/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-18 02:31:04,947 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 02:31:04,949 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 02:31:05,001 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 02:31:05,031 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 02:31:05,032 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 02:31:05,032 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 02:31:05,033 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-18 02:31:05,042 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 02:31:05,042 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 02:31:05,043 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 02:31:05,043 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 02:31:05,044 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 02:31:05,044 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 02:31:05,044 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 02:31:05,044 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 02:31:05,044 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 02:31:05,044 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 02:31:05,045 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 02:31:05,045 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 02:31:05,045 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 02:31:05,045 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 02:31:05,045 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 02:31:05,045 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 02:31:05,045 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 02:31:05,046 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-18 02:31:05,046 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-18 02:31:05,046 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-18 02:31:05,046 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 02:31:05,046 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-18 02:31:05,046 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 02:31:05,291 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 02:31:05,317 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 02:31:05,319 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 02:31:05,320 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 02:31:05,322 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 02:31:05,323 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound50.c [2022-03-18 02:31:05,395 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3328524e7/a2526fb6080b4cf7a452c09e61fb0391/FLAG90ace495b [2022-03-18 02:31:05,812 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 02:31:05,813 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound50.c [2022-03-18 02:31:05,818 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3328524e7/a2526fb6080b4cf7a452c09e61fb0391/FLAG90ace495b [2022-03-18 02:31:06,235 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3328524e7/a2526fb6080b4cf7a452c09e61fb0391 [2022-03-18 02:31:06,239 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 02:31:06,240 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 02:31:06,243 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 02:31:06,244 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 02:31:06,247 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 02:31:06,248 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 02:31:06" (1/1) ... [2022-03-18 02:31:06,249 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16911993 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:31:06, skipping insertion in model container [2022-03-18 02:31:06,249 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 02:31:06" (1/1) ... [2022-03-18 02:31:06,255 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 02:31:06,273 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 02:31:06,417 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/egcd-ll_unwindbound50.c[489,502] [2022-03-18 02:31:06,436 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 02:31:06,442 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 02:31:06,451 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/egcd-ll_unwindbound50.c[489,502] [2022-03-18 02:31:06,458 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 02:31:06,469 INFO L208 MainTranslator]: Completed translation [2022-03-18 02:31:06,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:31:06 WrapperNode [2022-03-18 02:31:06,470 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 02:31:06,471 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 02:31:06,471 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 02:31:06,471 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 02:31:06,481 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:31:06" (1/1) ... [2022-03-18 02:31:06,482 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:31:06" (1/1) ... [2022-03-18 02:31:06,491 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:31:06" (1/1) ... [2022-03-18 02:31:06,492 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:31:06" (1/1) ... [2022-03-18 02:31:06,506 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:31:06" (1/1) ... [2022-03-18 02:31:06,509 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:31:06" (1/1) ... [2022-03-18 02:31:06,510 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:31:06" (1/1) ... [2022-03-18 02:31:06,512 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 02:31:06,513 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 02:31:06,513 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 02:31:06,513 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 02:31:06,514 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:31:06" (1/1) ... [2022-03-18 02:31:06,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 02:31:06,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:31:06,552 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-18 02:31:06,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-18 02:31:06,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 02:31:06,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 02:31:06,598 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 02:31:06,598 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 02:31:06,599 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 02:31:06,599 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 02:31:06,599 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 02:31:06,599 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 02:31:06,599 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 02:31:06,599 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 02:31:06,600 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 02:31:06,600 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 02:31:06,600 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 02:31:06,600 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 02:31:06,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 02:31:06,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 02:31:06,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 02:31:06,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 02:31:06,603 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 02:31:06,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 02:31:06,663 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 02:31:06,664 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 02:31:06,799 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 02:31:06,805 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 02:31:06,805 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-18 02:31:06,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 02:31:06 BoogieIcfgContainer [2022-03-18 02:31:06,807 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 02:31:06,809 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 02:31:06,809 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 02:31:06,812 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 02:31:06,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 02:31:06" (1/3) ... [2022-03-18 02:31:06,813 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cb1c46b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 02:31:06, skipping insertion in model container [2022-03-18 02:31:06,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:31:06" (2/3) ... [2022-03-18 02:31:06,814 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cb1c46b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 02:31:06, skipping insertion in model container [2022-03-18 02:31:06,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 02:31:06" (3/3) ... [2022-03-18 02:31:06,815 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_unwindbound50.c [2022-03-18 02:31:06,821 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-18 02:31:06,821 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 02:31:06,864 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 02:31:06,870 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-18 02:31:06,871 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 02:31:06,885 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-18 02:31:06,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-18 02:31:06,892 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:31:06,893 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:31:06,893 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:31:06,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:31:06,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1226702723, now seen corresponding path program 1 times [2022-03-18 02:31:06,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:06,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [414298404] [2022-03-18 02:31:06,921 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:31:06,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1226702723, now seen corresponding path program 2 times [2022-03-18 02:31:06,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:31:06,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481384041] [2022-03-18 02:31:06,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:31:06,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:31:07,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 02:31:07,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 02:31:07,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 02:31:07,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 02:31:07,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 02:31:07,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-18 02:31:07,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 02:31:07,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 02:31:07,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:31:07,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481384041] [2022-03-18 02:31:07,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481384041] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:31:07,194 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:31:07,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 02:31:07,197 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:31:07,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [414298404] [2022-03-18 02:31:07,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [414298404] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:31:07,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:31:07,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 02:31:07,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706628735] [2022-03-18 02:31:07,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:31:07,205 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 02:31:07,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:07,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 02:31:07,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 02:31:07,241 INFO L87 Difference]: Start difference. First operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 02:31:07,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:31:07,368 INFO L93 Difference]: Finished difference Result 64 states and 97 transitions. [2022-03-18 02:31:07,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 02:31:07,370 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-03-18 02:31:07,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:31:07,381 INFO L225 Difference]: With dead ends: 64 [2022-03-18 02:31:07,381 INFO L226 Difference]: Without dead ends: 31 [2022-03-18 02:31:07,385 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 02:31:07,389 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:31:07,391 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 45 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:31:07,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-18 02:31:07,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2022-03-18 02:31:07,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-18 02:31:07,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2022-03-18 02:31:07,438 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 22 [2022-03-18 02:31:07,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:31:07,438 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2022-03-18 02:31:07,439 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 02:31:07,439 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2022-03-18 02:31:07,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-18 02:31:07,440 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:31:07,440 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:31:07,441 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 02:31:07,441 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:31:07,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:31:07,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1346542817, now seen corresponding path program 1 times [2022-03-18 02:31:07,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:07,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [804569868] [2022-03-18 02:31:07,443 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:31:07,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1346542817, now seen corresponding path program 2 times [2022-03-18 02:31:07,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:31:07,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685231755] [2022-03-18 02:31:07,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:31:07,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:31:07,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 02:31:07,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 02:31:07,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 02:31:07,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 02:31:07,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 02:31:07,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-18 02:31:07,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 02:31:07,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 02:31:07,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:31:07,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685231755] [2022-03-18 02:31:07,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685231755] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:31:07,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:31:07,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:31:07,542 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:31:07,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [804569868] [2022-03-18 02:31:07,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [804569868] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:31:07,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:31:07,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:31:07,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178617424] [2022-03-18 02:31:07,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:31:07,544 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 02:31:07,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:07,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 02:31:07,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 02:31:07,545 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 02:31:07,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:31:07,683 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2022-03-18 02:31:07,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 02:31:07,692 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-03-18 02:31:07,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:31:07,694 INFO L225 Difference]: With dead ends: 42 [2022-03-18 02:31:07,695 INFO L226 Difference]: Without dead ends: 32 [2022-03-18 02:31:07,695 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 02:31:07,696 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 13 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:31:07,697 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 65 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:31:07,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-18 02:31:07,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-18 02:31:07,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-18 02:31:07,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-03-18 02:31:07,709 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 23 [2022-03-18 02:31:07,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:31:07,711 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-03-18 02:31:07,711 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 02:31:07,711 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-03-18 02:31:07,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-18 02:31:07,712 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:31:07,712 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:31:07,713 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 02:31:07,713 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:31:07,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:31:07,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1348211113, now seen corresponding path program 1 times [2022-03-18 02:31:07,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:07,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1354484584] [2022-03-18 02:31:07,714 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:31:07,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1348211113, now seen corresponding path program 2 times [2022-03-18 02:31:07,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:31:07,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826528655] [2022-03-18 02:31:07,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:31:07,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:31:07,746 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:31:07,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [343801644] [2022-03-18 02:31:07,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:31:07,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:31:07,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:31:07,752 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:31:07,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 02:31:07,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-18 02:31:07,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:31:07,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 02:31:07,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:31:08,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 02:31:08,005 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 02:31:08,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:31:08,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826528655] [2022-03-18 02:31:08,005 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:31:08,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343801644] [2022-03-18 02:31:08,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343801644] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:31:08,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:31:08,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:31:08,007 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:31:08,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1354484584] [2022-03-18 02:31:08,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1354484584] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:31:08,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:31:08,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:31:08,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233503952] [2022-03-18 02:31:08,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:31:08,008 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 02:31:08,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:08,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 02:31:08,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 02:31:08,010 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 02:31:08,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:31:08,067 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2022-03-18 02:31:08,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 02:31:08,068 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 23 [2022-03-18 02:31:08,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:31:08,069 INFO L225 Difference]: With dead ends: 49 [2022-03-18 02:31:08,069 INFO L226 Difference]: Without dead ends: 47 [2022-03-18 02:31:08,070 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 02:31:08,071 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 8 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:31:08,071 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 146 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:31:08,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-18 02:31:08,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-03-18 02:31:08,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 26 states have internal predecessors, (31), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-18 02:31:08,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2022-03-18 02:31:08,101 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 23 [2022-03-18 02:31:08,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:31:08,101 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2022-03-18 02:31:08,102 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 02:31:08,102 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2022-03-18 02:31:08,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-18 02:31:08,102 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:31:08,103 INFO L500 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] [2022-03-18 02:31:08,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 02:31:08,330 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:31:08,330 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:31:08,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:31:08,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1060153012, now seen corresponding path program 1 times [2022-03-18 02:31:08,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:08,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1665296654] [2022-03-18 02:31:08,332 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:31:08,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1060153012, now seen corresponding path program 2 times [2022-03-18 02:31:08,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:31:08,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525772448] [2022-03-18 02:31:08,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:31:08,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:31:08,347 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:31:08,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [104574114] [2022-03-18 02:31:08,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:31:08,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:31:08,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:31:08,353 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:31:08,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 02:31:08,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:31:08,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:31:08,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 02:31:08,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:31:08,538 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 02:31:08,538 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 02:31:08,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:31:08,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525772448] [2022-03-18 02:31:08,540 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:31:08,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104574114] [2022-03-18 02:31:08,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104574114] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:31:08,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:31:08,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:31:08,541 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:31:08,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1665296654] [2022-03-18 02:31:08,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1665296654] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:31:08,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:31:08,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:31:08,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264932182] [2022-03-18 02:31:08,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:31:08,549 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 02:31:08,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:08,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 02:31:08,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 02:31:08,552 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 02:31:08,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:31:08,609 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2022-03-18 02:31:08,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 02:31:08,609 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-03-18 02:31:08,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:31:08,611 INFO L225 Difference]: With dead ends: 53 [2022-03-18 02:31:08,611 INFO L226 Difference]: Without dead ends: 51 [2022-03-18 02:31:08,615 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 02:31:08,617 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 9 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:31:08,617 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 156 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:31:08,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-18 02:31:08,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-03-18 02:31:08,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 29 states have internal predecessors, (34), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-18 02:31:08,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 66 transitions. [2022-03-18 02:31:08,634 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 66 transitions. Word has length 28 [2022-03-18 02:31:08,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:31:08,635 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 66 transitions. [2022-03-18 02:31:08,635 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 02:31:08,635 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 66 transitions. [2022-03-18 02:31:08,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-18 02:31:08,636 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:31:08,636 INFO L500 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] [2022-03-18 02:31:08,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 02:31:08,836 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,SelfDestructingSolverStorable3 [2022-03-18 02:31:08,837 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:31:08,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:31:08,838 INFO L85 PathProgramCache]: Analyzing trace with hash -560761015, now seen corresponding path program 1 times [2022-03-18 02:31:08,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:08,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [746932989] [2022-03-18 02:31:08,838 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:31:08,839 INFO L85 PathProgramCache]: Analyzing trace with hash -560761015, now seen corresponding path program 2 times [2022-03-18 02:31:08,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:31:08,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025460689] [2022-03-18 02:31:08,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:31:08,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:31:08,849 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:31:08,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [688429376] [2022-03-18 02:31:08,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:31:08,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:31:08,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:31:08,852 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:31:08,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 02:31:08,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:31:08,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:31:08,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 02:31:08,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:31:09,101 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-18 02:31:09,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:31:09,223 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-18 02:31:09,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:31:09,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025460689] [2022-03-18 02:31:09,223 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:31:09,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688429376] [2022-03-18 02:31:09,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688429376] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 02:31:09,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 02:31:09,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-03-18 02:31:09,224 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:31:09,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [746932989] [2022-03-18 02:31:09,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [746932989] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:31:09,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:31:09,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:31:09,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820530579] [2022-03-18 02:31:09,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:31:09,225 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 02:31:09,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:09,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 02:31:09,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-18 02:31:09,226 INFO L87 Difference]: Start difference. First operand 50 states and 66 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 02:31:09,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:31:09,272 INFO L93 Difference]: Finished difference Result 75 states and 107 transitions. [2022-03-18 02:31:09,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 02:31:09,273 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (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 33 [2022-03-18 02:31:09,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:31:09,276 INFO L225 Difference]: With dead ends: 75 [2022-03-18 02:31:09,276 INFO L226 Difference]: Without dead ends: 71 [2022-03-18 02:31:09,276 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-18 02:31:09,277 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 9 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:31:09,277 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 144 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:31:09,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-18 02:31:09,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-03-18 02:31:09,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 40 states have internal predecessors, (48), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-18 02:31:09,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 100 transitions. [2022-03-18 02:31:09,293 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 100 transitions. Word has length 33 [2022-03-18 02:31:09,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:31:09,293 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 100 transitions. [2022-03-18 02:31:09,293 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 02:31:09,293 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 100 transitions. [2022-03-18 02:31:09,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-18 02:31:09,294 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:31:09,294 INFO L500 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] [2022-03-18 02:31:09,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 02:31:09,515 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:31:09,516 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:31:09,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:31:09,516 INFO L85 PathProgramCache]: Analyzing trace with hash 201438379, now seen corresponding path program 1 times [2022-03-18 02:31:09,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:09,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1349080839] [2022-03-18 02:31:09,517 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:31:09,517 INFO L85 PathProgramCache]: Analyzing trace with hash 201438379, now seen corresponding path program 2 times [2022-03-18 02:31:09,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:31:09,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427767103] [2022-03-18 02:31:09,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:31:09,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:31:09,528 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:31:09,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [422095117] [2022-03-18 02:31:09,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:31:09,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:31:09,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:31:09,530 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:31:09,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 02:31:09,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:31:09,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:31:09,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 02:31:09,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:31:09,680 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-18 02:31:09,680 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 02:31:09,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:31:09,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427767103] [2022-03-18 02:31:09,681 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:31:09,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422095117] [2022-03-18 02:31:09,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422095117] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:31:09,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:31:09,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:31:09,682 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:31:09,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1349080839] [2022-03-18 02:31:09,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1349080839] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:31:09,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:31:09,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:31:09,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062299275] [2022-03-18 02:31:09,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:31:09,683 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 02:31:09,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:09,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 02:31:09,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 02:31:09,684 INFO L87 Difference]: Start difference. First operand 71 states and 100 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-18 02:31:09,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:31:09,725 INFO L93 Difference]: Finished difference Result 87 states and 123 transitions. [2022-03-18 02:31:09,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 02:31:09,725 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2022-03-18 02:31:09,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:31:09,727 INFO L225 Difference]: With dead ends: 87 [2022-03-18 02:31:09,727 INFO L226 Difference]: Without dead ends: 85 [2022-03-18 02:31:09,727 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 02:31:09,728 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 5 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:31:09,728 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 153 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:31:09,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-03-18 02:31:09,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 78. [2022-03-18 02:31:09,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 46 states have internal predecessors, (51), 31 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (27), 23 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-18 02:31:09,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 109 transitions. [2022-03-18 02:31:09,743 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 109 transitions. Word has length 39 [2022-03-18 02:31:09,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:31:09,743 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 109 transitions. [2022-03-18 02:31:09,743 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-18 02:31:09,744 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 109 transitions. [2022-03-18 02:31:09,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-18 02:31:09,745 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:31:09,745 INFO L500 BasicCegarLoop]: trace histogram [4, 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] [2022-03-18 02:31:09,764 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-18 02:31:09,949 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:31:09,950 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:31:09,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:31:09,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1085077998, now seen corresponding path program 1 times [2022-03-18 02:31:09,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:09,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1028595108] [2022-03-18 02:31:09,951 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:31:09,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1085077998, now seen corresponding path program 2 times [2022-03-18 02:31:09,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:31:09,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695737599] [2022-03-18 02:31:09,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:31:09,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:31:09,961 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:31:09,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1703623220] [2022-03-18 02:31:09,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:31:09,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:31:09,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:31:09,963 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:31:09,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 02:31:10,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:31:10,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:31:10,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 02:31:10,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:31:10,114 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-18 02:31:10,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:31:10,223 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-18 02:31:10,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:31:10,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695737599] [2022-03-18 02:31:10,224 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:31:10,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703623220] [2022-03-18 02:31:10,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703623220] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:31:10,224 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:31:10,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-18 02:31:10,224 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:31:10,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1028595108] [2022-03-18 02:31:10,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1028595108] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:31:10,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:31:10,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:31:10,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402709649] [2022-03-18 02:31:10,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:31:10,226 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 02:31:10,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:10,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 02:31:10,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-18 02:31:10,227 INFO L87 Difference]: Start difference. First operand 78 states and 109 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-18 02:31:10,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:31:10,271 INFO L93 Difference]: Finished difference Result 121 states and 152 transitions. [2022-03-18 02:31:10,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 02:31:10,271 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2022-03-18 02:31:10,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:31:10,273 INFO L225 Difference]: With dead ends: 121 [2022-03-18 02:31:10,273 INFO L226 Difference]: Without dead ends: 102 [2022-03-18 02:31:10,274 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-18 02:31:10,275 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 13 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:31:10,275 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 130 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:31:10,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-03-18 02:31:10,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2022-03-18 02:31:10,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 63 states have internal predecessors, (69), 31 states have call successors, (31), 13 states have call predecessors, (31), 11 states have return successors, (27), 23 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-18 02:31:10,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 127 transitions. [2022-03-18 02:31:10,304 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 127 transitions. Word has length 42 [2022-03-18 02:31:10,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:31:10,304 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 127 transitions. [2022-03-18 02:31:10,304 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-18 02:31:10,304 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 127 transitions. [2022-03-18 02:31:10,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-18 02:31:10,305 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:31:10,305 INFO L500 BasicCegarLoop]: trace histogram [4, 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] [2022-03-18 02:31:10,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 02:31:10,508 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:31:10,509 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:31:10,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:31:10,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1083409702, now seen corresponding path program 1 times [2022-03-18 02:31:10,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:10,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [610519602] [2022-03-18 02:31:10,509 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:31:10,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1083409702, now seen corresponding path program 2 times [2022-03-18 02:31:10,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:31:10,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139964624] [2022-03-18 02:31:10,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:31:10,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:31:10,520 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:31:10,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1169729864] [2022-03-18 02:31:10,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:31:10,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:31:10,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:31:10,522 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:31:10,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 02:31:10,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:31:10,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:31:10,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-18 02:31:10,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:31:10,727 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-18 02:31:10,728 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 02:31:10,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:31:10,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139964624] [2022-03-18 02:31:10,728 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:31:10,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169729864] [2022-03-18 02:31:10,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169729864] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:31:10,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:31:10,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:31:10,729 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:31:10,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [610519602] [2022-03-18 02:31:10,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [610519602] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:31:10,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:31:10,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:31:10,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204834969] [2022-03-18 02:31:10,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:31:10,730 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 02:31:10,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:10,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 02:31:10,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 02:31:10,731 INFO L87 Difference]: Start difference. First operand 100 states and 127 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-18 02:31:10,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:31:10,778 INFO L93 Difference]: Finished difference Result 106 states and 132 transitions. [2022-03-18 02:31:10,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 02:31:10,779 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2022-03-18 02:31:10,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:31:10,782 INFO L225 Difference]: With dead ends: 106 [2022-03-18 02:31:10,782 INFO L226 Difference]: Without dead ends: 103 [2022-03-18 02:31:10,783 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 02:31:10,783 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 7 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:31:10,784 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 143 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:31:10,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-18 02:31:10,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-03-18 02:31:10,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 60 states have (on average 1.2) internal successors, (72), 66 states have internal predecessors, (72), 30 states have call successors, (30), 14 states have call predecessors, (30), 12 states have return successors, (26), 22 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-18 02:31:10,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2022-03-18 02:31:10,819 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 42 [2022-03-18 02:31:10,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:31:10,821 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2022-03-18 02:31:10,821 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-18 02:31:10,821 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2022-03-18 02:31:10,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-18 02:31:10,824 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:31:10,825 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:31:10,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 02:31:11,047 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:31:11,048 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:31:11,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:31:11,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1376219446, now seen corresponding path program 1 times [2022-03-18 02:31:11,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:11,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [627273594] [2022-03-18 02:31:11,049 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:31:11,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1376219446, now seen corresponding path program 2 times [2022-03-18 02:31:11,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:31:11,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622095038] [2022-03-18 02:31:11,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:31:11,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:31:11,059 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:31:11,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2087728112] [2022-03-18 02:31:11,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:31:11,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:31:11,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:31:11,064 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:31:11,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 02:31:11,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:31:11,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:31:11,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-18 02:31:11,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:31:11,210 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-18 02:31:11,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:31:11,374 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-18 02:31:11,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:31:11,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622095038] [2022-03-18 02:31:11,375 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:31:11,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087728112] [2022-03-18 02:31:11,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087728112] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:31:11,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:31:11,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-18 02:31:11,375 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:31:11,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [627273594] [2022-03-18 02:31:11,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [627273594] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:31:11,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:31:11,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 02:31:11,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261050264] [2022-03-18 02:31:11,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:31:11,376 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 02:31:11,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:11,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 02:31:11,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-18 02:31:11,378 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-18 02:31:11,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:31:11,507 INFO L93 Difference]: Finished difference Result 118 states and 148 transitions. [2022-03-18 02:31:11,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 02:31:11,508 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2022-03-18 02:31:11,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:31:11,509 INFO L225 Difference]: With dead ends: 118 [2022-03-18 02:31:11,510 INFO L226 Difference]: Without dead ends: 106 [2022-03-18 02:31:11,510 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-18 02:31:11,511 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 16 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:31:11,511 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 147 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:31:11,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-03-18 02:31:11,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2022-03-18 02:31:11,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 67 states have internal predecessors, (71), 31 states have call successors, (31), 13 states have call predecessors, (31), 12 states have return successors, (28), 23 states have call predecessors, (28), 28 states have call successors, (28) [2022-03-18 02:31:11,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 130 transitions. [2022-03-18 02:31:11,526 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 130 transitions. Word has length 44 [2022-03-18 02:31:11,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:31:11,526 INFO L478 AbstractCegarLoop]: Abstraction has 104 states and 130 transitions. [2022-03-18 02:31:11,526 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-18 02:31:11,526 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 130 transitions. [2022-03-18 02:31:11,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-18 02:31:11,527 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:31:11,527 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:31:11,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 02:31:11,749 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:31:11,750 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:31:11,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:31:11,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1137310021, now seen corresponding path program 3 times [2022-03-18 02:31:11,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:11,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1398959366] [2022-03-18 02:31:11,751 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:31:11,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1137310021, now seen corresponding path program 4 times [2022-03-18 02:31:11,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:31:11,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097585318] [2022-03-18 02:31:11,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:31:11,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:31:11,761 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:31:11,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2024461895] [2022-03-18 02:31:11,761 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:31:11,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:31:11,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:31:11,763 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:31:11,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 02:31:11,812 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:31:11,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:31:11,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-18 02:31:11,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:31:12,044 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-18 02:31:12,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:31:12,159 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-18 02:31:12,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:31:12,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097585318] [2022-03-18 02:31:12,160 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:31:12,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024461895] [2022-03-18 02:31:12,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024461895] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:31:12,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:31:12,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-03-18 02:31:12,163 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:31:12,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1398959366] [2022-03-18 02:31:12,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1398959366] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:31:12,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:31:12,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 02:31:12,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478191041] [2022-03-18 02:31:12,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:31:12,164 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 02:31:12,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:12,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 02:31:12,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-18 02:31:12,166 INFO L87 Difference]: Start difference. First operand 104 states and 130 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-18 02:31:12,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:31:12,258 INFO L93 Difference]: Finished difference Result 131 states and 169 transitions. [2022-03-18 02:31:12,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 02:31:12,259 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 47 [2022-03-18 02:31:12,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:31:12,262 INFO L225 Difference]: With dead ends: 131 [2022-03-18 02:31:12,263 INFO L226 Difference]: Without dead ends: 129 [2022-03-18 02:31:12,263 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-18 02:31:12,264 INFO L912 BasicCegarLoop]: 49 mSDtfsCounter, 9 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:31:12,265 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 210 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:31:12,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-03-18 02:31:12,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 124. [2022-03-18 02:31:12,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 79 states have internal predecessors, (87), 37 states have call successors, (37), 15 states have call predecessors, (37), 14 states have return successors, (34), 29 states have call predecessors, (34), 34 states have call successors, (34) [2022-03-18 02:31:12,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 158 transitions. [2022-03-18 02:31:12,293 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 158 transitions. Word has length 47 [2022-03-18 02:31:12,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:31:12,294 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 158 transitions. [2022-03-18 02:31:12,294 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-18 02:31:12,294 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 158 transitions. [2022-03-18 02:31:12,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-18 02:31:12,297 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:31:12,297 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:31:12,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-18 02:31:12,515 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,SelfDestructingSolverStorable9 [2022-03-18 02:31:12,516 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:31:12,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:31:12,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1475439812, now seen corresponding path program 1 times [2022-03-18 02:31:12,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:12,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1258887335] [2022-03-18 02:31:12,517 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:31:12,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1475439812, now seen corresponding path program 2 times [2022-03-18 02:31:12,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:31:12,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044016401] [2022-03-18 02:31:12,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:31:12,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:31:12,525 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:31:12,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1943866338] [2022-03-18 02:31:12,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:31:12,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:31:12,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:31:12,528 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:31:12,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 02:31:12,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:31:12,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:31:12,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-18 02:31:12,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:31:12,880 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 23 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-18 02:31:12,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:31:13,103 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 28 proven. 5 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-18 02:31:13,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:31:13,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044016401] [2022-03-18 02:31:13,103 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:31:13,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943866338] [2022-03-18 02:31:13,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943866338] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:31:13,104 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:31:13,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-03-18 02:31:13,104 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:31:13,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1258887335] [2022-03-18 02:31:13,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1258887335] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:31:13,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:31:13,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 02:31:13,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856832591] [2022-03-18 02:31:13,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:31:13,105 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 02:31:13,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:13,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 02:31:13,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-03-18 02:31:13,106 INFO L87 Difference]: Start difference. First operand 124 states and 158 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-18 02:31:13,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:31:13,341 INFO L93 Difference]: Finished difference Result 160 states and 210 transitions. [2022-03-18 02:31:13,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 02:31:13,342 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 52 [2022-03-18 02:31:13,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:31:13,343 INFO L225 Difference]: With dead ends: 160 [2022-03-18 02:31:13,343 INFO L226 Difference]: Without dead ends: 153 [2022-03-18 02:31:13,344 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-03-18 02:31:13,344 INFO L912 BasicCegarLoop]: 32 mSDtfsCounter, 21 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 02:31:13,345 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 214 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 02:31:13,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-03-18 02:31:13,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2022-03-18 02:31:13,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 87 states have (on average 1.2183908045977012) internal successors, (106), 96 states have internal predecessors, (106), 48 states have call successors, (48), 18 states have call predecessors, (48), 17 states have return successors, (44), 38 states have call predecessors, (44), 44 states have call successors, (44) [2022-03-18 02:31:13,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 198 transitions. [2022-03-18 02:31:13,361 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 198 transitions. Word has length 52 [2022-03-18 02:31:13,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:31:13,362 INFO L478 AbstractCegarLoop]: Abstraction has 153 states and 198 transitions. [2022-03-18 02:31:13,362 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-18 02:31:13,362 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 198 transitions. [2022-03-18 02:31:13,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-18 02:31:13,363 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:31:13,363 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 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] [2022-03-18 02:31:13,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-18 02:31:13,590 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:31:13,590 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:31:13,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:31:13,590 INFO L85 PathProgramCache]: Analyzing trace with hash 220857665, now seen corresponding path program 3 times [2022-03-18 02:31:13,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:13,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2001342989] [2022-03-18 02:31:13,591 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:31:13,591 INFO L85 PathProgramCache]: Analyzing trace with hash 220857665, now seen corresponding path program 4 times [2022-03-18 02:31:13,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:31:13,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099382310] [2022-03-18 02:31:13,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:31:13,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:31:13,600 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:31:13,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1237992075] [2022-03-18 02:31:13,600 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:31:13,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:31:13,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:31:13,602 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:31:13,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-18 02:31:13,652 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:31:13,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:31:13,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 02:31:13,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:31:13,790 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 47 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-18 02:31:13,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:31:13,923 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-18 02:31:13,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:31:13,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099382310] [2022-03-18 02:31:13,924 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:31:13,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237992075] [2022-03-18 02:31:13,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237992075] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:31:13,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:31:13,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-18 02:31:13,925 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:31:13,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2001342989] [2022-03-18 02:31:13,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2001342989] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:31:13,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:31:13,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 02:31:13,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368829655] [2022-03-18 02:31:13,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:31:13,926 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 02:31:13,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:13,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 02:31:13,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-18 02:31:13,926 INFO L87 Difference]: Start difference. First operand 153 states and 198 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-18 02:31:13,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:31:13,994 INFO L93 Difference]: Finished difference Result 199 states and 251 transitions. [2022-03-18 02:31:13,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 02:31:13,995 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 61 [2022-03-18 02:31:13,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:31:13,996 INFO L225 Difference]: With dead ends: 199 [2022-03-18 02:31:13,996 INFO L226 Difference]: Without dead ends: 173 [2022-03-18 02:31:13,997 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-03-18 02:31:13,997 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 15 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:31:13,998 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 136 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:31:13,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-03-18 02:31:14,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2022-03-18 02:31:14,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 104 states have (on average 1.1826923076923077) internal successors, (123), 113 states have internal predecessors, (123), 48 states have call successors, (48), 21 states have call predecessors, (48), 20 states have return successors, (44), 38 states have call predecessors, (44), 44 states have call successors, (44) [2022-03-18 02:31:14,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 215 transitions. [2022-03-18 02:31:14,014 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 215 transitions. Word has length 61 [2022-03-18 02:31:14,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:31:14,015 INFO L478 AbstractCegarLoop]: Abstraction has 173 states and 215 transitions. [2022-03-18 02:31:14,015 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-18 02:31:14,015 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 215 transitions. [2022-03-18 02:31:14,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-18 02:31:14,015 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:31:14,015 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 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] [2022-03-18 02:31:14,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-18 02:31:14,241 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,SelfDestructingSolverStorable11 [2022-03-18 02:31:14,242 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:31:14,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:31:14,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1997533323, now seen corresponding path program 1 times [2022-03-18 02:31:14,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:14,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [567251418] [2022-03-18 02:31:14,243 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:31:14,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1997533323, now seen corresponding path program 2 times [2022-03-18 02:31:14,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:31:14,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814467850] [2022-03-18 02:31:14,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:31:14,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:31:14,250 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:31:14,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [769936433] [2022-03-18 02:31:14,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:31:14,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:31:14,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:31:14,252 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:31:14,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-18 02:31:14,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:31:14,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:31:14,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-18 02:31:14,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:31:14,563 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-18 02:31:14,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:31:14,705 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-03-18 02:31:14,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:31:14,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814467850] [2022-03-18 02:31:14,706 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:31:14,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769936433] [2022-03-18 02:31:14,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769936433] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 02:31:14,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 02:31:14,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2022-03-18 02:31:14,706 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:31:14,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [567251418] [2022-03-18 02:31:14,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [567251418] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:31:14,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:31:14,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:31:14,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707799641] [2022-03-18 02:31:14,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:31:14,707 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 02:31:14,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:14,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 02:31:14,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-18 02:31:14,708 INFO L87 Difference]: Start difference. First operand 173 states and 215 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-18 02:31:14,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:31:14,751 INFO L93 Difference]: Finished difference Result 179 states and 220 transitions. [2022-03-18 02:31:14,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 02:31:14,751 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (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 61 [2022-03-18 02:31:14,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:31:14,753 INFO L225 Difference]: With dead ends: 179 [2022-03-18 02:31:14,753 INFO L226 Difference]: Without dead ends: 174 [2022-03-18 02:31:14,753 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 112 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-18 02:31:14,754 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 7 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:31:14,754 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 114 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:31:14,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-03-18 02:31:14,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2022-03-18 02:31:14,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 107 states have (on average 1.1682242990654206) internal successors, (125), 114 states have internal predecessors, (125), 43 states have call successors, (43), 22 states have call predecessors, (43), 21 states have return successors, (40), 35 states have call predecessors, (40), 40 states have call successors, (40) [2022-03-18 02:31:14,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 208 transitions. [2022-03-18 02:31:14,772 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 208 transitions. Word has length 61 [2022-03-18 02:31:14,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:31:14,773 INFO L478 AbstractCegarLoop]: Abstraction has 172 states and 208 transitions. [2022-03-18 02:31:14,773 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-18 02:31:14,773 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 208 transitions. [2022-03-18 02:31:14,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-18 02:31:14,774 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:31:14,774 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:31:14,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-18 02:31:14,987 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,SelfDestructingSolverStorable12 [2022-03-18 02:31:14,987 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:31:14,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:31:14,988 INFO L85 PathProgramCache]: Analyzing trace with hash 404368620, now seen corresponding path program 5 times [2022-03-18 02:31:14,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:14,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1058246118] [2022-03-18 02:31:14,989 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:31:14,989 INFO L85 PathProgramCache]: Analyzing trace with hash 404368620, now seen corresponding path program 6 times [2022-03-18 02:31:14,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:31:14,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141620888] [2022-03-18 02:31:14,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:31:14,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:31:14,997 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:31:14,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [9757487] [2022-03-18 02:31:14,998 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:31:14,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:31:14,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:31:14,999 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:31:15,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-18 02:31:15,076 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 02:31:15,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:31:15,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-18 02:31:15,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:31:15,478 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 25 proven. 22 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-03-18 02:31:15,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:31:15,774 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 29 proven. 18 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-03-18 02:31:15,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:31:15,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141620888] [2022-03-18 02:31:15,775 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:31:15,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9757487] [2022-03-18 02:31:15,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9757487] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:31:15,775 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:31:15,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2022-03-18 02:31:15,775 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:31:15,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1058246118] [2022-03-18 02:31:15,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1058246118] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:31:15,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:31:15,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 02:31:15,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370433748] [2022-03-18 02:31:15,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:31:15,776 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 02:31:15,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:15,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 02:31:15,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-03-18 02:31:15,777 INFO L87 Difference]: Start difference. First operand 172 states and 208 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-18 02:31:15,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:31:15,974 INFO L93 Difference]: Finished difference Result 199 states and 247 transitions. [2022-03-18 02:31:15,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 02:31:15,975 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 66 [2022-03-18 02:31:15,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:31:15,976 INFO L225 Difference]: With dead ends: 199 [2022-03-18 02:31:15,976 INFO L226 Difference]: Without dead ends: 197 [2022-03-18 02:31:15,977 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-03-18 02:31:15,977 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 16 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:31:15,977 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 242 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:31:15,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-03-18 02:31:15,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 181. [2022-03-18 02:31:15,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 112 states have (on average 1.1696428571428572) internal successors, (131), 119 states have internal predecessors, (131), 46 states have call successors, (46), 23 states have call predecessors, (46), 22 states have return successors, (43), 38 states have call predecessors, (43), 43 states have call successors, (43) [2022-03-18 02:31:15,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 220 transitions. [2022-03-18 02:31:15,997 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 220 transitions. Word has length 66 [2022-03-18 02:31:15,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:31:15,998 INFO L478 AbstractCegarLoop]: Abstraction has 181 states and 220 transitions. [2022-03-18 02:31:15,998 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-18 02:31:15,998 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 220 transitions. [2022-03-18 02:31:15,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-18 02:31:15,999 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:31:15,999 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:31:16,023 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-03-18 02:31:16,214 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,SelfDestructingSolverStorable13 [2022-03-18 02:31:16,215 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:31:16,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:31:16,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1105968494, now seen corresponding path program 3 times [2022-03-18 02:31:16,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:16,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [683130665] [2022-03-18 02:31:16,216 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:31:16,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1105968494, now seen corresponding path program 4 times [2022-03-18 02:31:16,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:31:16,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355545398] [2022-03-18 02:31:16,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:31:16,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:31:16,223 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:31:16,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1370778927] [2022-03-18 02:31:16,224 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:31:16,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:31:16,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:31:16,225 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:31:16,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-18 02:31:16,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:31:16,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:31:16,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-18 02:31:16,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:31:16,651 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 30 proven. 29 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-03-18 02:31:16,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:31:16,976 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 43 proven. 16 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-03-18 02:31:16,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:31:16,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355545398] [2022-03-18 02:31:16,977 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:31:16,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370778927] [2022-03-18 02:31:16,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370778927] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:31:16,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:31:16,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2022-03-18 02:31:16,978 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:31:16,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [683130665] [2022-03-18 02:31:16,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [683130665] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:31:16,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:31:16,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 02:31:16,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906740716] [2022-03-18 02:31:16,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:31:16,979 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 02:31:16,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:16,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 02:31:16,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-18 02:31:16,980 INFO L87 Difference]: Start difference. First operand 181 states and 220 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-18 02:31:17,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:31:17,220 INFO L93 Difference]: Finished difference Result 208 states and 259 transitions. [2022-03-18 02:31:17,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 02:31:17,220 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 66 [2022-03-18 02:31:17,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:31:17,222 INFO L225 Difference]: With dead ends: 208 [2022-03-18 02:31:17,222 INFO L226 Difference]: Without dead ends: 206 [2022-03-18 02:31:17,223 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-03-18 02:31:17,223 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 15 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 02:31:17,223 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 268 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 02:31:17,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-03-18 02:31:17,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 190. [2022-03-18 02:31:17,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 117 states have (on average 1.170940170940171) internal successors, (137), 124 states have internal predecessors, (137), 49 states have call successors, (49), 24 states have call predecessors, (49), 23 states have return successors, (46), 41 states have call predecessors, (46), 46 states have call successors, (46) [2022-03-18 02:31:17,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 232 transitions. [2022-03-18 02:31:17,245 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 232 transitions. Word has length 66 [2022-03-18 02:31:17,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:31:17,246 INFO L478 AbstractCegarLoop]: Abstraction has 190 states and 232 transitions. [2022-03-18 02:31:17,246 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-18 02:31:17,246 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 232 transitions. [2022-03-18 02:31:17,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-18 02:31:17,247 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:31:17,247 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:31:17,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-18 02:31:17,463 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,SelfDestructingSolverStorable14 [2022-03-18 02:31:17,464 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:31:17,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:31:17,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1181721515, now seen corresponding path program 5 times [2022-03-18 02:31:17,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:17,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [941513998] [2022-03-18 02:31:17,464 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:31:17,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1181721515, now seen corresponding path program 6 times [2022-03-18 02:31:17,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:31:17,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18732854] [2022-03-18 02:31:17,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:31:17,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:31:17,475 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:31:17,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1217583046] [2022-03-18 02:31:17,475 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:31:17,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:31:17,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:31:17,477 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:31:17,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-18 02:31:17,529 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 02:31:17,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:31:17,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-18 02:31:17,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:31:17,824 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 27 proven. 27 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-03-18 02:31:17,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:31:18,098 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 31 proven. 18 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-03-18 02:31:18,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:31:18,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18732854] [2022-03-18 02:31:18,099 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:31:18,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217583046] [2022-03-18 02:31:18,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217583046] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:31:18,099 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:31:18,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2022-03-18 02:31:18,100 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:31:18,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [941513998] [2022-03-18 02:31:18,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [941513998] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:31:18,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:31:18,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 02:31:18,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901656941] [2022-03-18 02:31:18,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:31:18,100 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 02:31:18,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:18,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 02:31:18,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-03-18 02:31:18,101 INFO L87 Difference]: Start difference. First operand 190 states and 232 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-03-18 02:31:18,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:31:18,413 INFO L93 Difference]: Finished difference Result 214 states and 271 transitions. [2022-03-18 02:31:18,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 02:31:18,414 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 71 [2022-03-18 02:31:18,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:31:18,415 INFO L225 Difference]: With dead ends: 214 [2022-03-18 02:31:18,415 INFO L226 Difference]: Without dead ends: 208 [2022-03-18 02:31:18,416 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-03-18 02:31:18,416 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 14 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 02:31:18,416 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 261 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 02:31:18,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-03-18 02:31:18,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 192. [2022-03-18 02:31:18,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 117 states have (on average 1.170940170940171) internal successors, (137), 125 states have internal predecessors, (137), 51 states have call successors, (51), 24 states have call predecessors, (51), 23 states have return successors, (48), 42 states have call predecessors, (48), 48 states have call successors, (48) [2022-03-18 02:31:18,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 236 transitions. [2022-03-18 02:31:18,438 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 236 transitions. Word has length 71 [2022-03-18 02:31:18,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:31:18,439 INFO L478 AbstractCegarLoop]: Abstraction has 192 states and 236 transitions. [2022-03-18 02:31:18,439 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-03-18 02:31:18,439 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 236 transitions. [2022-03-18 02:31:18,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-18 02:31:18,440 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:31:18,440 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:31:18,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-18 02:31:18,655 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:31:18,655 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:31:18,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:31:18,656 INFO L85 PathProgramCache]: Analyzing trace with hash 787354729, now seen corresponding path program 3 times [2022-03-18 02:31:18,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:18,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1578559115] [2022-03-18 02:31:18,657 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:31:18,657 INFO L85 PathProgramCache]: Analyzing trace with hash 787354729, now seen corresponding path program 4 times [2022-03-18 02:31:18,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:31:18,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804248072] [2022-03-18 02:31:18,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:31:18,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:31:18,663 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:31:18,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1705124634] [2022-03-18 02:31:18,664 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:31:18,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:31:18,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:31:18,665 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:31:18,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-18 02:31:18,719 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:31:18,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:31:18,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-18 02:31:18,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:31:19,078 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-03-18 02:31:19,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:31:19,399 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 35 proven. 19 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-03-18 02:31:19,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:31:19,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804248072] [2022-03-18 02:31:19,400 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:31:19,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705124634] [2022-03-18 02:31:19,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705124634] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:31:19,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:31:19,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2022-03-18 02:31:19,401 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:31:19,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1578559115] [2022-03-18 02:31:19,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1578559115] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:31:19,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:31:19,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 02:31:19,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585039003] [2022-03-18 02:31:19,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:31:19,401 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 02:31:19,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:19,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 02:31:19,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-03-18 02:31:19,402 INFO L87 Difference]: Start difference. First operand 192 states and 236 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-18 02:31:19,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:31:19,634 INFO L93 Difference]: Finished difference Result 219 states and 281 transitions. [2022-03-18 02:31:19,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 02:31:19,635 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 71 [2022-03-18 02:31:19,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:31:19,636 INFO L225 Difference]: With dead ends: 219 [2022-03-18 02:31:19,637 INFO L226 Difference]: Without dead ends: 210 [2022-03-18 02:31:19,638 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-03-18 02:31:19,638 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 16 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 02:31:19,638 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 220 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 02:31:19,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-03-18 02:31:19,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 208. [2022-03-18 02:31:19,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 126 states have (on average 1.1825396825396826) internal successors, (149), 134 states have internal predecessors, (149), 57 states have call successors, (57), 25 states have call predecessors, (57), 24 states have return successors, (54), 48 states have call predecessors, (54), 54 states have call successors, (54) [2022-03-18 02:31:19,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 260 transitions. [2022-03-18 02:31:19,665 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 260 transitions. Word has length 71 [2022-03-18 02:31:19,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:31:19,665 INFO L478 AbstractCegarLoop]: Abstraction has 208 states and 260 transitions. [2022-03-18 02:31:19,665 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-18 02:31:19,665 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 260 transitions. [2022-03-18 02:31:19,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-18 02:31:19,666 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:31:19,666 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:31:19,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-18 02:31:19,871 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,SelfDestructingSolverStorable16 [2022-03-18 02:31:19,872 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:31:19,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:31:19,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1898774094, now seen corresponding path program 5 times [2022-03-18 02:31:19,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:19,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1257675602] [2022-03-18 02:31:19,872 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:31:19,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1898774094, now seen corresponding path program 6 times [2022-03-18 02:31:19,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:31:19,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240771568] [2022-03-18 02:31:19,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:31:19,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:31:19,879 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:31:19,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [103620346] [2022-03-18 02:31:19,880 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:31:19,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:31:19,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:31:19,889 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:31:19,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-18 02:31:19,946 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-18 02:31:19,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:31:19,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-18 02:31:19,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:31:20,106 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 18 proven. 135 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-18 02:31:20,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:31:20,265 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 18 proven. 27 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-03-18 02:31:20,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:31:20,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240771568] [2022-03-18 02:31:20,266 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:31:20,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103620346] [2022-03-18 02:31:20,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103620346] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:31:20,266 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:31:20,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-03-18 02:31:20,266 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:31:20,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1257675602] [2022-03-18 02:31:20,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1257675602] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:31:20,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:31:20,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-18 02:31:20,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662674900] [2022-03-18 02:31:20,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:31:20,267 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 02:31:20,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:20,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 02:31:20,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-03-18 02:31:20,268 INFO L87 Difference]: Start difference. First operand 208 states and 260 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-18 02:31:20,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:31:20,359 INFO L93 Difference]: Finished difference Result 277 states and 329 transitions. [2022-03-18 02:31:20,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 02:31:20,360 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 80 [2022-03-18 02:31:20,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:31:20,361 INFO L225 Difference]: With dead ends: 277 [2022-03-18 02:31:20,361 INFO L226 Difference]: Without dead ends: 250 [2022-03-18 02:31:20,362 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-03-18 02:31:20,362 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 10 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:31:20,363 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 163 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:31:20,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-03-18 02:31:20,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 229. [2022-03-18 02:31:20,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 146 states have (on average 1.143835616438356) internal successors, (167), 153 states have internal predecessors, (167), 52 states have call successors, (52), 31 states have call predecessors, (52), 30 states have return successors, (49), 44 states have call predecessors, (49), 49 states have call successors, (49) [2022-03-18 02:31:20,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 268 transitions. [2022-03-18 02:31:20,402 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 268 transitions. Word has length 80 [2022-03-18 02:31:20,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:31:20,402 INFO L478 AbstractCegarLoop]: Abstraction has 229 states and 268 transitions. [2022-03-18 02:31:20,402 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-18 02:31:20,402 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 268 transitions. [2022-03-18 02:31:20,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-18 02:31:20,403 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:31:20,403 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:31:20,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-18 02:31:20,611 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,SelfDestructingSolverStorable17 [2022-03-18 02:31:20,612 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:31:20,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:31:20,612 INFO L85 PathProgramCache]: Analyzing trace with hash 629296923, now seen corresponding path program 7 times [2022-03-18 02:31:20,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:20,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [234509916] [2022-03-18 02:31:20,613 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:31:20,613 INFO L85 PathProgramCache]: Analyzing trace with hash 629296923, now seen corresponding path program 8 times [2022-03-18 02:31:20,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:31:20,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128955717] [2022-03-18 02:31:20,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:31:20,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:31:20,624 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:31:20,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [542411545] [2022-03-18 02:31:20,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:31:20,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:31:20,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:31:20,626 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:31:20,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-18 02:31:20,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:31:20,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:31:20,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-18 02:31:20,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:31:21,289 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 23 proven. 33 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-03-18 02:31:21,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:31:21,554 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 20 proven. 33 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-18 02:31:21,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:31:21,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128955717] [2022-03-18 02:31:21,554 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:31:21,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542411545] [2022-03-18 02:31:21,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542411545] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:31:21,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:31:21,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2022-03-18 02:31:21,555 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:31:21,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [234509916] [2022-03-18 02:31:21,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [234509916] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:31:21,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:31:21,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 02:31:21,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150719690] [2022-03-18 02:31:21,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:31:21,555 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 02:31:21,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:21,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 02:31:21,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-03-18 02:31:21,556 INFO L87 Difference]: Start difference. First operand 229 states and 268 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-18 02:31:21,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:31:21,938 INFO L93 Difference]: Finished difference Result 256 states and 307 transitions. [2022-03-18 02:31:21,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 02:31:21,939 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 85 [2022-03-18 02:31:21,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:31:21,941 INFO L225 Difference]: With dead ends: 256 [2022-03-18 02:31:21,941 INFO L226 Difference]: Without dead ends: 254 [2022-03-18 02:31:21,941 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 155 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-03-18 02:31:21,941 INFO L912 BasicCegarLoop]: 55 mSDtfsCounter, 25 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 02:31:21,942 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 374 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 02:31:21,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-03-18 02:31:21,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 238. [2022-03-18 02:31:21,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 151 states have (on average 1.1456953642384107) internal successors, (173), 158 states have internal predecessors, (173), 55 states have call successors, (55), 32 states have call predecessors, (55), 31 states have return successors, (52), 47 states have call predecessors, (52), 52 states have call successors, (52) [2022-03-18 02:31:21,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 280 transitions. [2022-03-18 02:31:21,971 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 280 transitions. Word has length 85 [2022-03-18 02:31:21,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:31:21,972 INFO L478 AbstractCegarLoop]: Abstraction has 238 states and 280 transitions. [2022-03-18 02:31:21,972 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-18 02:31:21,972 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 280 transitions. [2022-03-18 02:31:21,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-18 02:31:21,973 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:31:21,973 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:31:21,991 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-03-18 02:31:22,178 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:31:22,179 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:31:22,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:31:22,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1330896797, now seen corresponding path program 7 times [2022-03-18 02:31:22,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:22,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [182872906] [2022-03-18 02:31:22,180 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:31:22,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1330896797, now seen corresponding path program 8 times [2022-03-18 02:31:22,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:31:22,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262378082] [2022-03-18 02:31:22,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:31:22,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:31:22,187 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:31:22,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1464707128] [2022-03-18 02:31:22,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:31:22,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:31:22,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:31:22,189 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:31:22,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-18 02:31:22,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:31:22,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:31:22,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-18 02:31:22,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:31:22,855 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 20 proven. 33 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-18 02:31:22,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:31:23,162 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 20 proven. 33 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-18 02:31:23,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:31:23,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262378082] [2022-03-18 02:31:23,162 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:31:23,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464707128] [2022-03-18 02:31:23,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464707128] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:31:23,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:31:23,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2022-03-18 02:31:23,163 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:31:23,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [182872906] [2022-03-18 02:31:23,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [182872906] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:31:23,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:31:23,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 02:31:23,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226364327] [2022-03-18 02:31:23,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:31:23,163 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 02:31:23,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:23,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 02:31:23,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-18 02:31:23,164 INFO L87 Difference]: Start difference. First operand 238 states and 280 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-18 02:31:23,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:31:23,393 INFO L93 Difference]: Finished difference Result 286 states and 341 transitions. [2022-03-18 02:31:23,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 02:31:23,394 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 85 [2022-03-18 02:31:23,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:31:23,397 INFO L225 Difference]: With dead ends: 286 [2022-03-18 02:31:23,397 INFO L226 Difference]: Without dead ends: 284 [2022-03-18 02:31:23,398 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-03-18 02:31:23,399 INFO L912 BasicCegarLoop]: 58 mSDtfsCounter, 9 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 02:31:23,399 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 346 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 02:31:23,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-03-18 02:31:23,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 268. [2022-03-18 02:31:23,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 171 states have (on average 1.1403508771929824) internal successors, (195), 178 states have internal predecessors, (195), 61 states have call successors, (61), 36 states have call predecessors, (61), 35 states have return successors, (58), 53 states have call predecessors, (58), 58 states have call successors, (58) [2022-03-18 02:31:23,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 314 transitions. [2022-03-18 02:31:23,440 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 314 transitions. Word has length 85 [2022-03-18 02:31:23,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:31:23,440 INFO L478 AbstractCegarLoop]: Abstraction has 268 states and 314 transitions. [2022-03-18 02:31:23,440 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-18 02:31:23,442 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 314 transitions. [2022-03-18 02:31:23,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-18 02:31:23,443 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:31:23,443 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:31:23,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-18 02:31:23,667 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:31:23,668 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:31:23,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:31:23,668 INFO L85 PathProgramCache]: Analyzing trace with hash 148216665, now seen corresponding path program 9 times [2022-03-18 02:31:23,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:23,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1811229438] [2022-03-18 02:31:23,669 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:31:23,669 INFO L85 PathProgramCache]: Analyzing trace with hash 148216665, now seen corresponding path program 10 times [2022-03-18 02:31:23,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:31:23,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005997735] [2022-03-18 02:31:23,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:31:23,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:31:23,676 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:31:23,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1998178544] [2022-03-18 02:31:23,676 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:31:23,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:31:23,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:31:23,682 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:31:23,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-18 02:31:23,739 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:31:23,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:31:23,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-18 02:31:23,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:31:24,302 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 65 proven. 51 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-03-18 02:31:24,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:31:24,587 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 78 proven. 8 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-03-18 02:31:24,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:31:24,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005997735] [2022-03-18 02:31:24,587 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:31:24,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998178544] [2022-03-18 02:31:24,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998178544] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:31:24,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:31:24,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2022-03-18 02:31:24,588 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:31:24,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1811229438] [2022-03-18 02:31:24,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1811229438] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:31:24,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:31:24,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 02:31:24,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744708062] [2022-03-18 02:31:24,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:31:24,589 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 02:31:24,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:24,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 02:31:24,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-03-18 02:31:24,590 INFO L87 Difference]: Start difference. First operand 268 states and 314 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-18 02:31:25,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:31:25,179 INFO L93 Difference]: Finished difference Result 297 states and 355 transitions. [2022-03-18 02:31:25,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 02:31:25,179 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 85 [2022-03-18 02:31:25,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:31:25,181 INFO L225 Difference]: With dead ends: 297 [2022-03-18 02:31:25,181 INFO L226 Difference]: Without dead ends: 295 [2022-03-18 02:31:25,181 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 154 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-03-18 02:31:25,181 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 16 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 02:31:25,182 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 315 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 02:31:25,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-03-18 02:31:25,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 249. [2022-03-18 02:31:25,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 158 states have (on average 1.1455696202531647) internal successors, (181), 165 states have internal predecessors, (181), 58 states have call successors, (58), 33 states have call predecessors, (58), 32 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2022-03-18 02:31:25,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 294 transitions. [2022-03-18 02:31:25,217 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 294 transitions. Word has length 85 [2022-03-18 02:31:25,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:31:25,217 INFO L478 AbstractCegarLoop]: Abstraction has 249 states and 294 transitions. [2022-03-18 02:31:25,217 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-18 02:31:25,217 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 294 transitions. [2022-03-18 02:31:25,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-18 02:31:25,218 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:31:25,218 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:31:25,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-18 02:31:25,443 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:31:25,444 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:31:25,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:31:25,444 INFO L85 PathProgramCache]: Analyzing trace with hash 849816539, now seen corresponding path program 11 times [2022-03-18 02:31:25,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:25,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1459427058] [2022-03-18 02:31:25,445 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:31:25,445 INFO L85 PathProgramCache]: Analyzing trace with hash 849816539, now seen corresponding path program 12 times [2022-03-18 02:31:25,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:31:25,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801024538] [2022-03-18 02:31:25,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:31:25,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:31:25,452 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:31:25,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1068137423] [2022-03-18 02:31:25,452 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:31:25,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:31:25,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:31:25,457 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:31:25,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-18 02:31:25,554 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 02:31:25,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:31:25,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-18 02:31:25,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:31:25,886 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 66 proven. 33 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2022-03-18 02:31:25,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:31:26,089 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:31:26,096 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:31:52,214 WARN L232 SmtUtils]: Spent 14.40s on a formula simplification. DAG size of input: 63 DAG size of output: 62 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 02:31:52,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:31:52,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801024538] [2022-03-18 02:31:52,217 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:31:52,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068137423] [2022-03-18 02:31:52,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068137423] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 02:31:52,218 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 02:31:52,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-18 02:31:52,218 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:31:52,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1459427058] [2022-03-18 02:31:52,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1459427058] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:31:52,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:31:52,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 02:31:52,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705663467] [2022-03-18 02:31:52,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:31:52,219 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 02:31:52,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:52,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 02:31:52,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=160, Unknown=3, NotChecked=0, Total=210 [2022-03-18 02:31:52,220 INFO L87 Difference]: Start difference. First operand 249 states and 294 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-18 02:31:56,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:31:56,701 INFO L93 Difference]: Finished difference Result 315 states and 392 transitions. [2022-03-18 02:31:56,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 02:31:56,728 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 85 [2022-03-18 02:31:56,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:31:56,730 INFO L225 Difference]: With dead ends: 315 [2022-03-18 02:31:56,730 INFO L226 Difference]: Without dead ends: 309 [2022-03-18 02:31:56,731 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 26.2s TimeCoverageRelationStatistics Valid=67, Invalid=234, Unknown=5, NotChecked=0, Total=306 [2022-03-18 02:31:56,731 INFO L912 BasicCegarLoop]: 51 mSDtfsCounter, 26 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 02:31:56,731 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 288 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 02:31:56,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-03-18 02:31:56,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 265. [2022-03-18 02:31:56,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 167 states have (on average 1.1437125748502994) internal successors, (191), 175 states have internal predecessors, (191), 63 states have call successors, (63), 35 states have call predecessors, (63), 34 states have return successors, (59), 54 states have call predecessors, (59), 59 states have call successors, (59) [2022-03-18 02:31:56,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 313 transitions. [2022-03-18 02:31:56,777 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 313 transitions. Word has length 85 [2022-03-18 02:31:56,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:31:56,777 INFO L478 AbstractCegarLoop]: Abstraction has 265 states and 313 transitions. [2022-03-18 02:31:56,777 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-18 02:31:56,778 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 313 transitions. [2022-03-18 02:31:56,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-03-18 02:31:56,780 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:31:56,780 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:31:56,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-18 02:31:57,006 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,SelfDestructingSolverStorable21 [2022-03-18 02:31:57,006 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:31:57,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:31:57,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1358919972, now seen corresponding path program 13 times [2022-03-18 02:31:57,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:57,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [981239564] [2022-03-18 02:31:57,007 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:31:57,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1358919972, now seen corresponding path program 14 times [2022-03-18 02:31:57,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:31:57,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863455191] [2022-03-18 02:31:57,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:31:57,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:31:57,017 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:31:57,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1987577604] [2022-03-18 02:31:57,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:31:57,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:31:57,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:31:57,020 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:31:57,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-18 02:31:57,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:31:57,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:31:57,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-18 02:31:57,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:31:57,827 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-03-18 02:31:57,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:31:58,359 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-03-18 02:31:58,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:31:58,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863455191] [2022-03-18 02:31:58,359 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:31:58,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987577604] [2022-03-18 02:31:58,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987577604] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:31:58,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:31:58,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-03-18 02:31:58,360 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:31:58,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [981239564] [2022-03-18 02:31:58,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [981239564] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:31:58,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:31:58,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 02:31:58,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309028173] [2022-03-18 02:31:58,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:31:58,361 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 02:31:58,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:58,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 02:31:58,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-03-18 02:31:58,361 INFO L87 Difference]: Start difference. First operand 265 states and 313 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-18 02:31:58,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:31:58,657 INFO L93 Difference]: Finished difference Result 291 states and 354 transitions. [2022-03-18 02:31:58,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 02:31:58,658 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 90 [2022-03-18 02:31:58,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:31:58,660 INFO L225 Difference]: With dead ends: 291 [2022-03-18 02:31:58,660 INFO L226 Difference]: Without dead ends: 285 [2022-03-18 02:31:58,660 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-03-18 02:31:58,661 INFO L912 BasicCegarLoop]: 59 mSDtfsCounter, 10 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 02:31:58,661 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 354 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 02:31:58,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-03-18 02:31:58,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 269. [2022-03-18 02:31:58,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 169 states have (on average 1.1420118343195267) internal successors, (193), 178 states have internal predecessors, (193), 65 states have call successors, (65), 35 states have call predecessors, (65), 34 states have return successors, (61), 55 states have call predecessors, (61), 61 states have call successors, (61) [2022-03-18 02:31:58,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 319 transitions. [2022-03-18 02:31:58,707 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 319 transitions. Word has length 90 [2022-03-18 02:31:58,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:31:58,708 INFO L478 AbstractCegarLoop]: Abstraction has 269 states and 319 transitions. [2022-03-18 02:31:58,708 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-18 02:31:58,708 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 319 transitions. [2022-03-18 02:31:58,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-03-18 02:31:58,709 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:31:58,709 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:31:58,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-18 02:31:58,919 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,SelfDestructingSolverStorable22 [2022-03-18 02:31:58,920 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:31:58,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:31:58,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1753286758, now seen corresponding path program 15 times [2022-03-18 02:31:58,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:58,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [725840803] [2022-03-18 02:31:58,920 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:31:58,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1753286758, now seen corresponding path program 16 times [2022-03-18 02:31:58,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:31:58,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39217176] [2022-03-18 02:31:58,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:31:58,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:31:58,930 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:31:58,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1073581399] [2022-03-18 02:31:58,930 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:31:58,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:31:58,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:31:58,932 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:31:58,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-18 02:31:58,991 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:31:58,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:31:58,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-18 02:31:58,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:31:59,680 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 70 proven. 60 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2022-03-18 02:31:59,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:32:00,334 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 82 proven. 15 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2022-03-18 02:32:00,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:32:00,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39217176] [2022-03-18 02:32:00,335 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:32:00,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073581399] [2022-03-18 02:32:00,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073581399] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:32:00,335 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:32:00,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2022-03-18 02:32:00,335 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:32:00,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [725840803] [2022-03-18 02:32:00,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [725840803] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:32:00,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:32:00,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 02:32:00,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486179036] [2022-03-18 02:32:00,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:32:00,336 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 02:32:00,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:32:00,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 02:32:00,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-03-18 02:32:00,337 INFO L87 Difference]: Start difference. First operand 269 states and 319 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-18 02:32:01,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:32:01,490 INFO L93 Difference]: Finished difference Result 310 states and 377 transitions. [2022-03-18 02:32:01,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 02:32:01,490 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 90 [2022-03-18 02:32:01,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:32:01,492 INFO L225 Difference]: With dead ends: 310 [2022-03-18 02:32:01,492 INFO L226 Difference]: Without dead ends: 304 [2022-03-18 02:32:01,492 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 164 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-03-18 02:32:01,492 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 15 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:32:01,493 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 303 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-18 02:32:01,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-03-18 02:32:01,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 284. [2022-03-18 02:32:01,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 179 states have (on average 1.1396648044692737) internal successors, (204), 188 states have internal predecessors, (204), 68 states have call successors, (68), 37 states have call predecessors, (68), 36 states have return successors, (64), 58 states have call predecessors, (64), 64 states have call successors, (64) [2022-03-18 02:32:01,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 336 transitions. [2022-03-18 02:32:01,548 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 336 transitions. Word has length 90 [2022-03-18 02:32:01,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:32:01,548 INFO L478 AbstractCegarLoop]: Abstraction has 284 states and 336 transitions. [2022-03-18 02:32:01,548 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-18 02:32:01,548 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 336 transitions. [2022-03-18 02:32:01,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-03-18 02:32:01,549 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:32:01,549 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:32:01,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-18 02:32:01,763 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:32:01,763 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:32:01,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:32:01,764 INFO L85 PathProgramCache]: Analyzing trace with hash 27865438, now seen corresponding path program 17 times [2022-03-18 02:32:01,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:32:01,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1195878061] [2022-03-18 02:32:01,764 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:32:01,764 INFO L85 PathProgramCache]: Analyzing trace with hash 27865438, now seen corresponding path program 18 times [2022-03-18 02:32:01,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:32:01,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567819566] [2022-03-18 02:32:01,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:32:01,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:32:01,772 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:32:01,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1582938770] [2022-03-18 02:32:01,772 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:32:01,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:32:01,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:32:01,773 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:32:01,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-18 02:32:01,875 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 02:32:01,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:32:01,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-18 02:32:01,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:32:05,682 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 71 proven. 34 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2022-03-18 02:32:05,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:32:09,741 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 90 proven. 5 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-03-18 02:32:09,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:32:09,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567819566] [2022-03-18 02:32:09,742 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:32:09,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582938770] [2022-03-18 02:32:09,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582938770] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:32:09,742 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:32:09,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 14 [2022-03-18 02:32:09,742 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:32:09,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1195878061] [2022-03-18 02:32:09,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1195878061] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:32:09,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:32:09,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 02:32:09,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405088132] [2022-03-18 02:32:09,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:32:09,743 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 02:32:09,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:32:09,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 02:32:09,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=143, Unknown=1, NotChecked=0, Total=182 [2022-03-18 02:32:09,744 INFO L87 Difference]: Start difference. First operand 284 states and 336 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-18 02:32:11,910 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 02:32:13,918 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 02:32:15,923 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 02:32:24,407 WARN L232 SmtUtils]: Spent 8.40s on a formula simplification. DAG size of input: 42 DAG size of output: 29 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 02:32:26,449 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 02:32:28,459 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 02:32:30,485 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 02:32:33,343 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 02:32:34,755 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 02:32:36,818 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 02:32:38,829 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 02:32:39,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:32:39,712 INFO L93 Difference]: Finished difference Result 321 states and 388 transitions. [2022-03-18 02:32:39,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 02:32:39,713 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 4 states have call successors, (11) Word has length 90 [2022-03-18 02:32:39,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:32:39,714 INFO L225 Difference]: With dead ends: 321 [2022-03-18 02:32:39,714 INFO L226 Difference]: Without dead ends: 305 [2022-03-18 02:32:39,715 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 165 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=57, Invalid=214, Unknown=1, NotChecked=0, Total=272 [2022-03-18 02:32:39,715 INFO L912 BasicCegarLoop]: 51 mSDtfsCounter, 17 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 24 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.5s IncrementalHoareTripleChecker+Time [2022-03-18 02:32:39,716 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 383 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 375 Invalid, 9 Unknown, 0 Unchecked, 21.5s Time] [2022-03-18 02:32:39,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-03-18 02:32:39,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 299. [2022-03-18 02:32:39,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 191 states have (on average 1.1413612565445026) internal successors, (218), 198 states have internal predecessors, (218), 69 states have call successors, (69), 39 states have call predecessors, (69), 38 states have return successors, (65), 61 states have call predecessors, (65), 65 states have call successors, (65) [2022-03-18 02:32:39,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 352 transitions. [2022-03-18 02:32:39,799 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 352 transitions. Word has length 90 [2022-03-18 02:32:39,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:32:39,799 INFO L478 AbstractCegarLoop]: Abstraction has 299 states and 352 transitions. [2022-03-18 02:32:39,799 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-18 02:32:39,799 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 352 transitions. [2022-03-18 02:32:39,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-18 02:32:39,800 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:32:39,801 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:32:39,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-18 02:32:40,015 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:32:40,016 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:32:40,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:32:40,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1449122399, now seen corresponding path program 7 times [2022-03-18 02:32:40,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:32:40,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1277733827] [2022-03-18 02:32:40,017 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:32:40,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1449122399, now seen corresponding path program 8 times [2022-03-18 02:32:40,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:32:40,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777866242] [2022-03-18 02:32:40,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:32:40,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:32:40,024 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:32:40,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [924460888] [2022-03-18 02:32:40,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:32:40,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:32:40,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:32:40,026 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:32:40,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-18 02:32:40,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:32:40,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:32:40,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-18 02:32:40,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:32:40,263 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 24 proven. 266 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-18 02:32:40,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:32:40,488 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 24 proven. 50 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-18 02:32:40,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:32:40,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777866242] [2022-03-18 02:32:40,488 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:32:40,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924460888] [2022-03-18 02:32:40,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924460888] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:32:40,489 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:32:40,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-18 02:32:40,489 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:32:40,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1277733827] [2022-03-18 02:32:40,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1277733827] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:32:40,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:32:40,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 02:32:40,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551360125] [2022-03-18 02:32:40,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:32:40,490 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 02:32:40,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:32:40,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 02:32:40,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-18 02:32:40,491 INFO L87 Difference]: Start difference. First operand 299 states and 352 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2022-03-18 02:32:40,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:32:40,629 INFO L93 Difference]: Finished difference Result 386 states and 447 transitions. [2022-03-18 02:32:40,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 02:32:40,629 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) Word has length 99 [2022-03-18 02:32:40,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:32:40,631 INFO L225 Difference]: With dead ends: 386 [2022-03-18 02:32:40,631 INFO L226 Difference]: Without dead ends: 363 [2022-03-18 02:32:40,632 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=183, Unknown=0, NotChecked=0, Total=306 [2022-03-18 02:32:40,632 INFO L912 BasicCegarLoop]: 49 mSDtfsCounter, 17 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:32:40,633 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 190 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:32:40,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-03-18 02:32:40,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 355. [2022-03-18 02:32:40,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 234 states have (on average 1.123931623931624) internal successors, (263), 240 states have internal predecessors, (263), 73 states have call successors, (73), 48 states have call predecessors, (73), 47 states have return successors, (69), 66 states have call predecessors, (69), 69 states have call successors, (69) [2022-03-18 02:32:40,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 405 transitions. [2022-03-18 02:32:40,703 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 405 transitions. Word has length 99 [2022-03-18 02:32:40,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:32:40,703 INFO L478 AbstractCegarLoop]: Abstraction has 355 states and 405 transitions. [2022-03-18 02:32:40,703 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2022-03-18 02:32:40,703 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 405 transitions. [2022-03-18 02:32:40,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-18 02:32:40,704 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:32:40,705 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:32:40,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-18 02:32:40,927 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,SelfDestructingSolverStorable25 [2022-03-18 02:32:40,927 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:32:40,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:32:40,928 INFO L85 PathProgramCache]: Analyzing trace with hash 340347020, now seen corresponding path program 9 times [2022-03-18 02:32:40,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:32:40,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1948997220] [2022-03-18 02:32:40,928 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:32:40,928 INFO L85 PathProgramCache]: Analyzing trace with hash 340347020, now seen corresponding path program 10 times [2022-03-18 02:32:40,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:32:40,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919407482] [2022-03-18 02:32:40,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:32:40,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:32:40,934 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:32:40,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [638039230] [2022-03-18 02:32:40,935 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:32:40,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:32:40,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:32:40,936 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:32:40,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-18 02:32:40,991 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:32:40,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:32:40,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-18 02:32:40,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:32:41,777 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 77 proven. 97 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2022-03-18 02:32:41,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:32:42,214 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 108 proven. 27 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2022-03-18 02:32:42,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:32:42,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919407482] [2022-03-18 02:32:42,214 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:32:42,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638039230] [2022-03-18 02:32:42,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638039230] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:32:42,215 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:32:42,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2022-03-18 02:32:42,215 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:32:42,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1948997220] [2022-03-18 02:32:42,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1948997220] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:32:42,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:32:42,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 02:32:42,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747591103] [2022-03-18 02:32:42,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:32:42,216 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 02:32:42,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:32:42,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 02:32:42,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-03-18 02:32:42,217 INFO L87 Difference]: Start difference. First operand 355 states and 405 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-18 02:32:42,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:32:42,934 INFO L93 Difference]: Finished difference Result 382 states and 444 transitions. [2022-03-18 02:32:42,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 02:32:42,935 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 104 [2022-03-18 02:32:42,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:32:42,936 INFO L225 Difference]: With dead ends: 382 [2022-03-18 02:32:42,936 INFO L226 Difference]: Without dead ends: 380 [2022-03-18 02:32:42,937 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 189 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2022-03-18 02:32:42,937 INFO L912 BasicCegarLoop]: 53 mSDtfsCounter, 14 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 02:32:42,937 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 429 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 02:32:42,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-03-18 02:32:43,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 364. [2022-03-18 02:32:43,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 239 states have (on average 1.1255230125523012) internal successors, (269), 245 states have internal predecessors, (269), 76 states have call successors, (76), 49 states have call predecessors, (76), 48 states have return successors, (72), 69 states have call predecessors, (72), 72 states have call successors, (72) [2022-03-18 02:32:43,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 417 transitions. [2022-03-18 02:32:43,009 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 417 transitions. Word has length 104 [2022-03-18 02:32:43,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:32:43,009 INFO L478 AbstractCegarLoop]: Abstraction has 364 states and 417 transitions. [2022-03-18 02:32:43,010 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-18 02:32:43,010 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 417 transitions. [2022-03-18 02:32:43,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-18 02:32:43,011 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:32:43,011 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:32:43,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-18 02:32:43,227 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,SelfDestructingSolverStorable26 [2022-03-18 02:32:43,227 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:32:43,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:32:43,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1041946894, now seen corresponding path program 19 times [2022-03-18 02:32:43,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:32:43,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [721068279] [2022-03-18 02:32:43,228 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:32:43,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1041946894, now seen corresponding path program 20 times [2022-03-18 02:32:43,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:32:43,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500282741] [2022-03-18 02:32:43,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:32:43,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:32:43,243 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:32:43,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1622604588] [2022-03-18 02:32:43,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:32:43,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:32:43,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:32:43,245 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:32:43,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-18 02:32:43,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:32:43,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:32:43,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-18 02:32:43,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:32:44,126 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 26 proven. 58 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-03-18 02:32:44,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:32:45,624 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 26 proven. 58 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-03-18 02:32:45,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:32:45,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500282741] [2022-03-18 02:32:45,624 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:32:45,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622604588] [2022-03-18 02:32:45,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622604588] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:32:45,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:32:45,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-03-18 02:32:45,625 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:32:45,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [721068279] [2022-03-18 02:32:45,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [721068279] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:32:45,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:32:45,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 02:32:45,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042707001] [2022-03-18 02:32:45,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:32:45,625 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 02:32:45,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:32:45,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 02:32:45,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-03-18 02:32:45,627 INFO L87 Difference]: Start difference. First operand 364 states and 417 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-18 02:32:46,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:32:46,126 INFO L93 Difference]: Finished difference Result 412 states and 478 transitions. [2022-03-18 02:32:46,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 02:32:46,127 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 104 [2022-03-18 02:32:46,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:32:46,129 INFO L225 Difference]: With dead ends: 412 [2022-03-18 02:32:46,129 INFO L226 Difference]: Without dead ends: 410 [2022-03-18 02:32:46,130 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 192 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-03-18 02:32:46,130 INFO L912 BasicCegarLoop]: 62 mSDtfsCounter, 10 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 02:32:46,130 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 478 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 02:32:46,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-03-18 02:32:46,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 394. [2022-03-18 02:32:46,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 259 states have (on average 1.1235521235521235) internal successors, (291), 265 states have internal predecessors, (291), 82 states have call successors, (82), 53 states have call predecessors, (82), 52 states have return successors, (78), 75 states have call predecessors, (78), 78 states have call successors, (78) [2022-03-18 02:32:46,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 451 transitions. [2022-03-18 02:32:46,217 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 451 transitions. Word has length 104 [2022-03-18 02:32:46,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:32:46,217 INFO L478 AbstractCegarLoop]: Abstraction has 394 states and 451 transitions. [2022-03-18 02:32:46,219 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-18 02:32:46,219 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 451 transitions. [2022-03-18 02:32:46,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-18 02:32:46,230 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:32:46,230 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:32:46,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-18 02:32:46,455 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,SelfDestructingSolverStorable27 [2022-03-18 02:32:46,455 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:32:46,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:32:46,456 INFO L85 PathProgramCache]: Analyzing trace with hash -140733238, now seen corresponding path program 21 times [2022-03-18 02:32:46,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:32:46,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1604587368] [2022-03-18 02:32:46,456 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:32:46,456 INFO L85 PathProgramCache]: Analyzing trace with hash -140733238, now seen corresponding path program 22 times [2022-03-18 02:32:46,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:32:46,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208721292] [2022-03-18 02:32:46,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:32:46,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:32:46,463 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:32:46,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1553343776] [2022-03-18 02:32:46,463 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:32:46,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:32:46,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:32:46,466 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:32:46,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-18 02:32:46,518 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:32:46,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:32:46,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-18 02:32:46,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:32:47,304 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 93 proven. 111 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-03-18 02:32:47,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:32:47,718 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 109 proven. 8 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2022-03-18 02:32:47,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:32:47,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208721292] [2022-03-18 02:32:47,718 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:32:47,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553343776] [2022-03-18 02:32:47,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553343776] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:32:47,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:32:47,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2022-03-18 02:32:47,719 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:32:47,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1604587368] [2022-03-18 02:32:47,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1604587368] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:32:47,719 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:32:47,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 02:32:47,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856358922] [2022-03-18 02:32:47,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:32:47,720 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 02:32:47,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:32:47,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 02:32:47,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-03-18 02:32:47,721 INFO L87 Difference]: Start difference. First operand 394 states and 451 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-18 02:32:48,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:32:48,448 INFO L93 Difference]: Finished difference Result 446 states and 515 transitions. [2022-03-18 02:32:48,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 02:32:48,448 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 104 [2022-03-18 02:32:48,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:32:48,450 INFO L225 Difference]: With dead ends: 446 [2022-03-18 02:32:48,450 INFO L226 Difference]: Without dead ends: 444 [2022-03-18 02:32:48,451 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 189 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-03-18 02:32:48,451 INFO L912 BasicCegarLoop]: 52 mSDtfsCounter, 15 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 02:32:48,451 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 422 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 02:32:48,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2022-03-18 02:32:48,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 398. [2022-03-18 02:32:48,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 262 states have (on average 1.1221374045801527) internal successors, (294), 268 states have internal predecessors, (294), 82 states have call successors, (82), 54 states have call predecessors, (82), 53 states have return successors, (78), 75 states have call predecessors, (78), 78 states have call successors, (78) [2022-03-18 02:32:48,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 454 transitions. [2022-03-18 02:32:48,542 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 454 transitions. Word has length 104 [2022-03-18 02:32:48,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:32:48,542 INFO L478 AbstractCegarLoop]: Abstraction has 398 states and 454 transitions. [2022-03-18 02:32:48,542 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-18 02:32:48,542 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 454 transitions. [2022-03-18 02:32:48,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-18 02:32:48,543 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:32:48,543 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:32:48,566 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-03-18 02:32:48,758 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,SelfDestructingSolverStorable28 [2022-03-18 02:32:48,759 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:32:48,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:32:48,759 INFO L85 PathProgramCache]: Analyzing trace with hash 560866636, now seen corresponding path program 23 times [2022-03-18 02:32:48,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:32:48,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1347278564] [2022-03-18 02:32:48,760 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:32:48,760 INFO L85 PathProgramCache]: Analyzing trace with hash 560866636, now seen corresponding path program 24 times [2022-03-18 02:32:48,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:32:48,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211001886] [2022-03-18 02:32:48,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:32:48,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:32:48,766 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:32:48,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1901208342] [2022-03-18 02:32:48,766 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:32:48,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:32:48,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:32:48,768 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:32:48,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-18 02:32:49,210 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-18 02:32:49,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:32:49,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-18 02:32:49,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:32:51,505 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 107 proven. 40 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-03-18 02:32:51,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:32:54,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:32:54,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211001886] [2022-03-18 02:32:54,406 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:32:54,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901208342] [2022-03-18 02:32:54,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901208342] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 02:32:54,406 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 02:32:54,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-18 02:32:54,407 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:32:54,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1347278564] [2022-03-18 02:32:54,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1347278564] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:32:54,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:32:54,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-18 02:32:54,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852529316] [2022-03-18 02:32:54,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:32:54,407 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 02:32:54,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:32:54,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 02:32:54,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2022-03-18 02:32:54,408 INFO L87 Difference]: Start difference. First operand 398 states and 454 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-18 02:32:58,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:32:58,986 INFO L93 Difference]: Finished difference Result 494 states and 594 transitions. [2022-03-18 02:32:58,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 02:32:58,987 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) Word has length 104 [2022-03-18 02:32:58,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:32:58,990 INFO L225 Difference]: With dead ends: 494 [2022-03-18 02:32:58,990 INFO L226 Difference]: Without dead ends: 488 [2022-03-18 02:32:58,990 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2022-03-18 02:32:58,995 INFO L912 BasicCegarLoop]: 54 mSDtfsCounter, 41 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:32:58,995 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 554 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-03-18 02:32:58,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2022-03-18 02:32:59,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 456. [2022-03-18 02:32:59,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 298 states have (on average 1.1342281879194631) internal successors, (338), 306 states have internal predecessors, (338), 99 states have call successors, (99), 59 states have call predecessors, (99), 58 states have return successors, (95), 90 states have call predecessors, (95), 95 states have call successors, (95) [2022-03-18 02:32:59,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 532 transitions. [2022-03-18 02:32:59,094 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 532 transitions. Word has length 104 [2022-03-18 02:32:59,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:32:59,094 INFO L478 AbstractCegarLoop]: Abstraction has 456 states and 532 transitions. [2022-03-18 02:32:59,094 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-18 02:32:59,094 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 532 transitions. [2022-03-18 02:32:59,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-18 02:32:59,095 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:32:59,095 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:32:59,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-18 02:32:59,296 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:32:59,296 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:32:59,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:32:59,296 INFO L85 PathProgramCache]: Analyzing trace with hash -152279154, now seen corresponding path program 25 times [2022-03-18 02:32:59,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:32:59,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1637983967] [2022-03-18 02:32:59,297 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:32:59,297 INFO L85 PathProgramCache]: Analyzing trace with hash -152279154, now seen corresponding path program 26 times [2022-03-18 02:32:59,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:32:59,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210893635] [2022-03-18 02:32:59,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:32:59,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:32:59,305 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:32:59,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [916880902] [2022-03-18 02:32:59,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:32:59,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:32:59,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:32:59,310 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:32:59,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-18 02:32:59,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:32:59,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:32:59,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-18 02:32:59,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:33:00,575 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 75 proven. 75 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2022-03-18 02:33:00,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:33:01,101 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 115 proven. 20 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2022-03-18 02:33:01,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:33:01,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210893635] [2022-03-18 02:33:01,101 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:33:01,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916880902] [2022-03-18 02:33:01,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916880902] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:33:01,101 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:33:01,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 18 [2022-03-18 02:33:01,102 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:33:01,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1637983967] [2022-03-18 02:33:01,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1637983967] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:33:01,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:33:01,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 02:33:01,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427502026] [2022-03-18 02:33:01,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:33:01,102 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 02:33:01,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:33:01,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 02:33:01,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-03-18 02:33:01,103 INFO L87 Difference]: Start difference. First operand 456 states and 532 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-18 02:33:01,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:33:01,916 INFO L93 Difference]: Finished difference Result 485 states and 573 transitions. [2022-03-18 02:33:01,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 02:33:01,917 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 104 [2022-03-18 02:33:01,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:33:01,919 INFO L225 Difference]: With dead ends: 485 [2022-03-18 02:33:01,919 INFO L226 Difference]: Without dead ends: 483 [2022-03-18 02:33:01,920 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 189 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2022-03-18 02:33:01,920 INFO L912 BasicCegarLoop]: 54 mSDtfsCounter, 15 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-18 02:33:01,921 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 538 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-18 02:33:01,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-03-18 02:33:02,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 456. [2022-03-18 02:33:02,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 298 states have (on average 1.1342281879194631) internal successors, (338), 306 states have internal predecessors, (338), 99 states have call successors, (99), 59 states have call predecessors, (99), 58 states have return successors, (95), 90 states have call predecessors, (95), 95 states have call successors, (95) [2022-03-18 02:33:02,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 532 transitions. [2022-03-18 02:33:02,022 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 532 transitions. Word has length 104 [2022-03-18 02:33:02,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:33:02,022 INFO L478 AbstractCegarLoop]: Abstraction has 456 states and 532 transitions. [2022-03-18 02:33:02,022 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-18 02:33:02,022 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 532 transitions. [2022-03-18 02:33:02,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-18 02:33:02,024 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:33:02,024 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:33:02,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-18 02:33:02,239 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:33:02,239 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:33:02,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:33:02,240 INFO L85 PathProgramCache]: Analyzing trace with hash 549320720, now seen corresponding path program 27 times [2022-03-18 02:33:02,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:33:02,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2121621120] [2022-03-18 02:33:02,240 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:33:02,241 INFO L85 PathProgramCache]: Analyzing trace with hash 549320720, now seen corresponding path program 28 times [2022-03-18 02:33:02,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:33:02,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665031837] [2022-03-18 02:33:02,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:33:02,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:33:02,247 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:33:02,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1946986879] [2022-03-18 02:33:02,247 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:33:02,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:33:02,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:33:02,249 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:33:02,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-18 02:33:02,300 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:33:02,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:33:02,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-18 02:33:02,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:33:05,073 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 74 proven. 100 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2022-03-18 02:33:05,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:33:05,800 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 113 proven. 32 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2022-03-18 02:33:05,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:33:05,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665031837] [2022-03-18 02:33:05,801 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:33:05,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946986879] [2022-03-18 02:33:05,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946986879] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:33:05,801 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:33:05,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 19 [2022-03-18 02:33:05,801 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:33:05,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2121621120] [2022-03-18 02:33:05,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2121621120] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:33:05,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:33:05,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 02:33:05,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492943406] [2022-03-18 02:33:05,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:33:05,802 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 02:33:05,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:33:05,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 02:33:05,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-03-18 02:33:05,803 INFO L87 Difference]: Start difference. First operand 456 states and 532 transitions. Second operand has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-18 02:33:10,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:33:10,066 INFO L93 Difference]: Finished difference Result 484 states and 569 transitions. [2022-03-18 02:33:10,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 02:33:10,067 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) Word has length 104 [2022-03-18 02:33:10,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:33:10,069 INFO L225 Difference]: With dead ends: 484 [2022-03-18 02:33:10,069 INFO L226 Difference]: Without dead ends: 482 [2022-03-18 02:33:10,069 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 188 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2022-03-18 02:33:10,070 INFO L912 BasicCegarLoop]: 53 mSDtfsCounter, 14 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:33:10,070 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 479 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-03-18 02:33:10,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2022-03-18 02:33:10,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 458. [2022-03-18 02:33:10,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 299 states have (on average 1.1337792642140467) internal successors, (339), 307 states have internal predecessors, (339), 99 states have call successors, (99), 60 states have call predecessors, (99), 59 states have return successors, (95), 90 states have call predecessors, (95), 95 states have call successors, (95) [2022-03-18 02:33:10,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 533 transitions. [2022-03-18 02:33:10,181 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 533 transitions. Word has length 104 [2022-03-18 02:33:10,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:33:10,181 INFO L478 AbstractCegarLoop]: Abstraction has 458 states and 533 transitions. [2022-03-18 02:33:10,182 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-18 02:33:10,182 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 533 transitions. [2022-03-18 02:33:10,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-18 02:33:10,183 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:33:10,183 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:33:10,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-18 02:33:10,384 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,SelfDestructingSolverStorable31 [2022-03-18 02:33:10,384 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:33:10,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:33:10,385 INFO L85 PathProgramCache]: Analyzing trace with hash -633359412, now seen corresponding path program 29 times [2022-03-18 02:33:10,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:33:10,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1376264014] [2022-03-18 02:33:10,385 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:33:10,385 INFO L85 PathProgramCache]: Analyzing trace with hash -633359412, now seen corresponding path program 30 times [2022-03-18 02:33:10,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:33:10,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878392859] [2022-03-18 02:33:10,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:33:10,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:33:10,392 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:33:10,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1200206178] [2022-03-18 02:33:10,393 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:33:10,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:33:10,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:33:10,395 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:33:10,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-18 02:33:10,913 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 02:33:10,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:33:10,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-18 02:33:10,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:33:11,803 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 58 proven. 41 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2022-03-18 02:33:11,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:33:18,147 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 62 proven. 25 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2022-03-18 02:33:18,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:33:18,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878392859] [2022-03-18 02:33:18,148 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:33:18,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200206178] [2022-03-18 02:33:18,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200206178] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:33:18,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:33:18,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 18 [2022-03-18 02:33:18,148 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:33:18,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1376264014] [2022-03-18 02:33:18,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1376264014] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:33:18,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:33:18,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-18 02:33:18,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835484523] [2022-03-18 02:33:18,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:33:18,149 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 02:33:18,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:33:18,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 02:33:18,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=248, Unknown=2, NotChecked=0, Total=306 [2022-03-18 02:33:18,150 INFO L87 Difference]: Start difference. First operand 458 states and 533 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2022-03-18 02:33:19,771 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 02:33:20,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:33:20,723 INFO L93 Difference]: Finished difference Result 537 states and 644 transitions. [2022-03-18 02:33:20,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-18 02:33:20,724 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) Word has length 104 [2022-03-18 02:33:20,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:33:20,726 INFO L225 Difference]: With dead ends: 537 [2022-03-18 02:33:20,726 INFO L226 Difference]: Without dead ends: 535 [2022-03-18 02:33:20,726 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 189 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=73, Invalid=345, Unknown=2, NotChecked=0, Total=420 [2022-03-18 02:33:20,727 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 40 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-18 02:33:20,727 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 293 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-18 02:33:20,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-03-18 02:33:20,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 481. [2022-03-18 02:33:20,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 312 states have (on average 1.1314102564102564) internal successors, (353), 323 states have internal predecessors, (353), 106 states have call successors, (106), 63 states have call predecessors, (106), 62 states have return successors, (102), 94 states have call predecessors, (102), 102 states have call successors, (102) [2022-03-18 02:33:20,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 561 transitions. [2022-03-18 02:33:20,862 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 561 transitions. Word has length 104 [2022-03-18 02:33:20,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:33:20,863 INFO L478 AbstractCegarLoop]: Abstraction has 481 states and 561 transitions. [2022-03-18 02:33:20,863 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2022-03-18 02:33:20,863 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 561 transitions. [2022-03-18 02:33:20,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-03-18 02:33:20,864 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:33:20,864 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:33:20,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-18 02:33:21,064 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:33:21,065 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:33:21,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:33:21,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1283404789, now seen corresponding path program 31 times [2022-03-18 02:33:21,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:33:21,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1313873945] [2022-03-18 02:33:21,066 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:33:21,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1283404789, now seen corresponding path program 32 times [2022-03-18 02:33:21,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:33:21,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067772752] [2022-03-18 02:33:21,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:33:21,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:33:21,074 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:33:21,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1475030604] [2022-03-18 02:33:21,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:33:21,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:33:21,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:33:21,076 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:33:21,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-18 02:33:21,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:33:21,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:33:21,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-18 02:33:21,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:33:21,642 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 28 proven. 62 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2022-03-18 02:33:21,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:33:21,977 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 28 proven. 62 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2022-03-18 02:33:21,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:33:21,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067772752] [2022-03-18 02:33:21,977 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:33:21,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475030604] [2022-03-18 02:33:21,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475030604] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:33:21,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:33:21,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-03-18 02:33:21,978 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:33:21,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1313873945] [2022-03-18 02:33:21,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1313873945] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:33:21,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:33:21,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 02:33:21,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447146711] [2022-03-18 02:33:21,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:33:21,978 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 02:33:21,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:33:21,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 02:33:21,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-03-18 02:33:21,979 INFO L87 Difference]: Start difference. First operand 481 states and 561 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 6 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-18 02:33:22,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:33:22,282 INFO L93 Difference]: Finished difference Result 507 states and 602 transitions. [2022-03-18 02:33:22,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 02:33:22,283 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 6 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 109 [2022-03-18 02:33:22,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:33:22,285 INFO L225 Difference]: With dead ends: 507 [2022-03-18 02:33:22,285 INFO L226 Difference]: Without dead ends: 501 [2022-03-18 02:33:22,285 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 204 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-03-18 02:33:22,285 INFO L912 BasicCegarLoop]: 63 mSDtfsCounter, 9 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 02:33:22,286 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 431 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 02:33:22,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-03-18 02:33:22,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 475. [2022-03-18 02:33:22,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 309 states have (on average 1.132686084142395) internal successors, (350), 319 states have internal predecessors, (350), 104 states have call successors, (104), 62 states have call predecessors, (104), 61 states have return successors, (100), 93 states have call predecessors, (100), 100 states have call successors, (100) [2022-03-18 02:33:22,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 554 transitions. [2022-03-18 02:33:22,407 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 554 transitions. Word has length 109 [2022-03-18 02:33:22,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:33:22,408 INFO L478 AbstractCegarLoop]: Abstraction has 475 states and 554 transitions. [2022-03-18 02:33:22,408 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 6 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-18 02:33:22,408 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 554 transitions. [2022-03-18 02:33:22,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-03-18 02:33:22,409 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:33:22,409 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:33:22,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-18 02:33:22,609 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:33:22,609 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:33:22,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:33:22,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1677771575, now seen corresponding path program 33 times [2022-03-18 02:33:22,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:33:22,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [463278393] [2022-03-18 02:33:22,610 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:33:22,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1677771575, now seen corresponding path program 34 times [2022-03-18 02:33:22,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:33:22,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701663413] [2022-03-18 02:33:22,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:33:22,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:33:22,616 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:33:22,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [221180750] [2022-03-18 02:33:22,617 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:33:22,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:33:22,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:33:22,628 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:33:22,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-18 02:33:22,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:33:22,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:33:22,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-18 02:33:22,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:33:23,493 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 30 proven. 99 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2022-03-18 02:33:23,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:33:26,607 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 34 proven. 95 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2022-03-18 02:33:26,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:33:26,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701663413] [2022-03-18 02:33:26,608 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:33:26,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221180750] [2022-03-18 02:33:26,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221180750] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:33:26,608 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:33:26,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2022-03-18 02:33:26,608 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:33:26,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [463278393] [2022-03-18 02:33:26,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [463278393] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:33:26,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:33:26,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 02:33:26,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978820351] [2022-03-18 02:33:26,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:33:26,609 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 02:33:26,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:33:26,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 02:33:26,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-03-18 02:33:26,609 INFO L87 Difference]: Start difference. First operand 475 states and 554 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-18 02:33:27,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:33:27,983 INFO L93 Difference]: Finished difference Result 511 states and 604 transitions. [2022-03-18 02:33:27,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 02:33:27,984 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 109 [2022-03-18 02:33:27,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:33:27,986 INFO L225 Difference]: With dead ends: 511 [2022-03-18 02:33:27,986 INFO L226 Difference]: Without dead ends: 505 [2022-03-18 02:33:27,986 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 198 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-03-18 02:33:27,986 INFO L912 BasicCegarLoop]: 51 mSDtfsCounter, 16 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-18 02:33:27,987 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 417 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-18 02:33:27,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-03-18 02:33:28,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 485. [2022-03-18 02:33:28,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 317 states have (on average 1.1324921135646688) internal successors, (359), 326 states have internal predecessors, (359), 104 states have call successors, (104), 64 states have call predecessors, (104), 63 states have return successors, (100), 94 states have call predecessors, (100), 100 states have call successors, (100) [2022-03-18 02:33:28,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 563 transitions. [2022-03-18 02:33:28,106 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 563 transitions. Word has length 109 [2022-03-18 02:33:28,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:33:28,107 INFO L478 AbstractCegarLoop]: Abstraction has 485 states and 563 transitions. [2022-03-18 02:33:28,107 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-18 02:33:28,107 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 563 transitions. [2022-03-18 02:33:28,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-03-18 02:33:28,108 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:33:28,108 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:33:28,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-18 02:33:28,308 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,SelfDestructingSolverStorable34 [2022-03-18 02:33:28,309 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:33:28,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:33:28,309 INFO L85 PathProgramCache]: Analyzing trace with hash 103380621, now seen corresponding path program 35 times [2022-03-18 02:33:28,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:33:28,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [245866572] [2022-03-18 02:33:28,309 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:33:28,309 INFO L85 PathProgramCache]: Analyzing trace with hash 103380621, now seen corresponding path program 36 times [2022-03-18 02:33:28,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:33:28,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930077203] [2022-03-18 02:33:28,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:33:28,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:33:28,316 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:33:28,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1730218801] [2022-03-18 02:33:28,317 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:33:28,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:33:28,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:33:28,324 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:33:28,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-18 02:33:29,073 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 02:33:29,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:33:29,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-18 02:33:29,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:33:29,364 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 121 proven. 5 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2022-03-18 02:33:29,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:33:29,632 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 121 proven. 5 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2022-03-18 02:33:29,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:33:29,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930077203] [2022-03-18 02:33:29,633 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:33:29,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730218801] [2022-03-18 02:33:29,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730218801] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:33:29,633 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:33:29,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 15 [2022-03-18 02:33:29,633 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:33:29,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [245866572] [2022-03-18 02:33:29,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [245866572] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:33:29,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:33:29,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 02:33:29,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188812104] [2022-03-18 02:33:29,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:33:29,634 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 02:33:29,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:33:29,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 02:33:29,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-03-18 02:33:29,634 INFO L87 Difference]: Start difference. First operand 485 states and 563 transitions. Second operand has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-18 02:33:29,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:33:29,931 INFO L93 Difference]: Finished difference Result 495 states and 571 transitions. [2022-03-18 02:33:29,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 02:33:29,931 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 109 [2022-03-18 02:33:29,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:33:29,933 INFO L225 Difference]: With dead ends: 495 [2022-03-18 02:33:29,933 INFO L226 Difference]: Without dead ends: 474 [2022-03-18 02:33:29,934 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 201 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-03-18 02:33:29,934 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 21 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:33:29,934 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 154 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:33:29,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2022-03-18 02:33:30,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 468. [2022-03-18 02:33:30,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 312 states have (on average 1.1217948717948718) internal successors, (350), 319 states have internal predecessors, (350), 93 states have call successors, (93), 63 states have call predecessors, (93), 62 states have return successors, (90), 85 states have call predecessors, (90), 90 states have call successors, (90) [2022-03-18 02:33:30,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 533 transitions. [2022-03-18 02:33:30,090 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 533 transitions. Word has length 109 [2022-03-18 02:33:30,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:33:30,090 INFO L478 AbstractCegarLoop]: Abstraction has 468 states and 533 transitions. [2022-03-18 02:33:30,090 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-18 02:33:30,090 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 533 transitions. [2022-03-18 02:33:30,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-03-18 02:33:30,091 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:33:30,091 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:33:30,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-18 02:33:30,292 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,SelfDestructingSolverStorable35 [2022-03-18 02:33:30,292 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:33:30,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:33:30,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1511605586, now seen corresponding path program 9 times [2022-03-18 02:33:30,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:33:30,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [778618614] [2022-03-18 02:33:30,293 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:33:30,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1511605586, now seen corresponding path program 10 times [2022-03-18 02:33:30,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:33:30,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783567778] [2022-03-18 02:33:30,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:33:30,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:33:30,299 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:33:30,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [499143774] [2022-03-18 02:33:30,300 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:33:30,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:33:30,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:33:30,304 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:33:30,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-18 02:33:30,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:33:30,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:33:30,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-18 02:33:30,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:33:30,557 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 30 proven. 440 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-18 02:33:30,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:33:30,768 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 30 proven. 80 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2022-03-18 02:33:30,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:33:30,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783567778] [2022-03-18 02:33:30,769 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:33:30,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499143774] [2022-03-18 02:33:30,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499143774] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:33:30,769 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:33:30,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-03-18 02:33:30,769 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:33:30,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [778618614] [2022-03-18 02:33:30,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [778618614] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:33:30,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:33:30,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 02:33:30,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538595159] [2022-03-18 02:33:30,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:33:30,770 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 02:33:30,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:33:30,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 02:33:30,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-03-18 02:33:30,771 INFO L87 Difference]: Start difference. First operand 468 states and 533 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (20), 8 states have call predecessors, (20), 6 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-18 02:33:31,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:33:31,030 INFO L93 Difference]: Finished difference Result 583 states and 668 transitions. [2022-03-18 02:33:31,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-18 02:33:31,031 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (20), 8 states have call predecessors, (20), 6 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) Word has length 118 [2022-03-18 02:33:31,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:33:31,034 INFO L225 Difference]: With dead ends: 583 [2022-03-18 02:33:31,034 INFO L226 Difference]: Without dead ends: 574 [2022-03-18 02:33:31,035 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=249, Unknown=0, NotChecked=0, Total=420 [2022-03-18 02:33:31,035 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 26 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:33:31,036 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 162 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:33:31,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2022-03-18 02:33:31,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 561. [2022-03-18 02:33:31,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 377 states have (on average 1.1087533156498675) internal successors, (418), 385 states have internal predecessors, (418), 108 states have call successors, (108), 76 states have call predecessors, (108), 75 states have return successors, (105), 99 states have call predecessors, (105), 105 states have call successors, (105) [2022-03-18 02:33:31,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 631 transitions. [2022-03-18 02:33:31,238 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 631 transitions. Word has length 118 [2022-03-18 02:33:31,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:33:31,239 INFO L478 AbstractCegarLoop]: Abstraction has 561 states and 631 transitions. [2022-03-18 02:33:31,239 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (20), 8 states have call predecessors, (20), 6 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-18 02:33:31,239 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 631 transitions. [2022-03-18 02:33:31,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-03-18 02:33:31,241 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:33:31,241 INFO L500 BasicCegarLoop]: trace histogram [19, 18, 18, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:33:31,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-18 02:33:31,463 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-18 02:33:31,463 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:33:31,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:33:31,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1126498815, now seen corresponding path program 11 times [2022-03-18 02:33:31,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:33:31,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1681833054] [2022-03-18 02:33:31,464 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:33:31,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1126498815, now seen corresponding path program 12 times [2022-03-18 02:33:31,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:33:31,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429342311] [2022-03-18 02:33:31,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:33:31,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:33:31,475 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:33:31,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1244438877] [2022-03-18 02:33:31,475 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:33:31,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:33:31,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:33:31,484 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:33:31,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-18 02:33:31,553 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-03-18 02:33:31,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:33:31,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-18 02:33:31,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:33:31,778 INFO L134 CoverageAnalysis]: Checked inductivity of 769 backedges. 36 proven. 657 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-03-18 02:33:31,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:33:32,082 INFO L134 CoverageAnalysis]: Checked inductivity of 769 backedges. 36 proven. 117 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-03-18 02:33:32,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:33:32,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429342311] [2022-03-18 02:33:32,083 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:33:32,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244438877] [2022-03-18 02:33:32,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244438877] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:33:32,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:33:32,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-03-18 02:33:32,084 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:33:32,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1681833054] [2022-03-18 02:33:32,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1681833054] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:33:32,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:33:32,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 02:33:32,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019405266] [2022-03-18 02:33:32,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:33:32,084 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 02:33:32,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:33:32,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 02:33:32,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-03-18 02:33:32,085 INFO L87 Difference]: Start difference. First operand 561 states and 631 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (23), 9 states have call predecessors, (23), 7 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-18 02:33:32,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:33:32,419 INFO L93 Difference]: Finished difference Result 690 states and 792 transitions. [2022-03-18 02:33:32,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 02:33:32,419 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (23), 9 states have call predecessors, (23), 7 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) Word has length 137 [2022-03-18 02:33:32,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:33:32,422 INFO L225 Difference]: With dead ends: 690 [2022-03-18 02:33:32,422 INFO L226 Difference]: Without dead ends: 681 [2022-03-18 02:33:32,423 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=227, Invalid=325, Unknown=0, NotChecked=0, Total=552 [2022-03-18 02:33:32,423 INFO L912 BasicCegarLoop]: 50 mSDtfsCounter, 24 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:33:32,423 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 154 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:33:32,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2022-03-18 02:33:32,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 679. [2022-03-18 02:33:32,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 453 states have (on average 1.1059602649006623) internal successors, (501), 464 states have internal predecessors, (501), 136 states have call successors, (136), 90 states have call predecessors, (136), 89 states have return successors, (133), 124 states have call predecessors, (133), 133 states have call successors, (133) [2022-03-18 02:33:32,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 770 transitions. [2022-03-18 02:33:32,610 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 770 transitions. Word has length 137 [2022-03-18 02:33:32,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:33:32,611 INFO L478 AbstractCegarLoop]: Abstraction has 679 states and 770 transitions. [2022-03-18 02:33:32,611 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (23), 9 states have call predecessors, (23), 7 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-18 02:33:32,611 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 770 transitions. [2022-03-18 02:33:32,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-03-18 02:33:32,613 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:33:32,613 INFO L500 BasicCegarLoop]: trace histogram [22, 21, 21, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:33:32,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-18 02:33:32,838 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:33:32,838 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:33:32,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:33:32,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1647300850, now seen corresponding path program 13 times [2022-03-18 02:33:32,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:33:32,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1039924391] [2022-03-18 02:33:32,839 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:33:32,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1647300850, now seen corresponding path program 14 times [2022-03-18 02:33:32,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:33:32,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086034919] [2022-03-18 02:33:32,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:33:32,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:33:32,851 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:33:32,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [315152852] [2022-03-18 02:33:32,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:33:32,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:33:32,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:33:32,853 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:33:32,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-18 02:33:32,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:33:32,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:33:32,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-18 02:33:32,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:33:33,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1047 backedges. 42 proven. 917 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-18 02:33:33,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:33:33,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1047 backedges. 42 proven. 161 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2022-03-18 02:33:33,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:33:33,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086034919] [2022-03-18 02:33:33,531 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:33:33,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315152852] [2022-03-18 02:33:33,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315152852] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:33:33,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:33:33,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-03-18 02:33:33,532 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:33:33,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1039924391] [2022-03-18 02:33:33,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1039924391] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:33:33,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:33:33,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 02:33:33,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990521788] [2022-03-18 02:33:33,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:33:33,532 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 02:33:33,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:33:33,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 02:33:33,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-03-18 02:33:33,533 INFO L87 Difference]: Start difference. First operand 679 states and 770 transitions. Second operand has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (26), 10 states have call predecessors, (26), 8 states have return successors, (24), 8 states have call predecessors, (24), 9 states have call successors, (24) [2022-03-18 02:33:33,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:33:33,911 INFO L93 Difference]: Finished difference Result 808 states and 931 transitions. [2022-03-18 02:33:33,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-18 02:33:33,912 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (26), 10 states have call predecessors, (26), 8 states have return successors, (24), 8 states have call predecessors, (24), 9 states have call successors, (24) Word has length 156 [2022-03-18 02:33:33,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:33:33,917 INFO L225 Difference]: With dead ends: 808 [2022-03-18 02:33:33,917 INFO L226 Difference]: Without dead ends: 799 [2022-03-18 02:33:33,918 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=291, Invalid=411, Unknown=0, NotChecked=0, Total=702 [2022-03-18 02:33:33,918 INFO L912 BasicCegarLoop]: 53 mSDtfsCounter, 29 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:33:33,920 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 196 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:33:33,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2022-03-18 02:33:34,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 797. [2022-03-18 02:33:34,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 797 states, 529 states have (on average 1.1039697542533082) internal successors, (584), 543 states have internal predecessors, (584), 164 states have call successors, (164), 104 states have call predecessors, (164), 103 states have return successors, (161), 149 states have call predecessors, (161), 161 states have call successors, (161) [2022-03-18 02:33:34,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 797 states to 797 states and 909 transitions. [2022-03-18 02:33:34,166 INFO L78 Accepts]: Start accepts. Automaton has 797 states and 909 transitions. Word has length 156 [2022-03-18 02:33:34,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:33:34,166 INFO L478 AbstractCegarLoop]: Abstraction has 797 states and 909 transitions. [2022-03-18 02:33:34,166 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (26), 10 states have call predecessors, (26), 8 states have return successors, (24), 8 states have call predecessors, (24), 9 states have call successors, (24) [2022-03-18 02:33:34,167 INFO L276 IsEmpty]: Start isEmpty. Operand 797 states and 909 transitions. [2022-03-18 02:33:34,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-03-18 02:33:34,169 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:33:34,169 INFO L500 BasicCegarLoop]: trace histogram [25, 24, 24, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:33:34,189 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-03-18 02:33:34,379 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-18 02:33:34,379 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:33:34,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:33:34,380 INFO L85 PathProgramCache]: Analyzing trace with hash -980382111, now seen corresponding path program 15 times [2022-03-18 02:33:34,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:33:34,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [495150412] [2022-03-18 02:33:34,380 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:33:34,380 INFO L85 PathProgramCache]: Analyzing trace with hash -980382111, now seen corresponding path program 16 times [2022-03-18 02:33:34,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:33:34,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513373001] [2022-03-18 02:33:34,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:33:34,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:33:34,392 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:33:34,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [739635549] [2022-03-18 02:33:34,392 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:33:34,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:33:34,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:33:34,394 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:33:34,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-18 02:33:34,472 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:33:34,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:33:34,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-18 02:33:34,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:33:34,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 48 proven. 1220 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-03-18 02:33:34,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:33:35,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 48 proven. 212 refuted. 0 times theorem prover too weak. 1108 trivial. 0 not checked. [2022-03-18 02:33:35,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:33:35,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513373001] [2022-03-18 02:33:35,094 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:33:35,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739635549] [2022-03-18 02:33:35,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739635549] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:33:35,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:33:35,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-03-18 02:33:35,094 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:33:35,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [495150412] [2022-03-18 02:33:35,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [495150412] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:33:35,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:33:35,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 02:33:35,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115634805] [2022-03-18 02:33:35,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:33:35,095 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 02:33:35,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:33:35,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 02:33:35,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-03-18 02:33:35,096 INFO L87 Difference]: Start difference. First operand 797 states and 909 transitions. Second operand has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (29), 11 states have call predecessors, (29), 9 states have return successors, (27), 9 states have call predecessors, (27), 10 states have call successors, (27) [2022-03-18 02:33:35,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:33:35,515 INFO L93 Difference]: Finished difference Result 926 states and 1070 transitions. [2022-03-18 02:33:35,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-18 02:33:35,516 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (29), 11 states have call predecessors, (29), 9 states have return successors, (27), 9 states have call predecessors, (27), 10 states have call successors, (27) Word has length 175 [2022-03-18 02:33:35,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:33:35,519 INFO L225 Difference]: With dead ends: 926 [2022-03-18 02:33:35,519 INFO L226 Difference]: Without dead ends: 917 [2022-03-18 02:33:35,519 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=363, Invalid=507, Unknown=0, NotChecked=0, Total=870 [2022-03-18 02:33:35,520 INFO L912 BasicCegarLoop]: 56 mSDtfsCounter, 31 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:33:35,521 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 218 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:33:35,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2022-03-18 02:33:35,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 915. [2022-03-18 02:33:35,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 605 states have (on average 1.1024793388429752) internal successors, (667), 622 states have internal predecessors, (667), 192 states have call successors, (192), 118 states have call predecessors, (192), 117 states have return successors, (189), 174 states have call predecessors, (189), 189 states have call successors, (189) [2022-03-18 02:33:35,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 1048 transitions. [2022-03-18 02:33:35,768 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 1048 transitions. Word has length 175 [2022-03-18 02:33:35,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:33:35,769 INFO L478 AbstractCegarLoop]: Abstraction has 915 states and 1048 transitions. [2022-03-18 02:33:35,769 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (29), 11 states have call predecessors, (29), 9 states have return successors, (27), 9 states have call predecessors, (27), 10 states have call successors, (27) [2022-03-18 02:33:35,769 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 1048 transitions. [2022-03-18 02:33:35,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-03-18 02:33:35,772 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:33:35,772 INFO L500 BasicCegarLoop]: trace histogram [28, 27, 27, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:33:35,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-18 02:33:35,983 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-18 02:33:35,983 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:33:35,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:33:35,984 INFO L85 PathProgramCache]: Analyzing trace with hash -794778478, now seen corresponding path program 17 times [2022-03-18 02:33:35,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:33:35,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1264179402] [2022-03-18 02:33:35,984 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:33:35,984 INFO L85 PathProgramCache]: Analyzing trace with hash -794778478, now seen corresponding path program 18 times [2022-03-18 02:33:35,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:33:35,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397449344] [2022-03-18 02:33:35,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:33:35,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:33:35,991 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:33:35,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1197938433] [2022-03-18 02:33:35,992 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:33:35,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:33:35,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:33:35,994 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:33:35,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-18 02:33:36,140 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-03-18 02:33:36,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:33:36,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-18 02:33:36,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:33:36,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1732 backedges. 54 proven. 1566 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-18 02:33:36,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:33:36,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1732 backedges. 54 proven. 270 refuted. 0 times theorem prover too weak. 1408 trivial. 0 not checked. [2022-03-18 02:33:36,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:33:36,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397449344] [2022-03-18 02:33:36,850 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:33:36,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197938433] [2022-03-18 02:33:36,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197938433] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:33:36,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:33:36,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-03-18 02:33:36,851 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:33:36,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1264179402] [2022-03-18 02:33:36,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1264179402] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:33:36,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:33:36,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 02:33:36,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751260453] [2022-03-18 02:33:36,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:33:36,851 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 02:33:36,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:33:36,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 02:33:36,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-18 02:33:36,852 INFO L87 Difference]: Start difference. First operand 915 states and 1048 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (32), 12 states have call predecessors, (32), 10 states have return successors, (30), 10 states have call predecessors, (30), 11 states have call successors, (30) [2022-03-18 02:33:37,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:33:37,387 INFO L93 Difference]: Finished difference Result 1044 states and 1209 transitions. [2022-03-18 02:33:37,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-18 02:33:37,387 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (32), 12 states have call predecessors, (32), 10 states have return successors, (30), 10 states have call predecessors, (30), 11 states have call successors, (30) Word has length 194 [2022-03-18 02:33:37,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:33:37,392 INFO L225 Difference]: With dead ends: 1044 [2022-03-18 02:33:37,392 INFO L226 Difference]: Without dead ends: 1035 [2022-03-18 02:33:37,393 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 365 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=443, Invalid=613, Unknown=0, NotChecked=0, Total=1056 [2022-03-18 02:33:37,394 INFO L912 BasicCegarLoop]: 59 mSDtfsCounter, 55 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:33:37,394 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 200 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:33:37,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2022-03-18 02:33:37,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 1033. [2022-03-18 02:33:37,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 681 states have (on average 1.1013215859030836) internal successors, (750), 701 states have internal predecessors, (750), 220 states have call successors, (220), 132 states have call predecessors, (220), 131 states have return successors, (217), 199 states have call predecessors, (217), 217 states have call successors, (217) [2022-03-18 02:33:37,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 1187 transitions. [2022-03-18 02:33:37,781 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 1187 transitions. Word has length 194 [2022-03-18 02:33:37,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:33:37,782 INFO L478 AbstractCegarLoop]: Abstraction has 1033 states and 1187 transitions. [2022-03-18 02:33:37,782 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (32), 12 states have call predecessors, (32), 10 states have return successors, (30), 10 states have call predecessors, (30), 11 states have call successors, (30) [2022-03-18 02:33:37,782 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 1187 transitions. [2022-03-18 02:33:37,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-03-18 02:33:37,785 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:33:37,785 INFO L500 BasicCegarLoop]: trace histogram [31, 30, 30, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:33:37,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-03-18 02:33:37,991 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:33:37,993 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:33:37,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:33:37,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1980311871, now seen corresponding path program 19 times [2022-03-18 02:33:37,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:33:37,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1327024025] [2022-03-18 02:33:37,994 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:33:37,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1980311871, now seen corresponding path program 20 times [2022-03-18 02:33:37,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:33:37,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632818531] [2022-03-18 02:33:37,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:33:37,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:33:38,003 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:33:38,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [921248859] [2022-03-18 02:33:38,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:33:38,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:33:38,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:33:38,005 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:33:38,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-18 02:33:38,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:33:38,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:33:38,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-18 02:33:38,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:33:38,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2139 backedges. 60 proven. 1955 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-03-18 02:33:38,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:33:38,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2139 backedges. 60 proven. 335 refuted. 0 times theorem prover too weak. 1744 trivial. 0 not checked. [2022-03-18 02:33:38,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:33:38,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632818531] [2022-03-18 02:33:38,951 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:33:38,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921248859] [2022-03-18 02:33:38,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921248859] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:33:38,951 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:33:38,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-03-18 02:33:38,952 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:33:38,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1327024025] [2022-03-18 02:33:38,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1327024025] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:33:38,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:33:38,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-18 02:33:38,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98362220] [2022-03-18 02:33:38,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:33:38,952 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 02:33:38,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:33:38,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 02:33:38,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-03-18 02:33:38,956 INFO L87 Difference]: Start difference. First operand 1033 states and 1187 transitions. Second operand has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 13 states have call successors, (35), 13 states have call predecessors, (35), 11 states have return successors, (33), 11 states have call predecessors, (33), 12 states have call successors, (33) [2022-03-18 02:33:39,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:33:39,473 INFO L93 Difference]: Finished difference Result 1162 states and 1348 transitions. [2022-03-18 02:33:39,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-18 02:33:39,474 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 13 states have call successors, (35), 13 states have call predecessors, (35), 11 states have return successors, (33), 11 states have call predecessors, (33), 12 states have call successors, (33) Word has length 213 [2022-03-18 02:33:39,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:33:39,478 INFO L225 Difference]: With dead ends: 1162 [2022-03-18 02:33:39,478 INFO L226 Difference]: Without dead ends: 1153 [2022-03-18 02:33:39,478 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 401 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=531, Invalid=729, Unknown=0, NotChecked=0, Total=1260 [2022-03-18 02:33:39,479 INFO L912 BasicCegarLoop]: 62 mSDtfsCounter, 40 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:33:39,479 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 212 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:33:39,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2022-03-18 02:33:39,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 1151. [2022-03-18 02:33:39,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1151 states, 757 states have (on average 1.1003963011889035) internal successors, (833), 780 states have internal predecessors, (833), 248 states have call successors, (248), 146 states have call predecessors, (248), 145 states have return successors, (245), 224 states have call predecessors, (245), 245 states have call successors, (245) [2022-03-18 02:33:39,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1151 states to 1151 states and 1326 transitions. [2022-03-18 02:33:39,783 INFO L78 Accepts]: Start accepts. Automaton has 1151 states and 1326 transitions. Word has length 213 [2022-03-18 02:33:39,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:33:39,784 INFO L478 AbstractCegarLoop]: Abstraction has 1151 states and 1326 transitions. [2022-03-18 02:33:39,784 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 13 states have call successors, (35), 13 states have call predecessors, (35), 11 states have return successors, (33), 11 states have call predecessors, (33), 12 states have call successors, (33) [2022-03-18 02:33:39,784 INFO L276 IsEmpty]: Start isEmpty. Operand 1151 states and 1326 transitions. [2022-03-18 02:33:39,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-03-18 02:33:39,788 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:33:39,788 INFO L500 BasicCegarLoop]: trace histogram [34, 33, 33, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:33:39,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-03-18 02:33:40,003 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-03-18 02:33:40,003 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:33:40,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:33:40,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1467334706, now seen corresponding path program 21 times [2022-03-18 02:33:40,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:33:40,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1899646331] [2022-03-18 02:33:40,004 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:33:40,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1467334706, now seen corresponding path program 22 times [2022-03-18 02:33:40,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:33:40,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373235273] [2022-03-18 02:33:40,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:33:40,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:33:40,013 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:33:40,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1241760377] [2022-03-18 02:33:40,014 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:33:40,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:33:40,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:33:40,015 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:33:40,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-18 02:33:40,105 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:33:40,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:33:40,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-18 02:33:40,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:33:40,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2589 backedges. 66 proven. 2387 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-03-18 02:33:40,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:33:40,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2589 backedges. 66 proven. 407 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2022-03-18 02:33:40,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:33:40,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373235273] [2022-03-18 02:33:40,980 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:33:40,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241760377] [2022-03-18 02:33:40,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241760377] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:33:40,980 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:33:40,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-03-18 02:33:40,981 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:33:40,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1899646331] [2022-03-18 02:33:40,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1899646331] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:33:40,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:33:40,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-18 02:33:40,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174154160] [2022-03-18 02:33:40,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:33:40,981 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-18 02:33:40,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:33:40,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-18 02:33:40,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-03-18 02:33:40,982 INFO L87 Difference]: Start difference. First operand 1151 states and 1326 transitions. Second operand has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 14 states have internal predecessors, (89), 14 states have call successors, (38), 14 states have call predecessors, (38), 12 states have return successors, (36), 12 states have call predecessors, (36), 13 states have call successors, (36) [2022-03-18 02:33:41,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:33:41,572 INFO L93 Difference]: Finished difference Result 1280 states and 1487 transitions. [2022-03-18 02:33:41,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-18 02:33:41,573 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 14 states have internal predecessors, (89), 14 states have call successors, (38), 14 states have call predecessors, (38), 12 states have return successors, (36), 12 states have call predecessors, (36), 13 states have call successors, (36) Word has length 232 [2022-03-18 02:33:41,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:33:41,578 INFO L225 Difference]: With dead ends: 1280 [2022-03-18 02:33:41,578 INFO L226 Difference]: Without dead ends: 1271 [2022-03-18 02:33:41,579 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 437 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=627, Invalid=855, Unknown=0, NotChecked=0, Total=1482 [2022-03-18 02:33:41,581 INFO L912 BasicCegarLoop]: 65 mSDtfsCounter, 34 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 02:33:41,581 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 234 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 02:33:41,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1271 states. [2022-03-18 02:33:42,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1271 to 1269. [2022-03-18 02:33:42,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1269 states, 833 states have (on average 1.099639855942377) internal successors, (916), 859 states have internal predecessors, (916), 276 states have call successors, (276), 160 states have call predecessors, (276), 159 states have return successors, (273), 249 states have call predecessors, (273), 273 states have call successors, (273) [2022-03-18 02:33:42,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1269 states to 1269 states and 1465 transitions. [2022-03-18 02:33:42,085 INFO L78 Accepts]: Start accepts. Automaton has 1269 states and 1465 transitions. Word has length 232 [2022-03-18 02:33:42,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:33:42,085 INFO L478 AbstractCegarLoop]: Abstraction has 1269 states and 1465 transitions. [2022-03-18 02:33:42,085 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 14 states have internal predecessors, (89), 14 states have call successors, (38), 14 states have call predecessors, (38), 12 states have return successors, (36), 12 states have call predecessors, (36), 13 states have call successors, (36) [2022-03-18 02:33:42,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1269 states and 1465 transitions. [2022-03-18 02:33:42,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-03-18 02:33:42,090 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:33:42,090 INFO L500 BasicCegarLoop]: trace histogram [37, 36, 36, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:33:42,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-18 02:33:42,315 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:33:42,315 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:33:42,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:33:42,316 INFO L85 PathProgramCache]: Analyzing trace with hash 2009323297, now seen corresponding path program 23 times [2022-03-18 02:33:42,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:33:42,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [202562999] [2022-03-18 02:33:42,316 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:33:42,316 INFO L85 PathProgramCache]: Analyzing trace with hash 2009323297, now seen corresponding path program 24 times [2022-03-18 02:33:42,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:33:42,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112628527] [2022-03-18 02:33:42,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:33:42,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:33:42,324 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:33:42,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [236640426] [2022-03-18 02:33:42,324 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:33:42,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:33:42,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:33:42,326 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:33:42,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-18 02:33:42,455 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-03-18 02:33:42,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:33:42,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-18 02:33:42,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:33:42,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3082 backedges. 72 proven. 2862 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-03-18 02:33:42,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:33:43,429 INFO L134 CoverageAnalysis]: Checked inductivity of 3082 backedges. 72 proven. 486 refuted. 0 times theorem prover too weak. 2524 trivial. 0 not checked. [2022-03-18 02:33:43,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:33:43,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112628527] [2022-03-18 02:33:43,430 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:33:43,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236640426] [2022-03-18 02:33:43,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236640426] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:33:43,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:33:43,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2022-03-18 02:33:43,430 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:33:43,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [202562999] [2022-03-18 02:33:43,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [202562999] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:33:43,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:33:43,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-18 02:33:43,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798961657] [2022-03-18 02:33:43,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:33:43,431 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 02:33:43,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:33:43,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 02:33:43,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-03-18 02:33:43,432 INFO L87 Difference]: Start difference. First operand 1269 states and 1465 transitions. Second operand has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (41), 15 states have call predecessors, (41), 13 states have return successors, (39), 13 states have call predecessors, (39), 14 states have call successors, (39) [2022-03-18 02:33:44,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:33:44,116 INFO L93 Difference]: Finished difference Result 1398 states and 1626 transitions. [2022-03-18 02:33:44,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-18 02:33:44,116 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (41), 15 states have call predecessors, (41), 13 states have return successors, (39), 13 states have call predecessors, (39), 14 states have call successors, (39) Word has length 251 [2022-03-18 02:33:44,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:33:44,121 INFO L225 Difference]: With dead ends: 1398 [2022-03-18 02:33:44,121 INFO L226 Difference]: Without dead ends: 1389 [2022-03-18 02:33:44,121 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=731, Invalid=991, Unknown=0, NotChecked=0, Total=1722 [2022-03-18 02:33:44,122 INFO L912 BasicCegarLoop]: 68 mSDtfsCounter, 42 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 02:33:44,122 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 246 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 02:33:44,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1389 states. [2022-03-18 02:33:44,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1389 to 1387. [2022-03-18 02:33:44,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1387 states, 909 states have (on average 1.099009900990099) internal successors, (999), 938 states have internal predecessors, (999), 304 states have call successors, (304), 174 states have call predecessors, (304), 173 states have return successors, (301), 274 states have call predecessors, (301), 301 states have call successors, (301) [2022-03-18 02:33:44,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1387 states to 1387 states and 1604 transitions. [2022-03-18 02:33:44,496 INFO L78 Accepts]: Start accepts. Automaton has 1387 states and 1604 transitions. Word has length 251 [2022-03-18 02:33:44,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:33:44,497 INFO L478 AbstractCegarLoop]: Abstraction has 1387 states and 1604 transitions. [2022-03-18 02:33:44,497 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (41), 15 states have call predecessors, (41), 13 states have return successors, (39), 13 states have call predecessors, (39), 14 states have call successors, (39) [2022-03-18 02:33:44,497 INFO L276 IsEmpty]: Start isEmpty. Operand 1387 states and 1604 transitions. [2022-03-18 02:33:44,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-03-18 02:33:44,501 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:33:44,502 INFO L500 BasicCegarLoop]: trace histogram [40, 39, 39, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:33:44,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-18 02:33:44,720 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:33:44,720 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:33:44,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:33:44,720 INFO L85 PathProgramCache]: Analyzing trace with hash -784784430, now seen corresponding path program 25 times [2022-03-18 02:33:44,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:33:44,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1420264652] [2022-03-18 02:33:44,721 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:33:44,721 INFO L85 PathProgramCache]: Analyzing trace with hash -784784430, now seen corresponding path program 26 times [2022-03-18 02:33:44,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:33:44,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867466695] [2022-03-18 02:33:44,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:33:44,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:33:44,727 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:33:44,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1214344787] [2022-03-18 02:33:44,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:33:44,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:33:44,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:33:44,730 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:33:44,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-18 02:33:44,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:33:44,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:33:44,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-18 02:33:44,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:33:45,308 INFO L134 CoverageAnalysis]: Checked inductivity of 3618 backedges. 78 proven. 3380 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2022-03-18 02:33:45,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:33:45,906 INFO L134 CoverageAnalysis]: Checked inductivity of 3618 backedges. 78 proven. 572 refuted. 0 times theorem prover too weak. 2968 trivial. 0 not checked. [2022-03-18 02:33:45,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:33:45,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867466695] [2022-03-18 02:33:45,907 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:33:45,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214344787] [2022-03-18 02:33:45,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214344787] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:33:45,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:33:45,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2022-03-18 02:33:45,908 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:33:45,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1420264652] [2022-03-18 02:33:45,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1420264652] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:33:45,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:33:45,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-18 02:33:45,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686550569] [2022-03-18 02:33:45,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:33:45,909 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-18 02:33:45,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:33:45,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-18 02:33:45,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-03-18 02:33:45,910 INFO L87 Difference]: Start difference. First operand 1387 states and 1604 transitions. Second operand has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 16 states have internal predecessors, (103), 16 states have call successors, (44), 16 states have call predecessors, (44), 14 states have return successors, (42), 14 states have call predecessors, (42), 15 states have call successors, (42) [2022-03-18 02:33:46,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:33:46,645 INFO L93 Difference]: Finished difference Result 1516 states and 1765 transitions. [2022-03-18 02:33:46,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-18 02:33:46,646 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 16 states have internal predecessors, (103), 16 states have call successors, (44), 16 states have call predecessors, (44), 14 states have return successors, (42), 14 states have call predecessors, (42), 15 states have call successors, (42) Word has length 270 [2022-03-18 02:33:46,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:33:46,652 INFO L225 Difference]: With dead ends: 1516 [2022-03-18 02:33:46,652 INFO L226 Difference]: Without dead ends: 1507 [2022-03-18 02:33:46,653 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 552 GetRequests, 509 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=843, Invalid=1137, Unknown=0, NotChecked=0, Total=1980 [2022-03-18 02:33:46,653 INFO L912 BasicCegarLoop]: 71 mSDtfsCounter, 42 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 02:33:46,653 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 268 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 02:33:46,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1507 states. [2022-03-18 02:33:47,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1507 to 1505. [2022-03-18 02:33:47,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1505 states, 985 states have (on average 1.0984771573604062) internal successors, (1082), 1017 states have internal predecessors, (1082), 332 states have call successors, (332), 188 states have call predecessors, (332), 187 states have return successors, (329), 299 states have call predecessors, (329), 329 states have call successors, (329) [2022-03-18 02:33:47,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 1743 transitions. [2022-03-18 02:33:47,050 INFO L78 Accepts]: Start accepts. Automaton has 1505 states and 1743 transitions. Word has length 270 [2022-03-18 02:33:47,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:33:47,051 INFO L478 AbstractCegarLoop]: Abstraction has 1505 states and 1743 transitions. [2022-03-18 02:33:47,051 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 16 states have internal predecessors, (103), 16 states have call successors, (44), 16 states have call predecessors, (44), 14 states have return successors, (42), 14 states have call predecessors, (42), 15 states have call successors, (42) [2022-03-18 02:33:47,051 INFO L276 IsEmpty]: Start isEmpty. Operand 1505 states and 1743 transitions. [2022-03-18 02:33:47,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2022-03-18 02:33:47,056 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:33:47,056 INFO L500 BasicCegarLoop]: trace histogram [43, 42, 42, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:33:47,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-18 02:33:47,271 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-03-18 02:33:47,272 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:33:47,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:33:47,272 INFO L85 PathProgramCache]: Analyzing trace with hash 70094721, now seen corresponding path program 27 times [2022-03-18 02:33:47,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:33:47,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1782180123] [2022-03-18 02:33:47,273 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:33:47,273 INFO L85 PathProgramCache]: Analyzing trace with hash 70094721, now seen corresponding path program 28 times [2022-03-18 02:33:47,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:33:47,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208683763] [2022-03-18 02:33:47,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:33:47,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:33:47,285 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:33:47,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [919868340] [2022-03-18 02:33:47,285 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:33:47,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:33:47,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:33:47,287 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:33:47,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-18 02:33:47,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:33:47,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:33:47,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-18 02:33:47,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:33:48,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4197 backedges. 84 proven. 3941 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-03-18 02:33:48,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:33:48,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4197 backedges. 84 proven. 665 refuted. 0 times theorem prover too weak. 3448 trivial. 0 not checked. [2022-03-18 02:33:48,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:33:48,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208683763] [2022-03-18 02:33:48,660 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:33:48,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919868340] [2022-03-18 02:33:48,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919868340] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:33:48,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:33:48,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2022-03-18 02:33:48,661 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:33:48,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1782180123] [2022-03-18 02:33:48,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1782180123] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:33:48,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:33:48,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-18 02:33:48,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224231525] [2022-03-18 02:33:48,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:33:48,662 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 02:33:48,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:33:48,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 02:33:48,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-03-18 02:33:48,663 INFO L87 Difference]: Start difference. First operand 1505 states and 1743 transitions. Second operand has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 17 states have call successors, (47), 17 states have call predecessors, (47), 15 states have return successors, (45), 15 states have call predecessors, (45), 16 states have call successors, (45) [2022-03-18 02:33:49,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:33:49,450 INFO L93 Difference]: Finished difference Result 1634 states and 1904 transitions. [2022-03-18 02:33:49,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-18 02:33:49,451 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 17 states have call successors, (47), 17 states have call predecessors, (47), 15 states have return successors, (45), 15 states have call predecessors, (45), 16 states have call successors, (45) Word has length 289 [2022-03-18 02:33:49,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:33:49,458 INFO L225 Difference]: With dead ends: 1634 [2022-03-18 02:33:49,458 INFO L226 Difference]: Without dead ends: 1625 [2022-03-18 02:33:49,459 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 545 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=963, Invalid=1293, Unknown=0, NotChecked=0, Total=2256 [2022-03-18 02:33:49,460 INFO L912 BasicCegarLoop]: 74 mSDtfsCounter, 44 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 02:33:49,460 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 270 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 02:33:49,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1625 states. [2022-03-18 02:33:49,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1625 to 1623. [2022-03-18 02:33:49,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1623 states, 1061 states have (on average 1.0980207351555136) internal successors, (1165), 1096 states have internal predecessors, (1165), 360 states have call successors, (360), 202 states have call predecessors, (360), 201 states have return successors, (357), 324 states have call predecessors, (357), 357 states have call successors, (357) [2022-03-18 02:33:49,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1623 states to 1623 states and 1882 transitions. [2022-03-18 02:33:49,995 INFO L78 Accepts]: Start accepts. Automaton has 1623 states and 1882 transitions. Word has length 289 [2022-03-18 02:33:49,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:33:49,995 INFO L478 AbstractCegarLoop]: Abstraction has 1623 states and 1882 transitions. [2022-03-18 02:33:49,995 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 17 states have call successors, (47), 17 states have call predecessors, (47), 15 states have return successors, (45), 15 states have call predecessors, (45), 16 states have call successors, (45) [2022-03-18 02:33:49,996 INFO L276 IsEmpty]: Start isEmpty. Operand 1623 states and 1882 transitions. [2022-03-18 02:33:50,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2022-03-18 02:33:50,001 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:33:50,001 INFO L500 BasicCegarLoop]: trace histogram [46, 45, 45, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:33:50,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-18 02:33:50,215 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-03-18 02:33:50,216 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:33:50,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:33:50,216 INFO L85 PathProgramCache]: Analyzing trace with hash -520827022, now seen corresponding path program 29 times [2022-03-18 02:33:50,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:33:50,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [618846637] [2022-03-18 02:33:50,217 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:33:50,217 INFO L85 PathProgramCache]: Analyzing trace with hash -520827022, now seen corresponding path program 30 times [2022-03-18 02:33:50,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:33:50,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888564907] [2022-03-18 02:33:50,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:33:50,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:33:50,233 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:33:50,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2014258419] [2022-03-18 02:33:50,233 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:33:50,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:33:50,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:33:50,235 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:33:50,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-18 02:33:50,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2022-03-18 02:33:50,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:33:50,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 699 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-18 02:33:50,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:33:51,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4819 backedges. 90 proven. 4545 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-18 02:33:51,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:33:51,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4819 backedges. 90 proven. 765 refuted. 0 times theorem prover too weak. 3964 trivial. 0 not checked. [2022-03-18 02:33:51,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:33:51,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888564907] [2022-03-18 02:33:51,861 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:33:51,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014258419] [2022-03-18 02:33:51,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014258419] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:33:51,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:33:51,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2022-03-18 02:33:51,861 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:33:51,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [618846637] [2022-03-18 02:33:51,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [618846637] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:33:51,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:33:51,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-18 02:33:51,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543027142] [2022-03-18 02:33:51,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:33:51,862 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-18 02:33:51,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:33:51,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-18 02:33:51,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-03-18 02:33:51,863 INFO L87 Difference]: Start difference. First operand 1623 states and 1882 transitions. Second operand has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (50), 18 states have call predecessors, (50), 16 states have return successors, (48), 16 states have call predecessors, (48), 17 states have call successors, (48) [2022-03-18 02:33:52,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:33:52,830 INFO L93 Difference]: Finished difference Result 1752 states and 2043 transitions. [2022-03-18 02:33:52,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-18 02:33:52,831 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (50), 18 states have call predecessors, (50), 16 states have return successors, (48), 16 states have call predecessors, (48), 17 states have call successors, (48) Word has length 308 [2022-03-18 02:33:52,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:33:52,838 INFO L225 Difference]: With dead ends: 1752 [2022-03-18 02:33:52,838 INFO L226 Difference]: Without dead ends: 1743 [2022-03-18 02:33:52,840 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 630 GetRequests, 581 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1091, Invalid=1459, Unknown=0, NotChecked=0, Total=2550 [2022-03-18 02:33:52,840 INFO L912 BasicCegarLoop]: 77 mSDtfsCounter, 54 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 02:33:52,840 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 282 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 02:33:52,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1743 states. [2022-03-18 02:33:53,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1743 to 1741. [2022-03-18 02:33:53,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1741 states, 1137 states have (on average 1.0976253298153034) internal successors, (1248), 1175 states have internal predecessors, (1248), 388 states have call successors, (388), 216 states have call predecessors, (388), 215 states have return successors, (385), 349 states have call predecessors, (385), 385 states have call successors, (385) [2022-03-18 02:33:53,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1741 states to 1741 states and 2021 transitions. [2022-03-18 02:33:53,372 INFO L78 Accepts]: Start accepts. Automaton has 1741 states and 2021 transitions. Word has length 308 [2022-03-18 02:33:53,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:33:53,372 INFO L478 AbstractCegarLoop]: Abstraction has 1741 states and 2021 transitions. [2022-03-18 02:33:53,372 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (50), 18 states have call predecessors, (50), 16 states have return successors, (48), 16 states have call predecessors, (48), 17 states have call successors, (48) [2022-03-18 02:33:53,372 INFO L276 IsEmpty]: Start isEmpty. Operand 1741 states and 2021 transitions. [2022-03-18 02:33:53,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2022-03-18 02:33:53,376 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:33:53,376 INFO L500 BasicCegarLoop]: trace histogram [49, 48, 48, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:33:53,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-18 02:33:53,576 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-03-18 02:33:53,577 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:33:53,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:33:53,577 INFO L85 PathProgramCache]: Analyzing trace with hash 199884769, now seen corresponding path program 31 times [2022-03-18 02:33:53,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:33:53,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [590414391] [2022-03-18 02:33:53,577 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:33:53,578 INFO L85 PathProgramCache]: Analyzing trace with hash 199884769, now seen corresponding path program 32 times [2022-03-18 02:33:53,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:33:53,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205406700] [2022-03-18 02:33:53,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:33:53,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:33:53,585 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:33:53,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1821287644] [2022-03-18 02:33:53,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:33:53,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:33:53,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:33:53,586 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:33:53,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-18 02:33:53,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:33:53,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:33:53,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 739 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-18 02:33:53,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:33:54,264 INFO L134 CoverageAnalysis]: Checked inductivity of 5484 backedges. 96 proven. 5192 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-03-18 02:33:54,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:33:55,044 INFO L134 CoverageAnalysis]: Checked inductivity of 5484 backedges. 96 proven. 872 refuted. 0 times theorem prover too weak. 4516 trivial. 0 not checked. [2022-03-18 02:33:55,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:33:55,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205406700] [2022-03-18 02:33:55,045 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:33:55,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821287644] [2022-03-18 02:33:55,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821287644] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:33:55,045 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:33:55,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2022-03-18 02:33:55,045 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:33:55,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [590414391] [2022-03-18 02:33:55,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [590414391] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:33:55,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:33:55,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-18 02:33:55,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293034189] [2022-03-18 02:33:55,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:33:55,046 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-18 02:33:55,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:33:55,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-18 02:33:55,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-03-18 02:33:55,047 INFO L87 Difference]: Start difference. First operand 1741 states and 2021 transitions. Second operand has 20 states, 20 states have (on average 6.2) internal successors, (124), 19 states have internal predecessors, (124), 19 states have call successors, (53), 19 states have call predecessors, (53), 17 states have return successors, (51), 17 states have call predecessors, (51), 18 states have call successors, (51) [2022-03-18 02:33:55,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:33:55,898 INFO L93 Difference]: Finished difference Result 1870 states and 2182 transitions. [2022-03-18 02:33:55,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-18 02:33:55,899 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 6.2) internal successors, (124), 19 states have internal predecessors, (124), 19 states have call successors, (53), 19 states have call predecessors, (53), 17 states have return successors, (51), 17 states have call predecessors, (51), 18 states have call successors, (51) Word has length 327 [2022-03-18 02:33:55,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:33:55,905 INFO L225 Difference]: With dead ends: 1870 [2022-03-18 02:33:55,905 INFO L226 Difference]: Without dead ends: 1861 [2022-03-18 02:33:55,907 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 669 GetRequests, 617 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1227, Invalid=1635, Unknown=0, NotChecked=0, Total=2862 [2022-03-18 02:33:55,907 INFO L912 BasicCegarLoop]: 80 mSDtfsCounter, 60 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 02:33:55,907 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 284 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 02:33:55,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2022-03-18 02:33:56,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 1859. [2022-03-18 02:33:56,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1859 states, 1213 states have (on average 1.0972794723825228) internal successors, (1331), 1254 states have internal predecessors, (1331), 416 states have call successors, (416), 230 states have call predecessors, (416), 229 states have return successors, (413), 374 states have call predecessors, (413), 413 states have call successors, (413) [2022-03-18 02:33:56,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1859 states to 1859 states and 2160 transitions. [2022-03-18 02:33:56,515 INFO L78 Accepts]: Start accepts. Automaton has 1859 states and 2160 transitions. Word has length 327 [2022-03-18 02:33:56,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:33:56,515 INFO L478 AbstractCegarLoop]: Abstraction has 1859 states and 2160 transitions. [2022-03-18 02:33:56,516 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.2) internal successors, (124), 19 states have internal predecessors, (124), 19 states have call successors, (53), 19 states have call predecessors, (53), 17 states have return successors, (51), 17 states have call predecessors, (51), 18 states have call successors, (51) [2022-03-18 02:33:56,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1859 states and 2160 transitions. [2022-03-18 02:33:56,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2022-03-18 02:33:56,521 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:33:56,521 INFO L500 BasicCegarLoop]: trace histogram [52, 51, 51, 18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:33:56,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-18 02:33:56,735 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:33:56,735 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:33:56,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:33:56,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1842167022, now seen corresponding path program 33 times [2022-03-18 02:33:56,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:33:56,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1658243330] [2022-03-18 02:33:56,736 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:33:56,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1842167022, now seen corresponding path program 34 times [2022-03-18 02:33:56,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:33:56,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908864864] [2022-03-18 02:33:56,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:33:56,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:33:56,748 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:33:56,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [899928356] [2022-03-18 02:33:56,749 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:33:56,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:33:56,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:33:56,750 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:33:56,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-18 02:33:56,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:33:56,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:33:56,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-18 02:33:56,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:33:57,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6192 backedges. 102 proven. 5882 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2022-03-18 02:33:57,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:33:58,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6192 backedges. 102 proven. 986 refuted. 0 times theorem prover too weak. 5104 trivial. 0 not checked. [2022-03-18 02:33:58,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:33:58,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908864864] [2022-03-18 02:33:58,396 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:33:58,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899928356] [2022-03-18 02:33:58,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899928356] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:33:58,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:33:58,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2022-03-18 02:33:58,397 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:33:58,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1658243330] [2022-03-18 02:33:58,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1658243330] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:33:58,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:33:58,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-18 02:33:58,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015285500] [2022-03-18 02:33:58,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:33:58,397 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-18 02:33:58,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:33:58,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-18 02:33:58,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=852, Unknown=0, NotChecked=0, Total=1560 [2022-03-18 02:33:58,399 INFO L87 Difference]: Start difference. First operand 1859 states and 2160 transitions. Second operand has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (56), 20 states have call predecessors, (56), 18 states have return successors, (54), 18 states have call predecessors, (54), 19 states have call successors, (54) [2022-03-18 02:33:59,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:33:59,406 INFO L93 Difference]: Finished difference Result 1988 states and 2321 transitions. [2022-03-18 02:33:59,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-18 02:33:59,407 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (56), 20 states have call predecessors, (56), 18 states have return successors, (54), 18 states have call predecessors, (54), 19 states have call successors, (54) Word has length 346 [2022-03-18 02:33:59,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:33:59,416 INFO L225 Difference]: With dead ends: 1988 [2022-03-18 02:33:59,416 INFO L226 Difference]: Without dead ends: 1979 [2022-03-18 02:33:59,418 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 708 GetRequests, 653 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1371, Invalid=1821, Unknown=0, NotChecked=0, Total=3192 [2022-03-18 02:33:59,418 INFO L912 BasicCegarLoop]: 83 mSDtfsCounter, 69 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 02:33:59,418 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 306 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 02:33:59,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1979 states. [2022-03-18 02:33:59,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1979 to 1977. [2022-03-18 02:33:59,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1977 states, 1289 states have (on average 1.0969743987587277) internal successors, (1414), 1333 states have internal predecessors, (1414), 444 states have call successors, (444), 244 states have call predecessors, (444), 243 states have return successors, (441), 399 states have call predecessors, (441), 441 states have call successors, (441) [2022-03-18 02:33:59,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1977 states to 1977 states and 2299 transitions. [2022-03-18 02:33:59,958 INFO L78 Accepts]: Start accepts. Automaton has 1977 states and 2299 transitions. Word has length 346 [2022-03-18 02:33:59,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:33:59,959 INFO L478 AbstractCegarLoop]: Abstraction has 1977 states and 2299 transitions. [2022-03-18 02:33:59,959 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (56), 20 states have call predecessors, (56), 18 states have return successors, (54), 18 states have call predecessors, (54), 19 states have call successors, (54) [2022-03-18 02:33:59,959 INFO L276 IsEmpty]: Start isEmpty. Operand 1977 states and 2299 transitions. [2022-03-18 02:33:59,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2022-03-18 02:33:59,965 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:33:59,965 INFO L500 BasicCegarLoop]: trace histogram [55, 54, 54, 19, 18, 18, 18, 18, 18, 18, 18, 18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:33:59,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-18 02:34:00,191 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-18 02:34:00,191 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:34:00,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:34:00,192 INFO L85 PathProgramCache]: Analyzing trace with hash 858728513, now seen corresponding path program 35 times [2022-03-18 02:34:00,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:00,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1029006668] [2022-03-18 02:34:00,193 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:34:00,193 INFO L85 PathProgramCache]: Analyzing trace with hash 858728513, now seen corresponding path program 36 times [2022-03-18 02:34:00,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:34:00,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56358935] [2022-03-18 02:34:00,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:34:00,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:34:00,201 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:34:00,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [483348265] [2022-03-18 02:34:00,201 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:34:00,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:34:00,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:34:00,202 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:34:00,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-18 02:34:02,163 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2022-03-18 02:34:02,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:34:02,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 819 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-18 02:34:02,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:34:02,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6943 backedges. 108 proven. 6615 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-18 02:34:02,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:34:03,775 INFO L134 CoverageAnalysis]: Checked inductivity of 6943 backedges. 108 proven. 1107 refuted. 0 times theorem prover too weak. 5728 trivial. 0 not checked. [2022-03-18 02:34:03,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:34:03,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56358935] [2022-03-18 02:34:03,776 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:34:03,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483348265] [2022-03-18 02:34:03,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483348265] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:34:03,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:34:03,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2022-03-18 02:34:03,776 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:34:03,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1029006668] [2022-03-18 02:34:03,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1029006668] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:34:03,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:34:03,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-18 02:34:03,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814222671] [2022-03-18 02:34:03,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:34:03,778 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-18 02:34:03,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:03,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-18 02:34:03,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=937, Unknown=0, NotChecked=0, Total=1722 [2022-03-18 02:34:03,779 INFO L87 Difference]: Start difference. First operand 1977 states and 2299 transitions. Second operand has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 21 states have call successors, (59), 21 states have call predecessors, (59), 19 states have return successors, (57), 19 states have call predecessors, (57), 20 states have call successors, (57) [2022-03-18 02:34:04,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:34:04,789 INFO L93 Difference]: Finished difference Result 2106 states and 2460 transitions. [2022-03-18 02:34:04,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-18 02:34:04,790 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 21 states have call successors, (59), 21 states have call predecessors, (59), 19 states have return successors, (57), 19 states have call predecessors, (57), 20 states have call successors, (57) Word has length 365 [2022-03-18 02:34:04,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:34:04,798 INFO L225 Difference]: With dead ends: 2106 [2022-03-18 02:34:04,798 INFO L226 Difference]: Without dead ends: 2097 [2022-03-18 02:34:04,800 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 747 GetRequests, 689 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1523, Invalid=2017, Unknown=0, NotChecked=0, Total=3540 [2022-03-18 02:34:04,800 INFO L912 BasicCegarLoop]: 86 mSDtfsCounter, 66 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 02:34:04,801 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 328 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 02:34:04,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2022-03-18 02:34:05,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 2095. [2022-03-18 02:34:05,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2095 states, 1365 states have (on average 1.0967032967032968) internal successors, (1497), 1412 states have internal predecessors, (1497), 472 states have call successors, (472), 258 states have call predecessors, (472), 257 states have return successors, (469), 424 states have call predecessors, (469), 469 states have call successors, (469) [2022-03-18 02:34:05,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2095 states to 2095 states and 2438 transitions. [2022-03-18 02:34:05,362 INFO L78 Accepts]: Start accepts. Automaton has 2095 states and 2438 transitions. Word has length 365 [2022-03-18 02:34:05,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:34:05,363 INFO L478 AbstractCegarLoop]: Abstraction has 2095 states and 2438 transitions. [2022-03-18 02:34:05,363 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 21 states have call successors, (59), 21 states have call predecessors, (59), 19 states have return successors, (57), 19 states have call predecessors, (57), 20 states have call successors, (57) [2022-03-18 02:34:05,363 INFO L276 IsEmpty]: Start isEmpty. Operand 2095 states and 2438 transitions. [2022-03-18 02:34:05,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2022-03-18 02:34:05,368 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:34:05,369 INFO L500 BasicCegarLoop]: trace histogram [58, 57, 57, 20, 19, 19, 19, 19, 19, 19, 19, 19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:34:05,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-18 02:34:05,569 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-18 02:34:05,569 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:34:05,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:34:05,570 INFO L85 PathProgramCache]: Analyzing trace with hash -117637454, now seen corresponding path program 37 times [2022-03-18 02:34:05,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:05,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1989278324] [2022-03-18 02:34:05,570 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:34:05,570 INFO L85 PathProgramCache]: Analyzing trace with hash -117637454, now seen corresponding path program 38 times [2022-03-18 02:34:05,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:34:05,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485426897] [2022-03-18 02:34:05,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:34:05,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:34:05,579 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:34:05,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1291499265] [2022-03-18 02:34:05,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:34:05,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:34:05,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:34:05,581 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:34:05,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-18 02:34:05,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:34:05,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:34:05,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 859 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-18 02:34:05,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:34:06,445 INFO L134 CoverageAnalysis]: Checked inductivity of 7737 backedges. 114 proven. 7391 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2022-03-18 02:34:06,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:34:07,380 INFO L134 CoverageAnalysis]: Checked inductivity of 7737 backedges. 114 proven. 1235 refuted. 0 times theorem prover too weak. 6388 trivial. 0 not checked. [2022-03-18 02:34:07,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:34:07,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485426897] [2022-03-18 02:34:07,380 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:34:07,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291499265] [2022-03-18 02:34:07,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291499265] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:34:07,380 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:34:07,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2022-03-18 02:34:07,381 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:34:07,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1989278324] [2022-03-18 02:34:07,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1989278324] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:34:07,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:34:07,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-18 02:34:07,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719117132] [2022-03-18 02:34:07,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:34:07,382 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-18 02:34:07,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:07,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-18 02:34:07,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=1026, Unknown=0, NotChecked=0, Total=1892 [2022-03-18 02:34:07,383 INFO L87 Difference]: Start difference. First operand 2095 states and 2438 transitions. Second operand has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 22 states have call successors, (62), 22 states have call predecessors, (62), 20 states have return successors, (60), 20 states have call predecessors, (60), 21 states have call successors, (60) [2022-03-18 02:34:08,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:34:08,441 INFO L93 Difference]: Finished difference Result 2224 states and 2599 transitions. [2022-03-18 02:34:08,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-18 02:34:08,442 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 22 states have call successors, (62), 22 states have call predecessors, (62), 20 states have return successors, (60), 20 states have call predecessors, (60), 21 states have call successors, (60) Word has length 384 [2022-03-18 02:34:08,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:34:08,451 INFO L225 Difference]: With dead ends: 2224 [2022-03-18 02:34:08,451 INFO L226 Difference]: Without dead ends: 2215 [2022-03-18 02:34:08,452 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 786 GetRequests, 725 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1683, Invalid=2223, Unknown=0, NotChecked=0, Total=3906 [2022-03-18 02:34:08,452 INFO L912 BasicCegarLoop]: 89 mSDtfsCounter, 56 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 02:34:08,453 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 360 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 02:34:08,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2215 states. [2022-03-18 02:34:09,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2215 to 2213. [2022-03-18 02:34:09,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2213 states, 1441 states have (on average 1.0964607911172797) internal successors, (1580), 1491 states have internal predecessors, (1580), 500 states have call successors, (500), 272 states have call predecessors, (500), 271 states have return successors, (497), 449 states have call predecessors, (497), 497 states have call successors, (497) [2022-03-18 02:34:09,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2213 states to 2213 states and 2577 transitions. [2022-03-18 02:34:09,109 INFO L78 Accepts]: Start accepts. Automaton has 2213 states and 2577 transitions. Word has length 384 [2022-03-18 02:34:09,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:34:09,109 INFO L478 AbstractCegarLoop]: Abstraction has 2213 states and 2577 transitions. [2022-03-18 02:34:09,109 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 22 states have call successors, (62), 22 states have call predecessors, (62), 20 states have return successors, (60), 20 states have call predecessors, (60), 21 states have call successors, (60) [2022-03-18 02:34:09,110 INFO L276 IsEmpty]: Start isEmpty. Operand 2213 states and 2577 transitions. [2022-03-18 02:34:09,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2022-03-18 02:34:09,115 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:34:09,116 INFO L500 BasicCegarLoop]: trace histogram [61, 60, 60, 21, 20, 20, 20, 20, 20, 20, 20, 20, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:34:09,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-18 02:34:09,323 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:34:09,324 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:34:09,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:34:09,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1169361057, now seen corresponding path program 39 times [2022-03-18 02:34:09,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:09,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [215219101] [2022-03-18 02:34:09,325 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:34:09,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1169361057, now seen corresponding path program 40 times [2022-03-18 02:34:09,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:34:09,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679425101] [2022-03-18 02:34:09,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:34:09,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:34:09,333 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:34:09,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1076055867] [2022-03-18 02:34:09,333 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:34:09,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:34:09,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:34:09,335 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:34:09,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-18 02:34:09,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:34:09,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:34:09,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 899 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-18 02:34:09,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:34:10,302 INFO L134 CoverageAnalysis]: Checked inductivity of 8574 backedges. 120 proven. 8210 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2022-03-18 02:34:10,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:34:11,335 INFO L134 CoverageAnalysis]: Checked inductivity of 8574 backedges. 120 proven. 1370 refuted. 0 times theorem prover too weak. 7084 trivial. 0 not checked. [2022-03-18 02:34:11,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:34:11,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679425101] [2022-03-18 02:34:11,336 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:34:11,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076055867] [2022-03-18 02:34:11,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076055867] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:34:11,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:34:11,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2022-03-18 02:34:11,336 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:34:11,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [215219101] [2022-03-18 02:34:11,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [215219101] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:34:11,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:34:11,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-18 02:34:11,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022563255] [2022-03-18 02:34:11,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:34:11,337 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-18 02:34:11,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:11,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-18 02:34:11,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2022-03-18 02:34:11,338 INFO L87 Difference]: Start difference. First operand 2213 states and 2577 transitions. Second operand has 24 states, 24 states have (on average 6.333333333333333) internal successors, (152), 23 states have internal predecessors, (152), 23 states have call successors, (65), 23 states have call predecessors, (65), 21 states have return successors, (63), 21 states have call predecessors, (63), 22 states have call successors, (63) [2022-03-18 02:34:12,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:34:12,512 INFO L93 Difference]: Finished difference Result 2342 states and 2738 transitions. [2022-03-18 02:34:12,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-18 02:34:12,512 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 6.333333333333333) internal successors, (152), 23 states have internal predecessors, (152), 23 states have call successors, (65), 23 states have call predecessors, (65), 21 states have return successors, (63), 21 states have call predecessors, (63), 22 states have call successors, (63) Word has length 403 [2022-03-18 02:34:12,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:34:12,521 INFO L225 Difference]: With dead ends: 2342 [2022-03-18 02:34:12,522 INFO L226 Difference]: Without dead ends: 2333 [2022-03-18 02:34:12,523 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 825 GetRequests, 761 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1851, Invalid=2439, Unknown=0, NotChecked=0, Total=4290 [2022-03-18 02:34:12,523 INFO L912 BasicCegarLoop]: 92 mSDtfsCounter, 71 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 02:34:12,523 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 362 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 02:34:12,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2333 states. [2022-03-18 02:34:13,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2333 to 2331. [2022-03-18 02:34:13,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 1517 states have (on average 1.096242584047462) internal successors, (1663), 1570 states have internal predecessors, (1663), 528 states have call successors, (528), 286 states have call predecessors, (528), 285 states have return successors, (525), 474 states have call predecessors, (525), 525 states have call successors, (525) [2022-03-18 02:34:13,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 2716 transitions. [2022-03-18 02:34:13,155 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 2716 transitions. Word has length 403 [2022-03-18 02:34:13,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:34:13,156 INFO L478 AbstractCegarLoop]: Abstraction has 2331 states and 2716 transitions. [2022-03-18 02:34:13,156 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.333333333333333) internal successors, (152), 23 states have internal predecessors, (152), 23 states have call successors, (65), 23 states have call predecessors, (65), 21 states have return successors, (63), 21 states have call predecessors, (63), 22 states have call successors, (63) [2022-03-18 02:34:13,156 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 2716 transitions. [2022-03-18 02:34:13,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2022-03-18 02:34:13,162 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:34:13,162 INFO L500 BasicCegarLoop]: trace histogram [64, 63, 63, 22, 21, 21, 21, 21, 21, 21, 21, 21, 21, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:34:13,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-18 02:34:13,371 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-03-18 02:34:13,371 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:34:13,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:34:13,372 INFO L85 PathProgramCache]: Analyzing trace with hash -774012334, now seen corresponding path program 41 times [2022-03-18 02:34:13,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:13,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [758614048] [2022-03-18 02:34:13,372 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:34:13,372 INFO L85 PathProgramCache]: Analyzing trace with hash -774012334, now seen corresponding path program 42 times [2022-03-18 02:34:13,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:34:13,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34555092] [2022-03-18 02:34:13,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:34:13,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:34:13,382 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:34:13,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1619341668] [2022-03-18 02:34:13,383 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:34:13,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:34:13,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:34:13,384 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:34:13,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-18 02:34:15,509 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 42 check-sat command(s) [2022-03-18 02:34:15,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:34:15,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 939 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-18 02:34:15,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:34:16,354 INFO L134 CoverageAnalysis]: Checked inductivity of 9454 backedges. 126 proven. 9072 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2022-03-18 02:34:16,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:34:17,433 INFO L134 CoverageAnalysis]: Checked inductivity of 9454 backedges. 126 proven. 1512 refuted. 0 times theorem prover too weak. 7816 trivial. 0 not checked. [2022-03-18 02:34:17,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:34:17,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34555092] [2022-03-18 02:34:17,433 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:34:17,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619341668] [2022-03-18 02:34:17,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619341668] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:34:17,434 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:34:17,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2022-03-18 02:34:17,434 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:34:17,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [758614048] [2022-03-18 02:34:17,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [758614048] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:34:17,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:34:17,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-18 02:34:17,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119213246] [2022-03-18 02:34:17,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:34:17,435 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-18 02:34:17,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:17,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-18 02:34:17,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=1216, Unknown=0, NotChecked=0, Total=2256 [2022-03-18 02:34:17,436 INFO L87 Difference]: Start difference. First operand 2331 states and 2716 transitions. Second operand has 25 states, 25 states have (on average 6.36) internal successors, (159), 24 states have internal predecessors, (159), 24 states have call successors, (68), 24 states have call predecessors, (68), 22 states have return successors, (66), 22 states have call predecessors, (66), 23 states have call successors, (66) [2022-03-18 02:34:18,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:34:18,576 INFO L93 Difference]: Finished difference Result 2460 states and 2877 transitions. [2022-03-18 02:34:18,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-18 02:34:18,576 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 6.36) internal successors, (159), 24 states have internal predecessors, (159), 24 states have call successors, (68), 24 states have call predecessors, (68), 22 states have return successors, (66), 22 states have call predecessors, (66), 23 states have call successors, (66) Word has length 422 [2022-03-18 02:34:18,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:34:18,585 INFO L225 Difference]: With dead ends: 2460 [2022-03-18 02:34:18,585 INFO L226 Difference]: Without dead ends: 2451 [2022-03-18 02:34:18,586 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 864 GetRequests, 797 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2027, Invalid=2665, Unknown=0, NotChecked=0, Total=4692 [2022-03-18 02:34:18,587 INFO L912 BasicCegarLoop]: 95 mSDtfsCounter, 103 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 02:34:18,587 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 354 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 02:34:18,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2451 states. [2022-03-18 02:34:19,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2451 to 2449. [2022-03-18 02:34:19,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2449 states, 1593 states have (on average 1.0960451977401129) internal successors, (1746), 1649 states have internal predecessors, (1746), 556 states have call successors, (556), 300 states have call predecessors, (556), 299 states have return successors, (553), 499 states have call predecessors, (553), 553 states have call successors, (553) [2022-03-18 02:34:19,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2449 states to 2449 states and 2855 transitions. [2022-03-18 02:34:19,254 INFO L78 Accepts]: Start accepts. Automaton has 2449 states and 2855 transitions. Word has length 422 [2022-03-18 02:34:19,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:34:19,255 INFO L478 AbstractCegarLoop]: Abstraction has 2449 states and 2855 transitions. [2022-03-18 02:34:19,255 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.36) internal successors, (159), 24 states have internal predecessors, (159), 24 states have call successors, (68), 24 states have call predecessors, (68), 22 states have return successors, (66), 22 states have call predecessors, (66), 23 states have call successors, (66) [2022-03-18 02:34:19,255 INFO L276 IsEmpty]: Start isEmpty. Operand 2449 states and 2855 transitions. [2022-03-18 02:34:19,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2022-03-18 02:34:19,261 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:34:19,261 INFO L500 BasicCegarLoop]: trace histogram [67, 66, 66, 23, 22, 22, 22, 22, 22, 22, 22, 22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:34:19,282 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-03-18 02:34:19,462 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:34:19,462 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:34:19,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:34:19,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1767137023, now seen corresponding path program 43 times [2022-03-18 02:34:19,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:19,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [226395112] [2022-03-18 02:34:19,463 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:34:19,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1767137023, now seen corresponding path program 44 times [2022-03-18 02:34:19,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:34:19,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154751646] [2022-03-18 02:34:19,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:34:19,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:34:19,474 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:34:19,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [158580931] [2022-03-18 02:34:19,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:34:19,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:34:19,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:34:19,477 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:34:19,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-18 02:34:19,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:34:19,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:34:19,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-18 02:34:19,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:34:20,499 INFO L134 CoverageAnalysis]: Checked inductivity of 10377 backedges. 132 proven. 9977 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-18 02:34:20,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:34:21,671 INFO L134 CoverageAnalysis]: Checked inductivity of 10377 backedges. 132 proven. 1661 refuted. 0 times theorem prover too weak. 8584 trivial. 0 not checked. [2022-03-18 02:34:21,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:34:21,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154751646] [2022-03-18 02:34:21,672 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:34:21,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158580931] [2022-03-18 02:34:21,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158580931] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:34:21,672 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:34:21,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-03-18 02:34:21,672 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:34:21,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [226395112] [2022-03-18 02:34:21,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [226395112] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:34:21,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:34:21,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-18 02:34:21,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481227744] [2022-03-18 02:34:21,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:34:21,673 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-18 02:34:21,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:21,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-18 02:34:21,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2022-03-18 02:34:21,674 INFO L87 Difference]: Start difference. First operand 2449 states and 2855 transitions. Second operand has 26 states, 26 states have (on average 6.384615384615385) internal successors, (166), 25 states have internal predecessors, (166), 25 states have call successors, (71), 25 states have call predecessors, (71), 23 states have return successors, (69), 23 states have call predecessors, (69), 24 states have call successors, (69) [2022-03-18 02:34:22,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:34:22,886 INFO L93 Difference]: Finished difference Result 2578 states and 3016 transitions. [2022-03-18 02:34:22,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-18 02:34:22,886 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 6.384615384615385) internal successors, (166), 25 states have internal predecessors, (166), 25 states have call successors, (71), 25 states have call predecessors, (71), 23 states have return successors, (69), 23 states have call predecessors, (69), 24 states have call successors, (69) Word has length 441 [2022-03-18 02:34:22,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:34:22,893 INFO L225 Difference]: With dead ends: 2578 [2022-03-18 02:34:22,894 INFO L226 Difference]: Without dead ends: 2569 [2022-03-18 02:34:22,894 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 903 GetRequests, 833 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2211, Invalid=2901, Unknown=0, NotChecked=0, Total=5112 [2022-03-18 02:34:22,894 INFO L912 BasicCegarLoop]: 98 mSDtfsCounter, 72 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 02:34:22,895 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 376 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 02:34:22,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2569 states. [2022-03-18 02:34:23,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2569 to 2567. [2022-03-18 02:34:23,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2567 states, 1669 states have (on average 1.0958657878969442) internal successors, (1829), 1728 states have internal predecessors, (1829), 584 states have call successors, (584), 314 states have call predecessors, (584), 313 states have return successors, (581), 524 states have call predecessors, (581), 581 states have call successors, (581) [2022-03-18 02:34:23,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2567 states to 2567 states and 2994 transitions. [2022-03-18 02:34:23,636 INFO L78 Accepts]: Start accepts. Automaton has 2567 states and 2994 transitions. Word has length 441 [2022-03-18 02:34:23,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:34:23,637 INFO L478 AbstractCegarLoop]: Abstraction has 2567 states and 2994 transitions. [2022-03-18 02:34:23,637 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.384615384615385) internal successors, (166), 25 states have internal predecessors, (166), 25 states have call successors, (71), 25 states have call predecessors, (71), 23 states have return successors, (69), 23 states have call predecessors, (69), 24 states have call successors, (69) [2022-03-18 02:34:23,637 INFO L276 IsEmpty]: Start isEmpty. Operand 2567 states and 2994 transitions. [2022-03-18 02:34:23,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2022-03-18 02:34:23,644 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:34:23,644 INFO L500 BasicCegarLoop]: trace histogram [70, 69, 69, 24, 23, 23, 23, 23, 23, 23, 23, 23, 23, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:34:23,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-18 02:34:23,845 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-03-18 02:34:23,845 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:34:23,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:34:23,845 INFO L85 PathProgramCache]: Analyzing trace with hash 568217074, now seen corresponding path program 45 times [2022-03-18 02:34:23,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:23,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [257668471] [2022-03-18 02:34:23,846 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:34:23,846 INFO L85 PathProgramCache]: Analyzing trace with hash 568217074, now seen corresponding path program 46 times [2022-03-18 02:34:23,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:34:23,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786772189] [2022-03-18 02:34:23,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:34:23,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:34:23,854 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:34:23,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1645225654] [2022-03-18 02:34:23,855 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:34:23,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:34:23,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:34:23,856 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:34:23,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-18 02:34:24,002 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:34:24,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:34:24,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 1019 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-18 02:34:24,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:34:24,933 INFO L134 CoverageAnalysis]: Checked inductivity of 11343 backedges. 138 proven. 10925 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2022-03-18 02:34:24,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:34:26,157 INFO L134 CoverageAnalysis]: Checked inductivity of 11343 backedges. 138 proven. 1817 refuted. 0 times theorem prover too weak. 9388 trivial. 0 not checked. [2022-03-18 02:34:26,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:34:26,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786772189] [2022-03-18 02:34:26,157 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:34:26,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645225654] [2022-03-18 02:34:26,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645225654] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:34:26,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:34:26,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2022-03-18 02:34:26,158 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:34:26,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [257668471] [2022-03-18 02:34:26,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [257668471] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:34:26,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:34:26,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-18 02:34:26,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299073199] [2022-03-18 02:34:26,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:34:26,159 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-18 02:34:26,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:26,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-18 02:34:26,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1230, Invalid=1422, Unknown=0, NotChecked=0, Total=2652 [2022-03-18 02:34:26,162 INFO L87 Difference]: Start difference. First operand 2567 states and 2994 transitions. Second operand has 27 states, 27 states have (on average 6.407407407407407) internal successors, (173), 26 states have internal predecessors, (173), 26 states have call successors, (74), 26 states have call predecessors, (74), 24 states have return successors, (72), 24 states have call predecessors, (72), 25 states have call successors, (72) [2022-03-18 02:34:27,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:34:27,483 INFO L93 Difference]: Finished difference Result 2696 states and 3155 transitions. [2022-03-18 02:34:27,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-18 02:34:27,483 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 6.407407407407407) internal successors, (173), 26 states have internal predecessors, (173), 26 states have call successors, (74), 26 states have call predecessors, (74), 24 states have return successors, (72), 24 states have call predecessors, (72), 25 states have call successors, (72) Word has length 460 [2022-03-18 02:34:27,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:34:27,491 INFO L225 Difference]: With dead ends: 2696 [2022-03-18 02:34:27,492 INFO L226 Difference]: Without dead ends: 2687 [2022-03-18 02:34:27,492 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 942 GetRequests, 869 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2403, Invalid=3147, Unknown=0, NotChecked=0, Total=5550 [2022-03-18 02:34:27,493 INFO L912 BasicCegarLoop]: 101 mSDtfsCounter, 87 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 02:34:27,493 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 408 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 02:34:27,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2687 states. [2022-03-18 02:34:28,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2687 to 2685. [2022-03-18 02:34:28,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2685 states, 1745 states have (on average 1.095702005730659) internal successors, (1912), 1807 states have internal predecessors, (1912), 612 states have call successors, (612), 328 states have call predecessors, (612), 327 states have return successors, (609), 549 states have call predecessors, (609), 609 states have call successors, (609) [2022-03-18 02:34:28,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2685 states to 2685 states and 3133 transitions. [2022-03-18 02:34:28,330 INFO L78 Accepts]: Start accepts. Automaton has 2685 states and 3133 transitions. Word has length 460 [2022-03-18 02:34:28,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:34:28,330 INFO L478 AbstractCegarLoop]: Abstraction has 2685 states and 3133 transitions. [2022-03-18 02:34:28,330 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.407407407407407) internal successors, (173), 26 states have internal predecessors, (173), 26 states have call successors, (74), 26 states have call predecessors, (74), 24 states have return successors, (72), 24 states have call predecessors, (72), 25 states have call successors, (72) [2022-03-18 02:34:28,331 INFO L276 IsEmpty]: Start isEmpty. Operand 2685 states and 3133 transitions. [2022-03-18 02:34:28,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2022-03-18 02:34:28,339 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:34:28,339 INFO L500 BasicCegarLoop]: trace histogram [73, 72, 72, 25, 24, 24, 24, 24, 24, 24, 24, 24, 24, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:34:28,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-18 02:34:28,541 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-03-18 02:34:28,541 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:34:28,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:34:28,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1624174945, now seen corresponding path program 47 times [2022-03-18 02:34:28,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:28,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [798749045] [2022-03-18 02:34:28,542 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:34:28,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1624174945, now seen corresponding path program 48 times [2022-03-18 02:34:28,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:34:28,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330203838] [2022-03-18 02:34:28,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:34:28,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:34:28,552 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:34:28,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [164363396] [2022-03-18 02:34:28,552 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:34:28,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:34:28,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:34:28,553 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:34:28,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-18 02:34:28,919 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 45 check-sat command(s) [2022-03-18 02:34:28,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:34:28,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 1032 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-18 02:34:28,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:34:29,902 INFO L134 CoverageAnalysis]: Checked inductivity of 12352 backedges. 144 proven. 11916 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2022-03-18 02:34:29,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:34:31,229 INFO L134 CoverageAnalysis]: Checked inductivity of 12352 backedges. 144 proven. 1980 refuted. 0 times theorem prover too weak. 10228 trivial. 0 not checked. [2022-03-18 02:34:31,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:34:31,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330203838] [2022-03-18 02:34:31,230 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:34:31,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164363396] [2022-03-18 02:34:31,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164363396] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:34:31,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:34:31,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2022-03-18 02:34:31,230 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:34:31,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [798749045] [2022-03-18 02:34:31,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [798749045] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:34:31,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:34:31,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-18 02:34:31,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420932077] [2022-03-18 02:34:31,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:34:31,231 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-18 02:34:31,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:31,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-18 02:34:31,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-18 02:34:31,232 INFO L87 Difference]: Start difference. First operand 2685 states and 3133 transitions. Second operand has 28 states, 28 states have (on average 6.428571428571429) internal successors, (180), 27 states have internal predecessors, (180), 27 states have call successors, (77), 27 states have call predecessors, (77), 25 states have return successors, (75), 25 states have call predecessors, (75), 26 states have call successors, (75) [2022-03-18 02:34:32,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:34:32,558 INFO L93 Difference]: Finished difference Result 2814 states and 3294 transitions. [2022-03-18 02:34:32,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-18 02:34:32,558 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 6.428571428571429) internal successors, (180), 27 states have internal predecessors, (180), 27 states have call successors, (77), 27 states have call predecessors, (77), 25 states have return successors, (75), 25 states have call predecessors, (75), 26 states have call successors, (75) Word has length 479 [2022-03-18 02:34:32,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:34:32,564 INFO L225 Difference]: With dead ends: 2814 [2022-03-18 02:34:32,565 INFO L226 Difference]: Without dead ends: 2805 [2022-03-18 02:34:32,565 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 981 GetRequests, 905 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2603, Invalid=3403, Unknown=0, NotChecked=0, Total=6006 [2022-03-18 02:34:32,566 INFO L912 BasicCegarLoop]: 104 mSDtfsCounter, 97 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 02:34:32,566 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 390 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 02:34:32,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2805 states. [2022-03-18 02:34:33,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2805 to 2803. [2022-03-18 02:34:33,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2803 states, 1821 states have (on average 1.0955518945634266) internal successors, (1995), 1886 states have internal predecessors, (1995), 640 states have call successors, (640), 342 states have call predecessors, (640), 341 states have return successors, (637), 574 states have call predecessors, (637), 637 states have call successors, (637) [2022-03-18 02:34:33,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2803 states to 2803 states and 3272 transitions. [2022-03-18 02:34:33,422 INFO L78 Accepts]: Start accepts. Automaton has 2803 states and 3272 transitions. Word has length 479 [2022-03-18 02:34:33,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:34:33,422 INFO L478 AbstractCegarLoop]: Abstraction has 2803 states and 3272 transitions. [2022-03-18 02:34:33,423 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.428571428571429) internal successors, (180), 27 states have internal predecessors, (180), 27 states have call successors, (77), 27 states have call predecessors, (77), 25 states have return successors, (75), 25 states have call predecessors, (75), 26 states have call successors, (75) [2022-03-18 02:34:33,423 INFO L276 IsEmpty]: Start isEmpty. Operand 2803 states and 3272 transitions. [2022-03-18 02:34:33,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2022-03-18 02:34:33,429 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:34:33,429 INFO L500 BasicCegarLoop]: trace histogram [76, 75, 75, 26, 25, 25, 25, 25, 25, 25, 25, 25, 25, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:34:33,450 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-03-18 02:34:33,630 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:34:33,630 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:34:33,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:34:33,630 INFO L85 PathProgramCache]: Analyzing trace with hash -695639662, now seen corresponding path program 49 times [2022-03-18 02:34:33,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:33,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1075015967] [2022-03-18 02:34:33,631 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:34:33,631 INFO L85 PathProgramCache]: Analyzing trace with hash -695639662, now seen corresponding path program 50 times [2022-03-18 02:34:33,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:34:33,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925952642] [2022-03-18 02:34:33,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:34:33,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:34:33,640 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:34:33,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [372478114] [2022-03-18 02:34:33,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:34:33,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:34:33,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:34:33,642 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:34:33,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-18 02:34:33,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:34:33,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:34:33,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 1099 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-18 02:34:33,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:34:34,739 INFO L134 CoverageAnalysis]: Checked inductivity of 13404 backedges. 150 proven. 12950 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2022-03-18 02:34:34,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:34:36,077 INFO L134 CoverageAnalysis]: Checked inductivity of 13404 backedges. 150 proven. 2150 refuted. 0 times theorem prover too weak. 11104 trivial. 0 not checked. [2022-03-18 02:34:36,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:34:36,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925952642] [2022-03-18 02:34:36,077 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:34:36,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372478114] [2022-03-18 02:34:36,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372478114] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:34:36,078 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:34:36,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 54 [2022-03-18 02:34:36,078 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:34:36,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1075015967] [2022-03-18 02:34:36,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1075015967] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:34:36,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:34:36,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-18 02:34:36,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285728383] [2022-03-18 02:34:36,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:34:36,079 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-18 02:34:36,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:36,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-18 02:34:36,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-18 02:34:36,080 INFO L87 Difference]: Start difference. First operand 2803 states and 3272 transitions. Second operand has 29 states, 29 states have (on average 6.448275862068965) internal successors, (187), 28 states have internal predecessors, (187), 28 states have call successors, (80), 28 states have call predecessors, (80), 26 states have return successors, (78), 26 states have call predecessors, (78), 27 states have call successors, (78) [2022-03-18 02:34:37,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:34:37,527 INFO L93 Difference]: Finished difference Result 2932 states and 3433 transitions. [2022-03-18 02:34:37,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-18 02:34:37,528 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 6.448275862068965) internal successors, (187), 28 states have internal predecessors, (187), 28 states have call successors, (80), 28 states have call predecessors, (80), 26 states have return successors, (78), 26 states have call predecessors, (78), 27 states have call successors, (78) Word has length 498 [2022-03-18 02:34:37,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:34:37,535 INFO L225 Difference]: With dead ends: 2932 [2022-03-18 02:34:37,536 INFO L226 Difference]: Without dead ends: 2923 [2022-03-18 02:34:37,537 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1020 GetRequests, 942 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2656, Invalid=3506, Unknown=0, NotChecked=0, Total=6162 [2022-03-18 02:34:37,538 INFO L912 BasicCegarLoop]: 107 mSDtfsCounter, 66 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 02:34:37,538 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 432 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 02:34:37,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2923 states. [2022-03-18 02:34:38,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2923 to 2921. [2022-03-18 02:34:38,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2921 states, 1897 states have (on average 1.09541381128097) internal successors, (2078), 1965 states have internal predecessors, (2078), 668 states have call successors, (668), 356 states have call predecessors, (668), 355 states have return successors, (665), 599 states have call predecessors, (665), 665 states have call successors, (665) [2022-03-18 02:34:38,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2921 states to 2921 states and 3411 transitions. [2022-03-18 02:34:38,315 INFO L78 Accepts]: Start accepts. Automaton has 2921 states and 3411 transitions. Word has length 498 [2022-03-18 02:34:38,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:34:38,316 INFO L478 AbstractCegarLoop]: Abstraction has 2921 states and 3411 transitions. [2022-03-18 02:34:38,316 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 6.448275862068965) internal successors, (187), 28 states have internal predecessors, (187), 28 states have call successors, (80), 28 states have call predecessors, (80), 26 states have return successors, (78), 26 states have call predecessors, (78), 27 states have call successors, (78) [2022-03-18 02:34:38,316 INFO L276 IsEmpty]: Start isEmpty. Operand 2921 states and 3411 transitions. [2022-03-18 02:34:38,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 518 [2022-03-18 02:34:38,323 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:34:38,323 INFO L500 BasicCegarLoop]: trace histogram [79, 78, 78, 27, 26, 26, 26, 26, 26, 26, 26, 26, 26, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:34:38,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-18 02:34:38,524 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:34:38,524 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:34:38,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:34:38,524 INFO L85 PathProgramCache]: Analyzing trace with hash 642972097, now seen corresponding path program 51 times [2022-03-18 02:34:38,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:38,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [832283025] [2022-03-18 02:34:38,525 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:34:38,525 INFO L85 PathProgramCache]: Analyzing trace with hash 642972097, now seen corresponding path program 52 times [2022-03-18 02:34:38,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:34:38,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542324338] [2022-03-18 02:34:38,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:34:38,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:34:38,537 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:34:38,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [83153010] [2022-03-18 02:34:38,537 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:34:38,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:34:38,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:34:38,539 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:34:38,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-18 02:34:38,692 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:34:38,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:34:38,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 1139 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-18 02:34:38,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:34:39,724 INFO L134 CoverageAnalysis]: Checked inductivity of 14499 backedges. 156 proven. 14027 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-03-18 02:34:39,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:34:41,075 INFO L134 CoverageAnalysis]: Checked inductivity of 14499 backedges. 156 proven. 2327 refuted. 0 times theorem prover too weak. 12016 trivial. 0 not checked. [2022-03-18 02:34:41,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:34:41,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542324338] [2022-03-18 02:34:41,076 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:34:41,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83153010] [2022-03-18 02:34:41,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83153010] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:34:41,076 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:34:41,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 54 [2022-03-18 02:34:41,076 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:34:41,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [832283025] [2022-03-18 02:34:41,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [832283025] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:34:41,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:34:41,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-03-18 02:34:41,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147228097] [2022-03-18 02:34:41,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:34:41,077 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-18 02:34:41,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:41,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-18 02:34:41,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-18 02:34:41,078 INFO L87 Difference]: Start difference. First operand 2921 states and 3411 transitions. Second operand has 30 states, 30 states have (on average 6.466666666666667) internal successors, (194), 29 states have internal predecessors, (194), 29 states have call successors, (83), 29 states have call predecessors, (83), 27 states have return successors, (81), 27 states have call predecessors, (81), 28 states have call successors, (81) [2022-03-18 02:34:42,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:34:42,554 INFO L93 Difference]: Finished difference Result 3050 states and 3572 transitions. [2022-03-18 02:34:42,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-18 02:34:42,555 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 6.466666666666667) internal successors, (194), 29 states have internal predecessors, (194), 29 states have call successors, (83), 29 states have call predecessors, (83), 27 states have return successors, (81), 27 states have call predecessors, (81), 28 states have call successors, (81) Word has length 517 [2022-03-18 02:34:42,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:34:42,563 INFO L225 Difference]: With dead ends: 3050 [2022-03-18 02:34:42,563 INFO L226 Difference]: Without dead ends: 3041 [2022-03-18 02:34:42,564 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1059 GetRequests, 980 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2709, Invalid=3611, Unknown=0, NotChecked=0, Total=6320 [2022-03-18 02:34:42,565 INFO L912 BasicCegarLoop]: 110 mSDtfsCounter, 127 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 02:34:42,565 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 414 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 02:34:42,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3041 states. [2022-03-18 02:34:43,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3041 to 3039. [2022-03-18 02:34:43,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3039 states, 1973 states have (on average 1.0952863659401926) internal successors, (2161), 2044 states have internal predecessors, (2161), 696 states have call successors, (696), 370 states have call predecessors, (696), 369 states have return successors, (693), 624 states have call predecessors, (693), 693 states have call successors, (693) [2022-03-18 02:34:43,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3039 states to 3039 states and 3550 transitions. [2022-03-18 02:34:43,437 INFO L78 Accepts]: Start accepts. Automaton has 3039 states and 3550 transitions. Word has length 517 [2022-03-18 02:34:43,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:34:43,438 INFO L478 AbstractCegarLoop]: Abstraction has 3039 states and 3550 transitions. [2022-03-18 02:34:43,438 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.466666666666667) internal successors, (194), 29 states have internal predecessors, (194), 29 states have call successors, (83), 29 states have call predecessors, (83), 27 states have return successors, (81), 27 states have call predecessors, (81), 28 states have call successors, (81) [2022-03-18 02:34:43,438 INFO L276 IsEmpty]: Start isEmpty. Operand 3039 states and 3550 transitions. [2022-03-18 02:34:43,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 537 [2022-03-18 02:34:43,446 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:34:43,446 INFO L500 BasicCegarLoop]: trace histogram [82, 81, 81, 28, 27, 27, 27, 27, 27, 27, 27, 27, 27, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:34:43,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-18 02:34:43,647 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:34:43,647 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:34:43,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:34:43,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1709751602, now seen corresponding path program 53 times [2022-03-18 02:34:43,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:43,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [477558030] [2022-03-18 02:34:43,648 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:34:43,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1709751602, now seen corresponding path program 54 times [2022-03-18 02:34:43,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:34:43,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054539520] [2022-03-18 02:34:43,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:34:43,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:34:43,661 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:34:43,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1384215931] [2022-03-18 02:34:43,662 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:34:43,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:34:43,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:34:43,663 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:34:43,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-18 02:34:44,100 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2022-03-18 02:34:44,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:34:44,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 1152 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-18 02:34:44,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:34:45,145 INFO L134 CoverageAnalysis]: Checked inductivity of 15637 backedges. 162 proven. 15147 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2022-03-18 02:34:45,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:34:46,477 INFO L134 CoverageAnalysis]: Checked inductivity of 15637 backedges. 162 proven. 2511 refuted. 0 times theorem prover too weak. 12964 trivial. 0 not checked. [2022-03-18 02:34:46,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:34:46,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054539520] [2022-03-18 02:34:46,477 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:34:46,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384215931] [2022-03-18 02:34:46,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384215931] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:34:46,477 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:34:46,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 54 [2022-03-18 02:34:46,478 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:34:46,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [477558030] [2022-03-18 02:34:46,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [477558030] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:34:46,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:34:46,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-03-18 02:34:46,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104072150] [2022-03-18 02:34:46,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:34:46,479 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-18 02:34:46,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:46,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-18 02:34:46,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-18 02:34:46,480 INFO L87 Difference]: Start difference. First operand 3039 states and 3550 transitions. Second operand has 31 states, 31 states have (on average 6.483870967741935) internal successors, (201), 30 states have internal predecessors, (201), 30 states have call successors, (86), 30 states have call predecessors, (86), 28 states have return successors, (84), 28 states have call predecessors, (84), 29 states have call successors, (84) [2022-03-18 02:34:48,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:34:48,100 INFO L93 Difference]: Finished difference Result 3168 states and 3711 transitions. [2022-03-18 02:34:48,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-18 02:34:48,101 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 6.483870967741935) internal successors, (201), 30 states have internal predecessors, (201), 30 states have call successors, (86), 30 states have call predecessors, (86), 28 states have return successors, (84), 28 states have call predecessors, (84), 29 states have call successors, (84) Word has length 536 [2022-03-18 02:34:48,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:34:48,110 INFO L225 Difference]: With dead ends: 3168 [2022-03-18 02:34:48,110 INFO L226 Difference]: Without dead ends: 3159 [2022-03-18 02:34:48,112 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1098 GetRequests, 1018 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2762, Invalid=3718, Unknown=0, NotChecked=0, Total=6480 [2022-03-18 02:34:48,112 INFO L912 BasicCegarLoop]: 113 mSDtfsCounter, 74 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 02:34:48,113 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 476 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 02:34:48,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3159 states. [2022-03-18 02:34:49,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3159 to 3157. [2022-03-18 02:34:49,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3157 states, 2049 states have (on average 1.0951683748169838) internal successors, (2244), 2123 states have internal predecessors, (2244), 724 states have call successors, (724), 384 states have call predecessors, (724), 383 states have return successors, (721), 649 states have call predecessors, (721), 721 states have call successors, (721) [2022-03-18 02:34:49,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3157 states to 3157 states and 3689 transitions. [2022-03-18 02:34:49,132 INFO L78 Accepts]: Start accepts. Automaton has 3157 states and 3689 transitions. Word has length 536 [2022-03-18 02:34:49,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:34:49,132 INFO L478 AbstractCegarLoop]: Abstraction has 3157 states and 3689 transitions. [2022-03-18 02:34:49,133 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 6.483870967741935) internal successors, (201), 30 states have internal predecessors, (201), 30 states have call successors, (86), 30 states have call predecessors, (86), 28 states have return successors, (84), 28 states have call predecessors, (84), 29 states have call successors, (84) [2022-03-18 02:34:49,133 INFO L276 IsEmpty]: Start isEmpty. Operand 3157 states and 3689 transitions. [2022-03-18 02:34:49,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 556 [2022-03-18 02:34:49,139 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:34:49,139 INFO L500 BasicCegarLoop]: trace histogram [85, 84, 84, 29, 28, 28, 28, 28, 28, 28, 28, 28, 28, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:34:49,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-03-18 02:34:49,339 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-03-18 02:34:49,340 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:34:49,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:34:49,340 INFO L85 PathProgramCache]: Analyzing trace with hash 284015137, now seen corresponding path program 55 times [2022-03-18 02:34:49,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:49,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [636011205] [2022-03-18 02:34:49,341 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:34:49,341 INFO L85 PathProgramCache]: Analyzing trace with hash 284015137, now seen corresponding path program 56 times [2022-03-18 02:34:49,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:34:49,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400073124] [2022-03-18 02:34:49,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:34:49,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:34:49,353 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:34:49,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1899313389] [2022-03-18 02:34:49,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:34:49,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:34:49,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:34:49,355 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:34:49,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-18 02:34:49,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:34:49,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:34:49,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 1219 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-18 02:34:49,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:34:50,597 INFO L134 CoverageAnalysis]: Checked inductivity of 16818 backedges. 168 proven. 16310 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2022-03-18 02:34:50,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:34:52,110 INFO L134 CoverageAnalysis]: Checked inductivity of 16818 backedges. 168 proven. 2702 refuted. 0 times theorem prover too weak. 13948 trivial. 0 not checked. [2022-03-18 02:34:52,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:34:52,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400073124] [2022-03-18 02:34:52,111 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:34:52,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899313389] [2022-03-18 02:34:52,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899313389] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:34:52,111 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:34:52,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 54 [2022-03-18 02:34:52,111 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:34:52,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [636011205] [2022-03-18 02:34:52,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [636011205] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:34:52,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:34:52,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-03-18 02:34:52,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004741503] [2022-03-18 02:34:52,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:34:52,112 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-18 02:34:52,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:52,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-18 02:34:52,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-18 02:34:52,113 INFO L87 Difference]: Start difference. First operand 3157 states and 3689 transitions. Second operand has 32 states, 32 states have (on average 6.5) internal successors, (208), 31 states have internal predecessors, (208), 31 states have call successors, (89), 31 states have call predecessors, (89), 29 states have return successors, (87), 29 states have call predecessors, (87), 30 states have call successors, (87) [2022-03-18 02:34:53,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:34:53,865 INFO L93 Difference]: Finished difference Result 3286 states and 3850 transitions. [2022-03-18 02:34:53,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-18 02:34:53,865 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 6.5) internal successors, (208), 31 states have internal predecessors, (208), 31 states have call successors, (89), 31 states have call predecessors, (89), 29 states have return successors, (87), 29 states have call predecessors, (87), 30 states have call successors, (87) Word has length 555 [2022-03-18 02:34:53,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:34:53,873 INFO L225 Difference]: With dead ends: 3286 [2022-03-18 02:34:53,873 INFO L226 Difference]: Without dead ends: 3277 [2022-03-18 02:34:53,875 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1137 GetRequests, 1056 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2815, Invalid=3827, Unknown=0, NotChecked=0, Total=6642 [2022-03-18 02:34:53,875 INFO L912 BasicCegarLoop]: 116 mSDtfsCounter, 71 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 02:34:53,875 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 488 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 02:34:53,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3277 states. [2022-03-18 02:34:54,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3277 to 3275. [2022-03-18 02:34:54,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3275 states, 2125 states have (on average 1.0950588235294119) internal successors, (2327), 2202 states have internal predecessors, (2327), 752 states have call successors, (752), 398 states have call predecessors, (752), 397 states have return successors, (749), 674 states have call predecessors, (749), 749 states have call successors, (749) [2022-03-18 02:34:54,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3275 states to 3275 states and 3828 transitions. [2022-03-18 02:34:54,770 INFO L78 Accepts]: Start accepts. Automaton has 3275 states and 3828 transitions. Word has length 555 [2022-03-18 02:34:54,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:34:54,770 INFO L478 AbstractCegarLoop]: Abstraction has 3275 states and 3828 transitions. [2022-03-18 02:34:54,770 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 6.5) internal successors, (208), 31 states have internal predecessors, (208), 31 states have call successors, (89), 31 states have call predecessors, (89), 29 states have return successors, (87), 29 states have call predecessors, (87), 30 states have call successors, (87) [2022-03-18 02:34:54,770 INFO L276 IsEmpty]: Start isEmpty. Operand 3275 states and 3828 transitions. [2022-03-18 02:34:54,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 575 [2022-03-18 02:34:54,777 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:34:54,777 INFO L500 BasicCegarLoop]: trace histogram [88, 87, 87, 30, 29, 29, 29, 29, 29, 29, 29, 29, 29, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:34:54,796 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-03-18 02:34:54,978 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-03-18 02:34:54,978 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:34:54,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:34:54,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1854300370, now seen corresponding path program 57 times [2022-03-18 02:34:54,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:54,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1689574417] [2022-03-18 02:34:54,979 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:34:54,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1854300370, now seen corresponding path program 58 times [2022-03-18 02:34:54,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:34:54,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498281272] [2022-03-18 02:34:54,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:34:54,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:34:54,992 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:34:54,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [520481925] [2022-03-18 02:34:54,993 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:34:54,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:34:54,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:34:54,994 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:34:54,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-18 02:34:55,166 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:34:55,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:34:55,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 1259 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-18 02:34:55,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:34:56,297 INFO L134 CoverageAnalysis]: Checked inductivity of 18042 backedges. 174 proven. 17516 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2022-03-18 02:34:56,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:34:57,636 INFO L134 CoverageAnalysis]: Checked inductivity of 18042 backedges. 174 proven. 2900 refuted. 0 times theorem prover too weak. 14968 trivial. 0 not checked. [2022-03-18 02:34:57,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:34:57,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498281272] [2022-03-18 02:34:57,636 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:34:57,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520481925] [2022-03-18 02:34:57,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520481925] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:34:57,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:34:57,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 54 [2022-03-18 02:34:57,637 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:34:57,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1689574417] [2022-03-18 02:34:57,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1689574417] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:34:57,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:34:57,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-03-18 02:34:57,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035881330] [2022-03-18 02:34:57,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:34:57,638 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-18 02:34:57,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:57,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-18 02:34:57,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-18 02:34:57,639 INFO L87 Difference]: Start difference. First operand 3275 states and 3828 transitions. Second operand has 33 states, 33 states have (on average 6.515151515151516) internal successors, (215), 32 states have internal predecessors, (215), 32 states have call successors, (92), 32 states have call predecessors, (92), 30 states have return successors, (90), 30 states have call predecessors, (90), 31 states have call successors, (90) [2022-03-18 02:34:59,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:34:59,385 INFO L93 Difference]: Finished difference Result 3404 states and 3989 transitions. [2022-03-18 02:34:59,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-18 02:34:59,386 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 6.515151515151516) internal successors, (215), 32 states have internal predecessors, (215), 32 states have call successors, (92), 32 states have call predecessors, (92), 30 states have return successors, (90), 30 states have call predecessors, (90), 31 states have call successors, (90) Word has length 574 [2022-03-18 02:34:59,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:34:59,395 INFO L225 Difference]: With dead ends: 3404 [2022-03-18 02:34:59,395 INFO L226 Difference]: Without dead ends: 3395 [2022-03-18 02:34:59,396 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1176 GetRequests, 1094 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2868, Invalid=3938, Unknown=0, NotChecked=0, Total=6806 [2022-03-18 02:34:59,396 INFO L912 BasicCegarLoop]: 119 mSDtfsCounter, 96 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 02:34:59,396 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 460 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 02:34:59,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3395 states. [2022-03-18 02:35:00,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3395 to 3393. [2022-03-18 02:35:00,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3393 states, 2201 states have (on average 1.0949568378009995) internal successors, (2410), 2281 states have internal predecessors, (2410), 780 states have call successors, (780), 412 states have call predecessors, (780), 411 states have return successors, (777), 699 states have call predecessors, (777), 777 states have call successors, (777) [2022-03-18 02:35:00,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3393 states to 3393 states and 3967 transitions. [2022-03-18 02:35:00,318 INFO L78 Accepts]: Start accepts. Automaton has 3393 states and 3967 transitions. Word has length 574 [2022-03-18 02:35:00,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:35:00,318 INFO L478 AbstractCegarLoop]: Abstraction has 3393 states and 3967 transitions. [2022-03-18 02:35:00,318 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 6.515151515151516) internal successors, (215), 32 states have internal predecessors, (215), 32 states have call successors, (92), 32 states have call predecessors, (92), 30 states have return successors, (90), 30 states have call predecessors, (90), 31 states have call successors, (90) [2022-03-18 02:35:00,318 INFO L276 IsEmpty]: Start isEmpty. Operand 3393 states and 3967 transitions. [2022-03-18 02:35:00,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 594 [2022-03-18 02:35:00,328 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:35:00,328 INFO L500 BasicCegarLoop]: trace histogram [91, 90, 90, 31, 30, 30, 30, 30, 30, 30, 30, 30, 30, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:35:00,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-03-18 02:35:00,531 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:35:00,531 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:35:00,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:35:00,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1372926593, now seen corresponding path program 59 times [2022-03-18 02:35:00,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:35:00,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [380473159] [2022-03-18 02:35:00,532 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:35:00,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1372926593, now seen corresponding path program 60 times [2022-03-18 02:35:00,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:35:00,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882047214] [2022-03-18 02:35:00,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:35:00,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:35:00,542 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:35:00,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [991311446] [2022-03-18 02:35:00,543 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:35:00,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:35:00,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:35:00,545 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:35:00,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-18 02:36:21,644 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 57 check-sat command(s) [2022-03-18 02:36:21,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:36:21,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 1272 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-18 02:36:21,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:36:22,931 INFO L134 CoverageAnalysis]: Checked inductivity of 19309 backedges. 180 proven. 18765 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-03-18 02:36:22,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:36:24,322 INFO L134 CoverageAnalysis]: Checked inductivity of 19309 backedges. 180 proven. 3105 refuted. 0 times theorem prover too weak. 16024 trivial. 0 not checked. [2022-03-18 02:36:24,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:36:24,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882047214] [2022-03-18 02:36:24,322 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:36:24,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991311446] [2022-03-18 02:36:24,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991311446] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:36:24,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:36:24,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 54 [2022-03-18 02:36:24,323 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:36:24,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [380473159] [2022-03-18 02:36:24,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [380473159] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:36:24,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:36:24,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-03-18 02:36:24,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902908554] [2022-03-18 02:36:24,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:36:24,323 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-18 02:36:24,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:36:24,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-18 02:36:24,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-18 02:36:24,324 INFO L87 Difference]: Start difference. First operand 3393 states and 3967 transitions. Second operand has 34 states, 34 states have (on average 6.529411764705882) internal successors, (222), 33 states have internal predecessors, (222), 33 states have call successors, (95), 33 states have call predecessors, (95), 31 states have return successors, (93), 31 states have call predecessors, (93), 32 states have call successors, (93) [2022-03-18 02:36:26,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:36:26,255 INFO L93 Difference]: Finished difference Result 3522 states and 4128 transitions. [2022-03-18 02:36:26,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-18 02:36:26,258 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 6.529411764705882) internal successors, (222), 33 states have internal predecessors, (222), 33 states have call successors, (95), 33 states have call predecessors, (95), 31 states have return successors, (93), 31 states have call predecessors, (93), 32 states have call successors, (93) Word has length 593 [2022-03-18 02:36:26,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:36:26,266 INFO L225 Difference]: With dead ends: 3522 [2022-03-18 02:36:26,266 INFO L226 Difference]: Without dead ends: 3513 [2022-03-18 02:36:26,268 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1215 GetRequests, 1132 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2921, Invalid=4051, Unknown=0, NotChecked=0, Total=6972 [2022-03-18 02:36:26,268 INFO L912 BasicCegarLoop]: 122 mSDtfsCounter, 113 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 02:36:26,268 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 482 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 02:36:26,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3513 states. [2022-03-18 02:36:27,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3513 to 3511. [2022-03-18 02:36:27,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3511 states, 2277 states have (on average 1.0948616600790513) internal successors, (2493), 2360 states have internal predecessors, (2493), 808 states have call successors, (808), 426 states have call predecessors, (808), 425 states have return successors, (805), 724 states have call predecessors, (805), 805 states have call successors, (805) [2022-03-18 02:36:27,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3511 states to 3511 states and 4106 transitions. [2022-03-18 02:36:27,238 INFO L78 Accepts]: Start accepts. Automaton has 3511 states and 4106 transitions. Word has length 593 [2022-03-18 02:36:27,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:36:27,239 INFO L478 AbstractCegarLoop]: Abstraction has 3511 states and 4106 transitions. [2022-03-18 02:36:27,239 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 6.529411764705882) internal successors, (222), 33 states have internal predecessors, (222), 33 states have call successors, (95), 33 states have call predecessors, (95), 31 states have return successors, (93), 31 states have call predecessors, (93), 32 states have call successors, (93) [2022-03-18 02:36:27,239 INFO L276 IsEmpty]: Start isEmpty. Operand 3511 states and 4106 transitions. [2022-03-18 02:36:27,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 613 [2022-03-18 02:36:27,246 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:36:27,246 INFO L500 BasicCegarLoop]: trace histogram [94, 93, 93, 32, 31, 31, 31, 31, 31, 31, 31, 31, 31, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:36:27,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-03-18 02:36:27,447 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:36:27,447 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:36:27,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:36:27,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1466715250, now seen corresponding path program 61 times [2022-03-18 02:36:27,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:36:27,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1513479911] [2022-03-18 02:36:27,448 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:36:27,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1466715250, now seen corresponding path program 62 times [2022-03-18 02:36:27,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:36:27,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422410869] [2022-03-18 02:36:27,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:36:27,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:36:27,458 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:36:27,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2104156826] [2022-03-18 02:36:27,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:36:27,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:36:27,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:36:27,460 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:36:27,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-18 02:36:27,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:36:27,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:36:27,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 1339 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-18 02:36:27,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:36:28,951 INFO L134 CoverageAnalysis]: Checked inductivity of 20619 backedges. 186 proven. 20057 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2022-03-18 02:36:28,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:36:30,305 INFO L134 CoverageAnalysis]: Checked inductivity of 20619 backedges. 186 proven. 3317 refuted. 0 times theorem prover too weak. 17116 trivial. 0 not checked. [2022-03-18 02:36:30,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:36:30,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422410869] [2022-03-18 02:36:30,305 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:36:30,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104156826] [2022-03-18 02:36:30,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104156826] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:36:30,306 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:36:30,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 54 [2022-03-18 02:36:30,306 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:36:30,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1513479911] [2022-03-18 02:36:30,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1513479911] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:36:30,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:36:30,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-03-18 02:36:30,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212295164] [2022-03-18 02:36:30,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:36:30,307 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-18 02:36:30,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:36:30,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-18 02:36:30,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-18 02:36:30,308 INFO L87 Difference]: Start difference. First operand 3511 states and 4106 transitions. Second operand has 35 states, 35 states have (on average 6.542857142857143) internal successors, (229), 34 states have internal predecessors, (229), 34 states have call successors, (98), 34 states have call predecessors, (98), 32 states have return successors, (96), 32 states have call predecessors, (96), 33 states have call successors, (96) [2022-03-18 02:36:32,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:36:32,111 INFO L93 Difference]: Finished difference Result 3640 states and 4267 transitions. [2022-03-18 02:36:32,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-18 02:36:32,112 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 6.542857142857143) internal successors, (229), 34 states have internal predecessors, (229), 34 states have call successors, (98), 34 states have call predecessors, (98), 32 states have return successors, (96), 32 states have call predecessors, (96), 33 states have call successors, (96) Word has length 612 [2022-03-18 02:36:32,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:36:32,120 INFO L225 Difference]: With dead ends: 3640 [2022-03-18 02:36:32,120 INFO L226 Difference]: Without dead ends: 3631 [2022-03-18 02:36:32,122 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1254 GetRequests, 1170 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2974, Invalid=4166, Unknown=0, NotChecked=0, Total=7140 [2022-03-18 02:36:32,122 INFO L912 BasicCegarLoop]: 125 mSDtfsCounter, 118 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 02:36:32,122 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 494 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 02:36:32,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3631 states. [2022-03-18 02:36:33,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3631 to 3629. [2022-03-18 02:36:33,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3629 states, 2353 states have (on average 1.094772630684233) internal successors, (2576), 2439 states have internal predecessors, (2576), 836 states have call successors, (836), 440 states have call predecessors, (836), 439 states have return successors, (833), 749 states have call predecessors, (833), 833 states have call successors, (833) [2022-03-18 02:36:33,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3629 states to 3629 states and 4245 transitions. [2022-03-18 02:36:33,152 INFO L78 Accepts]: Start accepts. Automaton has 3629 states and 4245 transitions. Word has length 612 [2022-03-18 02:36:33,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:36:33,152 INFO L478 AbstractCegarLoop]: Abstraction has 3629 states and 4245 transitions. [2022-03-18 02:36:33,153 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 6.542857142857143) internal successors, (229), 34 states have internal predecessors, (229), 34 states have call successors, (98), 34 states have call predecessors, (98), 32 states have return successors, (96), 32 states have call predecessors, (96), 33 states have call successors, (96) [2022-03-18 02:36:33,153 INFO L276 IsEmpty]: Start isEmpty. Operand 3629 states and 4245 transitions. [2022-03-18 02:36:33,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 632 [2022-03-18 02:36:33,159 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:36:33,160 INFO L500 BasicCegarLoop]: trace histogram [97, 96, 96, 33, 32, 32, 32, 32, 32, 32, 32, 32, 32, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:36:33,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-03-18 02:36:33,360 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:36:33,361 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:36:33,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:36:33,361 INFO L85 PathProgramCache]: Analyzing trace with hash -2118163743, now seen corresponding path program 63 times [2022-03-18 02:36:33,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:36:33,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1165351133] [2022-03-18 02:36:33,362 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:36:33,362 INFO L85 PathProgramCache]: Analyzing trace with hash -2118163743, now seen corresponding path program 64 times [2022-03-18 02:36:33,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:36:33,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127295386] [2022-03-18 02:36:33,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:36:33,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:36:33,372 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:36:33,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [898496655] [2022-03-18 02:36:33,372 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:36:33,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:36:33,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:36:33,374 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:36:33,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-18 02:36:33,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:36:33,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:36:33,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 1379 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-18 02:36:33,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:36:34,818 INFO L134 CoverageAnalysis]: Checked inductivity of 21972 backedges. 192 proven. 21392 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2022-03-18 02:36:34,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:36:36,143 INFO L134 CoverageAnalysis]: Checked inductivity of 21972 backedges. 192 proven. 3536 refuted. 0 times theorem prover too weak. 18244 trivial. 0 not checked. [2022-03-18 02:36:36,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:36:36,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127295386] [2022-03-18 02:36:36,143 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:36:36,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898496655] [2022-03-18 02:36:36,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898496655] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:36:36,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:36:36,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 54 [2022-03-18 02:36:36,144 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:36:36,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1165351133] [2022-03-18 02:36:36,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1165351133] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:36:36,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:36:36,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-03-18 02:36:36,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293054856] [2022-03-18 02:36:36,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:36:36,145 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-18 02:36:36,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:36:36,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-18 02:36:36,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-18 02:36:36,148 INFO L87 Difference]: Start difference. First operand 3629 states and 4245 transitions. Second operand has 36 states, 36 states have (on average 6.555555555555555) internal successors, (236), 35 states have internal predecessors, (236), 35 states have call successors, (101), 35 states have call predecessors, (101), 33 states have return successors, (99), 33 states have call predecessors, (99), 34 states have call successors, (99) [2022-03-18 02:36:37,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:36:37,930 INFO L93 Difference]: Finished difference Result 3758 states and 4406 transitions. [2022-03-18 02:36:37,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-18 02:36:37,931 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 6.555555555555555) internal successors, (236), 35 states have internal predecessors, (236), 35 states have call successors, (101), 35 states have call predecessors, (101), 33 states have return successors, (99), 33 states have call predecessors, (99), 34 states have call successors, (99) Word has length 631 [2022-03-18 02:36:37,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:36:37,940 INFO L225 Difference]: With dead ends: 3758 [2022-03-18 02:36:37,941 INFO L226 Difference]: Without dead ends: 3749 [2022-03-18 02:36:37,942 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1293 GetRequests, 1208 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3027, Invalid=4283, Unknown=0, NotChecked=0, Total=7310 [2022-03-18 02:36:37,942 INFO L912 BasicCegarLoop]: 128 mSDtfsCounter, 111 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 02:36:37,943 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 496 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 02:36:37,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3749 states. [2022-03-18 02:36:39,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3749 to 3747. [2022-03-18 02:36:39,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3747 states, 2429 states have (on average 1.0946891724989707) internal successors, (2659), 2518 states have internal predecessors, (2659), 864 states have call successors, (864), 454 states have call predecessors, (864), 453 states have return successors, (861), 774 states have call predecessors, (861), 861 states have call successors, (861) [2022-03-18 02:36:39,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3747 states to 3747 states and 4384 transitions. [2022-03-18 02:36:39,025 INFO L78 Accepts]: Start accepts. Automaton has 3747 states and 4384 transitions. Word has length 631 [2022-03-18 02:36:39,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:36:39,025 INFO L478 AbstractCegarLoop]: Abstraction has 3747 states and 4384 transitions. [2022-03-18 02:36:39,025 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 6.555555555555555) internal successors, (236), 35 states have internal predecessors, (236), 35 states have call successors, (101), 35 states have call predecessors, (101), 33 states have return successors, (99), 33 states have call predecessors, (99), 34 states have call successors, (99) [2022-03-18 02:36:39,025 INFO L276 IsEmpty]: Start isEmpty. Operand 3747 states and 4384 transitions. [2022-03-18 02:36:39,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 651 [2022-03-18 02:36:39,032 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:36:39,032 INFO L500 BasicCegarLoop]: trace histogram [100, 99, 99, 34, 33, 33, 33, 33, 33, 33, 33, 33, 33, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:36:39,050 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-03-18 02:36:39,232 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:36:39,233 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:36:39,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:36:39,233 INFO L85 PathProgramCache]: Analyzing trace with hash -266043374, now seen corresponding path program 65 times [2022-03-18 02:36:39,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:36:39,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [411285270] [2022-03-18 02:36:39,234 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:36:39,234 INFO L85 PathProgramCache]: Analyzing trace with hash -266043374, now seen corresponding path program 66 times [2022-03-18 02:36:39,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:36:39,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887906724] [2022-03-18 02:36:39,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:36:39,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:36:39,244 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:36:39,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [851354027] [2022-03-18 02:36:39,244 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:36:39,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:36:39,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:36:39,246 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:36:39,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-18 02:36:39,797 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 62 check-sat command(s) [2022-03-18 02:36:39,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:36:39,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 1410 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-18 02:36:39,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:36:41,101 INFO L134 CoverageAnalysis]: Checked inductivity of 23368 backedges. 198 proven. 22770 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-03-18 02:36:41,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:36:42,443 INFO L134 CoverageAnalysis]: Checked inductivity of 23368 backedges. 198 proven. 3762 refuted. 0 times theorem prover too weak. 19408 trivial. 0 not checked. [2022-03-18 02:36:42,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:36:42,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887906724] [2022-03-18 02:36:42,443 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:36:42,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851354027] [2022-03-18 02:36:42,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851354027] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:36:42,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:36:42,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 54 [2022-03-18 02:36:42,444 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:36:42,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [411285270] [2022-03-18 02:36:42,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [411285270] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:36:42,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:36:42,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-03-18 02:36:42,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869958921] [2022-03-18 02:36:42,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:36:42,445 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-18 02:36:42,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:36:42,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-18 02:36:42,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-18 02:36:42,445 INFO L87 Difference]: Start difference. First operand 3747 states and 4384 transitions. Second operand has 37 states, 37 states have (on average 6.5675675675675675) internal successors, (243), 36 states have internal predecessors, (243), 36 states have call successors, (104), 36 states have call predecessors, (104), 34 states have return successors, (102), 34 states have call predecessors, (102), 35 states have call successors, (102) [2022-03-18 02:36:44,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:36:44,354 INFO L93 Difference]: Finished difference Result 3876 states and 4545 transitions. [2022-03-18 02:36:44,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-18 02:36:44,354 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 6.5675675675675675) internal successors, (243), 36 states have internal predecessors, (243), 36 states have call successors, (104), 36 states have call predecessors, (104), 34 states have return successors, (102), 34 states have call predecessors, (102), 35 states have call successors, (102) Word has length 650 [2022-03-18 02:36:44,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:36:44,361 INFO L225 Difference]: With dead ends: 3876 [2022-03-18 02:36:44,361 INFO L226 Difference]: Without dead ends: 3867 [2022-03-18 02:36:44,362 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1332 GetRequests, 1246 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3080, Invalid=4402, Unknown=0, NotChecked=0, Total=7482 [2022-03-18 02:36:44,362 INFO L912 BasicCegarLoop]: 131 mSDtfsCounter, 93 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 02:36:44,362 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 538 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 02:36:44,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3867 states. [2022-03-18 02:36:45,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3867 to 3865. [2022-03-18 02:36:45,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3865 states, 2505 states have (on average 1.0946107784431138) internal successors, (2742), 2597 states have internal predecessors, (2742), 892 states have call successors, (892), 468 states have call predecessors, (892), 467 states have return successors, (889), 799 states have call predecessors, (889), 889 states have call successors, (889) [2022-03-18 02:36:45,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3865 states to 3865 states and 4523 transitions. [2022-03-18 02:36:45,375 INFO L78 Accepts]: Start accepts. Automaton has 3865 states and 4523 transitions. Word has length 650 [2022-03-18 02:36:45,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:36:45,375 INFO L478 AbstractCegarLoop]: Abstraction has 3865 states and 4523 transitions. [2022-03-18 02:36:45,376 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 6.5675675675675675) internal successors, (243), 36 states have internal predecessors, (243), 36 states have call successors, (104), 36 states have call predecessors, (104), 34 states have return successors, (102), 34 states have call predecessors, (102), 35 states have call successors, (102) [2022-03-18 02:36:45,376 INFO L276 IsEmpty]: Start isEmpty. Operand 3865 states and 4523 transitions. [2022-03-18 02:36:45,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 670 [2022-03-18 02:36:45,386 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:36:45,386 INFO L500 BasicCegarLoop]: trace histogram [103, 102, 102, 35, 34, 34, 34, 34, 34, 34, 34, 34, 34, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:36:45,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-03-18 02:36:45,611 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-03-18 02:36:45,611 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:36:45,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:36:45,612 INFO L85 PathProgramCache]: Analyzing trace with hash 14830401, now seen corresponding path program 67 times [2022-03-18 02:36:45,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:36:45,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2076522268] [2022-03-18 02:36:45,612 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:36:45,612 INFO L85 PathProgramCache]: Analyzing trace with hash 14830401, now seen corresponding path program 68 times [2022-03-18 02:36:45,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:36:45,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107919770] [2022-03-18 02:36:45,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:36:45,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:36:45,622 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:36:45,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1527253281] [2022-03-18 02:36:45,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:36:45,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:36:45,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:36:45,624 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:36:45,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-18 02:36:45,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:36:45,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:36:45,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 1459 conjuncts, 73 conjunts are in the unsatisfiable core [2022-03-18 02:36:45,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:36:47,118 INFO L134 CoverageAnalysis]: Checked inductivity of 24807 backedges. 204 proven. 24191 refuted. 0 times theorem prover too weak. 412 trivial. 0 not checked. [2022-03-18 02:36:47,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:36:48,441 INFO L134 CoverageAnalysis]: Checked inductivity of 24807 backedges. 204 proven. 3995 refuted. 0 times theorem prover too weak. 20608 trivial. 0 not checked. [2022-03-18 02:36:48,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:36:48,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107919770] [2022-03-18 02:36:48,441 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:36:48,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527253281] [2022-03-18 02:36:48,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527253281] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:36:48,442 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:36:48,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 54 [2022-03-18 02:36:48,442 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:36:48,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2076522268] [2022-03-18 02:36:48,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2076522268] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:36:48,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:36:48,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-03-18 02:36:48,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142930224] [2022-03-18 02:36:48,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:36:48,443 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-18 02:36:48,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:36:48,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-18 02:36:48,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-18 02:36:48,444 INFO L87 Difference]: Start difference. First operand 3865 states and 4523 transitions. Second operand has 38 states, 38 states have (on average 6.578947368421052) internal successors, (250), 37 states have internal predecessors, (250), 37 states have call successors, (107), 37 states have call predecessors, (107), 35 states have return successors, (105), 35 states have call predecessors, (105), 36 states have call successors, (105) [2022-03-18 02:36:50,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:36:50,358 INFO L93 Difference]: Finished difference Result 3994 states and 4684 transitions. [2022-03-18 02:36:50,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-18 02:36:50,358 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 6.578947368421052) internal successors, (250), 37 states have internal predecessors, (250), 37 states have call successors, (107), 37 states have call predecessors, (107), 35 states have return successors, (105), 35 states have call predecessors, (105), 36 states have call successors, (105) Word has length 669 [2022-03-18 02:36:50,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:36:50,366 INFO L225 Difference]: With dead ends: 3994 [2022-03-18 02:36:50,366 INFO L226 Difference]: Without dead ends: 3985 [2022-03-18 02:36:50,367 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1371 GetRequests, 1284 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3133, Invalid=4523, Unknown=0, NotChecked=0, Total=7656 [2022-03-18 02:36:50,367 INFO L912 BasicCegarLoop]: 134 mSDtfsCounter, 137 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 02:36:50,368 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 520 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 02:36:50,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3985 states. [2022-03-18 02:36:51,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3985 to 3983. [2022-03-18 02:36:51,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3983 states, 2581 states have (on average 1.09453700116234) internal successors, (2825), 2676 states have internal predecessors, (2825), 920 states have call successors, (920), 482 states have call predecessors, (920), 481 states have return successors, (917), 824 states have call predecessors, (917), 917 states have call successors, (917) [2022-03-18 02:36:51,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3983 states to 3983 states and 4662 transitions. [2022-03-18 02:36:51,441 INFO L78 Accepts]: Start accepts. Automaton has 3983 states and 4662 transitions. Word has length 669 [2022-03-18 02:36:51,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:36:51,441 INFO L478 AbstractCegarLoop]: Abstraction has 3983 states and 4662 transitions. [2022-03-18 02:36:51,442 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 6.578947368421052) internal successors, (250), 37 states have internal predecessors, (250), 37 states have call successors, (107), 37 states have call predecessors, (107), 35 states have return successors, (105), 35 states have call predecessors, (105), 36 states have call successors, (105) [2022-03-18 02:36:51,442 INFO L276 IsEmpty]: Start isEmpty. Operand 3983 states and 4662 transitions. [2022-03-18 02:36:51,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 689 [2022-03-18 02:36:51,452 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:36:51,452 INFO L500 BasicCegarLoop]: trace histogram [106, 105, 105, 36, 35, 35, 35, 35, 35, 35, 35, 35, 35, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:36:51,473 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-03-18 02:36:51,659 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:36:51,660 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:36:51,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:36:51,660 INFO L85 PathProgramCache]: Analyzing trace with hash 280558514, now seen corresponding path program 69 times [2022-03-18 02:36:51,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:36:51,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1499624735] [2022-03-18 02:36:51,661 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:36:51,661 INFO L85 PathProgramCache]: Analyzing trace with hash 280558514, now seen corresponding path program 70 times [2022-03-18 02:36:51,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:36:51,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981119783] [2022-03-18 02:36:51,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:36:51,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:36:51,671 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:36:51,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [579834388] [2022-03-18 02:36:51,671 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:36:51,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:36:51,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:36:51,672 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:36:51,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-18 02:36:51,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:36:51,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:36:51,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 75 conjunts are in the unsatisfiable core [2022-03-18 02:36:51,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:36:53,268 INFO L134 CoverageAnalysis]: Checked inductivity of 26289 backedges. 210 proven. 25655 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2022-03-18 02:36:53,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:36:54,598 INFO L134 CoverageAnalysis]: Checked inductivity of 26289 backedges. 210 proven. 4235 refuted. 0 times theorem prover too weak. 21844 trivial. 0 not checked. [2022-03-18 02:36:54,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:36:54,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981119783] [2022-03-18 02:36:54,599 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:36:54,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579834388] [2022-03-18 02:36:54,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579834388] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:36:54,599 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:36:54,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 54 [2022-03-18 02:36:54,599 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:36:54,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1499624735] [2022-03-18 02:36:54,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1499624735] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:36:54,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:36:54,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-03-18 02:36:54,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690232555] [2022-03-18 02:36:54,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:36:54,600 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-18 02:36:54,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:36:54,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-18 02:36:54,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-18 02:36:54,601 INFO L87 Difference]: Start difference. First operand 3983 states and 4662 transitions. Second operand has 39 states, 39 states have (on average 6.589743589743589) internal successors, (257), 38 states have internal predecessors, (257), 38 states have call successors, (110), 38 states have call predecessors, (110), 36 states have return successors, (108), 36 states have call predecessors, (108), 37 states have call successors, (108) [2022-03-18 02:36:56,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:36:56,553 INFO L93 Difference]: Finished difference Result 4112 states and 4823 transitions. [2022-03-18 02:36:56,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-18 02:36:56,554 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 6.589743589743589) internal successors, (257), 38 states have internal predecessors, (257), 38 states have call successors, (110), 38 states have call predecessors, (110), 36 states have return successors, (108), 36 states have call predecessors, (108), 37 states have call successors, (108) Word has length 688 [2022-03-18 02:36:56,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:36:56,562 INFO L225 Difference]: With dead ends: 4112 [2022-03-18 02:36:56,562 INFO L226 Difference]: Without dead ends: 4103 [2022-03-18 02:36:56,563 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1410 GetRequests, 1322 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3186, Invalid=4646, Unknown=0, NotChecked=0, Total=7832 [2022-03-18 02:36:56,565 INFO L912 BasicCegarLoop]: 137 mSDtfsCounter, 132 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 02:36:56,565 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 552 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 02:36:56,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4103 states. [2022-03-18 02:36:57,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4103 to 4101. [2022-03-18 02:36:57,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4101 states, 2657 states have (on average 1.0944674444862628) internal successors, (2908), 2755 states have internal predecessors, (2908), 948 states have call successors, (948), 496 states have call predecessors, (948), 495 states have return successors, (945), 849 states have call predecessors, (945), 945 states have call successors, (945) [2022-03-18 02:36:57,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4101 states to 4101 states and 4801 transitions. [2022-03-18 02:36:57,667 INFO L78 Accepts]: Start accepts. Automaton has 4101 states and 4801 transitions. Word has length 688 [2022-03-18 02:36:57,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:36:57,668 INFO L478 AbstractCegarLoop]: Abstraction has 4101 states and 4801 transitions. [2022-03-18 02:36:57,668 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 6.589743589743589) internal successors, (257), 38 states have internal predecessors, (257), 38 states have call successors, (110), 38 states have call predecessors, (110), 36 states have return successors, (108), 36 states have call predecessors, (108), 37 states have call successors, (108) [2022-03-18 02:36:57,668 INFO L276 IsEmpty]: Start isEmpty. Operand 4101 states and 4801 transitions. [2022-03-18 02:36:57,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 708 [2022-03-18 02:36:57,679 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:36:57,679 INFO L500 BasicCegarLoop]: trace histogram [109, 108, 108, 37, 36, 36, 36, 36, 36, 36, 36, 36, 36, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:36:57,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-03-18 02:36:57,899 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-03-18 02:36:57,899 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:36:57,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:36:57,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1458826145, now seen corresponding path program 71 times [2022-03-18 02:36:57,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:36:57,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2060075597] [2022-03-18 02:36:57,900 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:36:57,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1458826145, now seen corresponding path program 72 times [2022-03-18 02:36:57,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:36:57,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092701591] [2022-03-18 02:36:57,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:36:57,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:36:57,914 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:36:57,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1167874916] [2022-03-18 02:36:57,914 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:36:57,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:36:57,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:36:57,916 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:36:57,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-18 02:36:58,492 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 70 check-sat command(s) [2022-03-18 02:36:58,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:36:58,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 1530 conjuncts, 77 conjunts are in the unsatisfiable core [2022-03-18 02:36:58,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:36:59,956 INFO L134 CoverageAnalysis]: Checked inductivity of 27814 backedges. 216 proven. 27162 refuted. 0 times theorem prover too weak. 436 trivial. 0 not checked. [2022-03-18 02:36:59,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:37:01,322 INFO L134 CoverageAnalysis]: Checked inductivity of 27814 backedges. 216 proven. 4482 refuted. 0 times theorem prover too weak. 23116 trivial. 0 not checked. [2022-03-18 02:37:01,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:37:01,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092701591] [2022-03-18 02:37:01,323 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:37:01,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167874916] [2022-03-18 02:37:01,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167874916] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:37:01,323 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:37:01,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 54 [2022-03-18 02:37:01,323 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:37:01,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2060075597] [2022-03-18 02:37:01,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2060075597] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:37:01,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:37:01,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-03-18 02:37:01,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405678214] [2022-03-18 02:37:01,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:37:01,324 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-18 02:37:01,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:37:01,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-18 02:37:01,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-18 02:37:01,325 INFO L87 Difference]: Start difference. First operand 4101 states and 4801 transitions. Second operand has 40 states, 40 states have (on average 6.6) internal successors, (264), 39 states have internal predecessors, (264), 39 states have call successors, (113), 39 states have call predecessors, (113), 37 states have return successors, (111), 37 states have call predecessors, (111), 38 states have call successors, (111) [2022-03-18 02:37:03,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:37:03,362 INFO L93 Difference]: Finished difference Result 4230 states and 4962 transitions. [2022-03-18 02:37:03,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-18 02:37:03,363 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 6.6) internal successors, (264), 39 states have internal predecessors, (264), 39 states have call successors, (113), 39 states have call predecessors, (113), 37 states have return successors, (111), 37 states have call predecessors, (111), 38 states have call successors, (111) Word has length 707 [2022-03-18 02:37:03,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:37:03,373 INFO L225 Difference]: With dead ends: 4230 [2022-03-18 02:37:03,373 INFO L226 Difference]: Without dead ends: 4221 [2022-03-18 02:37:03,374 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1449 GetRequests, 1360 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3239, Invalid=4771, Unknown=0, NotChecked=0, Total=8010 [2022-03-18 02:37:03,375 INFO L912 BasicCegarLoop]: 140 mSDtfsCounter, 133 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 02:37:03,375 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 534 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 02:37:03,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4221 states. [2022-03-18 02:37:04,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4221 to 4219. [2022-03-18 02:37:04,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4219 states, 2733 states have (on average 1.0944017563117454) internal successors, (2991), 2834 states have internal predecessors, (2991), 976 states have call successors, (976), 510 states have call predecessors, (976), 509 states have return successors, (973), 874 states have call predecessors, (973), 973 states have call successors, (973) [2022-03-18 02:37:04,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4219 states to 4219 states and 4940 transitions. [2022-03-18 02:37:04,555 INFO L78 Accepts]: Start accepts. Automaton has 4219 states and 4940 transitions. Word has length 707 [2022-03-18 02:37:04,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:37:04,556 INFO L478 AbstractCegarLoop]: Abstraction has 4219 states and 4940 transitions. [2022-03-18 02:37:04,556 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 6.6) internal successors, (264), 39 states have internal predecessors, (264), 39 states have call successors, (113), 39 states have call predecessors, (113), 37 states have return successors, (111), 37 states have call predecessors, (111), 38 states have call successors, (111) [2022-03-18 02:37:04,556 INFO L276 IsEmpty]: Start isEmpty. Operand 4219 states and 4940 transitions. [2022-03-18 02:37:04,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 727 [2022-03-18 02:37:04,563 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:37:04,564 INFO L500 BasicCegarLoop]: trace histogram [112, 111, 111, 38, 37, 37, 37, 37, 37, 37, 37, 37, 37, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:37:04,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-03-18 02:37:04,765 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-03-18 02:37:04,765 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:37:04,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:37:04,765 INFO L85 PathProgramCache]: Analyzing trace with hash 968081234, now seen corresponding path program 73 times [2022-03-18 02:37:04,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:37:04,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [481936910] [2022-03-18 02:37:04,766 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:37:04,766 INFO L85 PathProgramCache]: Analyzing trace with hash 968081234, now seen corresponding path program 74 times [2022-03-18 02:37:04,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:37:04,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773894866] [2022-03-18 02:37:04,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:37:04,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:37:04,782 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:37:04,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1769826938] [2022-03-18 02:37:04,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:37:04,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:37:04,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:37:04,783 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:37:04,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-18 02:37:04,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:37:04,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:37:04,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 1579 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-18 02:37:04,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:37:06,423 INFO L134 CoverageAnalysis]: Checked inductivity of 29382 backedges. 222 proven. 28712 refuted. 0 times theorem prover too weak. 448 trivial. 0 not checked. [2022-03-18 02:37:06,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:37:07,744 INFO L134 CoverageAnalysis]: Checked inductivity of 29382 backedges. 222 proven. 4736 refuted. 0 times theorem prover too weak. 24424 trivial. 0 not checked. [2022-03-18 02:37:07,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:37:07,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773894866] [2022-03-18 02:37:07,745 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:37:07,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769826938] [2022-03-18 02:37:07,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769826938] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:37:07,745 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:37:07,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 54 [2022-03-18 02:37:07,745 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:37:07,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [481936910] [2022-03-18 02:37:07,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [481936910] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:37:07,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:37:07,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-03-18 02:37:07,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441730102] [2022-03-18 02:37:07,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:37:07,746 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-18 02:37:07,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:37:07,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-18 02:37:07,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-18 02:37:07,747 INFO L87 Difference]: Start difference. First operand 4219 states and 4940 transitions. Second operand has 41 states, 41 states have (on average 6.609756097560975) internal successors, (271), 40 states have internal predecessors, (271), 40 states have call successors, (116), 40 states have call predecessors, (116), 38 states have return successors, (114), 38 states have call predecessors, (114), 39 states have call successors, (114) [2022-03-18 02:37:09,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:37:09,943 INFO L93 Difference]: Finished difference Result 4348 states and 5101 transitions. [2022-03-18 02:37:09,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-18 02:37:09,944 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 6.609756097560975) internal successors, (271), 40 states have internal predecessors, (271), 40 states have call successors, (116), 40 states have call predecessors, (116), 38 states have return successors, (114), 38 states have call predecessors, (114), 39 states have call successors, (114) Word has length 726 [2022-03-18 02:37:09,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:37:09,951 INFO L225 Difference]: With dead ends: 4348 [2022-03-18 02:37:09,951 INFO L226 Difference]: Without dead ends: 4339 [2022-03-18 02:37:09,952 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1488 GetRequests, 1398 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3292, Invalid=4898, Unknown=0, NotChecked=0, Total=8190 [2022-03-18 02:37:09,952 INFO L912 BasicCegarLoop]: 143 mSDtfsCounter, 122 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 02:37:09,952 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 576 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 02:37:09,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4339 states. [2022-03-18 02:37:11,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4339 to 4337. [2022-03-18 02:37:11,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4337 states, 2809 states have (on average 1.0943396226415094) internal successors, (3074), 2913 states have internal predecessors, (3074), 1004 states have call successors, (1004), 524 states have call predecessors, (1004), 523 states have return successors, (1001), 899 states have call predecessors, (1001), 1001 states have call successors, (1001) [2022-03-18 02:37:11,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4337 states to 4337 states and 5079 transitions. [2022-03-18 02:37:11,092 INFO L78 Accepts]: Start accepts. Automaton has 4337 states and 5079 transitions. Word has length 726 [2022-03-18 02:37:11,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:37:11,093 INFO L478 AbstractCegarLoop]: Abstraction has 4337 states and 5079 transitions. [2022-03-18 02:37:11,093 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 6.609756097560975) internal successors, (271), 40 states have internal predecessors, (271), 40 states have call successors, (116), 40 states have call predecessors, (116), 38 states have return successors, (114), 38 states have call predecessors, (114), 39 states have call successors, (114) [2022-03-18 02:37:11,093 INFO L276 IsEmpty]: Start isEmpty. Operand 4337 states and 5079 transitions. [2022-03-18 02:37:11,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 746 [2022-03-18 02:37:11,101 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:37:11,101 INFO L500 BasicCegarLoop]: trace histogram [115, 114, 114, 39, 38, 38, 38, 38, 38, 38, 38, 38, 38, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:37:11,119 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-03-18 02:37:11,301 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-03-18 02:37:11,301 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:37:11,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:37:11,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1825946623, now seen corresponding path program 75 times [2022-03-18 02:37:11,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:37:11,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [657571588] [2022-03-18 02:37:11,302 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:37:11,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1825946623, now seen corresponding path program 76 times [2022-03-18 02:37:11,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:37:11,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257906632] [2022-03-18 02:37:11,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:37:11,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:37:11,318 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:37:11,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [305687883] [2022-03-18 02:37:11,319 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:37:11,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:37:11,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:37:11,320 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:37:11,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-18 02:37:11,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:37:11,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:37:11,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 1619 conjuncts, 81 conjunts are in the unsatisfiable core [2022-03-18 02:37:11,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:37:13,107 INFO L134 CoverageAnalysis]: Checked inductivity of 30993 backedges. 228 proven. 30305 refuted. 0 times theorem prover too weak. 460 trivial. 0 not checked. [2022-03-18 02:37:13,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:37:14,467 INFO L134 CoverageAnalysis]: Checked inductivity of 30993 backedges. 228 proven. 4997 refuted. 0 times theorem prover too weak. 25768 trivial. 0 not checked. [2022-03-18 02:37:14,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:37:14,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257906632] [2022-03-18 02:37:14,467 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:37:14,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305687883] [2022-03-18 02:37:14,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305687883] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:37:14,468 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:37:14,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 54 [2022-03-18 02:37:14,468 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:37:14,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [657571588] [2022-03-18 02:37:14,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [657571588] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:37:14,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:37:14,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-03-18 02:37:14,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854528732] [2022-03-18 02:37:14,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:37:14,469 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-18 02:37:14,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:37:14,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-18 02:37:14,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-18 02:37:14,470 INFO L87 Difference]: Start difference. First operand 4337 states and 5079 transitions. Second operand has 42 states, 42 states have (on average 6.619047619047619) internal successors, (278), 41 states have internal predecessors, (278), 41 states have call successors, (119), 41 states have call predecessors, (119), 39 states have return successors, (117), 39 states have call predecessors, (117), 40 states have call successors, (117) [2022-03-18 02:37:16,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:37:16,667 INFO L93 Difference]: Finished difference Result 4466 states and 5240 transitions. [2022-03-18 02:37:16,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-18 02:37:16,668 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 6.619047619047619) internal successors, (278), 41 states have internal predecessors, (278), 41 states have call successors, (119), 41 states have call predecessors, (119), 39 states have return successors, (117), 39 states have call predecessors, (117), 40 states have call successors, (117) Word has length 745 [2022-03-18 02:37:16,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:37:16,678 INFO L225 Difference]: With dead ends: 4466 [2022-03-18 02:37:16,679 INFO L226 Difference]: Without dead ends: 4457 [2022-03-18 02:37:16,680 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1527 GetRequests, 1436 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3345, Invalid=5027, Unknown=0, NotChecked=0, Total=8372 [2022-03-18 02:37:16,680 INFO L912 BasicCegarLoop]: 146 mSDtfsCounter, 140 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 02:37:16,680 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 608 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 02:37:16,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4457 states. [2022-03-18 02:37:17,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4457 to 4455. [2022-03-18 02:37:17,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4455 states, 2885 states have (on average 1.0942807625649913) internal successors, (3157), 2992 states have internal predecessors, (3157), 1032 states have call successors, (1032), 538 states have call predecessors, (1032), 537 states have return successors, (1029), 924 states have call predecessors, (1029), 1029 states have call successors, (1029) [2022-03-18 02:37:17,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4455 states to 4455 states and 5218 transitions. [2022-03-18 02:37:17,928 INFO L78 Accepts]: Start accepts. Automaton has 4455 states and 5218 transitions. Word has length 745 [2022-03-18 02:37:17,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:37:17,928 INFO L478 AbstractCegarLoop]: Abstraction has 4455 states and 5218 transitions. [2022-03-18 02:37:17,929 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 6.619047619047619) internal successors, (278), 41 states have internal predecessors, (278), 41 states have call successors, (119), 41 states have call predecessors, (119), 39 states have return successors, (117), 39 states have call predecessors, (117), 40 states have call successors, (117) [2022-03-18 02:37:17,929 INFO L276 IsEmpty]: Start isEmpty. Operand 4455 states and 5218 transitions. [2022-03-18 02:37:17,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 765 [2022-03-18 02:37:17,937 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:37:17,938 INFO L500 BasicCegarLoop]: trace histogram [118, 117, 117, 40, 39, 39, 39, 39, 39, 39, 39, 39, 39, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:37:17,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-03-18 02:37:18,138 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-03-18 02:37:18,138 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:37:18,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:37:18,139 INFO L85 PathProgramCache]: Analyzing trace with hash 874433266, now seen corresponding path program 77 times [2022-03-18 02:37:18,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:37:18,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1355127490] [2022-03-18 02:37:18,139 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:37:18,140 INFO L85 PathProgramCache]: Analyzing trace with hash 874433266, now seen corresponding path program 78 times [2022-03-18 02:37:18,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:37:18,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550988748] [2022-03-18 02:37:18,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:37:18,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:37:18,151 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:37:18,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [707312689] [2022-03-18 02:37:18,151 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:37:18,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:37:18,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:37:18,155 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:37:18,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-18 02:37:40,381 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 78 check-sat command(s) [2022-03-18 02:37:40,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:37:40,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 1659 conjuncts, 83 conjunts are in the unsatisfiable core [2022-03-18 02:37:40,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:37:42,010 INFO L134 CoverageAnalysis]: Checked inductivity of 32647 backedges. 234 proven. 31941 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2022-03-18 02:37:42,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:37:43,441 INFO L134 CoverageAnalysis]: Checked inductivity of 32647 backedges. 234 proven. 5265 refuted. 0 times theorem prover too weak. 27148 trivial. 0 not checked. [2022-03-18 02:37:43,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:37:43,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550988748] [2022-03-18 02:37:43,441 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:37:43,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707312689] [2022-03-18 02:37:43,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707312689] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:37:43,441 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:37:43,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 54 [2022-03-18 02:37:43,442 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:37:43,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1355127490] [2022-03-18 02:37:43,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1355127490] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:37:43,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:37:43,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-03-18 02:37:43,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102578642] [2022-03-18 02:37:43,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:37:43,443 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-18 02:37:43,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:37:43,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-18 02:37:43,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-18 02:37:43,444 INFO L87 Difference]: Start difference. First operand 4455 states and 5218 transitions. Second operand has 43 states, 43 states have (on average 6.627906976744186) internal successors, (285), 42 states have internal predecessors, (285), 42 states have call successors, (122), 42 states have call predecessors, (122), 40 states have return successors, (120), 40 states have call predecessors, (120), 41 states have call successors, (120) [2022-03-18 02:37:45,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:37:45,761 INFO L93 Difference]: Finished difference Result 4584 states and 5379 transitions. [2022-03-18 02:37:45,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-18 02:37:45,761 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 6.627906976744186) internal successors, (285), 42 states have internal predecessors, (285), 42 states have call successors, (122), 42 states have call predecessors, (122), 40 states have return successors, (120), 40 states have call predecessors, (120), 41 states have call successors, (120) Word has length 764 [2022-03-18 02:37:45,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:37:45,768 INFO L225 Difference]: With dead ends: 4584 [2022-03-18 02:37:45,769 INFO L226 Difference]: Without dead ends: 4575 [2022-03-18 02:37:45,769 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1566 GetRequests, 1474 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3398, Invalid=5158, Unknown=0, NotChecked=0, Total=8556 [2022-03-18 02:37:45,770 INFO L912 BasicCegarLoop]: 149 mSDtfsCounter, 136 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 02:37:45,770 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 610 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 02:37:45,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4575 states. [2022-03-18 02:37:46,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4575 to 4573. [2022-03-18 02:37:46,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4573 states, 2961 states have (on average 1.094224924012158) internal successors, (3240), 3071 states have internal predecessors, (3240), 1060 states have call successors, (1060), 552 states have call predecessors, (1060), 551 states have return successors, (1057), 949 states have call predecessors, (1057), 1057 states have call successors, (1057) [2022-03-18 02:37:46,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4573 states to 4573 states and 5357 transitions. [2022-03-18 02:37:46,977 INFO L78 Accepts]: Start accepts. Automaton has 4573 states and 5357 transitions. Word has length 764 [2022-03-18 02:37:46,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:37:46,977 INFO L478 AbstractCegarLoop]: Abstraction has 4573 states and 5357 transitions. [2022-03-18 02:37:46,977 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 6.627906976744186) internal successors, (285), 42 states have internal predecessors, (285), 42 states have call successors, (122), 42 states have call predecessors, (122), 40 states have return successors, (120), 40 states have call predecessors, (120), 41 states have call successors, (120) [2022-03-18 02:37:46,978 INFO L276 IsEmpty]: Start isEmpty. Operand 4573 states and 5357 transitions. [2022-03-18 02:37:46,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 784 [2022-03-18 02:37:46,986 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:37:46,986 INFO L500 BasicCegarLoop]: trace histogram [121, 120, 120, 41, 40, 40, 40, 40, 40, 40, 40, 40, 40, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:37:47,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-03-18 02:37:47,186 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:37:47,186 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:37:47,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:37:47,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1405397919, now seen corresponding path program 79 times [2022-03-18 02:37:47,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:37:47,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [465377062] [2022-03-18 02:37:47,187 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:37:47,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1405397919, now seen corresponding path program 80 times [2022-03-18 02:37:47,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:37:47,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843340052] [2022-03-18 02:37:47,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:37:47,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:37:47,201 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:37:47,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2106012717] [2022-03-18 02:37:47,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:37:47,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:37:47,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:37:47,203 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:37:47,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-18 02:37:47,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:37:47,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:37:47,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 1699 conjuncts, 85 conjunts are in the unsatisfiable core [2022-03-18 02:37:47,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:37:49,147 INFO L134 CoverageAnalysis]: Checked inductivity of 34344 backedges. 240 proven. 33620 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-03-18 02:37:49,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:37:50,558 INFO L134 CoverageAnalysis]: Checked inductivity of 34344 backedges. 240 proven. 5540 refuted. 0 times theorem prover too weak. 28564 trivial. 0 not checked. [2022-03-18 02:37:50,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:37:50,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843340052] [2022-03-18 02:37:50,558 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:37:50,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106012717] [2022-03-18 02:37:50,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106012717] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:37:50,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:37:50,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 54 [2022-03-18 02:37:50,559 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:37:50,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [465377062] [2022-03-18 02:37:50,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [465377062] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:37:50,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:37:50,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-03-18 02:37:50,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066834275] [2022-03-18 02:37:50,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:37:50,560 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-18 02:37:50,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:37:50,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-18 02:37:50,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-18 02:37:50,560 INFO L87 Difference]: Start difference. First operand 4573 states and 5357 transitions. Second operand has 44 states, 44 states have (on average 6.636363636363637) internal successors, (292), 43 states have internal predecessors, (292), 43 states have call successors, (125), 43 states have call predecessors, (125), 41 states have return successors, (123), 41 states have call predecessors, (123), 42 states have call successors, (123) [2022-03-18 02:37:52,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:37:52,899 INFO L93 Difference]: Finished difference Result 4702 states and 5518 transitions. [2022-03-18 02:37:52,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-18 02:37:52,899 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 6.636363636363637) internal successors, (292), 43 states have internal predecessors, (292), 43 states have call successors, (125), 43 states have call predecessors, (125), 41 states have return successors, (123), 41 states have call predecessors, (123), 42 states have call successors, (123) Word has length 783 [2022-03-18 02:37:52,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:37:52,908 INFO L225 Difference]: With dead ends: 4702 [2022-03-18 02:37:52,908 INFO L226 Difference]: Without dead ends: 4693 [2022-03-18 02:37:52,909 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1605 GetRequests, 1512 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3451, Invalid=5291, Unknown=0, NotChecked=0, Total=8742 [2022-03-18 02:37:52,909 INFO L912 BasicCegarLoop]: 152 mSDtfsCounter, 161 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 02:37:52,909 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 612 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 02:37:52,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4693 states. [2022-03-18 02:37:54,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4693 to 4691. [2022-03-18 02:37:54,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4691 states, 3037 states have (on average 1.0941718801448799) internal successors, (3323), 3150 states have internal predecessors, (3323), 1088 states have call successors, (1088), 566 states have call predecessors, (1088), 565 states have return successors, (1085), 974 states have call predecessors, (1085), 1085 states have call successors, (1085) [2022-03-18 02:37:54,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4691 states to 4691 states and 5496 transitions. [2022-03-18 02:37:54,205 INFO L78 Accepts]: Start accepts. Automaton has 4691 states and 5496 transitions. Word has length 783 [2022-03-18 02:37:54,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:37:54,205 INFO L478 AbstractCegarLoop]: Abstraction has 4691 states and 5496 transitions. [2022-03-18 02:37:54,205 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 6.636363636363637) internal successors, (292), 43 states have internal predecessors, (292), 43 states have call successors, (125), 43 states have call predecessors, (125), 41 states have return successors, (123), 41 states have call predecessors, (123), 42 states have call successors, (123) [2022-03-18 02:37:54,206 INFO L276 IsEmpty]: Start isEmpty. Operand 4691 states and 5496 transitions. [2022-03-18 02:37:54,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 803 [2022-03-18 02:37:54,214 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:37:54,214 INFO L500 BasicCegarLoop]: trace histogram [124, 123, 123, 42, 41, 41, 41, 41, 41, 41, 41, 41, 41, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:37:54,233 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-03-18 02:37:54,415 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:37:54,415 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:37:54,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:37:54,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1316741486, now seen corresponding path program 81 times [2022-03-18 02:37:54,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:37:54,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1836937198] [2022-03-18 02:37:54,416 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:37:54,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1316741486, now seen corresponding path program 82 times [2022-03-18 02:37:54,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:37:54,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945551108] [2022-03-18 02:37:54,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:37:54,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:37:54,428 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:37:54,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1726809058] [2022-03-18 02:37:54,428 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:37:54,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:37:54,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:37:54,429 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:37:54,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-18 02:37:54,659 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:37:54,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:37:54,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 1739 conjuncts, 87 conjunts are in the unsatisfiable core [2022-03-18 02:37:54,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:37:56,388 INFO L134 CoverageAnalysis]: Checked inductivity of 36084 backedges. 246 proven. 35342 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2022-03-18 02:37:56,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:37:57,763 INFO L134 CoverageAnalysis]: Checked inductivity of 36084 backedges. 246 proven. 5822 refuted. 0 times theorem prover too weak. 30016 trivial. 0 not checked. [2022-03-18 02:37:57,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:37:57,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945551108] [2022-03-18 02:37:57,763 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:37:57,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726809058] [2022-03-18 02:37:57,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726809058] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:37:57,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:37:57,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 54 [2022-03-18 02:37:57,764 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:37:57,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1836937198] [2022-03-18 02:37:57,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1836937198] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:37:57,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:37:57,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-03-18 02:37:57,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80663102] [2022-03-18 02:37:57,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:37:57,764 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-18 02:37:57,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:37:57,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-18 02:37:57,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-18 02:37:57,765 INFO L87 Difference]: Start difference. First operand 4691 states and 5496 transitions. Second operand has 45 states, 45 states have (on average 6.644444444444445) internal successors, (299), 44 states have internal predecessors, (299), 44 states have call successors, (128), 44 states have call predecessors, (128), 42 states have return successors, (126), 42 states have call predecessors, (126), 43 states have call successors, (126) [2022-03-18 02:38:00,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:38:00,256 INFO L93 Difference]: Finished difference Result 4820 states and 5657 transitions. [2022-03-18 02:38:00,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-18 02:38:00,257 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 6.644444444444445) internal successors, (299), 44 states have internal predecessors, (299), 44 states have call successors, (128), 44 states have call predecessors, (128), 42 states have return successors, (126), 42 states have call predecessors, (126), 43 states have call successors, (126) Word has length 802 [2022-03-18 02:38:00,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:38:00,264 INFO L225 Difference]: With dead ends: 4820 [2022-03-18 02:38:00,264 INFO L226 Difference]: Without dead ends: 4811 [2022-03-18 02:38:00,265 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1644 GetRequests, 1550 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 918 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3504, Invalid=5426, Unknown=0, NotChecked=0, Total=8930 [2022-03-18 02:38:00,266 INFO L912 BasicCegarLoop]: 155 mSDtfsCounter, 159 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 02:38:00,266 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 594 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 02:38:00,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4811 states. [2022-03-18 02:38:01,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4811 to 4809. [2022-03-18 02:38:01,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4809 states, 3113 states have (on average 1.0941214262769032) internal successors, (3406), 3229 states have internal predecessors, (3406), 1116 states have call successors, (1116), 580 states have call predecessors, (1116), 579 states have return successors, (1113), 999 states have call predecessors, (1113), 1113 states have call successors, (1113) [2022-03-18 02:38:01,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4809 states to 4809 states and 5635 transitions. [2022-03-18 02:38:01,590 INFO L78 Accepts]: Start accepts. Automaton has 4809 states and 5635 transitions. Word has length 802 [2022-03-18 02:38:01,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:38:01,590 INFO L478 AbstractCegarLoop]: Abstraction has 4809 states and 5635 transitions. [2022-03-18 02:38:01,591 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 6.644444444444445) internal successors, (299), 44 states have internal predecessors, (299), 44 states have call successors, (128), 44 states have call predecessors, (128), 42 states have return successors, (126), 42 states have call predecessors, (126), 43 states have call successors, (126) [2022-03-18 02:38:01,591 INFO L276 IsEmpty]: Start isEmpty. Operand 4809 states and 5635 transitions. [2022-03-18 02:38:01,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 822 [2022-03-18 02:38:01,599 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:38:01,599 INFO L500 BasicCegarLoop]: trace histogram [127, 126, 126, 43, 42, 42, 42, 42, 42, 42, 42, 42, 42, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:38:01,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-03-18 02:38:01,801 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:38:01,801 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:38:01,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:38:01,801 INFO L85 PathProgramCache]: Analyzing trace with hash -530768703, now seen corresponding path program 83 times [2022-03-18 02:38:01,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:38:01,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [688228884] [2022-03-18 02:38:01,802 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:38:01,802 INFO L85 PathProgramCache]: Analyzing trace with hash -530768703, now seen corresponding path program 84 times [2022-03-18 02:38:01,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:38:01,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881019591] [2022-03-18 02:38:01,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:38:01,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:38:01,813 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:38:01,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [473235459] [2022-03-18 02:38:01,814 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:38:01,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:38:01,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:38:01,815 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:38:01,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-18 02:38:05,537 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 81 check-sat command(s) [2022-03-18 02:38:05,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:38:05,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 1779 conjuncts, 89 conjunts are in the unsatisfiable core [2022-03-18 02:38:05,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:38:07,368 INFO L134 CoverageAnalysis]: Checked inductivity of 37867 backedges. 252 proven. 37107 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2022-03-18 02:38:07,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:38:08,697 INFO L134 CoverageAnalysis]: Checked inductivity of 37867 backedges. 252 proven. 6111 refuted. 0 times theorem prover too weak. 31504 trivial. 0 not checked. [2022-03-18 02:38:08,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:38:08,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881019591] [2022-03-18 02:38:08,698 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:38:08,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473235459] [2022-03-18 02:38:08,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473235459] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:38:08,698 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:38:08,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 54 [2022-03-18 02:38:08,698 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:38:08,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [688228884] [2022-03-18 02:38:08,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [688228884] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:38:08,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:38:08,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-03-18 02:38:08,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013439175] [2022-03-18 02:38:08,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:38:08,699 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-18 02:38:08,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:38:08,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-18 02:38:08,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-18 02:38:08,700 INFO L87 Difference]: Start difference. First operand 4809 states and 5635 transitions. Second operand has 46 states, 46 states have (on average 6.6521739130434785) internal successors, (306), 45 states have internal predecessors, (306), 45 states have call successors, (131), 45 states have call predecessors, (131), 43 states have return successors, (129), 43 states have call predecessors, (129), 44 states have call successors, (129) [2022-03-18 02:38:11,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:38:11,249 INFO L93 Difference]: Finished difference Result 4938 states and 5796 transitions. [2022-03-18 02:38:11,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-18 02:38:11,250 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 6.6521739130434785) internal successors, (306), 45 states have internal predecessors, (306), 45 states have call successors, (131), 45 states have call predecessors, (131), 43 states have return successors, (129), 43 states have call predecessors, (129), 44 states have call successors, (129) Word has length 821 [2022-03-18 02:38:11,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:38:11,258 INFO L225 Difference]: With dead ends: 4938 [2022-03-18 02:38:11,258 INFO L226 Difference]: Without dead ends: 4929 [2022-03-18 02:38:11,259 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1683 GetRequests, 1588 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3557, Invalid=5563, Unknown=0, NotChecked=0, Total=9120 [2022-03-18 02:38:11,259 INFO L912 BasicCegarLoop]: 158 mSDtfsCounter, 144 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 02:38:11,259 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 636 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 02:38:11,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4929 states. [2022-03-18 02:38:12,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4929 to 4927. [2022-03-18 02:38:12,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4927 states, 3189 states have (on average 1.0940733772342428) internal successors, (3489), 3308 states have internal predecessors, (3489), 1144 states have call successors, (1144), 594 states have call predecessors, (1144), 593 states have return successors, (1141), 1024 states have call predecessors, (1141), 1141 states have call successors, (1141) [2022-03-18 02:38:12,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4927 states to 4927 states and 5774 transitions. [2022-03-18 02:38:12,594 INFO L78 Accepts]: Start accepts. Automaton has 4927 states and 5774 transitions. Word has length 821 [2022-03-18 02:38:12,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:38:12,594 INFO L478 AbstractCegarLoop]: Abstraction has 4927 states and 5774 transitions. [2022-03-18 02:38:12,594 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 6.6521739130434785) internal successors, (306), 45 states have internal predecessors, (306), 45 states have call successors, (131), 45 states have call predecessors, (131), 43 states have return successors, (129), 43 states have call predecessors, (129), 44 states have call successors, (129) [2022-03-18 02:38:12,594 INFO L276 IsEmpty]: Start isEmpty. Operand 4927 states and 5774 transitions. [2022-03-18 02:38:12,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 841 [2022-03-18 02:38:12,603 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:38:12,603 INFO L500 BasicCegarLoop]: trace histogram [130, 129, 129, 44, 43, 43, 43, 43, 43, 43, 43, 43, 43, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:38:12,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-03-18 02:38:12,803 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2022-03-18 02:38:12,804 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:38:12,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:38:12,804 INFO L85 PathProgramCache]: Analyzing trace with hash -336741838, now seen corresponding path program 85 times [2022-03-18 02:38:12,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:38:12,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1765552217] [2022-03-18 02:38:12,805 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:38:12,805 INFO L85 PathProgramCache]: Analyzing trace with hash -336741838, now seen corresponding path program 86 times [2022-03-18 02:38:12,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:38:12,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407529392] [2022-03-18 02:38:12,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:38:12,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:38:12,820 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:38:12,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [687171026] [2022-03-18 02:38:12,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:38:12,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:38:12,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:38:12,822 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:38:12,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-18 02:38:13,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:38:13,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:38:13,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 1819 conjuncts, 91 conjunts are in the unsatisfiable core [2022-03-18 02:38:13,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:38:14,854 INFO L134 CoverageAnalysis]: Checked inductivity of 39693 backedges. 258 proven. 38915 refuted. 0 times theorem prover too weak. 520 trivial. 0 not checked. [2022-03-18 02:38:14,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:38:16,209 INFO L134 CoverageAnalysis]: Checked inductivity of 39693 backedges. 258 proven. 6407 refuted. 0 times theorem prover too weak. 33028 trivial. 0 not checked. [2022-03-18 02:38:16,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:38:16,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407529392] [2022-03-18 02:38:16,210 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:38:16,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687171026] [2022-03-18 02:38:16,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687171026] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:38:16,210 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:38:16,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 54 [2022-03-18 02:38:16,210 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:38:16,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1765552217] [2022-03-18 02:38:16,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1765552217] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:38:16,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:38:16,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-03-18 02:38:16,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831466947] [2022-03-18 02:38:16,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:38:16,211 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-18 02:38:16,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:38:16,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-18 02:38:16,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-18 02:38:16,212 INFO L87 Difference]: Start difference. First operand 4927 states and 5774 transitions. Second operand has 47 states, 47 states have (on average 6.659574468085107) internal successors, (313), 46 states have internal predecessors, (313), 46 states have call successors, (134), 46 states have call predecessors, (134), 44 states have return successors, (132), 44 states have call predecessors, (132), 45 states have call successors, (132) [2022-03-18 02:38:18,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:38:18,824 INFO L93 Difference]: Finished difference Result 5056 states and 5935 transitions. [2022-03-18 02:38:18,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-03-18 02:38:18,824 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 6.659574468085107) internal successors, (313), 46 states have internal predecessors, (313), 46 states have call successors, (134), 46 states have call predecessors, (134), 44 states have return successors, (132), 44 states have call predecessors, (132), 45 states have call successors, (132) Word has length 840 [2022-03-18 02:38:18,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:38:18,833 INFO L225 Difference]: With dead ends: 5056 [2022-03-18 02:38:18,833 INFO L226 Difference]: Without dead ends: 5047 [2022-03-18 02:38:18,834 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1722 GetRequests, 1626 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3610, Invalid=5702, Unknown=0, NotChecked=0, Total=9312 [2022-03-18 02:38:18,834 INFO L912 BasicCegarLoop]: 161 mSDtfsCounter, 169 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 02:38:18,834 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 638 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 02:38:18,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5047 states. [2022-03-18 02:38:20,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5047 to 5045. [2022-03-18 02:38:20,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5045 states, 3265 states have (on average 1.0940275650842266) internal successors, (3572), 3387 states have internal predecessors, (3572), 1172 states have call successors, (1172), 608 states have call predecessors, (1172), 607 states have return successors, (1169), 1049 states have call predecessors, (1169), 1169 states have call successors, (1169) [2022-03-18 02:38:20,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5045 states to 5045 states and 5913 transitions. [2022-03-18 02:38:20,173 INFO L78 Accepts]: Start accepts. Automaton has 5045 states and 5913 transitions. Word has length 840 [2022-03-18 02:38:20,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:38:20,173 INFO L478 AbstractCegarLoop]: Abstraction has 5045 states and 5913 transitions. [2022-03-18 02:38:20,174 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 6.659574468085107) internal successors, (313), 46 states have internal predecessors, (313), 46 states have call successors, (134), 46 states have call predecessors, (134), 44 states have return successors, (132), 44 states have call predecessors, (132), 45 states have call successors, (132) [2022-03-18 02:38:20,174 INFO L276 IsEmpty]: Start isEmpty. Operand 5045 states and 5913 transitions. [2022-03-18 02:38:20,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 860 [2022-03-18 02:38:20,184 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:38:20,185 INFO L500 BasicCegarLoop]: trace histogram [133, 132, 132, 45, 44, 44, 44, 44, 44, 44, 44, 44, 44, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:38:20,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-03-18 02:38:20,385 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:38:20,385 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:38:20,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:38:20,386 INFO L85 PathProgramCache]: Analyzing trace with hash 356883745, now seen corresponding path program 87 times [2022-03-18 02:38:20,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:38:20,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1048238534] [2022-03-18 02:38:20,386 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:38:20,386 INFO L85 PathProgramCache]: Analyzing trace with hash 356883745, now seen corresponding path program 88 times [2022-03-18 02:38:20,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:38:20,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440053866] [2022-03-18 02:38:20,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:38:20,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:38:20,401 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:38:20,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1953426589] [2022-03-18 02:38:20,401 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:38:20,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:38:20,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:38:20,403 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:38:20,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-18 02:38:20,653 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:38:20,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:38:20,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 1859 conjuncts, 93 conjunts are in the unsatisfiable core [2022-03-18 02:38:20,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:38:22,571 INFO L134 CoverageAnalysis]: Checked inductivity of 41562 backedges. 264 proven. 40766 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2022-03-18 02:38:22,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:38:23,955 INFO L134 CoverageAnalysis]: Checked inductivity of 41562 backedges. 264 proven. 6710 refuted. 0 times theorem prover too weak. 34588 trivial. 0 not checked. [2022-03-18 02:38:23,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:38:23,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440053866] [2022-03-18 02:38:23,955 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:38:23,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953426589] [2022-03-18 02:38:23,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953426589] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:38:23,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:38:23,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 54 [2022-03-18 02:38:23,956 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:38:23,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1048238534] [2022-03-18 02:38:23,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1048238534] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:38:23,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:38:23,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-03-18 02:38:23,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008721208] [2022-03-18 02:38:23,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:38:23,956 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-18 02:38:23,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:38:23,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-18 02:38:23,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-18 02:38:23,957 INFO L87 Difference]: Start difference. First operand 5045 states and 5913 transitions. Second operand has 48 states, 48 states have (on average 6.666666666666667) internal successors, (320), 47 states have internal predecessors, (320), 47 states have call successors, (137), 47 states have call predecessors, (137), 45 states have return successors, (135), 45 states have call predecessors, (135), 46 states have call successors, (135) [2022-03-18 02:38:26,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:38:26,723 INFO L93 Difference]: Finished difference Result 5174 states and 6074 transitions. [2022-03-18 02:38:26,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-03-18 02:38:26,723 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 6.666666666666667) internal successors, (320), 47 states have internal predecessors, (320), 47 states have call successors, (137), 47 states have call predecessors, (137), 45 states have return successors, (135), 45 states have call predecessors, (135), 46 states have call successors, (135) Word has length 859 [2022-03-18 02:38:26,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:38:26,732 INFO L225 Difference]: With dead ends: 5174 [2022-03-18 02:38:26,732 INFO L226 Difference]: Without dead ends: 5165 [2022-03-18 02:38:26,733 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1761 GetRequests, 1664 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1044 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3663, Invalid=5843, Unknown=0, NotChecked=0, Total=9506 [2022-03-18 02:38:26,734 INFO L912 BasicCegarLoop]: 164 mSDtfsCounter, 134 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 02:38:26,734 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 650 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 02:38:26,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5165 states. [2022-03-18 02:38:28,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5165 to 5163. [2022-03-18 02:38:28,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5163 states, 3341 states have (on average 1.0939838371744988) internal successors, (3655), 3466 states have internal predecessors, (3655), 1200 states have call successors, (1200), 622 states have call predecessors, (1200), 621 states have return successors, (1197), 1074 states have call predecessors, (1197), 1197 states have call successors, (1197) [2022-03-18 02:38:28,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5163 states to 5163 states and 6052 transitions. [2022-03-18 02:38:28,089 INFO L78 Accepts]: Start accepts. Automaton has 5163 states and 6052 transitions. Word has length 859 [2022-03-18 02:38:28,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:38:28,090 INFO L478 AbstractCegarLoop]: Abstraction has 5163 states and 6052 transitions. [2022-03-18 02:38:28,090 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 6.666666666666667) internal successors, (320), 47 states have internal predecessors, (320), 47 states have call successors, (137), 47 states have call predecessors, (137), 45 states have return successors, (135), 45 states have call predecessors, (135), 46 states have call successors, (135) [2022-03-18 02:38:28,090 INFO L276 IsEmpty]: Start isEmpty. Operand 5163 states and 6052 transitions. [2022-03-18 02:38:28,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 879 [2022-03-18 02:38:28,100 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:38:28,100 INFO L500 BasicCegarLoop]: trace histogram [136, 135, 135, 46, 45, 45, 45, 45, 45, 45, 45, 45, 45, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:38:28,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-03-18 02:38:28,321 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:38:28,321 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:38:28,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:38:28,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1172676050, now seen corresponding path program 89 times [2022-03-18 02:38:28,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:38:28,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [626484302] [2022-03-18 02:38:28,322 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:38:28,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1172676050, now seen corresponding path program 90 times [2022-03-18 02:38:28,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:38:28,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952106639] [2022-03-18 02:38:28,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:38:28,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:38:28,334 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:38:28,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2027799875] [2022-03-18 02:38:28,334 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:38:28,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:38:28,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:38:28,336 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:38:28,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-18 02:38:58,104 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 86 check-sat command(s) [2022-03-18 02:38:58,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:38:58,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 1890 conjuncts, 95 conjunts are in the unsatisfiable core [2022-03-18 02:38:58,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:39:00,047 INFO L134 CoverageAnalysis]: Checked inductivity of 43474 backedges. 270 proven. 42660 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-03-18 02:39:00,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:39:01,386 INFO L134 CoverageAnalysis]: Checked inductivity of 43474 backedges. 270 proven. 7020 refuted. 0 times theorem prover too weak. 36184 trivial. 0 not checked. [2022-03-18 02:39:01,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:39:01,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952106639] [2022-03-18 02:39:01,386 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:39:01,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027799875] [2022-03-18 02:39:01,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027799875] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:39:01,386 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:39:01,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 54 [2022-03-18 02:39:01,387 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:39:01,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [626484302] [2022-03-18 02:39:01,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [626484302] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:39:01,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:39:01,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-03-18 02:39:01,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573511794] [2022-03-18 02:39:01,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:39:01,387 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-18 02:39:01,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:39:01,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-18 02:39:01,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-18 02:39:01,389 INFO L87 Difference]: Start difference. First operand 5163 states and 6052 transitions. Second operand has 49 states, 49 states have (on average 6.673469387755102) internal successors, (327), 48 states have internal predecessors, (327), 48 states have call successors, (140), 48 states have call predecessors, (140), 46 states have return successors, (138), 46 states have call predecessors, (138), 47 states have call successors, (138) [2022-03-18 02:39:04,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:39:04,125 INFO L93 Difference]: Finished difference Result 5292 states and 6213 transitions. [2022-03-18 02:39:04,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-18 02:39:04,126 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 6.673469387755102) internal successors, (327), 48 states have internal predecessors, (327), 48 states have call successors, (140), 48 states have call predecessors, (140), 46 states have return successors, (138), 46 states have call predecessors, (138), 47 states have call successors, (138) Word has length 878 [2022-03-18 02:39:04,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:39:04,135 INFO L225 Difference]: With dead ends: 5292 [2022-03-18 02:39:04,135 INFO L226 Difference]: Without dead ends: 5283 [2022-03-18 02:39:04,136 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1800 GetRequests, 1702 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1088 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3716, Invalid=5986, Unknown=0, NotChecked=0, Total=9702 [2022-03-18 02:39:04,136 INFO L912 BasicCegarLoop]: 167 mSDtfsCounter, 205 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 02:39:04,136 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 662 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 02:39:04,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5283 states. [2022-03-18 02:39:05,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5283 to 5281. [2022-03-18 02:39:05,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5281 states, 3417 states have (on average 1.0939420544337137) internal successors, (3738), 3545 states have internal predecessors, (3738), 1228 states have call successors, (1228), 636 states have call predecessors, (1228), 635 states have return successors, (1225), 1099 states have call predecessors, (1225), 1225 states have call successors, (1225) [2022-03-18 02:39:05,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5281 states to 5281 states and 6191 transitions. [2022-03-18 02:39:05,567 INFO L78 Accepts]: Start accepts. Automaton has 5281 states and 6191 transitions. Word has length 878 [2022-03-18 02:39:05,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:39:05,568 INFO L478 AbstractCegarLoop]: Abstraction has 5281 states and 6191 transitions. [2022-03-18 02:39:05,568 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 6.673469387755102) internal successors, (327), 48 states have internal predecessors, (327), 48 states have call successors, (140), 48 states have call predecessors, (140), 46 states have return successors, (138), 46 states have call predecessors, (138), 47 states have call successors, (138) [2022-03-18 02:39:05,568 INFO L276 IsEmpty]: Start isEmpty. Operand 5281 states and 6191 transitions. [2022-03-18 02:39:05,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 898 [2022-03-18 02:39:05,583 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:39:05,583 INFO L500 BasicCegarLoop]: trace histogram [139, 138, 138, 47, 46, 46, 46, 46, 46, 46, 46, 46, 46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:39:05,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-03-18 02:39:05,783 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-03-18 02:39:05,784 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:39:05,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:39:05,784 INFO L85 PathProgramCache]: Analyzing trace with hash 942331265, now seen corresponding path program 91 times [2022-03-18 02:39:05,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:39:05,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1884845331] [2022-03-18 02:39:05,785 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:39:05,785 INFO L85 PathProgramCache]: Analyzing trace with hash 942331265, now seen corresponding path program 92 times [2022-03-18 02:39:05,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:39:05,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200290003] [2022-03-18 02:39:05,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:39:05,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:39:05,798 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:39:05,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1749960631] [2022-03-18 02:39:05,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:39:05,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:39:05,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:39:05,799 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:39:05,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-18 02:39:06,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:39:06,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:39:06,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 1939 conjuncts, 97 conjunts are in the unsatisfiable core [2022-03-18 02:39:06,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:39:07,978 INFO L134 CoverageAnalysis]: Checked inductivity of 45429 backedges. 276 proven. 44597 refuted. 0 times theorem prover too weak. 556 trivial. 0 not checked. [2022-03-18 02:39:07,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:39:09,307 INFO L134 CoverageAnalysis]: Checked inductivity of 45429 backedges. 276 proven. 7337 refuted. 0 times theorem prover too weak. 37816 trivial. 0 not checked. [2022-03-18 02:39:09,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:39:09,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200290003] [2022-03-18 02:39:09,307 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:39:09,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749960631] [2022-03-18 02:39:09,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749960631] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:39:09,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:39:09,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 54 [2022-03-18 02:39:09,308 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:39:09,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1884845331] [2022-03-18 02:39:09,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1884845331] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:39:09,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:39:09,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-03-18 02:39:09,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295333180] [2022-03-18 02:39:09,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:39:09,308 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-18 02:39:09,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:39:09,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-18 02:39:09,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-18 02:39:09,310 INFO L87 Difference]: Start difference. First operand 5281 states and 6191 transitions. Second operand has 50 states, 50 states have (on average 6.68) internal successors, (334), 49 states have internal predecessors, (334), 49 states have call successors, (143), 49 states have call predecessors, (143), 47 states have return successors, (141), 47 states have call predecessors, (141), 48 states have call successors, (141) [2022-03-18 02:39:12,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:39:12,176 INFO L93 Difference]: Finished difference Result 5410 states and 6352 transitions. [2022-03-18 02:39:12,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-03-18 02:39:12,176 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 6.68) internal successors, (334), 49 states have internal predecessors, (334), 49 states have call successors, (143), 49 states have call predecessors, (143), 47 states have return successors, (141), 47 states have call predecessors, (141), 48 states have call successors, (141) Word has length 897 [2022-03-18 02:39:12,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:39:12,185 INFO L225 Difference]: With dead ends: 5410 [2022-03-18 02:39:12,185 INFO L226 Difference]: Without dead ends: 5401 [2022-03-18 02:39:12,186 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1839 GetRequests, 1740 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3769, Invalid=6131, Unknown=0, NotChecked=0, Total=9900 [2022-03-18 02:39:12,186 INFO L912 BasicCegarLoop]: 170 mSDtfsCounter, 181 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 02:39:12,186 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 664 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 02:39:12,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5401 states. [2022-03-18 02:39:13,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5401 to 5399. [2022-03-18 02:39:13,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5399 states, 3493 states have (on average 1.093902089894074) internal successors, (3821), 3624 states have internal predecessors, (3821), 1256 states have call successors, (1256), 650 states have call predecessors, (1256), 649 states have return successors, (1253), 1124 states have call predecessors, (1253), 1253 states have call successors, (1253) [2022-03-18 02:39:13,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5399 states to 5399 states and 6330 transitions. [2022-03-18 02:39:13,617 INFO L78 Accepts]: Start accepts. Automaton has 5399 states and 6330 transitions. Word has length 897 [2022-03-18 02:39:13,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:39:13,617 INFO L478 AbstractCegarLoop]: Abstraction has 5399 states and 6330 transitions. [2022-03-18 02:39:13,618 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 6.68) internal successors, (334), 49 states have internal predecessors, (334), 49 states have call successors, (143), 49 states have call predecessors, (143), 47 states have return successors, (141), 47 states have call predecessors, (141), 48 states have call successors, (141) [2022-03-18 02:39:13,618 INFO L276 IsEmpty]: Start isEmpty. Operand 5399 states and 6330 transitions. [2022-03-18 02:39:13,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 917 [2022-03-18 02:39:13,628 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:39:13,628 INFO L500 BasicCegarLoop]: trace histogram [142, 141, 141, 48, 47, 47, 47, 47, 47, 47, 47, 47, 47, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:39:13,646 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-03-18 02:39:13,828 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-03-18 02:39:13,829 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:39:13,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:39:13,829 INFO L85 PathProgramCache]: Analyzing trace with hash -361379470, now seen corresponding path program 93 times [2022-03-18 02:39:13,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:39:13,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [110029796] [2022-03-18 02:39:13,830 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:39:13,830 INFO L85 PathProgramCache]: Analyzing trace with hash -361379470, now seen corresponding path program 94 times [2022-03-18 02:39:13,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:39:13,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437317123] [2022-03-18 02:39:13,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:39:13,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:39:13,842 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:39:13,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1468498177] [2022-03-18 02:39:13,842 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:39:13,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:39:13,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:39:13,844 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:39:13,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-18 02:39:14,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:39:14,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:39:14,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 1979 conjuncts, 99 conjunts are in the unsatisfiable core [2022-03-18 02:39:14,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:39:16,126 INFO L134 CoverageAnalysis]: Checked inductivity of 47427 backedges. 282 proven. 46577 refuted. 0 times theorem prover too weak. 568 trivial. 0 not checked. [2022-03-18 02:39:16,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:39:17,430 INFO L134 CoverageAnalysis]: Checked inductivity of 47427 backedges. 282 proven. 7661 refuted. 0 times theorem prover too weak. 39484 trivial. 0 not checked. [2022-03-18 02:39:17,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:39:17,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437317123] [2022-03-18 02:39:17,431 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:39:17,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468498177] [2022-03-18 02:39:17,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468498177] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:39:17,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:39:17,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 54 [2022-03-18 02:39:17,431 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:39:17,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [110029796] [2022-03-18 02:39:17,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [110029796] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:39:17,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:39:17,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-03-18 02:39:17,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579517955] [2022-03-18 02:39:17,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:39:17,432 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-18 02:39:17,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:39:17,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-18 02:39:17,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-18 02:39:17,433 INFO L87 Difference]: Start difference. First operand 5399 states and 6330 transitions. Second operand has 51 states, 51 states have (on average 6.686274509803922) internal successors, (341), 50 states have internal predecessors, (341), 50 states have call successors, (146), 50 states have call predecessors, (146), 48 states have return successors, (144), 48 states have call predecessors, (144), 49 states have call successors, (144) [2022-03-18 02:39:20,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:39:20,439 INFO L93 Difference]: Finished difference Result 5528 states and 6491 transitions. [2022-03-18 02:39:20,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-03-18 02:39:20,439 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 6.686274509803922) internal successors, (341), 50 states have internal predecessors, (341), 50 states have call successors, (146), 50 states have call predecessors, (146), 48 states have return successors, (144), 48 states have call predecessors, (144), 49 states have call successors, (144) Word has length 916 [2022-03-18 02:39:20,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:39:20,448 INFO L225 Difference]: With dead ends: 5528 [2022-03-18 02:39:20,448 INFO L226 Difference]: Without dead ends: 5519 [2022-03-18 02:39:20,449 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1878 GetRequests, 1778 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1179 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3822, Invalid=6278, Unknown=0, NotChecked=0, Total=10100 [2022-03-18 02:39:20,450 INFO L912 BasicCegarLoop]: 173 mSDtfsCounter, 202 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 02:39:20,450 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 676 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 734 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 02:39:20,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5519 states. [2022-03-18 02:39:21,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5519 to 5517. [2022-03-18 02:39:21,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5517 states, 3569 states have (on average 1.0938638274026338) internal successors, (3904), 3703 states have internal predecessors, (3904), 1284 states have call successors, (1284), 664 states have call predecessors, (1284), 663 states have return successors, (1281), 1149 states have call predecessors, (1281), 1281 states have call successors, (1281) [2022-03-18 02:39:21,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5517 states to 5517 states and 6469 transitions. [2022-03-18 02:39:21,917 INFO L78 Accepts]: Start accepts. Automaton has 5517 states and 6469 transitions. Word has length 916 [2022-03-18 02:39:21,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:39:21,917 INFO L478 AbstractCegarLoop]: Abstraction has 5517 states and 6469 transitions. [2022-03-18 02:39:21,918 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 6.686274509803922) internal successors, (341), 50 states have internal predecessors, (341), 50 states have call successors, (146), 50 states have call predecessors, (146), 48 states have return successors, (144), 48 states have call predecessors, (144), 49 states have call successors, (144) [2022-03-18 02:39:21,918 INFO L276 IsEmpty]: Start isEmpty. Operand 5517 states and 6469 transitions. [2022-03-18 02:39:21,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 936 [2022-03-18 02:39:21,929 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:39:21,929 INFO L500 BasicCegarLoop]: trace histogram [145, 144, 144, 49, 48, 48, 48, 48, 48, 48, 48, 48, 48, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:39:21,948 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-03-18 02:39:22,129 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:39:22,130 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:39:22,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:39:22,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1648179743, now seen corresponding path program 95 times [2022-03-18 02:39:22,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:39:22,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1354590934] [2022-03-18 02:39:22,136 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:39:22,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1648179743, now seen corresponding path program 96 times [2022-03-18 02:39:22,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:39:22,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675355579] [2022-03-18 02:39:22,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:39:22,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:39:22,149 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:39:22,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [621651071] [2022-03-18 02:39:22,149 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:39:22,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:39:22,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:39:22,156 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:39:22,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-18 02:39:23,709 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2022-03-18 02:39:23,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:39:23,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 2019 conjuncts, 101 conjunts are in the unsatisfiable core [2022-03-18 02:39:23,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:39:25,793 INFO L134 CoverageAnalysis]: Checked inductivity of 49468 backedges. 288 proven. 48600 refuted. 0 times theorem prover too weak. 580 trivial. 0 not checked. [2022-03-18 02:39:25,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:39:27,128 INFO L134 CoverageAnalysis]: Checked inductivity of 49468 backedges. 288 proven. 7992 refuted. 0 times theorem prover too weak. 41188 trivial. 0 not checked. [2022-03-18 02:39:27,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:39:27,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675355579] [2022-03-18 02:39:27,128 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:39:27,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621651071] [2022-03-18 02:39:27,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621651071] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:39:27,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:39:27,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 54 [2022-03-18 02:39:27,129 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:39:27,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1354590934] [2022-03-18 02:39:27,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1354590934] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:39:27,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:39:27,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-03-18 02:39:27,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858973248] [2022-03-18 02:39:27,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:39:27,130 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-03-18 02:39:27,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:39:27,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-03-18 02:39:27,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-18 02:39:27,131 INFO L87 Difference]: Start difference. First operand 5517 states and 6469 transitions. Second operand has 52 states, 52 states have (on average 6.6923076923076925) internal successors, (348), 51 states have internal predecessors, (348), 51 states have call successors, (149), 51 states have call predecessors, (149), 49 states have return successors, (147), 49 states have call predecessors, (147), 50 states have call successors, (147) [2022-03-18 02:39:30,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:39:30,104 INFO L93 Difference]: Finished difference Result 5646 states and 6630 transitions. [2022-03-18 02:39:30,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-03-18 02:39:30,105 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 6.6923076923076925) internal successors, (348), 51 states have internal predecessors, (348), 51 states have call successors, (149), 51 states have call predecessors, (149), 49 states have return successors, (147), 49 states have call predecessors, (147), 50 states have call successors, (147) Word has length 935 [2022-03-18 02:39:30,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:39:30,116 INFO L225 Difference]: With dead ends: 5646 [2022-03-18 02:39:30,116 INFO L226 Difference]: Without dead ends: 5637 [2022-03-18 02:39:30,118 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1917 GetRequests, 1816 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1226 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3875, Invalid=6427, Unknown=0, NotChecked=0, Total=10302 [2022-03-18 02:39:30,118 INFO L912 BasicCegarLoop]: 176 mSDtfsCounter, 187 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 02:39:30,118 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 698 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 02:39:30,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5637 states. [2022-03-18 02:39:31,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5637 to 5635. [2022-03-18 02:39:31,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5635 states, 3645 states have (on average 1.0938271604938272) internal successors, (3987), 3782 states have internal predecessors, (3987), 1312 states have call successors, (1312), 678 states have call predecessors, (1312), 677 states have return successors, (1309), 1174 states have call predecessors, (1309), 1309 states have call successors, (1309) [2022-03-18 02:39:31,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5635 states to 5635 states and 6608 transitions. [2022-03-18 02:39:31,637 INFO L78 Accepts]: Start accepts. Automaton has 5635 states and 6608 transitions. Word has length 935 [2022-03-18 02:39:31,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:39:31,638 INFO L478 AbstractCegarLoop]: Abstraction has 5635 states and 6608 transitions. [2022-03-18 02:39:31,638 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 6.6923076923076925) internal successors, (348), 51 states have internal predecessors, (348), 51 states have call successors, (149), 51 states have call predecessors, (149), 49 states have return successors, (147), 49 states have call predecessors, (147), 50 states have call successors, (147) [2022-03-18 02:39:31,638 INFO L276 IsEmpty]: Start isEmpty. Operand 5635 states and 6608 transitions. [2022-03-18 02:39:31,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 955 [2022-03-18 02:39:31,649 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:39:31,649 INFO L500 BasicCegarLoop]: trace histogram [148, 147, 147, 50, 49, 49, 49, 49, 49, 49, 49, 49, 49, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:39:31,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-03-18 02:39:31,849 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:39:31,850 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:39:31,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:39:31,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1831353618, now seen corresponding path program 97 times [2022-03-18 02:39:31,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:39:31,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [823608008] [2022-03-18 02:39:31,851 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:39:31,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1831353618, now seen corresponding path program 98 times [2022-03-18 02:39:31,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:39:31,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454455638] [2022-03-18 02:39:31,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:39:31,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:39:31,867 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:39:31,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [945435835] [2022-03-18 02:39:31,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:39:31,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:39:31,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:39:31,869 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:39:31,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-18 02:39:32,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:39:32,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:39:32,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 2059 conjuncts, 103 conjunts are in the unsatisfiable core [2022-03-18 02:39:32,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:39:34,379 INFO L134 CoverageAnalysis]: Checked inductivity of 51552 backedges. 294 proven. 50666 refuted. 0 times theorem prover too weak. 592 trivial. 0 not checked. [2022-03-18 02:39:34,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:39:35,681 INFO L134 CoverageAnalysis]: Checked inductivity of 51552 backedges. 294 proven. 8330 refuted. 0 times theorem prover too weak. 42928 trivial. 0 not checked. [2022-03-18 02:39:35,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:39:35,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454455638] [2022-03-18 02:39:35,681 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:39:35,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945435835] [2022-03-18 02:39:35,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945435835] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:39:35,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:39:35,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2022-03-18 02:39:35,682 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:39:35,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [823608008] [2022-03-18 02:39:35,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [823608008] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:39:35,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:39:35,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-03-18 02:39:35,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782868344] [2022-03-18 02:39:35,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:39:35,683 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-18 02:39:35,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:39:35,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-18 02:39:35,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-03-18 02:39:35,684 INFO L87 Difference]: Start difference. First operand 5635 states and 6608 transitions. Second operand has 53 states, 53 states have (on average 6.69811320754717) internal successors, (355), 52 states have internal predecessors, (355), 52 states have call successors, (152), 52 states have call predecessors, (152), 50 states have return successors, (150), 50 states have call predecessors, (150), 51 states have call successors, (150) [2022-03-18 02:39:38,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:39:38,830 INFO L93 Difference]: Finished difference Result 5764 states and 6769 transitions. [2022-03-18 02:39:38,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-03-18 02:39:38,831 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 6.69811320754717) internal successors, (355), 52 states have internal predecessors, (355), 52 states have call successors, (152), 52 states have call predecessors, (152), 50 states have return successors, (150), 50 states have call predecessors, (150), 51 states have call successors, (150) Word has length 954 [2022-03-18 02:39:38,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:39:38,840 INFO L225 Difference]: With dead ends: 5764 [2022-03-18 02:39:38,840 INFO L226 Difference]: Without dead ends: 5755 [2022-03-18 02:39:38,842 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1956 GetRequests, 1855 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3876, Invalid=6426, Unknown=0, NotChecked=0, Total=10302 [2022-03-18 02:39:38,842 INFO L912 BasicCegarLoop]: 179 mSDtfsCounter, 177 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 02:39:38,842 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 730 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 02:39:38,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5755 states. [2022-03-18 02:39:40,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5755 to 5753. [2022-03-18 02:39:40,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 3721 states have (on average 1.0937919914001613) internal successors, (4070), 3861 states have internal predecessors, (4070), 1340 states have call successors, (1340), 692 states have call predecessors, (1340), 691 states have return successors, (1337), 1199 states have call predecessors, (1337), 1337 states have call successors, (1337) [2022-03-18 02:39:40,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 6747 transitions. [2022-03-18 02:39:40,402 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 6747 transitions. Word has length 954 [2022-03-18 02:39:40,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:39:40,403 INFO L478 AbstractCegarLoop]: Abstraction has 5753 states and 6747 transitions. [2022-03-18 02:39:40,403 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 6.69811320754717) internal successors, (355), 52 states have internal predecessors, (355), 52 states have call successors, (152), 52 states have call predecessors, (152), 50 states have return successors, (150), 50 states have call predecessors, (150), 51 states have call successors, (150) [2022-03-18 02:39:40,403 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 6747 transitions. [2022-03-18 02:39:40,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 974 [2022-03-18 02:39:40,418 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:39:40,419 INFO L500 BasicCegarLoop]: trace histogram [151, 150, 150, 51, 50, 50, 50, 50, 50, 50, 50, 50, 50, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:39:40,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-03-18 02:39:40,619 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:39:40,619 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:39:40,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:39:40,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1648586305, now seen corresponding path program 99 times [2022-03-18 02:39:40,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:39:40,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1235360943] [2022-03-18 02:39:40,621 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:39:40,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1648586305, now seen corresponding path program 100 times [2022-03-18 02:39:40,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:39:40,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092502165] [2022-03-18 02:39:40,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:39:40,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:39:40,635 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:39:40,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [480668039] [2022-03-18 02:39:40,635 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:39:40,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:39:40,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:39:40,637 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:39:40,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-18 02:39:40,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:39:40,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-03-18 02:39:40,930 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 02:39:41,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 02:39:41,510 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 02:39:41,511 INFO L130 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found a feasible trace [2022-03-18 02:39:41,511 INFO L614 BasicCegarLoop]: Counterexample is feasible [2022-03-18 02:39:41,518 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-18 02:39:41,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-03-18 02:39:41,739 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:39:41,742 INFO L718 BasicCegarLoop]: Path program histogram: [100, 36, 10, 4, 2, 2, 2, 2, 2, 2, 2] [2022-03-18 02:39:41,746 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-18 02:39:41,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 02:39:41 BoogieIcfgContainer [2022-03-18 02:39:41,807 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-18 02:39:41,808 INFO L158 Benchmark]: Toolchain (without parser) took 515568.06ms. Allocated memory was 166.7MB in the beginning and 1.1GB in the end (delta: 976.2MB). Free memory was 114.9MB in the beginning and 814.8MB in the end (delta: -699.9MB). Peak memory consumption was 276.4MB. Max. memory is 8.0GB. [2022-03-18 02:39:41,808 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 166.7MB. Free memory was 131.3MB in the beginning and 131.2MB in the end (delta: 74.5kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-18 02:39:41,808 INFO L158 Benchmark]: CACSL2BoogieTranslator took 226.76ms. Allocated memory is still 166.7MB. Free memory was 114.7MB in the beginning and 142.8MB in the end (delta: -28.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-18 02:39:41,808 INFO L158 Benchmark]: Boogie Preprocessor took 40.81ms. Allocated memory is still 166.7MB. Free memory was 142.8MB in the beginning and 141.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-18 02:39:41,808 INFO L158 Benchmark]: RCFGBuilder took 294.89ms. Allocated memory is still 166.7MB. Free memory was 141.2MB in the beginning and 130.7MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-18 02:39:41,808 INFO L158 Benchmark]: TraceAbstraction took 514998.65ms. Allocated memory was 166.7MB in the beginning and 1.1GB in the end (delta: 976.2MB). Free memory was 130.2MB in the beginning and 815.4MB in the end (delta: -685.2MB). Peak memory consumption was 292.3MB. Max. memory is 8.0GB. [2022-03-18 02:39:41,809 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 166.7MB. Free memory was 131.3MB in the beginning and 131.2MB in the end (delta: 74.5kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 226.76ms. Allocated memory is still 166.7MB. Free memory was 114.7MB in the beginning and 142.8MB in the end (delta: -28.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 40.81ms. Allocated memory is still 166.7MB. Free memory was 142.8MB in the beginning and 141.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 294.89ms. Allocated memory is still 166.7MB. Free memory was 141.2MB in the beginning and 130.7MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 514998.65ms. Allocated memory was 166.7MB in the beginning and 1.1GB in the end (delta: 976.2MB). Free memory was 130.2MB in the beginning and 815.4MB in the end (delta: -685.2MB). Peak memory consumption was 292.3MB. 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] long long a, b, p, q, r, s; [L21] int x, y; [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++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(1 == p * s - r * q) [L36] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(a == y * r + x * p) [L37] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(b == x * q + y * s) [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s [L34] EXPR counter++ [L34] COND FALSE !(counter++<50) [L53] CALL __VERIFIER_assert(a - b == 0) [L11] COND TRUE !(cond) [L13] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 514.9s, OverallIterations: 82, TraceHistogramMax: 151, PathProgramHistogramMax: 100, EmptinessCheckTime: 0.4s, AutomataDifference: 128.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 9 mSolverCounterUnknown, 5221 SdHoareTripleChecker+Valid, 55.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5033 mSDsluCounter, 29555 SdHoareTripleChecker+Invalid, 51.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 22828 mSDsCounter, 1511 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 26347 IncrementalHoareTripleChecker+Invalid, 27867 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1511 mSolverCounterUnsat, 6727 mSDtfsCounter, 26347 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 54372 GetRequests, 50680 SyntacticMatches, 73 SemanticMatches, 3619 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23752 ImplicationChecksByTransitivity, 102.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=5753occurred in iteration=81, InterpolantAutomatonStates: 2936, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 41.4s AutomataMinimizationTime, 81 MinimizatonAttempts, 632 StatesRemovedByMinimization, 76 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! [2022-03-18 02:39:41,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...