y * r + x * p) [L50] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L50] RET __VERIFIER_assert(b == x * q + y * s) [L51] CALL __VERIFIER_assert(a == k * b + c) [L11] COND FALSE !(!(cond)) [L51] RET __VERIFIER_assert(a == k * b + c) [L52] CALL __VERIFIER_assert(v == b * d) [L11] COND FALSE !(!(cond)) [L52] RET __VERIFIER_assert(v == b * d) [L54] COND TRUE !(c >= 2 * v) [L59] c = c - v [L60] k = k + d [L41] EXPR counter++ [L41] COND TRUE counter++<10 [L42] COND TRUE !(c >= b) [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k [L34] EXPR counter++ [L34] COND TRUE counter++<10 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 [L41] EXPR counter++ [L41] COND TRUE counter++<10 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b [L48] EXPR counter++ [L48] COND TRUE counter++<10 [L49] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L49] RET __VERIFIER_assert(a == y * r + x * p) [L50] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L50] RET __VERIFIER_assert(b == x * q + y * s) [L51] CALL __VERIFIER_assert(a == k * b + c) [L11] COND FALSE !(!(cond)) [L51] RET __VERIFIER_assert(a == k * b + c) [L52] CALL __VERIFIER_assert(v == b * d) [L11] COND FALSE !(!(cond)) [L52] RET __VERIFIER_assert(v == b * d) [L54] COND TRUE !(c >= 2 * v) [L59] c = c - v [L60] k = k + d [L41] EXPR counter++ [L41] COND TRUE counter++<10 [L42] COND TRUE !(c >= b) [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k [L34] EXPR counter++ [L34] COND FALSE !(counter++<10) [L73] CALL __VERIFIER_assert(p*x - q*x + r*y - s*y == a) [L11] COND TRUE !(cond) [L13] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 39.0s, OverallIterations: 35, TraceHistogramMax: 9, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.1s, AutomataDifference: 9.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2416 SdHoareTripleChecker+Valid, 5.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2302 mSDsluCounter, 8580 SdHoareTripleChecker+Invalid, 4.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 6652 mSDsCounter, 1226 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5977 IncrementalHoareTripleChecker+Invalid, 7203 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1226 mSolverCounterUnsat, 1928 mSDtfsCounter, 5977 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3502 GetRequests, 3037 SyntacticMatches, 22 SemanticMatches, 443 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 7.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1160occurred in iteration=34, InterpolantAutomatonStates: 364, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.5s AutomataMinimizationTime, 34 MinimizatonAttempts, 848 StatesRemovedByMinimization, 30 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-04-06 16:39:54,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...