/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_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 22:18:10,249 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 22:18:10,251 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 22:18:10,300 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 22:18:10,351 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 22:18:10,352 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 22:18:10,354 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 22:18:10,354 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-06 22:18:10,364 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 22:18:10,365 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 22:18:10,366 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 22:18:10,366 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 22:18:10,366 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 22:18:10,366 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 22:18:10,367 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 22:18:10,367 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 22:18:10,367 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 22:18:10,368 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 22:18:10,368 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 22:18:10,368 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 22:18:10,368 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 22:18:10,368 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 22:18:10,368 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 22:18:10,368 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 22:18:10,369 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 22:18:10,369 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 22:18:10,369 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 22:18:10,369 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 22:18:10,369 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 22:18:10,369 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 22:18:10,369 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 22:18:10,633 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 22:18:10,663 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 22:18:10,665 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 22:18:10,666 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 22:18:10,667 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 22:18:10,668 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound10.c [2022-04-06 22:18:10,729 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f527ecfbc/4fbf1c28bea849eb849b4c959b8c330b/FLAG095bf8415 [2022-04-06 22:18:11,130 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 22:18:11,130 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound10.c [2022-04-06 22:18:11,136 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f527ecfbc/4fbf1c28bea849eb849b4c959b8c330b/FLAG095bf8415 [2022-04-06 22:18:11,536 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f527ecfbc/4fbf1c28bea849eb849b4c959b8c330b [2022-04-06 22:18:11,538 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 22:18:11,539 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 22:18:11,544 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 22:18:11,544 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 22:18:11,547 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 22:18:11,548 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 10:18:11" (1/1) ... [2022-04-06 22:18:11,548 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34d21c98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:18:11, skipping insertion in model container [2022-04-06 22:18:11,549 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 10:18:11" (1/1) ... [2022-04-06 22:18:11,558 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 22:18:11,575 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 22:18:11,766 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_unwindbound10.c[489,502] [2022-04-06 22:18:11,797 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 22:18:11,805 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 22:18:11,816 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_unwindbound10.c[489,502] [2022-04-06 22:18:11,839 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 22:18:11,850 INFO L208 MainTranslator]: Completed translation [2022-04-06 22:18:11,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:18:11 WrapperNode [2022-04-06 22:18:11,851 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 22:18:11,854 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 22:18:11,854 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 22:18:11,855 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 22:18:11,864 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:18:11" (1/1) ... [2022-04-06 22:18:11,865 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:18:11" (1/1) ... [2022-04-06 22:18:11,871 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:18:11" (1/1) ... [2022-04-06 22:18:11,872 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:18:11" (1/1) ... [2022-04-06 22:18:11,883 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:18:11" (1/1) ... [2022-04-06 22:18:11,888 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:18:11" (1/1) ... [2022-04-06 22:18:11,894 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:18:11" (1/1) ... [2022-04-06 22:18:11,897 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 22:18:11,898 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 22:18:11,898 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 22:18:11,898 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 22:18:11,899 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:18:11" (1/1) ... [2022-04-06 22:18:11,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 22:18:11,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:18:11,933 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 22:18:11,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 22:18:11,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 22:18:11,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 22:18:11,981 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 22:18:11,981 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 22:18:11,982 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 22:18:11,982 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 22:18:11,982 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 22:18:11,982 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 22:18:11,982 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 22:18:11,982 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 22:18:11,982 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 22:18:11,983 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 22:18:11,983 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 22:18:11,983 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 22:18:11,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 22:18:11,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 22:18:11,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 22:18:11,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 22:18:11,985 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 22:18:11,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 22:18:12,048 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 22:18:12,049 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 22:18:12,213 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 22:18:12,218 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 22:18:12,219 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 22:18:12,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 10:18:12 BoogieIcfgContainer [2022-04-06 22:18:12,221 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 22:18:12,222 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 22:18:12,222 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 22:18:12,235 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 22:18:12,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 10:18:11" (1/3) ... [2022-04-06 22:18:12,236 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17f2473d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 10:18:12, skipping insertion in model container [2022-04-06 22:18:12,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:18:11" (2/3) ... [2022-04-06 22:18:12,237 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17f2473d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 10:18:12, skipping insertion in model container [2022-04-06 22:18:12,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 10:18:12" (3/3) ... [2022-04-06 22:18:12,238 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_unwindbound10.c [2022-04-06 22:18:12,242 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 22:18:12,243 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 22:18:12,316 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 22:18:12,322 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 22:18:12,322 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 22:18:12,343 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) [2022-04-06 22:18:12,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 22:18:12,360 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:18:12,360 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:18:12,361 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:18:12,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:18:12,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1226702723, now seen corresponding path program 1 times [2022-04-06 22:18:12,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:12,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [498483677] [2022-04-06 22:18:12,387 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:18:12,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1226702723, now seen corresponding path program 2 times [2022-04-06 22:18:12,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:18:12,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404579780] [2022-04-06 22:18:12,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:18:12,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:18:12,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 22:18:12,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 22:18:12,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 22:18:12,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 22:18:12,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 22:18:12,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 22:18:12,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 22:18:12,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 22:18:12,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:18:12,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404579780] [2022-04-06 22:18:12,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404579780] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:18:12,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:18:12,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 22:18:12,618 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:18:12,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [498483677] [2022-04-06 22:18:12,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [498483677] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:18:12,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:18:12,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 22:18:12,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643903987] [2022-04-06 22:18:12,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:18:12,624 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 22:18:12,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:12,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 22:18:12,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 22:18:12,648 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) [2022-04-06 22:18:12,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:18:12,744 INFO L93 Difference]: Finished difference Result 64 states and 97 transitions. [2022-04-06 22:18:12,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 22:18:12,747 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-04-06 22:18:12,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:18:12,753 INFO L225 Difference]: With dead ends: 64 [2022-04-06 22:18:12,753 INFO L226 Difference]: Without dead ends: 31 [2022-04-06 22:18:12,758 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 22:18:12,764 INFO L913 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 [2022-04-06 22:18:12,766 INFO L914 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] [2022-04-06 22:18:12,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-04-06 22:18:12,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2022-04-06 22:18:12,812 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) [2022-04-06 22:18:12,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2022-04-06 22:18:12,816 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 22 [2022-04-06 22:18:12,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:18:12,817 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2022-04-06 22:18:12,818 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 22:18:12,818 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2022-04-06 22:18:12,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 22:18:12,820 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:18:12,821 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:18:12,821 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 22:18:12,822 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:18:12,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:18:12,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1346542817, now seen corresponding path program 1 times [2022-04-06 22:18:12,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:12,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1180918558] [2022-04-06 22:18:12,828 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:18:12,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1346542817, now seen corresponding path program 2 times [2022-04-06 22:18:12,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:18:12,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617732820] [2022-04-06 22:18:12,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:18:12,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:18:12,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 22:18:12,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 22:18:12,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 22:18:12,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 22:18:12,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 22:18:12,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 22:18:12,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 22:18:12,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 22:18:12,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:18:12,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617732820] [2022-04-06 22:18:12,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617732820] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:18:12,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:18:12,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:18:12,999 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:18:12,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1180918558] [2022-04-06 22:18:12,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1180918558] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:18:12,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:18:13,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:18:13,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037429430] [2022-04-06 22:18:13,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:18:13,001 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 22:18:13,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:13,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 22:18:13,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 22:18:13,002 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) [2022-04-06 22:18:13,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:18:13,135 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2022-04-06 22:18:13,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 22:18:13,138 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 [2022-04-06 22:18:13,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:18:13,139 INFO L225 Difference]: With dead ends: 42 [2022-04-06 22:18:13,139 INFO L226 Difference]: Without dead ends: 32 [2022-04-06 22:18:13,140 INFO L912 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 [2022-04-06 22:18:13,141 INFO L913 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 [2022-04-06 22:18:13,142 INFO L914 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] [2022-04-06 22:18:13,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-04-06 22:18:13,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-04-06 22:18:13,152 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) [2022-04-06 22:18:13,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-04-06 22:18:13,154 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 23 [2022-04-06 22:18:13,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:18:13,156 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-04-06 22:18:13,156 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) [2022-04-06 22:18:13,156 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-04-06 22:18:13,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 22:18:13,157 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:18:13,157 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:18:13,157 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 22:18:13,157 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:18:13,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:18:13,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1348211113, now seen corresponding path program 1 times [2022-04-06 22:18:13,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:13,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [146273942] [2022-04-06 22:18:13,164 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:18:13,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1348211113, now seen corresponding path program 2 times [2022-04-06 22:18:13,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:18:13,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446759247] [2022-04-06 22:18:13,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:18:13,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:18:13,191 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:18:13,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1028843739] [2022-04-06 22:18:13,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:18:13,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:18:13,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:18:13,200 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:18:13,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 22:18:13,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 22:18:13,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:18:13,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 22:18:13,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:18:13,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 22:18:13,436 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 22:18:13,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:18:13,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446759247] [2022-04-06 22:18:13,437 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:18:13,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028843739] [2022-04-06 22:18:13,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028843739] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:18:13,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:18:13,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:18:13,438 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:18:13,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [146273942] [2022-04-06 22:18:13,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [146273942] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:18:13,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:18:13,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:18:13,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798782066] [2022-04-06 22:18:13,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:18:13,441 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 22:18:13,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:13,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 22:18:13,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 22:18:13,442 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) [2022-04-06 22:18:13,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:18:13,511 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2022-04-06 22:18:13,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 22:18:13,512 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 [2022-04-06 22:18:13,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:18:13,515 INFO L225 Difference]: With dead ends: 49 [2022-04-06 22:18:13,515 INFO L226 Difference]: Without dead ends: 47 [2022-04-06 22:18:13,516 INFO L912 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 [2022-04-06 22:18:13,522 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 8 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 22:18:13,527 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 134 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 22:18:13,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-04-06 22:18:13,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-04-06 22:18:13,542 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) [2022-04-06 22:18:13,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2022-04-06 22:18:13,543 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 23 [2022-04-06 22:18:13,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:18:13,543 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2022-04-06 22:18:13,543 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) [2022-04-06 22:18:13,545 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2022-04-06 22:18:13,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 22:18:13,546 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:18:13,546 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:18:13,572 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-06 22:18:13,759 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 [2022-04-06 22:18:13,760 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:18:13,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:18:13,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1060153012, now seen corresponding path program 1 times [2022-04-06 22:18:13,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:13,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1689357074] [2022-04-06 22:18:13,761 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:18:13,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1060153012, now seen corresponding path program 2 times [2022-04-06 22:18:13,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:18:13,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759843924] [2022-04-06 22:18:13,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:18:13,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:18:13,774 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:18:13,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1629110883] [2022-04-06 22:18:13,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:18:13,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:18:13,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:18:13,775 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:18:13,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 22:18:13,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:18:13,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:18:13,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 22:18:13,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:18:13,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 22:18:13,961 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 22:18:13,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:18:13,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759843924] [2022-04-06 22:18:13,961 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:18:13,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629110883] [2022-04-06 22:18:13,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629110883] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:18:13,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:18:13,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:18:13,962 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:18:13,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1689357074] [2022-04-06 22:18:13,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1689357074] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:18:13,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:18:13,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:18:13,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826925896] [2022-04-06 22:18:13,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:18:13,968 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 22:18:13,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:13,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 22:18:13,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 22:18:13,971 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) [2022-04-06 22:18:14,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:18:14,038 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2022-04-06 22:18:14,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 22:18:14,038 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 [2022-04-06 22:18:14,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:18:14,041 INFO L225 Difference]: With dead ends: 53 [2022-04-06 22:18:14,041 INFO L226 Difference]: Without dead ends: 51 [2022-04-06 22:18:14,042 INFO L912 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 [2022-04-06 22:18:14,044 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 9 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 22:18:14,045 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 138 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 22:18:14,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-04-06 22:18:14,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-04-06 22:18:14,060 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) [2022-04-06 22:18:14,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 66 transitions. [2022-04-06 22:18:14,063 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 66 transitions. Word has length 28 [2022-04-06 22:18:14,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:18:14,063 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 66 transitions. [2022-04-06 22:18:14,063 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) [2022-04-06 22:18:14,064 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 66 transitions. [2022-04-06 22:18:14,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 22:18:14,065 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:18:14,065 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:18:14,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 22:18:14,289 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 [2022-04-06 22:18:14,290 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:18:14,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:18:14,290 INFO L85 PathProgramCache]: Analyzing trace with hash -560761015, now seen corresponding path program 1 times [2022-04-06 22:18:14,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:14,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1767671962] [2022-04-06 22:18:14,291 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:18:14,291 INFO L85 PathProgramCache]: Analyzing trace with hash -560761015, now seen corresponding path program 2 times [2022-04-06 22:18:14,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:18:14,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909251518] [2022-04-06 22:18:14,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:18:14,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:18:14,306 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:18:14,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1388623973] [2022-04-06 22:18:14,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:18:14,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:18:14,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:18:14,308 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:18:14,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 22:18:14,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:18:14,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:18:14,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 22:18:14,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:18:14,495 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-06 22:18:14,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:18:14,619 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 22:18:14,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:18:14,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909251518] [2022-04-06 22:18:14,619 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:18:14,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388623973] [2022-04-06 22:18:14,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388623973] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 22:18:14,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 22:18:14,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-04-06 22:18:14,620 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:18:14,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1767671962] [2022-04-06 22:18:14,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1767671962] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:18:14,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:18:14,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:18:14,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878163670] [2022-04-06 22:18:14,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:18:14,621 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 22:18:14,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:14,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 22:18:14,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-04-06 22:18:14,622 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) [2022-04-06 22:18:14,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:18:14,695 INFO L93 Difference]: Finished difference Result 75 states and 107 transitions. [2022-04-06 22:18:14,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 22:18:14,695 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 [2022-04-06 22:18:14,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:18:14,698 INFO L225 Difference]: With dead ends: 75 [2022-04-06 22:18:14,698 INFO L226 Difference]: Without dead ends: 71 [2022-04-06 22:18:14,698 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-04-06 22:18:14,699 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 9 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:18:14,699 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 128 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:18:14,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-04-06 22:18:14,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-04-06 22:18:14,710 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) [2022-04-06 22:18:14,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 100 transitions. [2022-04-06 22:18:14,711 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 100 transitions. Word has length 33 [2022-04-06 22:18:14,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:18:14,711 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 100 transitions. [2022-04-06 22:18:14,712 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) [2022-04-06 22:18:14,712 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 100 transitions. [2022-04-06 22:18:14,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 22:18:14,713 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:18:14,713 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:18:14,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 22:18:14,938 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 [2022-04-06 22:18:14,938 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:18:14,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:18:14,939 INFO L85 PathProgramCache]: Analyzing trace with hash 201438379, now seen corresponding path program 1 times [2022-04-06 22:18:14,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:14,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [148127326] [2022-04-06 22:18:14,940 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:18:14,940 INFO L85 PathProgramCache]: Analyzing trace with hash 201438379, now seen corresponding path program 2 times [2022-04-06 22:18:14,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:18:14,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259104589] [2022-04-06 22:18:14,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:18:14,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:18:14,958 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:18:14,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1363833506] [2022-04-06 22:18:14,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:18:14,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:18:14,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:18:14,963 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:18:14,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 22:18:15,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:18:15,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:18:15,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 22:18:15,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:18:15,080 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 22:18:15,081 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 22:18:15,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:18:15,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259104589] [2022-04-06 22:18:15,081 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:18:15,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363833506] [2022-04-06 22:18:15,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363833506] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:18:15,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:18:15,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:18:15,082 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:18:15,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [148127326] [2022-04-06 22:18:15,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [148127326] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:18:15,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:18:15,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:18:15,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712525394] [2022-04-06 22:18:15,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:18:15,082 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 22:18:15,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:15,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 22:18:15,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 22:18:15,083 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) [2022-04-06 22:18:15,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:18:15,126 INFO L93 Difference]: Finished difference Result 87 states and 123 transitions. [2022-04-06 22:18:15,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 22:18:15,126 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 [2022-04-06 22:18:15,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:18:15,128 INFO L225 Difference]: With dead ends: 87 [2022-04-06 22:18:15,128 INFO L226 Difference]: Without dead ends: 85 [2022-04-06 22:18:15,128 INFO L912 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 [2022-04-06 22:18:15,129 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 5 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 22:18:15,129 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 144 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 22:18:15,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-04-06 22:18:15,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 78. [2022-04-06 22:18:15,141 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) [2022-04-06 22:18:15,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 109 transitions. [2022-04-06 22:18:15,142 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 109 transitions. Word has length 39 [2022-04-06 22:18:15,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:18:15,142 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 109 transitions. [2022-04-06 22:18:15,143 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) [2022-04-06 22:18:15,143 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 109 transitions. [2022-04-06 22:18:15,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 22:18:15,144 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:18:15,144 INFO L499 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] [2022-04-06 22:18:15,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 22:18:15,344 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 [2022-04-06 22:18:15,345 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:18:15,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:18:15,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1085077998, now seen corresponding path program 1 times [2022-04-06 22:18:15,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:15,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [938733793] [2022-04-06 22:18:15,346 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:18:15,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1085077998, now seen corresponding path program 2 times [2022-04-06 22:18:15,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:18:15,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776402403] [2022-04-06 22:18:15,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:18:15,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:18:15,355 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:18:15,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [656474960] [2022-04-06 22:18:15,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:18:15,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:18:15,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:18:15,357 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:18:15,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 22:18:15,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:18:15,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:18:15,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 22:18:15,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:18:15,522 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 22:18:15,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:18:15,628 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 22:18:15,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:18:15,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776402403] [2022-04-06 22:18:15,629 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:18:15,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656474960] [2022-04-06 22:18:15,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656474960] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:18:15,629 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:18:15,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-04-06 22:18:15,629 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:18:15,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [938733793] [2022-04-06 22:18:15,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [938733793] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:18:15,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:18:15,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:18:15,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003312938] [2022-04-06 22:18:15,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:18:15,630 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 22:18:15,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:15,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 22:18:15,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-04-06 22:18:15,631 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) [2022-04-06 22:18:15,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:18:15,679 INFO L93 Difference]: Finished difference Result 121 states and 152 transitions. [2022-04-06 22:18:15,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 22:18:15,680 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 [2022-04-06 22:18:15,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:18:15,681 INFO L225 Difference]: With dead ends: 121 [2022-04-06 22:18:15,681 INFO L226 Difference]: Without dead ends: 102 [2022-04-06 22:18:15,682 INFO L912 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 [2022-04-06 22:18:15,682 INFO L913 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 [2022-04-06 22:18:15,682 INFO L914 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] [2022-04-06 22:18:15,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-04-06 22:18:15,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2022-04-06 22:18:15,696 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) [2022-04-06 22:18:15,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 127 transitions. [2022-04-06 22:18:15,697 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 127 transitions. Word has length 42 [2022-04-06 22:18:15,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:18:15,697 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 127 transitions. [2022-04-06 22:18:15,697 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) [2022-04-06 22:18:15,698 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 127 transitions. [2022-04-06 22:18:15,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 22:18:15,714 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:18:15,715 INFO L499 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] [2022-04-06 22:18:15,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 22:18:15,939 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 [2022-04-06 22:18:15,939 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:18:15,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:18:15,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1083409702, now seen corresponding path program 1 times [2022-04-06 22:18:15,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:15,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1941219209] [2022-04-06 22:18:15,940 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:18:15,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1083409702, now seen corresponding path program 2 times [2022-04-06 22:18:15,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:18:15,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423733868] [2022-04-06 22:18:15,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:18:15,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:18:15,949 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:18:15,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [477701955] [2022-04-06 22:18:15,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:18:15,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:18:15,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:18:15,955 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:18:15,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 22:18:15,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:18:15,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:18:15,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 22:18:15,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:18:16,136 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-04-06 22:18:16,137 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 22:18:16,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:18:16,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423733868] [2022-04-06 22:18:16,137 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:18:16,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477701955] [2022-04-06 22:18:16,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477701955] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:18:16,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:18:16,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:18:16,138 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:18:16,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1941219209] [2022-04-06 22:18:16,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1941219209] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:18:16,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:18:16,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:18:16,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918270721] [2022-04-06 22:18:16,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:18:16,139 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 22:18:16,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:16,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 22:18:16,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 22:18:16,140 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) [2022-04-06 22:18:16,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:18:16,184 INFO L93 Difference]: Finished difference Result 106 states and 132 transitions. [2022-04-06 22:18:16,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 22:18:16,184 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 [2022-04-06 22:18:16,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:18:16,185 INFO L225 Difference]: With dead ends: 106 [2022-04-06 22:18:16,185 INFO L226 Difference]: Without dead ends: 103 [2022-04-06 22:18:16,186 INFO L912 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 [2022-04-06 22:18:16,186 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 7 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 22:18:16,187 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 132 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 22:18:16,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-04-06 22:18:16,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-04-06 22:18:16,198 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) [2022-04-06 22:18:16,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2022-04-06 22:18:16,199 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 42 [2022-04-06 22:18:16,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:18:16,200 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2022-04-06 22:18:16,200 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) [2022-04-06 22:18:16,200 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2022-04-06 22:18:16,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 22:18:16,201 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:18:16,201 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:18:16,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 22:18:16,426 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 [2022-04-06 22:18:16,427 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:18:16,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:18:16,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1376219446, now seen corresponding path program 1 times [2022-04-06 22:18:16,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:16,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1152317602] [2022-04-06 22:18:16,428 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:18:16,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1376219446, now seen corresponding path program 2 times [2022-04-06 22:18:16,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:18:16,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419059801] [2022-04-06 22:18:16,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:18:16,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:18:16,437 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:18:16,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [183273492] [2022-04-06 22:18:16,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:18:16,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:18:16,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:18:16,448 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:18:16,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 22:18:16,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:18:16,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:18:16,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 22:18:16,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:18:16,607 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-04-06 22:18:16,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:18:16,801 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-04-06 22:18:16,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:18:16,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419059801] [2022-04-06 22:18:16,801 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:18:16,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183273492] [2022-04-06 22:18:16,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183273492] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:18:16,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:18:16,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-04-06 22:18:16,802 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:18:16,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1152317602] [2022-04-06 22:18:16,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1152317602] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:18:16,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:18:16,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 22:18:16,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422134031] [2022-04-06 22:18:16,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:18:16,803 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 22:18:16,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:16,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 22:18:16,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-04-06 22:18:16,803 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) [2022-04-06 22:18:16,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:18:16,952 INFO L93 Difference]: Finished difference Result 118 states and 148 transitions. [2022-04-06 22:18:16,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 22:18:16,953 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 [2022-04-06 22:18:16,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:18:16,955 INFO L225 Difference]: With dead ends: 118 [2022-04-06 22:18:16,955 INFO L226 Difference]: Without dead ends: 106 [2022-04-06 22:18:16,956 INFO L912 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 [2022-04-06 22:18:16,956 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 16 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:18:16,956 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 122 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:18:16,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-04-06 22:18:16,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2022-04-06 22:18:16,969 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) [2022-04-06 22:18:16,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 130 transitions. [2022-04-06 22:18:16,970 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 130 transitions. Word has length 44 [2022-04-06 22:18:16,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:18:16,970 INFO L478 AbstractCegarLoop]: Abstraction has 104 states and 130 transitions. [2022-04-06 22:18:16,970 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) [2022-04-06 22:18:16,970 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 130 transitions. [2022-04-06 22:18:16,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 22:18:16,971 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:18:16,971 INFO L499 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] [2022-04-06 22:18:16,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 22:18:17,191 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 [2022-04-06 22:18:17,192 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:18:17,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:18:17,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1137310021, now seen corresponding path program 3 times [2022-04-06 22:18:17,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:17,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [794191526] [2022-04-06 22:18:17,193 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:18:17,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1137310021, now seen corresponding path program 4 times [2022-04-06 22:18:17,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:18:17,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287703046] [2022-04-06 22:18:17,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:18:17,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:18:17,201 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:18:17,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [925703335] [2022-04-06 22:18:17,202 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:18:17,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:18:17,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:18:17,203 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:18:17,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 22:18:17,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:18:17,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:18:17,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 22:18:17,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:18:17,559 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 22:18:17,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:18:17,772 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-04-06 22:18:17,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:18:17,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287703046] [2022-04-06 22:18:17,772 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:18:17,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925703335] [2022-04-06 22:18:17,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925703335] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:18:17,773 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:18:17,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-04-06 22:18:17,773 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:18:17,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [794191526] [2022-04-06 22:18:17,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [794191526] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:18:17,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:18:17,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 22:18:17,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926112737] [2022-04-06 22:18:17,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:18:17,774 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 22:18:17,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:17,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 22:18:17,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-04-06 22:18:17,775 INFO L87 Difference]: Start difference. First operand 104 states and 130 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-04-06 22:18:18,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:18:18,033 INFO L93 Difference]: Finished difference Result 131 states and 169 transitions. [2022-04-06 22:18:18,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 22:18:18,034 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 47 [2022-04-06 22:18:18,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:18:18,037 INFO L225 Difference]: With dead ends: 131 [2022-04-06 22:18:18,037 INFO L226 Difference]: Without dead ends: 129 [2022-04-06 22:18:18,037 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-04-06 22:18:18,038 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 35 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 22:18:18,039 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 161 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 22:18:18,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-04-06 22:18:18,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 124. [2022-04-06 22:18:18,058 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) [2022-04-06 22:18:18,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 158 transitions. [2022-04-06 22:18:18,060 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 158 transitions. Word has length 47 [2022-04-06 22:18:18,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:18:18,061 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 158 transitions. [2022-04-06 22:18:18,061 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-04-06 22:18:18,061 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 158 transitions. [2022-04-06 22:18:18,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 22:18:18,063 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:18:18,063 INFO L499 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] [2022-04-06 22:18:18,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 22:18:18,279 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 [2022-04-06 22:18:18,279 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:18:18,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:18:18,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1475439812, now seen corresponding path program 1 times [2022-04-06 22:18:18,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:18,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [990371231] [2022-04-06 22:18:18,280 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:18:18,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1475439812, now seen corresponding path program 2 times [2022-04-06 22:18:18,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:18:18,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205271105] [2022-04-06 22:18:18,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:18:18,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:18:18,288 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:18:18,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [675676618] [2022-04-06 22:18:18,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:18:18,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:18:18,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:18:18,290 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:18:18,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 22:18:18,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:18:18,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:18:18,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 22:18:18,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:18:18,618 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 23 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-04-06 22:18:18,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:18:18,837 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 28 proven. 5 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-04-06 22:18:18,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:18:18,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205271105] [2022-04-06 22:18:18,838 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:18:18,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675676618] [2022-04-06 22:18:18,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675676618] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:18:18,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:18:18,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-04-06 22:18:18,839 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:18:18,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [990371231] [2022-04-06 22:18:18,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [990371231] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:18:18,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:18:18,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 22:18:18,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135802717] [2022-04-06 22:18:18,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:18:18,840 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 22:18:18,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:18,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 22:18:18,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-04-06 22:18:18,841 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) [2022-04-06 22:18:19,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:18:19,059 INFO L93 Difference]: Finished difference Result 160 states and 210 transitions. [2022-04-06 22:18:19,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 22:18:19,061 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 [2022-04-06 22:18:19,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:18:19,063 INFO L225 Difference]: With dead ends: 160 [2022-04-06 22:18:19,063 INFO L226 Difference]: Without dead ends: 153 [2022-04-06 22:18:19,063 INFO L912 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 [2022-04-06 22:18:19,064 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 24 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 22:18:19,064 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 132 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 22:18:19,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-04-06 22:18:19,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2022-04-06 22:18:19,081 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) [2022-04-06 22:18:19,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 198 transitions. [2022-04-06 22:18:19,082 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 198 transitions. Word has length 52 [2022-04-06 22:18:19,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:18:19,082 INFO L478 AbstractCegarLoop]: Abstraction has 153 states and 198 transitions. [2022-04-06 22:18:19,083 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) [2022-04-06 22:18:19,083 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 198 transitions. [2022-04-06 22:18:19,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 22:18:19,084 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:18:19,084 INFO L499 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] [2022-04-06 22:18:19,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 22:18:19,307 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 [2022-04-06 22:18:19,308 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:18:19,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:18:19,308 INFO L85 PathProgramCache]: Analyzing trace with hash 220857665, now seen corresponding path program 3 times [2022-04-06 22:18:19,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:19,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1024206108] [2022-04-06 22:18:19,308 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:18:19,308 INFO L85 PathProgramCache]: Analyzing trace with hash 220857665, now seen corresponding path program 4 times [2022-04-06 22:18:19,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:18:19,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535871483] [2022-04-06 22:18:19,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:18:19,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:18:19,317 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:18:19,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [220141313] [2022-04-06 22:18:19,317 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:18:19,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:18:19,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:18:19,318 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:18:19,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 22:18:19,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:18:19,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:18:19,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 22:18:19,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:18:19,494 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 47 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 22:18:19,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:18:19,635 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 22:18:19,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:18:19,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535871483] [2022-04-06 22:18:19,636 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:18:19,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220141313] [2022-04-06 22:18:19,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220141313] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:18:19,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:18:19,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-04-06 22:18:19,636 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:18:19,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1024206108] [2022-04-06 22:18:19,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1024206108] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:18:19,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:18:19,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 22:18:19,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142141422] [2022-04-06 22:18:19,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:18:19,637 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 22:18:19,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:19,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 22:18:19,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-04-06 22:18:19,638 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) [2022-04-06 22:18:19,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:18:19,704 INFO L93 Difference]: Finished difference Result 199 states and 251 transitions. [2022-04-06 22:18:19,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 22:18:19,705 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 [2022-04-06 22:18:19,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:18:19,708 INFO L225 Difference]: With dead ends: 199 [2022-04-06 22:18:19,708 INFO L226 Difference]: Without dead ends: 173 [2022-04-06 22:18:19,710 INFO L912 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 [2022-04-06 22:18:19,711 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 15 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 121 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 [2022-04-06 22:18:19,711 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 121 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 22:18:19,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-04-06 22:18:19,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2022-04-06 22:18:19,733 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) [2022-04-06 22:18:19,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 215 transitions. [2022-04-06 22:18:19,734 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 215 transitions. Word has length 61 [2022-04-06 22:18:19,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:18:19,736 INFO L478 AbstractCegarLoop]: Abstraction has 173 states and 215 transitions. [2022-04-06 22:18:19,736 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) [2022-04-06 22:18:19,736 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 215 transitions. [2022-04-06 22:18:19,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 22:18:19,737 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:18:19,737 INFO L499 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] [2022-04-06 22:18:19,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 22:18:19,950 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 [2022-04-06 22:18:19,950 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:18:19,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:18:19,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1997533323, now seen corresponding path program 1 times [2022-04-06 22:18:19,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:19,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2135708079] [2022-04-06 22:18:19,951 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:18:19,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1997533323, now seen corresponding path program 2 times [2022-04-06 22:18:19,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:18:19,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244161098] [2022-04-06 22:18:19,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:18:19,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:18:19,958 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:18:19,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [172681965] [2022-04-06 22:18:19,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:18:19,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:18:19,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:18:19,960 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:18:19,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 22:18:20,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:18:20,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:18:20,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 22:18:20,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:18:20,271 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 22:18:20,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:18:20,419 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-04-06 22:18:20,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:18:20,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244161098] [2022-04-06 22:18:20,420 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:18:20,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172681965] [2022-04-06 22:18:20,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172681965] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 22:18:20,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 22:18:20,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2022-04-06 22:18:20,420 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:18:20,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2135708079] [2022-04-06 22:18:20,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2135708079] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:18:20,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:18:20,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:18:20,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721715712] [2022-04-06 22:18:20,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:18:20,421 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 22:18:20,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:20,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 22:18:20,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-04-06 22:18:20,421 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) [2022-04-06 22:18:20,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:18:20,510 INFO L93 Difference]: Finished difference Result 179 states and 220 transitions. [2022-04-06 22:18:20,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 22:18:20,510 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 [2022-04-06 22:18:20,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:18:20,511 INFO L225 Difference]: With dead ends: 179 [2022-04-06 22:18:20,511 INFO L226 Difference]: Without dead ends: 174 [2022-04-06 22:18:20,512 INFO L912 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 [2022-04-06 22:18:20,512 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 7 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 22:18:20,513 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 102 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 22:18:20,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-04-06 22:18:20,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2022-04-06 22:18:20,530 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) [2022-04-06 22:18:20,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 208 transitions. [2022-04-06 22:18:20,531 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 208 transitions. Word has length 61 [2022-04-06 22:18:20,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:18:20,532 INFO L478 AbstractCegarLoop]: Abstraction has 172 states and 208 transitions. [2022-04-06 22:18:20,532 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) [2022-04-06 22:18:20,532 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 208 transitions. [2022-04-06 22:18:20,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-04-06 22:18:20,532 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:18:20,533 INFO L499 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] [2022-04-06 22:18:20,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 22:18:20,751 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 [2022-04-06 22:18:20,751 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:18:20,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:18:20,752 INFO L85 PathProgramCache]: Analyzing trace with hash 404368620, now seen corresponding path program 5 times [2022-04-06 22:18:20,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:20,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1422971492] [2022-04-06 22:18:20,753 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:18:20,753 INFO L85 PathProgramCache]: Analyzing trace with hash 404368620, now seen corresponding path program 6 times [2022-04-06 22:18:20,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:18:20,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158812134] [2022-04-06 22:18:20,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:18:20,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:18:20,760 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:18:20,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [72137900] [2022-04-06 22:18:20,761 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:18:20,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:18:20,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:18:20,772 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:18:20,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 22:18:20,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 22:18:20,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:18:20,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-06 22:18:20,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:18:21,225 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 25 proven. 22 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-04-06 22:18:21,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:18:21,573 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 29 proven. 18 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-04-06 22:18:21,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:18:21,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158812134] [2022-04-06 22:18:21,574 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:18:21,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72137900] [2022-04-06 22:18:21,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72137900] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:18:21,574 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:18:21,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2022-04-06 22:18:21,575 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:18:21,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1422971492] [2022-04-06 22:18:21,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1422971492] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:18:21,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:18:21,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 22:18:21,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470600472] [2022-04-06 22:18:21,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:18:21,576 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 22:18:21,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:21,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 22:18:21,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-04-06 22:18:21,577 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) [2022-04-06 22:18:21,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:18:21,861 INFO L93 Difference]: Finished difference Result 199 states and 247 transitions. [2022-04-06 22:18:21,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 22:18:21,861 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 [2022-04-06 22:18:21,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:18:21,863 INFO L225 Difference]: With dead ends: 199 [2022-04-06 22:18:21,863 INFO L226 Difference]: Without dead ends: 197 [2022-04-06 22:18:21,864 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-04-06 22:18:21,865 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 16 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 22:18:21,865 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 168 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 22:18:21,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-04-06 22:18:21,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 181. [2022-04-06 22:18:21,891 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) [2022-04-06 22:18:21,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 220 transitions. [2022-04-06 22:18:21,892 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 220 transitions. Word has length 66 [2022-04-06 22:18:21,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:18:21,893 INFO L478 AbstractCegarLoop]: Abstraction has 181 states and 220 transitions. [2022-04-06 22:18:21,893 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) [2022-04-06 22:18:21,893 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 220 transitions. [2022-04-06 22:18:21,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-04-06 22:18:21,894 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:18:21,894 INFO L499 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] [2022-04-06 22:18:21,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 22:18:22,119 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 [2022-04-06 22:18:22,120 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:18:22,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:18:22,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1105968494, now seen corresponding path program 3 times [2022-04-06 22:18:22,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:22,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [513349886] [2022-04-06 22:18:22,121 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:18:22,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1105968494, now seen corresponding path program 4 times [2022-04-06 22:18:22,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:18:22,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359479214] [2022-04-06 22:18:22,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:18:22,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:18:22,129 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:18:22,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1425969416] [2022-04-06 22:18:22,129 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:18:22,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:18:22,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:18:22,131 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:18:22,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 22:18:22,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:18:22,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:18:22,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 22:18:22,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:18:22,625 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 30 proven. 29 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-06 22:18:22,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:18:22,936 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 43 proven. 16 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-06 22:18:22,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:18:22,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359479214] [2022-04-06 22:18:22,937 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:18:22,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425969416] [2022-04-06 22:18:22,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425969416] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:18:22,937 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:18:22,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2022-04-06 22:18:22,937 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:18:22,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [513349886] [2022-04-06 22:18:22,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [513349886] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:18:22,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:18:22,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 22:18:22,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724068792] [2022-04-06 22:18:22,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:18:22,938 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 22:18:22,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:22,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 22:18:22,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-04-06 22:18:22,939 INFO L87 Difference]: Start difference. First operand 181 states and 220 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-04-06 22:18:23,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:18:23,318 INFO L93 Difference]: Finished difference Result 208 states and 259 transitions. [2022-04-06 22:18:23,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 22:18:23,319 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), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 66 [2022-04-06 22:18:23,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:18:23,320 INFO L225 Difference]: With dead ends: 208 [2022-04-06 22:18:23,320 INFO L226 Difference]: Without dead ends: 206 [2022-04-06 22:18:23,321 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-04-06 22:18:23,321 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 19 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 22:18:23,321 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 195 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 22:18:23,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-04-06 22:18:23,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 190. [2022-04-06 22:18:23,345 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) [2022-04-06 22:18:23,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 232 transitions. [2022-04-06 22:18:23,346 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 232 transitions. Word has length 66 [2022-04-06 22:18:23,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:18:23,347 INFO L478 AbstractCegarLoop]: Abstraction has 190 states and 232 transitions. [2022-04-06 22:18:23,347 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), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-04-06 22:18:23,347 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 232 transitions. [2022-04-06 22:18:23,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-04-06 22:18:23,348 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:18:23,348 INFO L499 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] [2022-04-06 22:18:23,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 22:18:23,564 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 [2022-04-06 22:18:23,564 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:18:23,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:18:23,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1181721515, now seen corresponding path program 5 times [2022-04-06 22:18:23,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:23,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [45114096] [2022-04-06 22:18:23,565 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:18:23,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1181721515, now seen corresponding path program 6 times [2022-04-06 22:18:23,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:18:23,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591995536] [2022-04-06 22:18:23,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:18:23,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:18:23,571 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:18:23,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [529811859] [2022-04-06 22:18:23,572 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:18:23,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:18:23,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:18:23,573 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:18:23,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 22:18:23,624 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 22:18:23,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:18:23,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 22:18:23,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:18:23,912 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 27 proven. 27 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-04-06 22:18:23,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:18:24,179 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 31 proven. 18 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-04-06 22:18:24,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:18:24,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591995536] [2022-04-06 22:18:24,179 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:18:24,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529811859] [2022-04-06 22:18:24,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529811859] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:18:24,180 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:18:24,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2022-04-06 22:18:24,180 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:18:24,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [45114096] [2022-04-06 22:18:24,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [45114096] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:18:24,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:18:24,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 22:18:24,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590191358] [2022-04-06 22:18:24,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:18:24,181 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 22:18:24,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:24,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 22:18:24,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-04-06 22:18:24,181 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) [2022-04-06 22:18:24,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:18:24,459 INFO L93 Difference]: Finished difference Result 214 states and 271 transitions. [2022-04-06 22:18:24,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 22:18:24,460 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 [2022-04-06 22:18:24,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:18:24,461 INFO L225 Difference]: With dead ends: 214 [2022-04-06 22:18:24,461 INFO L226 Difference]: Without dead ends: 208 [2022-04-06 22:18:24,462 INFO L912 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 [2022-04-06 22:18:24,462 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 14 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 22:18:24,462 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 215 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 22:18:24,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-04-06 22:18:24,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 192. [2022-04-06 22:18:24,489 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) [2022-04-06 22:18:24,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 236 transitions. [2022-04-06 22:18:24,490 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 236 transitions. Word has length 71 [2022-04-06 22:18:24,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:18:24,491 INFO L478 AbstractCegarLoop]: Abstraction has 192 states and 236 transitions. [2022-04-06 22:18:24,491 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) [2022-04-06 22:18:24,491 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 236 transitions. [2022-04-06 22:18:24,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-04-06 22:18:24,492 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:18:24,492 INFO L499 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] [2022-04-06 22:18:24,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 22:18:24,707 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 [2022-04-06 22:18:24,708 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:18:24,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:18:24,708 INFO L85 PathProgramCache]: Analyzing trace with hash 787354729, now seen corresponding path program 3 times [2022-04-06 22:18:24,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:24,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1732446779] [2022-04-06 22:18:24,709 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:18:24,709 INFO L85 PathProgramCache]: Analyzing trace with hash 787354729, now seen corresponding path program 4 times [2022-04-06 22:18:24,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:18:24,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762281224] [2022-04-06 22:18:24,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:18:24,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:18:24,719 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:18:24,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [546342175] [2022-04-06 22:18:24,719 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:18:24,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:18:24,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:18:24,721 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:18:24,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 22:18:24,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:18:24,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:18:24,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 22:18:24,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:18:25,195 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-04-06 22:18:25,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:18:25,499 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 42 proven. 27 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-04-06 22:18:25,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:18:25,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762281224] [2022-04-06 22:18:25,500 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:18:25,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546342175] [2022-04-06 22:18:25,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546342175] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:18:25,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:18:25,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2022-04-06 22:18:25,500 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:18:25,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1732446779] [2022-04-06 22:18:25,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1732446779] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:18:25,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:18:25,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 22:18:25,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882339249] [2022-04-06 22:18:25,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:18:25,501 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 22:18:25,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:25,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 22:18:25,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-04-06 22:18:25,502 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) [2022-04-06 22:18:25,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:18:25,803 INFO L93 Difference]: Finished difference Result 219 states and 281 transitions. [2022-04-06 22:18:25,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 22:18:25,807 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 [2022-04-06 22:18:25,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:18:25,809 INFO L225 Difference]: With dead ends: 219 [2022-04-06 22:18:25,809 INFO L226 Difference]: Without dead ends: 210 [2022-04-06 22:18:25,809 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-04-06 22:18:25,810 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 15 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 22:18:25,810 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 185 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 22:18:25,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-04-06 22:18:25,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 208. [2022-04-06 22:18:25,844 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) [2022-04-06 22:18:25,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 260 transitions. [2022-04-06 22:18:25,845 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 260 transitions. Word has length 71 [2022-04-06 22:18:25,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:18:25,845 INFO L478 AbstractCegarLoop]: Abstraction has 208 states and 260 transitions. [2022-04-06 22:18:25,845 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) [2022-04-06 22:18:25,846 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 260 transitions. [2022-04-06 22:18:25,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-04-06 22:18:25,846 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:18:25,847 INFO L499 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] [2022-04-06 22:18:25,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 22:18:26,055 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 [2022-04-06 22:18:26,055 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:18:26,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:18:26,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1898774094, now seen corresponding path program 5 times [2022-04-06 22:18:26,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:26,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [743257925] [2022-04-06 22:18:26,056 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:18:26,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1898774094, now seen corresponding path program 6 times [2022-04-06 22:18:26,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:18:26,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663051485] [2022-04-06 22:18:26,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:18:26,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:18:26,064 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:18:26,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [276848594] [2022-04-06 22:18:26,064 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:18:26,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:18:26,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:18:26,065 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:18:26,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 22:18:26,116 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-04-06 22:18:26,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:18:26,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 22:18:26,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:18:26,278 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 18 proven. 135 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 22:18:26,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:18:26,441 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 18 proven. 27 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-04-06 22:18:26,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:18:26,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663051485] [2022-04-06 22:18:26,441 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:18:26,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276848594] [2022-04-06 22:18:26,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276848594] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:18:26,442 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:18:26,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-04-06 22:18:26,442 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:18:26,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [743257925] [2022-04-06 22:18:26,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [743257925] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:18:26,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:18:26,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 22:18:26,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404292649] [2022-04-06 22:18:26,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:18:26,443 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 22:18:26,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:26,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 22:18:26,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-04-06 22:18:26,443 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) [2022-04-06 22:18:26,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:18:26,523 INFO L93 Difference]: Finished difference Result 277 states and 329 transitions. [2022-04-06 22:18:26,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 22:18:26,524 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 [2022-04-06 22:18:26,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:18:26,525 INFO L225 Difference]: With dead ends: 277 [2022-04-06 22:18:26,525 INFO L226 Difference]: Without dead ends: 250 [2022-04-06 22:18:26,525 INFO L912 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 [2022-04-06 22:18:26,526 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 10 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 22:18:26,526 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 148 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 22:18:26,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-04-06 22:18:26,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 229. [2022-04-06 22:18:26,552 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) [2022-04-06 22:18:26,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 268 transitions. [2022-04-06 22:18:26,553 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 268 transitions. Word has length 80 [2022-04-06 22:18:26,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:18:26,553 INFO L478 AbstractCegarLoop]: Abstraction has 229 states and 268 transitions. [2022-04-06 22:18:26,554 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) [2022-04-06 22:18:26,554 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 268 transitions. [2022-04-06 22:18:26,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-04-06 22:18:26,555 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:18:26,555 INFO L499 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] [2022-04-06 22:18:26,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-06 22:18:26,775 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 [2022-04-06 22:18:26,775 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:18:26,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:18:26,776 INFO L85 PathProgramCache]: Analyzing trace with hash 629296923, now seen corresponding path program 7 times [2022-04-06 22:18:26,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:26,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1052094290] [2022-04-06 22:18:26,776 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:18:26,776 INFO L85 PathProgramCache]: Analyzing trace with hash 629296923, now seen corresponding path program 8 times [2022-04-06 22:18:26,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:18:26,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928773591] [2022-04-06 22:18:26,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:18:26,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:18:26,784 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:18:26,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2009754236] [2022-04-06 22:18:26,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:18:26,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:18:26,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:18:26,785 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:18:26,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 22:18:26,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:18:26,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:18:26,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 22:18:26,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:18:27,355 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 23 proven. 33 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-04-06 22:18:27,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:18:27,611 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 20 proven. 33 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-04-06 22:18:27,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:18:27,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928773591] [2022-04-06 22:18:27,612 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:18:27,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009754236] [2022-04-06 22:18:27,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009754236] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:18:27,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:18:27,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2022-04-06 22:18:27,612 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:18:27,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1052094290] [2022-04-06 22:18:27,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1052094290] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:18:27,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:18:27,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 22:18:27,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331996328] [2022-04-06 22:18:27,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:18:27,613 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 22:18:27,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:27,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 22:18:27,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-04-06 22:18:27,614 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) [2022-04-06 22:18:28,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:18:28,042 INFO L93 Difference]: Finished difference Result 256 states and 307 transitions. [2022-04-06 22:18:28,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 22:18:28,042 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 [2022-04-06 22:18:28,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:18:28,044 INFO L225 Difference]: With dead ends: 256 [2022-04-06 22:18:28,044 INFO L226 Difference]: Without dead ends: 254 [2022-04-06 22:18:28,045 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 155 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-04-06 22:18:28,045 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 25 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 22:18:28,045 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 235 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 22:18:28,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-04-06 22:18:28,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 238. [2022-04-06 22:18:28,071 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) [2022-04-06 22:18:28,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 280 transitions. [2022-04-06 22:18:28,072 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 280 transitions. Word has length 85 [2022-04-06 22:18:28,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:18:28,072 INFO L478 AbstractCegarLoop]: Abstraction has 238 states and 280 transitions. [2022-04-06 22:18:28,072 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) [2022-04-06 22:18:28,073 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 280 transitions. [2022-04-06 22:18:28,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-04-06 22:18:28,073 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:18:28,073 INFO L499 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] [2022-04-06 22:18:28,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 22:18:28,292 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 [2022-04-06 22:18:28,293 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:18:28,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:18:28,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1330896797, now seen corresponding path program 7 times [2022-04-06 22:18:28,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:28,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [452183098] [2022-04-06 22:18:28,293 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:18:28,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1330896797, now seen corresponding path program 8 times [2022-04-06 22:18:28,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:18:28,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981185907] [2022-04-06 22:18:28,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:18:28,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:18:28,300 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:18:28,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [742385817] [2022-04-06 22:18:28,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:18:28,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:18:28,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:18:28,302 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:18:28,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-06 22:18:28,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:18:28,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:18:28,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 22:18:28,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:18:28,960 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 20 proven. 33 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-04-06 22:18:28,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:18:29,274 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 20 proven. 33 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-04-06 22:18:29,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:18:29,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981185907] [2022-04-06 22:18:29,274 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:18:29,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742385817] [2022-04-06 22:18:29,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742385817] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:18:29,275 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:18:29,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2022-04-06 22:18:29,275 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:18:29,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [452183098] [2022-04-06 22:18:29,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [452183098] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:18:29,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:18:29,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 22:18:29,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114624751] [2022-04-06 22:18:29,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:18:29,276 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 22:18:29,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:29,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 22:18:29,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-04-06 22:18:29,276 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) [2022-04-06 22:18:29,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:18:29,677 INFO L93 Difference]: Finished difference Result 286 states and 341 transitions. [2022-04-06 22:18:29,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 22:18:29,678 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 [2022-04-06 22:18:29,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:18:29,680 INFO L225 Difference]: With dead ends: 286 [2022-04-06 22:18:29,680 INFO L226 Difference]: Without dead ends: 284 [2022-04-06 22:18:29,680 INFO L912 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 [2022-04-06 22:18:29,680 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 9 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 22:18:29,681 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 248 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 22:18:29,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-04-06 22:18:29,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 268. [2022-04-06 22:18:29,724 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) [2022-04-06 22:18:29,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 314 transitions. [2022-04-06 22:18:29,727 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 314 transitions. Word has length 85 [2022-04-06 22:18:29,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:18:29,727 INFO L478 AbstractCegarLoop]: Abstraction has 268 states and 314 transitions. [2022-04-06 22:18:29,727 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) [2022-04-06 22:18:29,727 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 314 transitions. [2022-04-06 22:18:29,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-04-06 22:18:29,730 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:18:29,731 INFO L499 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] [2022-04-06 22:18:29,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-06 22:18:29,943 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 [2022-04-06 22:18:29,943 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:18:29,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:18:29,944 INFO L85 PathProgramCache]: Analyzing trace with hash 148216665, now seen corresponding path program 9 times [2022-04-06 22:18:29,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:29,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1131215380] [2022-04-06 22:18:29,944 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:18:29,945 INFO L85 PathProgramCache]: Analyzing trace with hash 148216665, now seen corresponding path program 10 times [2022-04-06 22:18:29,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:18:29,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191529778] [2022-04-06 22:18:29,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:18:29,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:18:29,958 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:18:29,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1831952155] [2022-04-06 22:18:29,958 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:18:29,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:18:29,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:18:29,968 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:18:29,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-06 22:18:30,025 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:18:30,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:18:30,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 22:18:30,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:18:31,114 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 60 proven. 41 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 22:18:31,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:18:31,422 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 78 proven. 8 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-04-06 22:18:31,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:18:31,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191529778] [2022-04-06 22:18:31,422 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:18:31,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831952155] [2022-04-06 22:18:31,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831952155] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:18:31,423 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:18:31,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2022-04-06 22:18:31,423 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:18:31,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1131215380] [2022-04-06 22:18:31,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1131215380] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:18:31,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:18:31,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 22:18:31,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951260633] [2022-04-06 22:18:31,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:18:31,424 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 22:18:31,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:31,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 22:18:31,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-04-06 22:18:31,426 INFO L87 Difference]: Start difference. First operand 268 states and 314 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, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2022-04-06 22:18:32,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:18:32,318 INFO L93 Difference]: Finished difference Result 297 states and 355 transitions. [2022-04-06 22:18:32,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 22:18:32,319 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, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) Word has length 85 [2022-04-06 22:18:32,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:18:32,321 INFO L225 Difference]: With dead ends: 297 [2022-04-06 22:18:32,321 INFO L226 Difference]: Without dead ends: 295 [2022-04-06 22:18:32,321 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 153 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-04-06 22:18:32,322 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 13 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 22:18:32,322 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 241 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 480 Invalid, 0 Unknown, 7 Unchecked, 0.8s Time] [2022-04-06 22:18:32,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-04-06 22:18:32,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 249. [2022-04-06 22:18:32,359 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) [2022-04-06 22:18:32,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 294 transitions. [2022-04-06 22:18:32,360 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 294 transitions. Word has length 85 [2022-04-06 22:18:32,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:18:32,360 INFO L478 AbstractCegarLoop]: Abstraction has 249 states and 294 transitions. [2022-04-06 22:18:32,360 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, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2022-04-06 22:18:32,361 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 294 transitions. [2022-04-06 22:18:32,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-04-06 22:18:32,361 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:18:32,362 INFO L499 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] [2022-04-06 22:18:32,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-06 22:18:32,587 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 [2022-04-06 22:18:32,587 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:18:32,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:18:32,588 INFO L85 PathProgramCache]: Analyzing trace with hash 849816539, now seen corresponding path program 11 times [2022-04-06 22:18:32,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:32,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [168227962] [2022-04-06 22:18:32,588 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:18:32,588 INFO L85 PathProgramCache]: Analyzing trace with hash 849816539, now seen corresponding path program 12 times [2022-04-06 22:18:32,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:18:32,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637271224] [2022-04-06 22:18:32,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:18:32,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:18:32,600 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:18:32,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1813291264] [2022-04-06 22:18:32,600 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:18:32,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:18:32,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:18:32,602 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:18:32,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-06 22:18:32,703 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 22:18:32,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:18:32,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 22:18:32,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:18:33,011 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 66 proven. 33 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2022-04-06 22:18:33,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:18:33,342 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:18:33,345 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:18:39,345 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse5 (+ (* (- 1) c_main_~q~0) c_main_~p~0))) (let ((.cse0 (= c_main_~y~0 0)) (.cse4 (+ c_main_~b~0 (* (- 1) c_main_~q~0 c_main_~x~0))) (.cse1 (* .cse5 c_main_~x~0)) (.cse3 (+ (* (- 1) c_main_~b~0) c_main_~a~0))) (and (let ((.cse6 (div .cse4 c_main_~y~0))) (let ((.cse2 (+ c_main_~r~0 (* (- 1) .cse6)))) (or .cse0 (= (+ .cse1 (* .cse2 c_main_~y~0)) .cse3) (not (= (mod .cse4 c_main_~y~0) 0)) (not (= (+ (* c_main_~q~0 .cse2) 1) (* .cse5 .cse6)))))) (or (not .cse0) (not (= .cse4 0)) (let ((.cse8 (= c_main_~p~0 0)) (.cse7 (+ (* c_main_~q~0 c_main_~r~0) 1))) (and (or (not (= .cse7 0)) (forall ((main_~s~0 Int)) (= (+ (* (+ (* (- 1) c_main_~q~0) c_main_~p~0) c_main_~x~0) (* (+ (* (- 1) main_~s~0) c_main_~r~0) c_main_~y~0)) (+ (* (- 1) c_main_~b~0) c_main_~a~0))) (not .cse8)) (or .cse8 (not (= (mod .cse7 c_main_~p~0) 0)) (= (+ .cse1 (* (+ c_main_~r~0 (* (div .cse7 c_main_~p~0) (- 1))) c_main_~y~0)) .cse3)))))))) is different from true [2022-04-06 22:18:39,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:18:39,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637271224] [2022-04-06 22:18:39,347 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:18:39,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813291264] [2022-04-06 22:18:39,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813291264] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 22:18:39,347 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 22:18:39,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-04-06 22:18:39,348 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:18:39,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [168227962] [2022-04-06 22:18:39,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [168227962] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:18:39,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:18:39,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 22:18:39,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535785469] [2022-04-06 22:18:39,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:18:39,348 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 22:18:39,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:39,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 22:18:39,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=143, Unknown=1, NotChecked=24, Total=210 [2022-04-06 22:18:39,349 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) [2022-04-06 22:18:40,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:18:40,126 INFO L93 Difference]: Finished difference Result 315 states and 392 transitions. [2022-04-06 22:18:40,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 22:18:40,126 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 [2022-04-06 22:18:40,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:18:40,128 INFO L225 Difference]: With dead ends: 315 [2022-04-06 22:18:40,128 INFO L226 Difference]: Without dead ends: 309 [2022-04-06 22:18:40,129 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=61, Invalid=214, Unknown=1, NotChecked=30, Total=306 [2022-04-06 22:18:40,129 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 26 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 22:18:40,130 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 198 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 22:18:40,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-04-06 22:18:40,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 265. [2022-04-06 22:18:40,172 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) [2022-04-06 22:18:40,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 313 transitions. [2022-04-06 22:18:40,173 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 313 transitions. Word has length 85 [2022-04-06 22:18:40,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:18:40,174 INFO L478 AbstractCegarLoop]: Abstraction has 265 states and 313 transitions. [2022-04-06 22:18:40,174 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) [2022-04-06 22:18:40,174 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 313 transitions. [2022-04-06 22:18:40,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-04-06 22:18:40,175 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:18:40,175 INFO L499 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] [2022-04-06 22:18:40,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-04-06 22:18:40,396 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 [2022-04-06 22:18:40,397 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:18:40,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:18:40,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1358919972, now seen corresponding path program 13 times [2022-04-06 22:18:40,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:40,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [382204306] [2022-04-06 22:18:40,398 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:18:40,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1358919972, now seen corresponding path program 14 times [2022-04-06 22:18:40,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:18:40,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939275309] [2022-04-06 22:18:40,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:18:40,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:18:40,407 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:18:40,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1997535536] [2022-04-06 22:18:40,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:18:40,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:18:40,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:18:40,408 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:18:40,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-06 22:18:40,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:18:40,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:18:40,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 22:18:40,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:18:41,097 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-04-06 22:18:41,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:18:42,058 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-04-06 22:18:42,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:18:42,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939275309] [2022-04-06 22:18:42,058 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:18:42,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997535536] [2022-04-06 22:18:42,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997535536] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:18:42,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:18:42,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-04-06 22:18:42,059 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:18:42,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [382204306] [2022-04-06 22:18:42,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [382204306] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:18:42,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:18:42,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 22:18:42,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453992220] [2022-04-06 22:18:42,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:18:42,059 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 22:18:42,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:42,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 22:18:42,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-04-06 22:18:42,060 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) [2022-04-06 22:18:42,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:18:42,494 INFO L93 Difference]: Finished difference Result 291 states and 354 transitions. [2022-04-06 22:18:42,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 22:18:42,495 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 [2022-04-06 22:18:42,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:18:42,496 INFO L225 Difference]: With dead ends: 291 [2022-04-06 22:18:42,496 INFO L226 Difference]: Without dead ends: 285 [2022-04-06 22:18:42,497 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-04-06 22:18:42,497 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 10 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 22:18:42,498 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 270 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 22:18:42,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-04-06 22:18:42,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 269. [2022-04-06 22:18:42,566 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) [2022-04-06 22:18:42,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 319 transitions. [2022-04-06 22:18:42,567 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 319 transitions. Word has length 90 [2022-04-06 22:18:42,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:18:42,568 INFO L478 AbstractCegarLoop]: Abstraction has 269 states and 319 transitions. [2022-04-06 22:18:42,568 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) [2022-04-06 22:18:42,568 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 319 transitions. [2022-04-06 22:18:42,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-04-06 22:18:42,569 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:18:42,569 INFO L499 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] [2022-04-06 22:18:42,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-04-06 22:18:42,769 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 [2022-04-06 22:18:42,769 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:18:42,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:18:42,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1753286758, now seen corresponding path program 15 times [2022-04-06 22:18:42,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:42,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1741675299] [2022-04-06 22:18:42,770 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:18:42,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1753286758, now seen corresponding path program 16 times [2022-04-06 22:18:42,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:18:42,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935568721] [2022-04-06 22:18:42,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:18:42,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:18:42,777 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:18:42,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [425821670] [2022-04-06 22:18:42,777 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:18:42,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:18:42,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:18:42,783 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:18:42,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-06 22:18:42,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:18:42,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:18:42,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 22:18:42,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:18:43,754 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:18:45,797 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 62 proven. 50 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-04-06 22:18:45,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:18:46,210 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 82 proven. 15 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2022-04-06 22:18:46,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:18:46,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935568721] [2022-04-06 22:18:46,210 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:18:46,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425821670] [2022-04-06 22:18:46,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425821670] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:18:46,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:18:46,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-04-06 22:18:46,211 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:18:46,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1741675299] [2022-04-06 22:18:46,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1741675299] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:18:46,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:18:46,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 22:18:46,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720812897] [2022-04-06 22:18:46,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:18:46,212 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 22:18:46,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:46,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 22:18:46,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-04-06 22:18:46,212 INFO L87 Difference]: Start difference. First operand 269 states and 319 transitions. Second operand has 12 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), 7 states have call predecessors, (14), 6 states have call successors, (14) [2022-04-06 22:18:48,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:18:48,155 INFO L93 Difference]: Finished difference Result 302 states and 371 transitions. [2022-04-06 22:18:48,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 22:18:48,156 INFO L78 Accepts]: Start accepts. Automaton has has 12 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), 7 states have call predecessors, (14), 6 states have call successors, (14) Word has length 90 [2022-04-06 22:18:48,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:18:48,158 INFO L225 Difference]: With dead ends: 302 [2022-04-06 22:18:48,158 INFO L226 Difference]: Without dead ends: 296 [2022-04-06 22:18:48,158 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 164 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-04-06 22:18:48,159 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 16 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-04-06 22:18:48,159 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 211 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-04-06 22:18:48,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-04-06 22:18:48,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 276. [2022-04-06 22:18:48,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 173 states have (on average 1.1445086705202312) internal successors, (198), 182 states have internal predecessors, (198), 68 states have call successors, (68), 35 states have call predecessors, (68), 34 states have return successors, (64), 58 states have call predecessors, (64), 64 states have call successors, (64) [2022-04-06 22:18:48,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 330 transitions. [2022-04-06 22:18:48,217 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 330 transitions. Word has length 90 [2022-04-06 22:18:48,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:18:48,217 INFO L478 AbstractCegarLoop]: Abstraction has 276 states and 330 transitions. [2022-04-06 22:18:48,217 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 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), 7 states have call predecessors, (14), 6 states have call successors, (14) [2022-04-06 22:18:48,217 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 330 transitions. [2022-04-06 22:18:48,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-04-06 22:18:48,218 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:18:48,218 INFO L499 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] [2022-04-06 22:18:48,243 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-04-06 22:18:48,442 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 [2022-04-06 22:18:48,443 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:18:48,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:18:48,443 INFO L85 PathProgramCache]: Analyzing trace with hash 27865438, now seen corresponding path program 17 times [2022-04-06 22:18:48,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:48,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1983235525] [2022-04-06 22:18:48,444 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:18:48,444 INFO L85 PathProgramCache]: Analyzing trace with hash 27865438, now seen corresponding path program 18 times [2022-04-06 22:18:48,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:18:48,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4418758] [2022-04-06 22:18:48,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:18:48,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:18:48,451 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:18:48,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1531783251] [2022-04-06 22:18:48,452 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:18:48,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:18:48,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:18:48,453 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:18:48,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-04-06 22:18:48,558 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 22:18:48,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:18:48,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 22:18:48,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:18:54,944 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 71 proven. 34 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2022-04-06 22:18:54,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:18:55,245 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 90 proven. 5 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-04-06 22:18:55,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:18:55,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4418758] [2022-04-06 22:18:55,245 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:18:55,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531783251] [2022-04-06 22:18:55,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531783251] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:18:55,246 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:18:55,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 14 [2022-04-06 22:18:55,246 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:18:55,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1983235525] [2022-04-06 22:18:55,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1983235525] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:18:55,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:18:55,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 22:18:55,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219358224] [2022-04-06 22:18:55,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:18:55,247 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 22:18:55,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:18:55,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 22:18:55,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=143, Unknown=1, NotChecked=0, Total=182 [2022-04-06 22:18:55,248 INFO L87 Difference]: Start difference. First operand 276 states and 330 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) [2022-04-06 22:18:57,735 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 [] [2022-04-06 22:18:59,742 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 22:19:01,747 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 22:19:03,876 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 22:19:16,116 WARN L232 SmtUtils]: Spent 12.14s on a formula simplification. DAG size of input: 56 DAG size of output: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 22:19:18,157 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 22:19:19,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:19:19,098 INFO L93 Difference]: Finished difference Result 344 states and 431 transitions. [2022-04-06 22:19:19,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 22:19:19,098 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 [2022-04-06 22:19:19,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:19:19,100 INFO L225 Difference]: With dead ends: 344 [2022-04-06 22:19:19,100 INFO L226 Difference]: Without dead ends: 326 [2022-04-06 22:19:19,101 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 165 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=57, Invalid=214, Unknown=1, NotChecked=0, Total=272 [2022-04-06 22:19:19,101 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 26 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 29 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.6s IncrementalHoareTripleChecker+Time [2022-04-06 22:19:19,102 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 238 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 497 Invalid, 4 Unknown, 0 Unchecked, 11.6s Time] [2022-04-06 22:19:19,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-04-06 22:19:19,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 317. [2022-04-06 22:19:19,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 201 states have (on average 1.164179104477612) internal successors, (234), 208 states have internal predecessors, (234), 78 states have call successors, (78), 38 states have call predecessors, (78), 37 states have return successors, (74), 70 states have call predecessors, (74), 74 states have call successors, (74) [2022-04-06 22:19:19,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 386 transitions. [2022-04-06 22:19:19,181 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 386 transitions. Word has length 90 [2022-04-06 22:19:19,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:19:19,182 INFO L478 AbstractCegarLoop]: Abstraction has 317 states and 386 transitions. [2022-04-06 22:19:19,182 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) [2022-04-06 22:19:19,182 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 386 transitions. [2022-04-06 22:19:19,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-04-06 22:19:19,183 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:19:19,183 INFO L499 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] [2022-04-06 22:19:19,207 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-04-06 22:19:19,402 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 [2022-04-06 22:19:19,402 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:19:19,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:19:19,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1449122399, now seen corresponding path program 7 times [2022-04-06 22:19:19,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:19:19,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [845868494] [2022-04-06 22:19:19,403 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:19:19,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1449122399, now seen corresponding path program 8 times [2022-04-06 22:19:19,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:19:19,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480038468] [2022-04-06 22:19:19,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:19:19,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:19:19,410 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:19:19,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [604220747] [2022-04-06 22:19:19,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:19:19,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:19:19,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:19:19,412 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:19:19,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-04-06 22:19:19,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:19:19,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:19:19,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 22:19:19,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:19:19,660 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 24 proven. 266 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-04-06 22:19:19,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:19:19,873 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 24 proven. 50 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-04-06 22:19:19,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:19:19,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480038468] [2022-04-06 22:19:19,873 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:19:19,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604220747] [2022-04-06 22:19:19,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604220747] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:19:19,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:19:19,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-04-06 22:19:19,874 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:19:19,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [845868494] [2022-04-06 22:19:19,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [845868494] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:19:19,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:19:19,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 22:19:19,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215688360] [2022-04-06 22:19:19,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:19:19,875 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 22:19:19,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:19:19,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 22:19:19,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-04-06 22:19:19,875 INFO L87 Difference]: Start difference. First operand 317 states and 386 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) [2022-04-06 22:19:20,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:19:20,044 INFO L93 Difference]: Finished difference Result 410 states and 487 transitions. [2022-04-06 22:19:20,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 22:19:20,045 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 [2022-04-06 22:19:20,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:19:20,047 INFO L225 Difference]: With dead ends: 410 [2022-04-06 22:19:20,047 INFO L226 Difference]: Without dead ends: 387 [2022-04-06 22:19:20,047 INFO L912 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 [2022-04-06 22:19:20,048 INFO L913 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 [2022-04-06 22:19:20,048 INFO L914 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] [2022-04-06 22:19:20,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-04-06 22:19:20,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 372. [2022-04-06 22:19:20,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 243 states have (on average 1.131687242798354) internal successors, (275), 251 states have internal predecessors, (275), 81 states have call successors, (81), 48 states have call predecessors, (81), 47 states have return successors, (77), 72 states have call predecessors, (77), 77 states have call successors, (77) [2022-04-06 22:19:20,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 433 transitions. [2022-04-06 22:19:20,149 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 433 transitions. Word has length 99 [2022-04-06 22:19:20,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:19:20,150 INFO L478 AbstractCegarLoop]: Abstraction has 372 states and 433 transitions. [2022-04-06 22:19:20,150 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 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) [2022-04-06 22:19:20,150 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 433 transitions. [2022-04-06 22:19:20,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-04-06 22:19:20,151 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:19:20,151 INFO L499 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] [2022-04-06 22:19:20,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-04-06 22:19:20,375 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 [2022-04-06 22:19:20,376 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:19:20,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:19:20,376 INFO L85 PathProgramCache]: Analyzing trace with hash 340347020, now seen corresponding path program 9 times [2022-04-06 22:19:20,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:19:20,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [616275440] [2022-04-06 22:19:20,376 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:19:20,376 INFO L85 PathProgramCache]: Analyzing trace with hash 340347020, now seen corresponding path program 10 times [2022-04-06 22:19:20,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:19:20,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830772606] [2022-04-06 22:19:20,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:19:20,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:19:20,383 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:19:20,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1477034803] [2022-04-06 22:19:20,384 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:19:20,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:19:20,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:19:20,385 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:19:20,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-04-06 22:19:20,433 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:19:20,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:19:20,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 52 conjunts are in the unsatisfiable core [2022-04-06 22:19:20,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:19:22,126 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 77 proven. 97 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2022-04-06 22:19:22,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:19:22,536 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 108 proven. 27 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2022-04-06 22:19:22,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:19:22,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830772606] [2022-04-06 22:19:22,537 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:19:22,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477034803] [2022-04-06 22:19:22,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477034803] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:19:22,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:19:22,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2022-04-06 22:19:22,538 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:19:22,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [616275440] [2022-04-06 22:19:22,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [616275440] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:19:22,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:19:22,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 22:19:22,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009279674] [2022-04-06 22:19:22,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:19:22,539 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 22:19:22,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:19:22,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 22:19:22,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-04-06 22:19:22,540 INFO L87 Difference]: Start difference. First operand 372 states and 433 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) [2022-04-06 22:19:23,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:19:23,375 INFO L93 Difference]: Finished difference Result 399 states and 472 transitions. [2022-04-06 22:19:23,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 22:19:23,376 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 [2022-04-06 22:19:23,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:19:23,381 INFO L225 Difference]: With dead ends: 399 [2022-04-06 22:19:23,381 INFO L226 Difference]: Without dead ends: 397 [2022-04-06 22:19:23,381 INFO L912 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 [2022-04-06 22:19:23,382 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 15 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 22:19:23,382 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 262 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 22:19:23,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2022-04-06 22:19:23,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 381. [2022-04-06 22:19:23,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 248 states have (on average 1.1330645161290323) internal successors, (281), 256 states have internal predecessors, (281), 84 states have call successors, (84), 49 states have call predecessors, (84), 48 states have return successors, (80), 75 states have call predecessors, (80), 80 states have call successors, (80) [2022-04-06 22:19:23,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 445 transitions. [2022-04-06 22:19:23,483 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 445 transitions. Word has length 104 [2022-04-06 22:19:23,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:19:23,483 INFO L478 AbstractCegarLoop]: Abstraction has 381 states and 445 transitions. [2022-04-06 22:19:23,484 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) [2022-04-06 22:19:23,484 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 445 transitions. [2022-04-06 22:19:23,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-04-06 22:19:23,485 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:19:23,486 INFO L499 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] [2022-04-06 22:19:23,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-04-06 22:19:23,700 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 [2022-04-06 22:19:23,700 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:19:23,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:19:23,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1041946894, now seen corresponding path program 19 times [2022-04-06 22:19:23,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:19:23,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1012167945] [2022-04-06 22:19:23,701 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:19:23,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1041946894, now seen corresponding path program 20 times [2022-04-06 22:19:23,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:19:23,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646947235] [2022-04-06 22:19:23,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:19:23,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:19:23,707 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:19:23,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1300352976] [2022-04-06 22:19:23,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:19:23,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:19:23,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:19:23,708 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:19:23,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-04-06 22:19:23,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:19:23,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:19:23,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 22:19:23,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:19:24,619 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 26 proven. 58 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-04-06 22:19:24,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:19:26,032 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 26 proven. 58 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-04-06 22:19:26,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:19:26,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646947235] [2022-04-06 22:19:26,033 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:19:26,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300352976] [2022-04-06 22:19:26,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300352976] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:19:26,033 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:19:26,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-04-06 22:19:26,033 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:19:26,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1012167945] [2022-04-06 22:19:26,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1012167945] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:19:26,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:19:26,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 22:19:26,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139024029] [2022-04-06 22:19:26,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:19:26,034 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 22:19:26,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:19:26,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 22:19:26,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-04-06 22:19:26,035 INFO L87 Difference]: Start difference. First operand 381 states and 445 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) [2022-04-06 22:19:26,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:19:26,683 INFO L93 Difference]: Finished difference Result 429 states and 506 transitions. [2022-04-06 22:19:26,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 22:19:26,684 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 [2022-04-06 22:19:26,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:19:26,686 INFO L225 Difference]: With dead ends: 429 [2022-04-06 22:19:26,686 INFO L226 Difference]: Without dead ends: 427 [2022-04-06 22:19:26,686 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 192 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-04-06 22:19:26,687 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 10 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 22:19:26,687 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 292 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 22:19:26,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2022-04-06 22:19:26,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 411. [2022-04-06 22:19:26,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 268 states have (on average 1.1305970149253732) internal successors, (303), 276 states have internal predecessors, (303), 90 states have call successors, (90), 53 states have call predecessors, (90), 52 states have return successors, (86), 81 states have call predecessors, (86), 86 states have call successors, (86) [2022-04-06 22:19:26,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 479 transitions. [2022-04-06 22:19:26,775 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 479 transitions. Word has length 104 [2022-04-06 22:19:26,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:19:26,775 INFO L478 AbstractCegarLoop]: Abstraction has 411 states and 479 transitions. [2022-04-06 22:19:26,776 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) [2022-04-06 22:19:26,776 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 479 transitions. [2022-04-06 22:19:26,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-04-06 22:19:26,777 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:19:26,777 INFO L499 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] [2022-04-06 22:19:26,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-04-06 22:19:26,991 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 [2022-04-06 22:19:26,992 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:19:26,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:19:26,992 INFO L85 PathProgramCache]: Analyzing trace with hash -140733238, now seen corresponding path program 21 times [2022-04-06 22:19:26,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:19:26,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2028646724] [2022-04-06 22:19:26,993 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:19:26,993 INFO L85 PathProgramCache]: Analyzing trace with hash -140733238, now seen corresponding path program 22 times [2022-04-06 22:19:26,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:19:26,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202665613] [2022-04-06 22:19:26,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:19:26,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:19:27,000 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:19:27,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1651890867] [2022-04-06 22:19:27,000 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:19:27,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:19:27,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:19:27,001 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:19:27,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-04-06 22:19:27,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:19:27,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:19:27,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 66 conjunts are in the unsatisfiable core [2022-04-06 22:19:27,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:19:28,117 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 85 proven. 110 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2022-04-06 22:19:28,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:19:28,471 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 109 proven. 8 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2022-04-06 22:19:28,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:19:28,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202665613] [2022-04-06 22:19:28,472 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:19:28,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651890867] [2022-04-06 22:19:28,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651890867] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:19:28,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:19:28,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 18 [2022-04-06 22:19:28,472 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:19:28,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2028646724] [2022-04-06 22:19:28,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2028646724] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:19:28,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:19:28,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 22:19:28,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913486237] [2022-04-06 22:19:28,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:19:28,473 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 22:19:28,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:19:28,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 22:19:28,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-04-06 22:19:28,473 INFO L87 Difference]: Start difference. First operand 411 states and 479 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 12 states have internal predecessors, (37), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-04-06 22:19:29,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:19:29,216 INFO L93 Difference]: Finished difference Result 462 states and 538 transitions. [2022-04-06 22:19:29,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 22:19:29,217 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 12 states have internal predecessors, (37), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 104 [2022-04-06 22:19:29,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:19:29,219 INFO L225 Difference]: With dead ends: 462 [2022-04-06 22:19:29,219 INFO L226 Difference]: Without dead ends: 460 [2022-04-06 22:19:29,220 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 187 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-04-06 22:19:29,220 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 32 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 22:19:29,220 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 242 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 22:19:29,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2022-04-06 22:19:29,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 406. [2022-04-06 22:19:29,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 267 states have (on average 1.1310861423220975) internal successors, (302), 273 states have internal predecessors, (302), 85 states have call successors, (85), 54 states have call predecessors, (85), 53 states have return successors, (81), 78 states have call predecessors, (81), 81 states have call successors, (81) [2022-04-06 22:19:29,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 468 transitions. [2022-04-06 22:19:29,334 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 468 transitions. Word has length 104 [2022-04-06 22:19:29,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:19:29,335 INFO L478 AbstractCegarLoop]: Abstraction has 406 states and 468 transitions. [2022-04-06 22:19:29,335 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 12 states have internal predecessors, (37), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-04-06 22:19:29,335 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 468 transitions. [2022-04-06 22:19:29,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-04-06 22:19:29,336 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:19:29,336 INFO L499 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] [2022-04-06 22:19:29,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-04-06 22:19:29,539 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 [2022-04-06 22:19:29,540 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:19:29,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:19:29,540 INFO L85 PathProgramCache]: Analyzing trace with hash 560866636, now seen corresponding path program 23 times [2022-04-06 22:19:29,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:19:29,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [335756970] [2022-04-06 22:19:29,540 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:19:29,541 INFO L85 PathProgramCache]: Analyzing trace with hash 560866636, now seen corresponding path program 24 times [2022-04-06 22:19:29,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:19:29,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427668813] [2022-04-06 22:19:29,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:19:29,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:19:29,547 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:19:29,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1757507667] [2022-04-06 22:19:29,547 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:19:29,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:19:29,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:19:29,548 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:19:29,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-04-06 22:19:29,999 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-04-06 22:19:29,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:19:30,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 22:19:30,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:19:32,187 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 107 proven. 40 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-04-06 22:19:32,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:19:35,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:19:35,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427668813] [2022-04-06 22:19:35,079 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:19:35,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757507667] [2022-04-06 22:19:35,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757507667] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 22:19:35,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 22:19:35,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-04-06 22:19:35,079 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:19:35,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [335756970] [2022-04-06 22:19:35,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [335756970] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:19:35,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:19:35,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 22:19:35,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592224409] [2022-04-06 22:19:35,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:19:35,080 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 22:19:35,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:19:35,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 22:19:35,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=404, Unknown=1, NotChecked=0, Total=506 [2022-04-06 22:19:35,080 INFO L87 Difference]: Start difference. First operand 406 states and 468 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) [2022-04-06 22:19:40,695 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 [] [2022-04-06 22:19:41,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:19:41,094 INFO L93 Difference]: Finished difference Result 502 states and 608 transitions. [2022-04-06 22:19:41,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 22:19:41,094 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 [2022-04-06 22:19:41,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:19:41,097 INFO L225 Difference]: With dead ends: 502 [2022-04-06 22:19:41,097 INFO L226 Difference]: Without dead ends: 496 [2022-04-06 22:19:41,098 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=141, Invalid=614, Unknown=1, NotChecked=0, Total=756 [2022-04-06 22:19:41,098 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 46 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 59 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-04-06 22:19:41,099 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 268 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 741 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2022-04-06 22:19:41,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2022-04-06 22:19:41,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 464. [2022-04-06 22:19:41,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 303 states have (on average 1.141914191419142) internal successors, (346), 311 states have internal predecessors, (346), 102 states have call successors, (102), 59 states have call predecessors, (102), 58 states have return successors, (98), 93 states have call predecessors, (98), 98 states have call successors, (98) [2022-04-06 22:19:41,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 546 transitions. [2022-04-06 22:19:41,208 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 546 transitions. Word has length 104 [2022-04-06 22:19:41,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:19:41,208 INFO L478 AbstractCegarLoop]: Abstraction has 464 states and 546 transitions. [2022-04-06 22:19:41,208 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) [2022-04-06 22:19:41,209 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 546 transitions. [2022-04-06 22:19:41,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-04-06 22:19:41,210 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:19:41,210 INFO L499 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] [2022-04-06 22:19:41,217 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-04-06 22:19:41,417 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 [2022-04-06 22:19:41,417 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:19:41,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:19:41,417 INFO L85 PathProgramCache]: Analyzing trace with hash -152279154, now seen corresponding path program 25 times [2022-04-06 22:19:41,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:19:41,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1562377860] [2022-04-06 22:19:41,418 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:19:41,418 INFO L85 PathProgramCache]: Analyzing trace with hash -152279154, now seen corresponding path program 26 times [2022-04-06 22:19:41,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:19:41,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760671570] [2022-04-06 22:19:41,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:19:41,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:19:41,426 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:19:41,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1399383469] [2022-04-06 22:19:41,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:19:41,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:19:41,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:19:41,428 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:19:41,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-04-06 22:19:41,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:19:41,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:19:41,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 22:19:41,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:19:43,299 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 75 proven. 75 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2022-04-06 22:19:43,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:19:43,750 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 115 proven. 20 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2022-04-06 22:19:43,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:19:43,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760671570] [2022-04-06 22:19:43,751 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:19:43,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399383469] [2022-04-06 22:19:43,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399383469] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:19:43,751 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:19:43,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2022-04-06 22:19:43,751 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:19:43,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1562377860] [2022-04-06 22:19:43,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1562377860] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:19:43,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:19:43,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 22:19:43,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89103686] [2022-04-06 22:19:43,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:19:43,752 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 22:19:43,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:19:43,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 22:19:43,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-04-06 22:19:43,753 INFO L87 Difference]: Start difference. First operand 464 states and 546 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) [2022-04-06 22:19:45,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:19:45,516 INFO L93 Difference]: Finished difference Result 493 states and 587 transitions. [2022-04-06 22:19:45,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 22:19:45,517 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 [2022-04-06 22:19:45,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:19:45,532 INFO L225 Difference]: With dead ends: 493 [2022-04-06 22:19:45,532 INFO L226 Difference]: Without dead ends: 491 [2022-04-06 22:19:45,533 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 188 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2022-04-06 22:19:45,534 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 15 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 22:19:45,534 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 264 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 559 Invalid, 0 Unknown, 10 Unchecked, 1.5s Time] [2022-04-06 22:19:45,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2022-04-06 22:19:45,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 464. [2022-04-06 22:19:45,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 303 states have (on average 1.141914191419142) internal successors, (346), 311 states have internal predecessors, (346), 102 states have call successors, (102), 59 states have call predecessors, (102), 58 states have return successors, (98), 93 states have call predecessors, (98), 98 states have call successors, (98) [2022-04-06 22:19:45,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 546 transitions. [2022-04-06 22:19:45,686 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 546 transitions. Word has length 104 [2022-04-06 22:19:45,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:19:45,686 INFO L478 AbstractCegarLoop]: Abstraction has 464 states and 546 transitions. [2022-04-06 22:19:45,687 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) [2022-04-06 22:19:45,687 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 546 transitions. [2022-04-06 22:19:45,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-04-06 22:19:45,688 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:19:45,688 INFO L499 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] [2022-04-06 22:19:45,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-04-06 22:19:45,907 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 [2022-04-06 22:19:45,907 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:19:45,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:19:45,908 INFO L85 PathProgramCache]: Analyzing trace with hash 549320720, now seen corresponding path program 27 times [2022-04-06 22:19:45,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:19:45,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1930410416] [2022-04-06 22:19:45,908 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:19:45,908 INFO L85 PathProgramCache]: Analyzing trace with hash 549320720, now seen corresponding path program 28 times [2022-04-06 22:19:45,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:19:45,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702239201] [2022-04-06 22:19:45,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:19:45,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:19:45,914 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:19:45,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1479293085] [2022-04-06 22:19:45,915 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:19:45,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:19:45,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:19:45,917 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:19:45,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-04-06 22:19:45,981 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:19:45,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:19:45,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 68 conjunts are in the unsatisfiable core [2022-04-06 22:19:45,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:19:46,931 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 58 proven. 137 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2022-04-06 22:19:46,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:19:47,556 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 100 proven. 45 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2022-04-06 22:19:47,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:19:47,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702239201] [2022-04-06 22:19:47,557 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:19:47,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479293085] [2022-04-06 22:19:47,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479293085] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:19:47,557 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:19:47,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 22 [2022-04-06 22:19:47,557 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:19:47,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1930410416] [2022-04-06 22:19:47,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1930410416] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:19:47,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:19:47,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 22:19:47,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299650093] [2022-04-06 22:19:47,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:19:47,558 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 22:19:47,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:19:47,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 22:19:47,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-04-06 22:19:47,559 INFO L87 Difference]: Start difference. First operand 464 states and 546 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 13 states have internal predecessors, (37), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-04-06 22:19:48,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:19:48,617 INFO L93 Difference]: Finished difference Result 495 states and 588 transitions. [2022-04-06 22:19:48,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 22:19:48,618 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 13 states have internal predecessors, (37), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 104 [2022-04-06 22:19:48,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:19:48,620 INFO L225 Difference]: With dead ends: 495 [2022-04-06 22:19:48,620 INFO L226 Difference]: Without dead ends: 493 [2022-04-06 22:19:48,620 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 184 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2022-04-06 22:19:48,621 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 30 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 22:19:48,621 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 270 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 22:19:48,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2022-04-06 22:19:48,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 466. [2022-04-06 22:19:48,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 304 states have (on average 1.1414473684210527) internal successors, (347), 312 states have internal predecessors, (347), 102 states have call successors, (102), 60 states have call predecessors, (102), 59 states have return successors, (98), 93 states have call predecessors, (98), 98 states have call successors, (98) [2022-04-06 22:19:48,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 547 transitions. [2022-04-06 22:19:48,761 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 547 transitions. Word has length 104 [2022-04-06 22:19:48,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:19:48,761 INFO L478 AbstractCegarLoop]: Abstraction has 466 states and 547 transitions. [2022-04-06 22:19:48,761 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 13 states have internal predecessors, (37), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-04-06 22:19:48,761 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 547 transitions. [2022-04-06 22:19:48,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-04-06 22:19:48,762 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:19:48,763 INFO L499 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] [2022-04-06 22:19:48,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-04-06 22:19:48,987 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 [2022-04-06 22:19:48,988 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:19:48,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:19:48,988 INFO L85 PathProgramCache]: Analyzing trace with hash -633359412, now seen corresponding path program 29 times [2022-04-06 22:19:48,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:19:48,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1278617269] [2022-04-06 22:19:48,989 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:19:48,989 INFO L85 PathProgramCache]: Analyzing trace with hash -633359412, now seen corresponding path program 30 times [2022-04-06 22:19:48,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:19:48,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223920633] [2022-04-06 22:19:48,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:19:48,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:19:48,995 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:19:48,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [720962026] [2022-04-06 22:19:48,995 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:19:48,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:19:48,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:19:48,996 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:19:48,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-04-06 22:19:49,498 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 22:19:49,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:19:49,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 40 conjunts are in the unsatisfiable core [2022-04-06 22:19:49,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:19:50,358 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 58 proven. 41 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2022-04-06 22:19:50,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:19:56,673 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 62 proven. 25 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2022-04-06 22:19:56,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:19:56,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223920633] [2022-04-06 22:19:56,674 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:19:56,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720962026] [2022-04-06 22:19:56,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720962026] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:19:56,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:19:56,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 18 [2022-04-06 22:19:56,674 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:19:56,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1278617269] [2022-04-06 22:19:56,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1278617269] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:19:56,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:19:56,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 22:19:56,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708267596] [2022-04-06 22:19:56,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:19:56,674 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 22:19:56,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:19:56,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 22:19:56,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=248, Unknown=2, NotChecked=0, Total=306 [2022-04-06 22:19:56,675 INFO L87 Difference]: Start difference. First operand 466 states and 547 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) [2022-04-06 22:19:59,007 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 [] [2022-04-06 22:20:00,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:20:00,087 INFO L93 Difference]: Finished difference Result 545 states and 658 transitions. [2022-04-06 22:20:00,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 22:20:00,088 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 [2022-04-06 22:20:00,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:20:00,090 INFO L225 Difference]: With dead ends: 545 [2022-04-06 22:20:00,090 INFO L226 Difference]: Without dead ends: 543 [2022-04-06 22:20:00,090 INFO L912 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 [2022-04-06 22:20:00,090 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 54 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 43 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-04-06 22:20:00,091 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 191 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 426 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2022-04-06 22:20:00,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2022-04-06 22:20:00,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 455. [2022-04-06 22:20:00,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 295 states have (on average 1.1355932203389831) internal successors, (335), 307 states have internal predecessors, (335), 101 states have call successors, (101), 59 states have call predecessors, (101), 58 states have return successors, (97), 88 states have call predecessors, (97), 97 states have call successors, (97) [2022-04-06 22:20:00,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 533 transitions. [2022-04-06 22:20:00,228 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 533 transitions. Word has length 104 [2022-04-06 22:20:00,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:20:00,228 INFO L478 AbstractCegarLoop]: Abstraction has 455 states and 533 transitions. [2022-04-06 22:20:00,228 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) [2022-04-06 22:20:00,228 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 533 transitions. [2022-04-06 22:20:00,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-04-06 22:20:00,229 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:20:00,230 INFO L499 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] [2022-04-06 22:20:00,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-04-06 22:20:00,436 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 [2022-04-06 22:20:00,437 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:20:00,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:20:00,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1283404789, now seen corresponding path program 31 times [2022-04-06 22:20:00,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:20:00,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [617282370] [2022-04-06 22:20:00,438 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:20:00,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1283404789, now seen corresponding path program 32 times [2022-04-06 22:20:00,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:20:00,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249068968] [2022-04-06 22:20:00,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:20:00,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:20:00,443 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:20:00,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [837089416] [2022-04-06 22:20:00,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:20:00,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:20:00,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:20:00,445 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:20:00,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-04-06 22:20:00,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:20:00,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:20:00,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 22:20:00,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:20:01,027 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 28 proven. 62 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2022-04-06 22:20:01,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:20:01,311 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 28 proven. 62 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2022-04-06 22:20:01,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:20:01,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249068968] [2022-04-06 22:20:01,312 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:20:01,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837089416] [2022-04-06 22:20:01,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837089416] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:20:01,312 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:20:01,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-04-06 22:20:01,312 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:20:01,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [617282370] [2022-04-06 22:20:01,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [617282370] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:20:01,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:20:01,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 22:20:01,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993543219] [2022-04-06 22:20:01,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:20:01,313 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 22:20:01,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:20:01,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 22:20:01,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-04-06 22:20:01,313 INFO L87 Difference]: Start difference. First operand 455 states and 533 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) [2022-04-06 22:20:01,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:20:01,762 INFO L93 Difference]: Finished difference Result 481 states and 574 transitions. [2022-04-06 22:20:01,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 22:20:01,763 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 [2022-04-06 22:20:01,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:20:01,765 INFO L225 Difference]: With dead ends: 481 [2022-04-06 22:20:01,765 INFO L226 Difference]: Without dead ends: 475 [2022-04-06 22:20:01,765 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 204 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-04-06 22:20:01,766 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 9 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 22:20:01,766 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 292 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 22:20:01,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-04-06 22:20:01,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 449. [2022-04-06 22:20:01,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 292 states have (on average 1.1369863013698631) internal successors, (332), 303 states have internal predecessors, (332), 99 states have call successors, (99), 58 states have call predecessors, (99), 57 states have return successors, (95), 87 states have call predecessors, (95), 95 states have call successors, (95) [2022-04-06 22:20:01,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 526 transitions. [2022-04-06 22:20:01,879 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 526 transitions. Word has length 109 [2022-04-06 22:20:01,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:20:01,880 INFO L478 AbstractCegarLoop]: Abstraction has 449 states and 526 transitions. [2022-04-06 22:20:01,880 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) [2022-04-06 22:20:01,880 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 526 transitions. [2022-04-06 22:20:01,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-04-06 22:20:01,881 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:20:01,881 INFO L499 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] [2022-04-06 22:20:01,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-04-06 22:20:02,096 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 [2022-04-06 22:20:02,096 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:20:02,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:20:02,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1677771575, now seen corresponding path program 33 times [2022-04-06 22:20:02,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:20:02,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1986978705] [2022-04-06 22:20:02,097 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:20:02,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1677771575, now seen corresponding path program 34 times [2022-04-06 22:20:02,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:20:02,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899871211] [2022-04-06 22:20:02,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:20:02,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:20:02,104 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:20:02,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1360380582] [2022-04-06 22:20:02,104 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:20:02,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:20:02,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:20:02,106 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:20:02,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-04-06 22:20:02,168 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:20:02,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:20:02,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 71 conjunts are in the unsatisfiable core [2022-04-06 22:20:02,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:20:03,017 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 84 proven. 129 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-04-06 22:20:03,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:20:03,487 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 129 proven. 16 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2022-04-06 22:20:03,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:20:03,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899871211] [2022-04-06 22:20:03,487 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:20:03,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360380582] [2022-04-06 22:20:03,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360380582] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:20:03,488 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:20:03,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 22 [2022-04-06 22:20:03,488 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:20:03,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1986978705] [2022-04-06 22:20:03,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1986978705] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:20:03,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:20:03,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 22:20:03,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558008809] [2022-04-06 22:20:03,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:20:03,488 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 22:20:03,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:20:03,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 22:20:03,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-04-06 22:20:03,489 INFO L87 Difference]: Start difference. First operand 449 states and 526 transitions. Second operand has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 13 states have internal predecessors, (37), 8 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 8 states have call predecessors, (17), 7 states have call successors, (17) [2022-04-06 22:20:04,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:20:04,881 INFO L93 Difference]: Finished difference Result 497 states and 589 transitions. [2022-04-06 22:20:04,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 22:20:04,882 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 13 states have internal predecessors, (37), 8 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 8 states have call predecessors, (17), 7 states have call successors, (17) Word has length 109 [2022-04-06 22:20:04,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:20:04,884 INFO L225 Difference]: With dead ends: 497 [2022-04-06 22:20:04,884 INFO L226 Difference]: Without dead ends: 487 [2022-04-06 22:20:04,884 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 194 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2022-04-06 22:20:04,884 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 38 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 941 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 22:20:04,885 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 317 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 941 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 22:20:04,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2022-04-06 22:20:05,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 466. [2022-04-06 22:20:05,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 305 states have (on average 1.1344262295081968) internal successors, (346), 316 states have internal predecessors, (346), 100 states have call successors, (100), 61 states have call predecessors, (100), 60 states have return successors, (96), 88 states have call predecessors, (96), 96 states have call successors, (96) [2022-04-06 22:20:05,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 542 transitions. [2022-04-06 22:20:05,025 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 542 transitions. Word has length 109 [2022-04-06 22:20:05,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:20:05,025 INFO L478 AbstractCegarLoop]: Abstraction has 466 states and 542 transitions. [2022-04-06 22:20:05,025 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 13 states have internal predecessors, (37), 8 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 8 states have call predecessors, (17), 7 states have call successors, (17) [2022-04-06 22:20:05,025 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 542 transitions. [2022-04-06 22:20:05,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-04-06 22:20:05,027 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:20:05,027 INFO L499 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] [2022-04-06 22:20:05,051 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-04-06 22:20:05,247 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 [2022-04-06 22:20:05,248 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:20:05,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:20:05,248 INFO L85 PathProgramCache]: Analyzing trace with hash 103380621, now seen corresponding path program 35 times [2022-04-06 22:20:05,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:20:05,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1158037714] [2022-04-06 22:20:05,248 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:20:05,249 INFO L85 PathProgramCache]: Analyzing trace with hash 103380621, now seen corresponding path program 36 times [2022-04-06 22:20:05,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:20:05,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838215527] [2022-04-06 22:20:05,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:20:05,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:20:05,254 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:20:05,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [538490246] [2022-04-06 22:20:05,254 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:20:05,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:20:05,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:20:05,255 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:20:05,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-04-06 22:20:06,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 22:20:06,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:20:06,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 22:20:06,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:20:06,320 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 121 proven. 5 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2022-04-06 22:20:06,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:20:06,582 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 121 proven. 5 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2022-04-06 22:20:06,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:20:06,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838215527] [2022-04-06 22:20:06,582 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:20:06,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538490246] [2022-04-06 22:20:06,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538490246] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:20:06,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:20:06,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 15 [2022-04-06 22:20:06,583 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:20:06,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1158037714] [2022-04-06 22:20:06,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1158037714] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:20:06,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:20:06,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 22:20:06,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616058220] [2022-04-06 22:20:06,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:20:06,583 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 22:20:06,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:20:06,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 22:20:06,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-04-06 22:20:06,584 INFO L87 Difference]: Start difference. First operand 466 states and 542 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) [2022-04-06 22:20:06,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:20:06,926 INFO L93 Difference]: Finished difference Result 476 states and 550 transitions. [2022-04-06 22:20:06,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 22:20:06,927 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 [2022-04-06 22:20:06,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:20:06,929 INFO L225 Difference]: With dead ends: 476 [2022-04-06 22:20:06,929 INFO L226 Difference]: Without dead ends: 455 [2022-04-06 22:20:06,929 INFO L912 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 [2022-04-06 22:20:06,930 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 20 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 22:20:06,930 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 141 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 22:20:06,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2022-04-06 22:20:07,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 450. [2022-04-06 22:20:07,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 301 states have (on average 1.1229235880398671) internal successors, (338), 309 states have internal predecessors, (338), 89 states have call successors, (89), 60 states have call predecessors, (89), 59 states have return successors, (86), 80 states have call predecessors, (86), 86 states have call successors, (86) [2022-04-06 22:20:07,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 513 transitions. [2022-04-06 22:20:07,099 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 513 transitions. Word has length 109 [2022-04-06 22:20:07,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:20:07,100 INFO L478 AbstractCegarLoop]: Abstraction has 450 states and 513 transitions. [2022-04-06 22:20:07,100 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) [2022-04-06 22:20:07,100 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 513 transitions. [2022-04-06 22:20:07,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-04-06 22:20:07,101 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:20:07,101 INFO L499 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] [2022-04-06 22:20:07,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-04-06 22:20:07,309 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 [2022-04-06 22:20:07,309 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:20:07,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:20:07,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1511605586, now seen corresponding path program 9 times [2022-04-06 22:20:07,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:20:07,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1333801182] [2022-04-06 22:20:07,310 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:20:07,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1511605586, now seen corresponding path program 10 times [2022-04-06 22:20:07,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:20:07,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536799334] [2022-04-06 22:20:07,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:20:07,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:20:07,316 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:20:07,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1825341973] [2022-04-06 22:20:07,317 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:20:07,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:20:07,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:20:07,318 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) [2022-04-06 22:20:07,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-04-06 22:20:07,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:20:07,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:20:07,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 22:20:07,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:20:07,558 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 30 proven. 440 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 22:20:07,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:20:07,813 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 30 proven. 80 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2022-04-06 22:20:07,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:20:07,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536799334] [2022-04-06 22:20:07,814 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:20:07,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825341973] [2022-04-06 22:20:07,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825341973] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:20:07,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:20:07,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-04-06 22:20:07,814 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:20:07,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1333801182] [2022-04-06 22:20:07,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1333801182] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:20:07,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:20:07,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 22:20:07,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392814847] [2022-04-06 22:20:07,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:20:07,815 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 22:20:07,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:20:07,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 22:20:07,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-04-06 22:20:07,816 INFO L87 Difference]: Start difference. First operand 450 states and 513 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) [2022-04-06 22:20:08,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:20:08,117 INFO L93 Difference]: Finished difference Result 563 states and 648 transitions. [2022-04-06 22:20:08,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 22:20:08,117 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 [2022-04-06 22:20:08,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:20:08,120 INFO L225 Difference]: With dead ends: 563 [2022-04-06 22:20:08,120 INFO L226 Difference]: Without dead ends: 554 [2022-04-06 22:20:08,120 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 222 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=206, Unknown=0, NotChecked=0, Total=342 [2022-04-06 22:20:08,121 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 27 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:20:08,121 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 152 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:20:08,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2022-04-06 22:20:08,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 538. [2022-04-06 22:20:08,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 363 states have (on average 1.1101928374655647) internal successors, (403), 372 states have internal predecessors, (403), 103 states have call successors, (103), 72 states have call predecessors, (103), 71 states have return successors, (100), 93 states have call predecessors, (100), 100 states have call successors, (100) [2022-04-06 22:20:08,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 606 transitions. [2022-04-06 22:20:08,332 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 606 transitions. Word has length 118 [2022-04-06 22:20:08,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:20:08,333 INFO L478 AbstractCegarLoop]: Abstraction has 538 states and 606 transitions. [2022-04-06 22:20:08,333 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) [2022-04-06 22:20:08,333 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 606 transitions. [2022-04-06 22:20:08,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-04-06 22:20:08,334 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:20:08,335 INFO L499 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] [2022-04-06 22:20:08,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-04-06 22:20:08,559 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 [2022-04-06 22:20:08,559 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:20:08,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:20:08,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1126498815, now seen corresponding path program 11 times [2022-04-06 22:20:08,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:20:08,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [150038939] [2022-04-06 22:20:08,560 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:20:08,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1126498815, now seen corresponding path program 12 times [2022-04-06 22:20:08,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:20:08,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674171314] [2022-04-06 22:20:08,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:20:08,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:20:08,567 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:20:08,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [249197479] [2022-04-06 22:20:08,567 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:20:08,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:20:08,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:20:08,572 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) [2022-04-06 22:20:08,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-04-06 22:20:08,653 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-04-06 22:20:08,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:20:08,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 22:20:08,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:20:08,868 INFO L134 CoverageAnalysis]: Checked inductivity of 769 backedges. 36 proven. 657 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-04-06 22:20:08,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:20:09,095 INFO L134 CoverageAnalysis]: Checked inductivity of 769 backedges. 36 proven. 117 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-04-06 22:20:09,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:20:09,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674171314] [2022-04-06 22:20:09,096 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:20:09,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249197479] [2022-04-06 22:20:09,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249197479] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:20:09,096 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:20:09,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2022-04-06 22:20:09,096 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:20:09,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [150038939] [2022-04-06 22:20:09,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [150038939] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:20:09,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:20:09,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 22:20:09,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026203878] [2022-04-06 22:20:09,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:20:09,098 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 22:20:09,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:20:09,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 22:20:09,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-04-06 22:20:09,099 INFO L87 Difference]: Start difference. First operand 538 states and 606 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) [2022-04-06 22:20:09,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:20:09,402 INFO L93 Difference]: Finished difference Result 662 states and 762 transitions. [2022-04-06 22:20:09,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 22:20:09,402 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 [2022-04-06 22:20:09,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:20:09,405 INFO L225 Difference]: With dead ends: 662 [2022-04-06 22:20:09,405 INFO L226 Difference]: Without dead ends: 653 [2022-04-06 22:20:09,405 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 260 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=231, Unknown=0, NotChecked=0, Total=380 [2022-04-06 22:20:09,405 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 28 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:20:09,406 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 174 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:20:09,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2022-04-06 22:20:09,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 651. [2022-04-06 22:20:09,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 436 states have (on average 1.1077981651376148) internal successors, (483), 448 states have internal predecessors, (483), 130 states have call successors, (130), 85 states have call predecessors, (130), 84 states have return successors, (127), 117 states have call predecessors, (127), 127 states have call successors, (127) [2022-04-06 22:20:09,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 740 transitions. [2022-04-06 22:20:09,652 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 740 transitions. Word has length 137 [2022-04-06 22:20:09,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:20:09,653 INFO L478 AbstractCegarLoop]: Abstraction has 651 states and 740 transitions. [2022-04-06 22:20:09,653 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) [2022-04-06 22:20:09,653 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 740 transitions. [2022-04-06 22:20:09,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-04-06 22:20:09,655 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:20:09,655 INFO L499 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] [2022-04-06 22:20:09,680 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-04-06 22:20:09,880 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 [2022-04-06 22:20:09,880 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:20:09,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:20:09,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1647300850, now seen corresponding path program 13 times [2022-04-06 22:20:09,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:20:09,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1869998923] [2022-04-06 22:20:09,881 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:20:09,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1647300850, now seen corresponding path program 14 times [2022-04-06 22:20:09,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:20:09,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646205261] [2022-04-06 22:20:09,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:20:09,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:20:09,891 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:20:09,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [719237051] [2022-04-06 22:20:09,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:20:09,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:20:09,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:20:09,892 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) [2022-04-06 22:20:09,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-04-06 22:20:09,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:20:09,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:20:09,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 22:20:09,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:20:10,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1047 backedges. 42 proven. 917 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-04-06 22:20:10,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:20:10,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1047 backedges. 42 proven. 161 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2022-04-06 22:20:10,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:20:10,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646205261] [2022-04-06 22:20:10,449 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:20:10,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719237051] [2022-04-06 22:20:10,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719237051] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:20:10,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:20:10,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2022-04-06 22:20:10,449 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:20:10,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1869998923] [2022-04-06 22:20:10,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1869998923] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:20:10,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:20:10,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 22:20:10,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555412323] [2022-04-06 22:20:10,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:20:10,450 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 22:20:10,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:20:10,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 22:20:10,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-04-06 22:20:10,451 INFO L87 Difference]: Start difference. First operand 651 states and 740 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) [2022-04-06 22:20:10,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:20:10,818 INFO L93 Difference]: Finished difference Result 775 states and 896 transitions. [2022-04-06 22:20:10,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 22:20:10,818 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 [2022-04-06 22:20:10,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:20:10,820 INFO L225 Difference]: With dead ends: 775 [2022-04-06 22:20:10,821 INFO L226 Difference]: Without dead ends: 766 [2022-04-06 22:20:10,821 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 298 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2022-04-06 22:20:10,821 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 30 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:20:10,821 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 196 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:20:10,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2022-04-06 22:20:11,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 764. [2022-04-06 22:20:11,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 509 states have (on average 1.106090373280943) internal successors, (563), 524 states have internal predecessors, (563), 157 states have call successors, (157), 98 states have call predecessors, (157), 97 states have return successors, (154), 141 states have call predecessors, (154), 154 states have call successors, (154) [2022-04-06 22:20:11,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 874 transitions. [2022-04-06 22:20:11,089 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 874 transitions. Word has length 156 [2022-04-06 22:20:11,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:20:11,089 INFO L478 AbstractCegarLoop]: Abstraction has 764 states and 874 transitions. [2022-04-06 22:20:11,089 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) [2022-04-06 22:20:11,090 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 874 transitions. [2022-04-06 22:20:11,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-04-06 22:20:11,092 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:20:11,092 INFO L499 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] [2022-04-06 22:20:11,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-04-06 22:20:11,307 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 [2022-04-06 22:20:11,307 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:20:11,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:20:11,308 INFO L85 PathProgramCache]: Analyzing trace with hash -980382111, now seen corresponding path program 15 times [2022-04-06 22:20:11,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:20:11,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1529358658] [2022-04-06 22:20:11,308 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:20:11,309 INFO L85 PathProgramCache]: Analyzing trace with hash -980382111, now seen corresponding path program 16 times [2022-04-06 22:20:11,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:20:11,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973348333] [2022-04-06 22:20:11,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:20:11,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:20:11,315 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:20:11,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [836671849] [2022-04-06 22:20:11,315 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:20:11,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:20:11,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:20:11,316 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) [2022-04-06 22:20:11,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-04-06 22:20:11,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:20:11,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:20:11,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 22:20:11,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:20:11,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 48 proven. 1220 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-04-06 22:20:11,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:20:11,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 48 proven. 212 refuted. 0 times theorem prover too weak. 1108 trivial. 0 not checked. [2022-04-06 22:20:11,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:20:11,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973348333] [2022-04-06 22:20:11,987 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:20:11,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836671849] [2022-04-06 22:20:11,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836671849] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:20:11,987 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:20:11,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2022-04-06 22:20:11,987 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:20:11,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1529358658] [2022-04-06 22:20:11,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1529358658] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:20:11,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:20:11,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 22:20:11,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871929799] [2022-04-06 22:20:11,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:20:11,988 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 22:20:11,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:20:11,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 22:20:11,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-04-06 22:20:11,988 INFO L87 Difference]: Start difference. First operand 764 states and 874 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) [2022-04-06 22:20:12,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:20:12,414 INFO L93 Difference]: Finished difference Result 888 states and 1030 transitions. [2022-04-06 22:20:12,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 22:20:12,414 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 [2022-04-06 22:20:12,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:20:12,418 INFO L225 Difference]: With dead ends: 888 [2022-04-06 22:20:12,418 INFO L226 Difference]: Without dead ends: 879 [2022-04-06 22:20:12,418 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 336 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=175, Invalid=287, Unknown=0, NotChecked=0, Total=462 [2022-04-06 22:20:12,419 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 36 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 178 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 [2022-04-06 22:20:12,419 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 178 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:20:12,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2022-04-06 22:20:12,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 877. [2022-04-06 22:20:12,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 582 states have (on average 1.104810996563574) internal successors, (643), 600 states have internal predecessors, (643), 184 states have call successors, (184), 111 states have call predecessors, (184), 110 states have return successors, (181), 165 states have call predecessors, (181), 181 states have call successors, (181) [2022-04-06 22:20:12,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 1008 transitions. [2022-04-06 22:20:12,717 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 1008 transitions. Word has length 175 [2022-04-06 22:20:12,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:20:12,717 INFO L478 AbstractCegarLoop]: Abstraction has 877 states and 1008 transitions. [2022-04-06 22:20:12,717 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) [2022-04-06 22:20:12,718 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 1008 transitions. [2022-04-06 22:20:12,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-04-06 22:20:12,720 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:20:12,720 INFO L499 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] [2022-04-06 22:20:12,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-04-06 22:20:12,935 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 [2022-04-06 22:20:12,935 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:20:12,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:20:12,936 INFO L85 PathProgramCache]: Analyzing trace with hash -794778478, now seen corresponding path program 17 times [2022-04-06 22:20:12,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:20:12,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [891962355] [2022-04-06 22:20:12,936 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:20:12,936 INFO L85 PathProgramCache]: Analyzing trace with hash -794778478, now seen corresponding path program 18 times [2022-04-06 22:20:12,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:20:12,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637755114] [2022-04-06 22:20:12,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:20:12,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:20:12,947 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:20:12,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [403478272] [2022-04-06 22:20:12,947 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:20:12,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:20:12,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:20:12,948 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) [2022-04-06 22:20:12,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-04-06 22:20:13,104 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-04-06 22:20:13,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:20:13,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 22:20:13,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:20:13,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1732 backedges. 54 proven. 1566 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 22:20:13,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:20:13,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1732 backedges. 54 proven. 270 refuted. 0 times theorem prover too weak. 1408 trivial. 0 not checked. [2022-04-06 22:20:13,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:20:13,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637755114] [2022-04-06 22:20:13,705 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:20:13,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403478272] [2022-04-06 22:20:13,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403478272] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:20:13,705 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:20:13,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2022-04-06 22:20:13,705 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:20:13,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [891962355] [2022-04-06 22:20:13,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [891962355] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:20:13,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:20:13,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 22:20:13,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622410991] [2022-04-06 22:20:13,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:20:13,706 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 22:20:13,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:20:13,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 22:20:13,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-04-06 22:20:13,706 INFO L87 Difference]: Start difference. First operand 877 states and 1008 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) [2022-04-06 22:20:14,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:20:14,190 INFO L93 Difference]: Finished difference Result 1001 states and 1164 transitions. [2022-04-06 22:20:14,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 22:20:14,191 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 [2022-04-06 22:20:14,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:20:14,195 INFO L225 Difference]: With dead ends: 1001 [2022-04-06 22:20:14,195 INFO L226 Difference]: Without dead ends: 992 [2022-04-06 22:20:14,196 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 375 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2022-04-06 22:20:14,196 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 33 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:20:14,197 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 220 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:20:14,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2022-04-06 22:20:14,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 990. [2022-04-06 22:20:14,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 990 states, 655 states have (on average 1.1038167938931298) internal successors, (723), 676 states have internal predecessors, (723), 211 states have call successors, (211), 124 states have call predecessors, (211), 123 states have return successors, (208), 189 states have call predecessors, (208), 208 states have call successors, (208) [2022-04-06 22:20:14,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 990 states to 990 states and 1142 transitions. [2022-04-06 22:20:14,619 INFO L78 Accepts]: Start accepts. Automaton has 990 states and 1142 transitions. Word has length 194 [2022-04-06 22:20:14,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:20:14,619 INFO L478 AbstractCegarLoop]: Abstraction has 990 states and 1142 transitions. [2022-04-06 22:20:14,620 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) [2022-04-06 22:20:14,620 INFO L276 IsEmpty]: Start isEmpty. Operand 990 states and 1142 transitions. [2022-04-06 22:20:14,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-04-06 22:20:14,624 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:20:14,624 INFO L499 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] [2022-04-06 22:20:14,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-04-06 22:20:14,830 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 [2022-04-06 22:20:14,831 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:20:14,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:20:14,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1980311871, now seen corresponding path program 19 times [2022-04-06 22:20:14,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:20:14,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [992763052] [2022-04-06 22:20:14,832 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:20:14,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1980311871, now seen corresponding path program 20 times [2022-04-06 22:20:14,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:20:14,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906498309] [2022-04-06 22:20:14,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:20:14,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:20:14,840 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:20:14,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [26526441] [2022-04-06 22:20:14,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:20:14,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:20:14,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:20:14,842 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) [2022-04-06 22:20:14,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-04-06 22:20:14,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:20:14,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-04-06 22:20:14,931 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 22:20:14,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 22:20:15,066 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 22:20:15,067 INFO L130 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found a feasible trace [2022-04-06 22:20:15,067 INFO L618 BasicCegarLoop]: Counterexample is feasible [2022-04-06 22:20:15,070 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 22:20:15,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-04-06 22:20:15,294 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 [2022-04-06 22:20:15,297 INFO L719 BasicCegarLoop]: Path program histogram: [36, 20, 10, 4, 2, 2, 2, 2, 2, 2, 2] [2022-04-06 22:20:15,301 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 22:20:15,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 10:20:15 BoogieIcfgContainer [2022-04-06 22:20:15,320 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 22:20:15,320 INFO L158 Benchmark]: Toolchain (without parser) took 123781.56ms. Allocated memory was 165.7MB in the beginning and 358.6MB in the end (delta: 192.9MB). Free memory was 108.8MB in the beginning and 145.4MB in the end (delta: -36.6MB). Peak memory consumption was 157.0MB. Max. memory is 8.0GB. [2022-04-06 22:20:15,320 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 165.7MB. Free memory is still 124.8MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 22:20:15,320 INFO L158 Benchmark]: CACSL2BoogieTranslator took 309.46ms. Allocated memory was 165.7MB in the beginning and 206.6MB in the end (delta: 40.9MB). Free memory was 108.6MB in the beginning and 177.9MB in the end (delta: -69.3MB). Peak memory consumption was 11.3MB. Max. memory is 8.0GB. [2022-04-06 22:20:15,320 INFO L158 Benchmark]: Boogie Preprocessor took 43.50ms. Allocated memory is still 206.6MB. Free memory was 177.9MB in the beginning and 176.3MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 22:20:15,321 INFO L158 Benchmark]: RCFGBuilder took 322.73ms. Allocated memory is still 206.6MB. Free memory was 176.3MB in the beginning and 165.3MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-04-06 22:20:15,321 INFO L158 Benchmark]: TraceAbstraction took 123097.66ms. Allocated memory was 206.6MB in the beginning and 358.6MB in the end (delta: 152.0MB). Free memory was 164.8MB in the beginning and 145.4MB in the end (delta: 19.4MB). Peak memory consumption was 171.4MB. Max. memory is 8.0GB. [2022-04-06 22:20:15,321 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 165.7MB. Free memory is still 124.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 309.46ms. Allocated memory was 165.7MB in the beginning and 206.6MB in the end (delta: 40.9MB). Free memory was 108.6MB in the beginning and 177.9MB in the end (delta: -69.3MB). Peak memory consumption was 11.3MB. Max. memory is 8.0GB. * Boogie Preprocessor took 43.50ms. Allocated memory is still 206.6MB. Free memory was 177.9MB in the beginning and 176.3MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 322.73ms. Allocated memory is still 206.6MB. Free memory was 176.3MB in the beginning and 165.3MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 123097.66ms. Allocated memory was 206.6MB in the beginning and 358.6MB in the end (delta: 152.0MB). Free memory was 164.8MB in the beginning and 145.4MB in the end (delta: 19.4MB). Peak memory consumption was 171.4MB. 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++<10 [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++<10 [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++<10 [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++<10 [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++<10 [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++<10 [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++<10 [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++<10 [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++<10 [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++<10 [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++<10) [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: 123.0s, OverallIterations: 42, TraceHistogramMax: 31, PathProgramHistogramMax: 36, EmptinessCheckTime: 0.1s, AutomataDifference: 50.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 6 mSolverCounterUnknown, 1036 SdHoareTripleChecker+Valid, 33.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 810 mSDsluCounter, 7755 SdHoareTripleChecker+Invalid, 31.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 17 IncrementalHoareTripleChecker+Unchecked, 5882 mSDsCounter, 687 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 11286 IncrementalHoareTripleChecker+Invalid, 11996 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 687 mSolverCounterUnsat, 1873 mSDtfsCounter, 11286 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 6559 GetRequests, 5938 SyntacticMatches, 56 SemanticMatches, 565 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 1317 ImplicationChecksByTransitivity, 35.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=990occurred in iteration=41, InterpolantAutomatonStates: 435, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.5s AutomataMinimizationTime, 41 MinimizatonAttempts, 610 StatesRemovedByMinimization, 36 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-04-06 22:20:15,360 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...