/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loop-invgen/heapsort.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 03:37:36,856 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 03:37:36,884 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 03:37:36,918 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 03:37:36,940 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 03:37:36,940 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 03:37:36,941 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 03:37:36,941 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-20 03:37:36,947 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 03:37:36,948 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 03:37:36,948 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 03:37:36,948 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 03:37:36,949 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 03:37:36,949 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 03:37:36,949 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 03:37:36,949 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 03:37:36,949 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 03:37:36,949 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 03:37:36,949 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 03:37:36,949 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 03:37:36,949 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 03:37:36,949 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 03:37:36,950 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 03:37:36,950 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 03:37:36,950 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 03:37:36,950 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 03:37:36,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 03:37:36,950 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 03:37:36,950 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 03:37:36,951 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 03:37:36,951 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 03:37:37,160 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 03:37:37,193 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 03:37:37,195 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 03:37:37,196 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 03:37:37,196 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 03:37:37,198 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/heapsort.i [2022-03-20 03:37:37,244 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb2282cab/55a8b68e83864b78919a14db8ba82f44/FLAG74e2d3aa8 [2022-03-20 03:37:37,563 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 03:37:37,564 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/heapsort.i [2022-03-20 03:37:37,569 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb2282cab/55a8b68e83864b78919a14db8ba82f44/FLAG74e2d3aa8 [2022-03-20 03:37:37,984 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb2282cab/55a8b68e83864b78919a14db8ba82f44 [2022-03-20 03:37:37,986 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 03:37:37,987 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 03:37:37,988 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 03:37:37,988 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 03:37:37,991 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 03:37:37,992 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 03:37:37" (1/1) ... [2022-03-20 03:37:37,995 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58087258 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:37:37, skipping insertion in model container [2022-03-20 03:37:37,995 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 03:37:37" (1/1) ... [2022-03-20 03:37:38,020 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 03:37:38,030 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 03:37:38,157 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/heapsort.i[893,906] [2022-03-20 03:37:38,185 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 03:37:38,194 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 03:37:38,203 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/heapsort.i[893,906] [2022-03-20 03:37:38,222 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 03:37:38,233 INFO L208 MainTranslator]: Completed translation [2022-03-20 03:37:38,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:37:38 WrapperNode [2022-03-20 03:37:38,234 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 03:37:38,234 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 03:37:38,234 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 03:37:38,234 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 03:37:38,241 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:37:38" (1/1) ... [2022-03-20 03:37:38,242 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:37:38" (1/1) ... [2022-03-20 03:37:38,255 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:37:38" (1/1) ... [2022-03-20 03:37:38,255 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:37:38" (1/1) ... [2022-03-20 03:37:38,267 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:37:38" (1/1) ... [2022-03-20 03:37:38,274 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:37:38" (1/1) ... [2022-03-20 03:37:38,275 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:37:38" (1/1) ... [2022-03-20 03:37:38,276 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 03:37:38,276 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 03:37:38,276 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 03:37:38,276 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 03:37:38,279 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:37:38" (1/1) ... [2022-03-20 03:37:38,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 03:37:38,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:37:38,300 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 03:37:38,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 03:37:38,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 03:37:38,352 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 03:37:38,352 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 03:37:38,352 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 03:37:38,352 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 03:37:38,353 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 03:37:38,353 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 03:37:38,353 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 03:37:38,353 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-20 03:37:38,353 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-20 03:37:38,353 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 03:37:38,353 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 03:37:38,353 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 03:37:38,354 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 03:37:38,354 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 03:37:38,355 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 03:37:38,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 03:37:38,356 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 03:37:38,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 03:37:38,356 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 03:37:38,356 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 03:37:38,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 03:37:38,423 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 03:37:38,425 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 03:37:38,570 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 03:37:38,575 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 03:37:38,575 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 03:37:38,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 03:37:38 BoogieIcfgContainer [2022-03-20 03:37:38,577 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 03:37:38,578 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 03:37:38,578 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 03:37:38,579 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 03:37:38,596 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 03:37:38" (1/1) ... [2022-03-20 03:37:38,599 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-03-20 03:37:38,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 03:37:38 BasicIcfg [2022-03-20 03:37:38,619 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 03:37:38,620 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 03:37:38,621 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 03:37:38,623 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 03:37:38,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 03:37:37" (1/4) ... [2022-03-20 03:37:38,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5610d06b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 03:37:38, skipping insertion in model container [2022-03-20 03:37:38,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:37:38" (2/4) ... [2022-03-20 03:37:38,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5610d06b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 03:37:38, skipping insertion in model container [2022-03-20 03:37:38,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 03:37:38" (3/4) ... [2022-03-20 03:37:38,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5610d06b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 03:37:38, skipping insertion in model container [2022-03-20 03:37:38,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 03:37:38" (4/4) ... [2022-03-20 03:37:38,625 INFO L111 eAbstractionObserver]: Analyzing ICFG heapsort.iJordan [2022-03-20 03:37:38,641 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-20 03:37:38,642 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 03:37:38,678 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 03:37:38,682 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 03:37:38,682 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 03:37:38,700 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 03:37:38,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-20 03:37:38,706 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:37:38,707 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:37:38,708 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:37:38,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:37:38,715 INFO L85 PathProgramCache]: Analyzing trace with hash -972496655, now seen corresponding path program 1 times [2022-03-20 03:37:38,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:37:38,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462861025] [2022-03-20 03:37:38,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:37:38,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:37:38,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:38,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:37:38,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:38,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:37:38,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:37:38,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462861025] [2022-03-20 03:37:38,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462861025] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 03:37:38,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 03:37:38,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 03:37:38,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976220381] [2022-03-20 03:37:38,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 03:37:38,909 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 03:37:38,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:37:38,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 03:37:38,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 03:37:38,933 INFO L87 Difference]: Start difference. First operand has 44 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) 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, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:37:39,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:37:39,022 INFO L93 Difference]: Finished difference Result 44 states and 64 transitions. [2022-03-20 03:37:39,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 03:37:39,025 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, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-03-20 03:37:39,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:37:39,034 INFO L225 Difference]: With dead ends: 44 [2022-03-20 03:37:39,034 INFO L226 Difference]: Without dead ends: 39 [2022-03-20 03:37:39,036 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 03:37:39,038 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 29 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 03:37:39,039 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 53 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 03:37:39,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-20 03:37:39,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-03-20 03:37:39,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 16 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 03:37:39,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 58 transitions. [2022-03-20 03:37:39,076 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 58 transitions. Word has length 15 [2022-03-20 03:37:39,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:37:39,076 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 58 transitions. [2022-03-20 03:37:39,076 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, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:37:39,077 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 58 transitions. [2022-03-20 03:37:39,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-20 03:37:39,078 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:37:39,078 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:37:39,078 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 03:37:39,079 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:37:39,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:37:39,081 INFO L85 PathProgramCache]: Analyzing trace with hash -943867504, now seen corresponding path program 1 times [2022-03-20 03:37:39,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:37:39,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787024733] [2022-03-20 03:37:39,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:37:39,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:37:39,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:39,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:37:39,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:39,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:37:39,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:37:39,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787024733] [2022-03-20 03:37:39,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787024733] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 03:37:39,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 03:37:39,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 03:37:39,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579695988] [2022-03-20 03:37:39,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 03:37:39,226 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 03:37:39,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:37:39,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 03:37:39,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 03:37:39,227 INFO L87 Difference]: Start difference. First operand 39 states and 58 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:37:39,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:37:39,412 INFO L93 Difference]: Finished difference Result 44 states and 62 transitions. [2022-03-20 03:37:39,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 03:37:39,412 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-03-20 03:37:39,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:37:39,413 INFO L225 Difference]: With dead ends: 44 [2022-03-20 03:37:39,413 INFO L226 Difference]: Without dead ends: 44 [2022-03-20 03:37:39,414 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 03:37:39,415 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 46 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 03:37:39,415 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 52 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 03:37:39,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-20 03:37:39,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2022-03-20 03:37:39,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 16 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 03:37:39,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 61 transitions. [2022-03-20 03:37:39,423 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 61 transitions. Word has length 15 [2022-03-20 03:37:39,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:37:39,423 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 61 transitions. [2022-03-20 03:37:39,423 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:37:39,423 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 61 transitions. [2022-03-20 03:37:39,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-20 03:37:39,424 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:37:39,424 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:37:39,424 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 03:37:39,424 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:37:39,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:37:39,425 INFO L85 PathProgramCache]: Analyzing trace with hash -944820816, now seen corresponding path program 1 times [2022-03-20 03:37:39,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:37:39,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711401557] [2022-03-20 03:37:39,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:37:39,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:37:39,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:39,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:37:39,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:39,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:37:39,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:37:39,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711401557] [2022-03-20 03:37:39,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711401557] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 03:37:39,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 03:37:39,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 03:37:39,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68531086] [2022-03-20 03:37:39,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 03:37:39,509 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 03:37:39,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:37:39,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 03:37:39,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 03:37:39,510 INFO L87 Difference]: Start difference. First operand 43 states and 61 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:37:39,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:37:39,724 INFO L93 Difference]: Finished difference Result 69 states and 103 transitions. [2022-03-20 03:37:39,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 03:37:39,724 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-03-20 03:37:39,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:37:39,725 INFO L225 Difference]: With dead ends: 69 [2022-03-20 03:37:39,726 INFO L226 Difference]: Without dead ends: 69 [2022-03-20 03:37:39,726 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 03:37:39,727 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 57 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 03:37:39,727 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 56 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 03:37:39,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-20 03:37:39,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 47. [2022-03-20 03:37:39,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 16 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 03:37:39,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 64 transitions. [2022-03-20 03:37:39,733 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 64 transitions. Word has length 15 [2022-03-20 03:37:39,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:37:39,733 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 64 transitions. [2022-03-20 03:37:39,733 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:37:39,733 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 64 transitions. [2022-03-20 03:37:39,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-20 03:37:39,734 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:37:39,734 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:37:39,734 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 03:37:39,734 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:37:39,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:37:39,735 INFO L85 PathProgramCache]: Analyzing trace with hash -914285041, now seen corresponding path program 1 times [2022-03-20 03:37:39,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:37:39,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116663374] [2022-03-20 03:37:39,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:37:39,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:37:39,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:39,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:37:39,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:39,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:37:39,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:37:39,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116663374] [2022-03-20 03:37:39,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116663374] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 03:37:39,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 03:37:39,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 03:37:39,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127520629] [2022-03-20 03:37:39,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 03:37:39,806 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 03:37:39,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:37:39,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 03:37:39,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-20 03:37:39,807 INFO L87 Difference]: Start difference. First operand 47 states and 64 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:37:40,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:37:40,068 INFO L93 Difference]: Finished difference Result 78 states and 113 transitions. [2022-03-20 03:37:40,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 03:37:40,068 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-03-20 03:37:40,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:37:40,069 INFO L225 Difference]: With dead ends: 78 [2022-03-20 03:37:40,069 INFO L226 Difference]: Without dead ends: 78 [2022-03-20 03:37:40,070 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-20 03:37:40,071 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 65 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 03:37:40,071 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 55 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 03:37:40,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-03-20 03:37:40,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 73. [2022-03-20 03:37:40,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 39 states have internal predecessors, (51), 28 states have call successors, (28), 6 states have call predecessors, (28), 5 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-20 03:37:40,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 106 transitions. [2022-03-20 03:37:40,078 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 106 transitions. Word has length 15 [2022-03-20 03:37:40,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:37:40,079 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 106 transitions. [2022-03-20 03:37:40,079 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:37:40,079 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 106 transitions. [2022-03-20 03:37:40,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-20 03:37:40,080 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:37:40,080 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:37:40,080 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-20 03:37:40,080 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:37:40,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:37:40,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1889400257, now seen corresponding path program 1 times [2022-03-20 03:37:40,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:37:40,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14079943] [2022-03-20 03:37:40,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:37:40,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:37:40,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:40,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:37:40,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:40,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 03:37:40,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:40,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:37:40,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:37:40,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14079943] [2022-03-20 03:37:40,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14079943] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 03:37:40,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 03:37:40,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 03:37:40,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964047885] [2022-03-20 03:37:40,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 03:37:40,134 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 03:37:40,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:37:40,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 03:37:40,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 03:37:40,135 INFO L87 Difference]: Start difference. First operand 73 states and 106 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 03:37:40,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:37:40,262 INFO L93 Difference]: Finished difference Result 77 states and 109 transitions. [2022-03-20 03:37:40,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 03:37:40,263 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-03-20 03:37:40,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:37:40,264 INFO L225 Difference]: With dead ends: 77 [2022-03-20 03:37:40,264 INFO L226 Difference]: Without dead ends: 77 [2022-03-20 03:37:40,265 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 03:37:40,265 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 39 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 03:37:40,266 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 55 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 03:37:40,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-20 03:37:40,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-03-20 03:37:40,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 42 states have (on average 1.2857142857142858) internal successors, (54), 42 states have internal predecessors, (54), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-20 03:37:40,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 109 transitions. [2022-03-20 03:37:40,271 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 109 transitions. Word has length 20 [2022-03-20 03:37:40,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:37:40,271 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 109 transitions. [2022-03-20 03:37:40,271 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 03:37:40,272 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 109 transitions. [2022-03-20 03:37:40,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-20 03:37:40,272 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:37:40,272 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:37:40,272 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-20 03:37:40,272 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:37:40,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:37:40,273 INFO L85 PathProgramCache]: Analyzing trace with hash -403505695, now seen corresponding path program 1 times [2022-03-20 03:37:40,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:37:40,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266674785] [2022-03-20 03:37:40,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:37:40,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:37:40,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:40,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:37:40,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:40,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 03:37:40,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:40,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:37:40,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:37:40,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266674785] [2022-03-20 03:37:40,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266674785] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 03:37:40,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 03:37:40,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 03:37:40,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278425694] [2022-03-20 03:37:40,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 03:37:40,360 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 03:37:40,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:37:40,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 03:37:40,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-03-20 03:37:40,361 INFO L87 Difference]: Start difference. First operand 77 states and 109 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 03:37:40,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:37:40,597 INFO L93 Difference]: Finished difference Result 108 states and 158 transitions. [2022-03-20 03:37:40,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 03:37:40,598 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-03-20 03:37:40,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:37:40,598 INFO L225 Difference]: With dead ends: 108 [2022-03-20 03:37:40,598 INFO L226 Difference]: Without dead ends: 108 [2022-03-20 03:37:40,599 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-20 03:37:40,599 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 78 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 03:37:40,600 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 69 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 03:37:40,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-03-20 03:37:40,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 105. [2022-03-20 03:37:40,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 55 states have (on average 1.309090909090909) internal successors, (72), 56 states have internal predecessors, (72), 42 states have call successors, (42), 8 states have call predecessors, (42), 7 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) [2022-03-20 03:37:40,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 155 transitions. [2022-03-20 03:37:40,607 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 155 transitions. Word has length 20 [2022-03-20 03:37:40,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:37:40,607 INFO L478 AbstractCegarLoop]: Abstraction has 105 states and 155 transitions. [2022-03-20 03:37:40,607 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 03:37:40,607 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 155 transitions. [2022-03-20 03:37:40,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-20 03:37:40,608 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:37:40,608 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:37:40,608 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-20 03:37:40,608 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:37:40,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:37:40,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1922571531, now seen corresponding path program 1 times [2022-03-20 03:37:40,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:37:40,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299449640] [2022-03-20 03:37:40,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:37:40,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:37:40,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:40,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:37:40,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:40,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 03:37:40,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:40,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:37:40,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:37:40,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299449640] [2022-03-20 03:37:40,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299449640] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 03:37:40,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 03:37:40,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 03:37:40,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539374948] [2022-03-20 03:37:40,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 03:37:40,679 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 03:37:40,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:37:40,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 03:37:40,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-03-20 03:37:40,679 INFO L87 Difference]: Start difference. First operand 105 states and 155 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 03:37:40,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:37:40,965 INFO L93 Difference]: Finished difference Result 157 states and 242 transitions. [2022-03-20 03:37:40,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 03:37:40,966 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-03-20 03:37:40,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:37:40,967 INFO L225 Difference]: With dead ends: 157 [2022-03-20 03:37:40,967 INFO L226 Difference]: Without dead ends: 157 [2022-03-20 03:37:40,967 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-20 03:37:40,968 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 87 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 03:37:40,968 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 75 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 03:37:40,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-03-20 03:37:40,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 141. [2022-03-20 03:37:40,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 70 states have (on average 1.3571428571428572) internal successors, (95), 73 states have internal predecessors, (95), 62 states have call successors, (62), 9 states have call predecessors, (62), 8 states have return successors, (61), 58 states have call predecessors, (61), 61 states have call successors, (61) [2022-03-20 03:37:40,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 218 transitions. [2022-03-20 03:37:40,978 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 218 transitions. Word has length 20 [2022-03-20 03:37:40,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:37:40,978 INFO L478 AbstractCegarLoop]: Abstraction has 141 states and 218 transitions. [2022-03-20 03:37:40,978 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 03:37:40,978 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 218 transitions. [2022-03-20 03:37:40,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-20 03:37:40,979 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:37:40,979 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:37:40,979 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-20 03:37:40,979 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:37:40,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:37:40,980 INFO L85 PathProgramCache]: Analyzing trace with hash -696908702, now seen corresponding path program 1 times [2022-03-20 03:37:40,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:37:40,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25808389] [2022-03-20 03:37:40,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:37:40,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:37:40,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:41,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:37:41,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:41,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 03:37:41,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:41,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:37:41,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:37:41,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25808389] [2022-03-20 03:37:41,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25808389] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 03:37:41,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 03:37:41,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 03:37:41,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646248961] [2022-03-20 03:37:41,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 03:37:41,014 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 03:37:41,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:37:41,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 03:37:41,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 03:37:41,015 INFO L87 Difference]: Start difference. First operand 141 states and 218 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 03:37:41,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:37:41,104 INFO L93 Difference]: Finished difference Result 209 states and 339 transitions. [2022-03-20 03:37:41,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 03:37:41,105 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-03-20 03:37:41,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:37:41,108 INFO L225 Difference]: With dead ends: 209 [2022-03-20 03:37:41,108 INFO L226 Difference]: Without dead ends: 209 [2022-03-20 03:37:41,108 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 03:37:41,109 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 36 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 03:37:41,109 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 71 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 03:37:41,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-03-20 03:37:41,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2022-03-20 03:37:41,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 100 states have (on average 1.4) internal successors, (140), 104 states have internal predecessors, (140), 100 states have call successors, (100), 9 states have call predecessors, (100), 8 states have return successors, (99), 95 states have call predecessors, (99), 99 states have call successors, (99) [2022-03-20 03:37:41,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 339 transitions. [2022-03-20 03:37:41,120 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 339 transitions. Word has length 20 [2022-03-20 03:37:41,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:37:41,121 INFO L478 AbstractCegarLoop]: Abstraction has 209 states and 339 transitions. [2022-03-20 03:37:41,121 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 03:37:41,121 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 339 transitions. [2022-03-20 03:37:41,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-20 03:37:41,122 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:37:41,122 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:37:41,122 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-20 03:37:41,122 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:37:41,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:37:41,122 INFO L85 PathProgramCache]: Analyzing trace with hash 2078992758, now seen corresponding path program 1 times [2022-03-20 03:37:41,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:37:41,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884655114] [2022-03-20 03:37:41,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:37:41,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:37:41,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:41,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:37:41,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:41,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 03:37:41,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:41,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:37:41,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:37:41,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884655114] [2022-03-20 03:37:41,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884655114] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 03:37:41,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 03:37:41,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 03:37:41,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108517130] [2022-03-20 03:37:41,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 03:37:41,155 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 03:37:41,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:37:41,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 03:37:41,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-20 03:37:41,156 INFO L87 Difference]: Start difference. First operand 209 states and 339 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 03:37:41,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:37:41,251 INFO L93 Difference]: Finished difference Result 194 states and 310 transitions. [2022-03-20 03:37:41,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 03:37:41,253 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-03-20 03:37:41,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:37:41,254 INFO L225 Difference]: With dead ends: 194 [2022-03-20 03:37:41,254 INFO L226 Difference]: Without dead ends: 187 [2022-03-20 03:37:41,254 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-03-20 03:37:41,255 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 31 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 03:37:41,255 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 55 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 03:37:41,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-03-20 03:37:41,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2022-03-20 03:37:41,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 90 states have (on average 1.3888888888888888) internal successors, (125), 94 states have internal predecessors, (125), 88 states have call successors, (88), 9 states have call predecessors, (88), 8 states have return successors, (87), 83 states have call predecessors, (87), 87 states have call successors, (87) [2022-03-20 03:37:41,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 300 transitions. [2022-03-20 03:37:41,264 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 300 transitions. Word has length 20 [2022-03-20 03:37:41,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:37:41,265 INFO L478 AbstractCegarLoop]: Abstraction has 187 states and 300 transitions. [2022-03-20 03:37:41,265 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 03:37:41,265 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 300 transitions. [2022-03-20 03:37:41,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 03:37:41,265 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:37:41,265 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:37:41,266 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-20 03:37:41,266 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:37:41,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:37:41,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1238440984, now seen corresponding path program 1 times [2022-03-20 03:37:41,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:37:41,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413290402] [2022-03-20 03:37:41,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:37:41,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:37:41,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:41,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:37:41,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:41,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 03:37:41,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:41,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 03:37:41,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:41,313 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 03:37:41,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:37:41,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413290402] [2022-03-20 03:37:41,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413290402] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 03:37:41,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 03:37:41,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 03:37:41,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940335942] [2022-03-20 03:37:41,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 03:37:41,314 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 03:37:41,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:37:41,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 03:37:41,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-20 03:37:41,315 INFO L87 Difference]: Start difference. First operand 187 states and 300 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 03:37:41,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:37:41,541 INFO L93 Difference]: Finished difference Result 219 states and 350 transitions. [2022-03-20 03:37:41,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 03:37:41,542 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2022-03-20 03:37:41,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:37:41,544 INFO L225 Difference]: With dead ends: 219 [2022-03-20 03:37:41,544 INFO L226 Difference]: Without dead ends: 219 [2022-03-20 03:37:41,544 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-20 03:37:41,544 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 79 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 03:37:41,545 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 61 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 03:37:41,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-03-20 03:37:41,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 201. [2022-03-20 03:37:41,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 97 states have (on average 1.3814432989690721) internal successors, (134), 103 states have internal predecessors, (134), 94 states have call successors, (94), 10 states have call predecessors, (94), 9 states have return successors, (93), 87 states have call predecessors, (93), 93 states have call successors, (93) [2022-03-20 03:37:41,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 321 transitions. [2022-03-20 03:37:41,553 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 321 transitions. Word has length 27 [2022-03-20 03:37:41,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:37:41,553 INFO L478 AbstractCegarLoop]: Abstraction has 201 states and 321 transitions. [2022-03-20 03:37:41,553 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 03:37:41,553 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 321 transitions. [2022-03-20 03:37:41,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 03:37:41,554 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:37:41,554 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:37:41,554 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-20 03:37:41,554 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:37:41,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:37:41,555 INFO L85 PathProgramCache]: Analyzing trace with hash 511466180, now seen corresponding path program 1 times [2022-03-20 03:37:41,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:37:41,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92027078] [2022-03-20 03:37:41,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:37:41,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:37:41,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:41,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:37:41,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:41,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 03:37:41,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:41,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 03:37:41,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:41,591 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 03:37:41,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:37:41,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92027078] [2022-03-20 03:37:41,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92027078] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 03:37:41,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 03:37:41,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 03:37:41,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080257231] [2022-03-20 03:37:41,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 03:37:41,592 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 03:37:41,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:37:41,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 03:37:41,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-20 03:37:41,593 INFO L87 Difference]: Start difference. First operand 201 states and 321 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 03:37:41,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:37:41,868 INFO L93 Difference]: Finished difference Result 370 states and 614 transitions. [2022-03-20 03:37:41,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 03:37:41,869 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2022-03-20 03:37:41,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:37:41,871 INFO L225 Difference]: With dead ends: 370 [2022-03-20 03:37:41,871 INFO L226 Difference]: Without dead ends: 370 [2022-03-20 03:37:41,871 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-03-20 03:37:41,871 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 114 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 03:37:41,871 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 48 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 03:37:41,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-03-20 03:37:41,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 201. [2022-03-20 03:37:41,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 97 states have (on average 1.3608247422680413) internal successors, (132), 103 states have internal predecessors, (132), 94 states have call successors, (94), 10 states have call predecessors, (94), 9 states have return successors, (93), 87 states have call predecessors, (93), 93 states have call successors, (93) [2022-03-20 03:37:41,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 319 transitions. [2022-03-20 03:37:41,882 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 319 transitions. Word has length 29 [2022-03-20 03:37:41,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:37:41,882 INFO L478 AbstractCegarLoop]: Abstraction has 201 states and 319 transitions. [2022-03-20 03:37:41,882 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 03:37:41,882 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 319 transitions. [2022-03-20 03:37:41,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 03:37:41,883 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:37:41,883 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:37:41,883 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-20 03:37:41,883 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:37:41,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:37:41,883 INFO L85 PathProgramCache]: Analyzing trace with hash 810931569, now seen corresponding path program 1 times [2022-03-20 03:37:41,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:37:41,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965265801] [2022-03-20 03:37:41,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:37:41,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:37:41,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:41,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:37:41,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:41,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 03:37:41,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:41,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 03:37:41,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:41,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-20 03:37:41,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:41,956 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 03:37:41,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:37:41,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965265801] [2022-03-20 03:37:41,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965265801] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 03:37:41,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 03:37:41,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 03:37:41,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824093554] [2022-03-20 03:37:41,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 03:37:41,957 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 03:37:41,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:37:41,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 03:37:41,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-20 03:37:41,958 INFO L87 Difference]: Start difference. First operand 201 states and 319 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 03:37:42,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:37:42,156 INFO L93 Difference]: Finished difference Result 293 states and 473 transitions. [2022-03-20 03:37:42,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 03:37:42,157 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (6), 3 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 30 [2022-03-20 03:37:42,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:37:42,158 INFO L225 Difference]: With dead ends: 293 [2022-03-20 03:37:42,158 INFO L226 Difference]: Without dead ends: 293 [2022-03-20 03:37:42,159 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-20 03:37:42,159 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 46 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 03:37:42,159 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 75 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 03:37:42,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-03-20 03:37:42,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 273. [2022-03-20 03:37:42,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 119 states have (on average 1.361344537815126) internal successors, (162), 133 states have internal predecessors, (162), 142 states have call successors, (142), 12 states have call predecessors, (142), 11 states have return successors, (141), 127 states have call predecessors, (141), 141 states have call successors, (141) [2022-03-20 03:37:42,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 445 transitions. [2022-03-20 03:37:42,170 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 445 transitions. Word has length 30 [2022-03-20 03:37:42,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:37:42,170 INFO L478 AbstractCegarLoop]: Abstraction has 273 states and 445 transitions. [2022-03-20 03:37:42,170 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 03:37:42,170 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 445 transitions. [2022-03-20 03:37:42,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 03:37:42,171 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:37:42,171 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:37:42,171 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-20 03:37:42,171 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:37:42,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:37:42,171 INFO L85 PathProgramCache]: Analyzing trace with hash 573878194, now seen corresponding path program 1 times [2022-03-20 03:37:42,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:37:42,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034056464] [2022-03-20 03:37:42,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:37:42,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:37:42,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:42,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:37:42,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:42,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 03:37:42,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:42,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 03:37:42,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:42,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-20 03:37:42,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:42,222 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 03:37:42,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:37:42,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034056464] [2022-03-20 03:37:42,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034056464] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 03:37:42,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 03:37:42,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 03:37:42,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686740551] [2022-03-20 03:37:42,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 03:37:42,223 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 03:37:42,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:37:42,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 03:37:42,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-03-20 03:37:42,224 INFO L87 Difference]: Start difference. First operand 273 states and 445 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 03:37:42,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:37:42,446 INFO L93 Difference]: Finished difference Result 319 states and 518 transitions. [2022-03-20 03:37:42,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 03:37:42,446 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 3 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 32 [2022-03-20 03:37:42,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:37:42,449 INFO L225 Difference]: With dead ends: 319 [2022-03-20 03:37:42,449 INFO L226 Difference]: Without dead ends: 319 [2022-03-20 03:37:42,449 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-03-20 03:37:42,450 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 107 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 03:37:42,450 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 66 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 03:37:42,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-03-20 03:37:42,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 291. [2022-03-20 03:37:42,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 126 states have (on average 1.3571428571428572) internal successors, (171), 142 states have internal predecessors, (171), 152 states have call successors, (152), 13 states have call predecessors, (152), 12 states have return successors, (151), 135 states have call predecessors, (151), 151 states have call successors, (151) [2022-03-20 03:37:42,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 474 transitions. [2022-03-20 03:37:42,461 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 474 transitions. Word has length 32 [2022-03-20 03:37:42,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:37:42,462 INFO L478 AbstractCegarLoop]: Abstraction has 291 states and 474 transitions. [2022-03-20 03:37:42,462 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 03:37:42,462 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 474 transitions. [2022-03-20 03:37:42,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-20 03:37:42,462 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:37:42,462 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:37:42,462 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-03-20 03:37:42,463 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:37:42,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:37:42,463 INFO L85 PathProgramCache]: Analyzing trace with hash 630142183, now seen corresponding path program 1 times [2022-03-20 03:37:42,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:37:42,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326967669] [2022-03-20 03:37:42,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:37:42,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:37:42,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:42,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:37:42,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:42,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 03:37:42,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:42,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 03:37:42,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:42,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-20 03:37:42,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:42,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-20 03:37:42,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:42,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-20 03:37:42,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:42,536 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 03:37:42,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:37:42,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326967669] [2022-03-20 03:37:42,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326967669] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 03:37:42,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 03:37:42,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 03:37:42,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438278812] [2022-03-20 03:37:42,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 03:37:42,537 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 03:37:42,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:37:42,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 03:37:42,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-03-20 03:37:42,538 INFO L87 Difference]: Start difference. First operand 291 states and 474 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-20 03:37:42,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:37:42,764 INFO L93 Difference]: Finished difference Result 331 states and 529 transitions. [2022-03-20 03:37:42,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 03:37:42,764 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2022-03-20 03:37:42,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:37:42,767 INFO L225 Difference]: With dead ends: 331 [2022-03-20 03:37:42,767 INFO L226 Difference]: Without dead ends: 331 [2022-03-20 03:37:42,767 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-20 03:37:42,767 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 58 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 03:37:42,767 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 79 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 03:37:42,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-03-20 03:37:42,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 295. [2022-03-20 03:37:42,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 129 states have (on average 1.3488372093023255) internal successors, (174), 145 states have internal predecessors, (174), 152 states have call successors, (152), 14 states have call predecessors, (152), 13 states have return successors, (151), 135 states have call predecessors, (151), 151 states have call successors, (151) [2022-03-20 03:37:42,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 477 transitions. [2022-03-20 03:37:42,779 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 477 transitions. Word has length 42 [2022-03-20 03:37:42,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:37:42,779 INFO L478 AbstractCegarLoop]: Abstraction has 295 states and 477 transitions. [2022-03-20 03:37:42,779 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-20 03:37:42,779 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 477 transitions. [2022-03-20 03:37:42,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-20 03:37:42,780 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:37:42,780 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:37:42,780 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-03-20 03:37:42,781 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:37:42,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:37:42,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1507674262, now seen corresponding path program 1 times [2022-03-20 03:37:42,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:37:42,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344217751] [2022-03-20 03:37:42,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:37:42,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:37:42,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:42,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:37:42,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:42,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 03:37:42,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:42,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 03:37:42,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:42,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-20 03:37:42,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:42,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-20 03:37:42,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:42,849 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 03:37:42,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:37:42,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344217751] [2022-03-20 03:37:42,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344217751] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 03:37:42,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 03:37:42,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 03:37:42,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034465324] [2022-03-20 03:37:42,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 03:37:42,850 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 03:37:42,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:37:42,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 03:37:42,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-03-20 03:37:42,850 INFO L87 Difference]: Start difference. First operand 295 states and 477 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 03:37:42,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:37:42,990 INFO L93 Difference]: Finished difference Result 299 states and 480 transitions. [2022-03-20 03:37:42,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 03:37:42,991 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (7), 3 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 42 [2022-03-20 03:37:42,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:37:42,992 INFO L225 Difference]: With dead ends: 299 [2022-03-20 03:37:42,992 INFO L226 Difference]: Without dead ends: 299 [2022-03-20 03:37:42,992 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-20 03:37:42,993 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 52 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 03:37:42,993 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 57 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 03:37:42,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-03-20 03:37:43,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2022-03-20 03:37:43,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 132 states have (on average 1.3409090909090908) internal successors, (177), 148 states have internal predecessors, (177), 152 states have call successors, (152), 15 states have call predecessors, (152), 14 states have return successors, (151), 135 states have call predecessors, (151), 151 states have call successors, (151) [2022-03-20 03:37:43,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 480 transitions. [2022-03-20 03:37:43,002 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 480 transitions. Word has length 42 [2022-03-20 03:37:43,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:37:43,002 INFO L478 AbstractCegarLoop]: Abstraction has 299 states and 480 transitions. [2022-03-20 03:37:43,002 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 03:37:43,002 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 480 transitions. [2022-03-20 03:37:43,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-20 03:37:43,003 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:37:43,003 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:37:43,003 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-03-20 03:37:43,003 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:37:43,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:37:43,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1060746045, now seen corresponding path program 1 times [2022-03-20 03:37:43,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:37:43,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805877146] [2022-03-20 03:37:43,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:37:43,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:37:43,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:43,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:37:43,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:43,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 03:37:43,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:43,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 03:37:43,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:43,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-20 03:37:43,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:43,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-20 03:37:43,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:43,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-20 03:37:43,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:43,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-20 03:37:43,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:43,051 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 03:37:43,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:37:43,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805877146] [2022-03-20 03:37:43,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805877146] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 03:37:43,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 03:37:43,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 03:37:43,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523222195] [2022-03-20 03:37:43,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 03:37:43,052 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 03:37:43,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:37:43,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 03:37:43,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-03-20 03:37:43,053 INFO L87 Difference]: Start difference. First operand 299 states and 480 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 03:37:43,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:37:43,265 INFO L93 Difference]: Finished difference Result 331 states and 527 transitions. [2022-03-20 03:37:43,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 03:37:43,266 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 54 [2022-03-20 03:37:43,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:37:43,267 INFO L225 Difference]: With dead ends: 331 [2022-03-20 03:37:43,267 INFO L226 Difference]: Without dead ends: 331 [2022-03-20 03:37:43,267 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-03-20 03:37:43,268 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 78 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 03:37:43,268 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 66 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 03:37:43,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-03-20 03:37:43,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 178. [2022-03-20 03:37:43,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 86 states have (on average 1.2674418604651163) internal successors, (109), 94 states have internal predecessors, (109), 78 states have call successors, (78), 14 states have call predecessors, (78), 13 states have return successors, (77), 69 states have call predecessors, (77), 77 states have call successors, (77) [2022-03-20 03:37:43,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 264 transitions. [2022-03-20 03:37:43,297 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 264 transitions. Word has length 54 [2022-03-20 03:37:43,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:37:43,297 INFO L478 AbstractCegarLoop]: Abstraction has 178 states and 264 transitions. [2022-03-20 03:37:43,297 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 03:37:43,297 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 264 transitions. [2022-03-20 03:37:43,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-20 03:37:43,298 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:37:43,298 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:37:43,298 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-03-20 03:37:43,298 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:37:43,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:37:43,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1039189609, now seen corresponding path program 1 times [2022-03-20 03:37:43,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:37:43,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098310270] [2022-03-20 03:37:43,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:37:43,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:37:43,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:43,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:37:43,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:43,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 03:37:43,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:43,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 03:37:43,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:43,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-20 03:37:43,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:43,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-20 03:37:43,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:43,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-20 03:37:43,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:43,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-20 03:37:43,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:43,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-20 03:37:43,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:43,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-03-20 03:37:43,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:43,359 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-20 03:37:43,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:37:43,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098310270] [2022-03-20 03:37:43,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098310270] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:37:43,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865841620] [2022-03-20 03:37:43,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:37:43,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:37:43,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:37:43,361 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 03:37:43,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 03:37:43,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:43,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 03:37:43,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:37:43,670 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-03-20 03:37:43,671 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 03:37:43,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865841620] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 03:37:43,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 03:37:43,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 10 [2022-03-20 03:37:43,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914778122] [2022-03-20 03:37:43,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 03:37:43,672 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 03:37:43,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:37:43,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 03:37:43,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-03-20 03:37:43,672 INFO L87 Difference]: Start difference. First operand 178 states and 264 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 03:37:43,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:37:43,773 INFO L93 Difference]: Finished difference Result 339 states and 547 transitions. [2022-03-20 03:37:43,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 03:37:43,773 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 62 [2022-03-20 03:37:43,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:37:43,775 INFO L225 Difference]: With dead ends: 339 [2022-03-20 03:37:43,775 INFO L226 Difference]: Without dead ends: 339 [2022-03-20 03:37:43,775 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-03-20 03:37:43,776 INFO L913 BasicCegarLoop]: 77 mSDtfsCounter, 39 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 03:37:43,776 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 190 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 03:37:43,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-03-20 03:37:43,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 315. [2022-03-20 03:37:43,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 137 states have (on average 1.3430656934306568) internal successors, (184), 153 states have internal predecessors, (184), 164 states have call successors, (164), 14 states have call predecessors, (164), 13 states have return successors, (163), 147 states have call predecessors, (163), 163 states have call successors, (163) [2022-03-20 03:37:43,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 511 transitions. [2022-03-20 03:37:43,786 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 511 transitions. Word has length 62 [2022-03-20 03:37:43,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:37:43,787 INFO L478 AbstractCegarLoop]: Abstraction has 315 states and 511 transitions. [2022-03-20 03:37:43,787 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 03:37:43,787 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 511 transitions. [2022-03-20 03:37:43,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-03-20 03:37:43,789 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:37:43,789 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:37:43,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 03:37:44,006 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-20 03:37:44,006 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:37:44,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:37:44,006 INFO L85 PathProgramCache]: Analyzing trace with hash 544844568, now seen corresponding path program 1 times [2022-03-20 03:37:44,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:37:44,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855408139] [2022-03-20 03:37:44,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:37:44,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:37:44,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:44,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:37:44,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:44,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 03:37:44,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:44,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 03:37:44,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:44,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-20 03:37:44,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:44,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-20 03:37:44,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:44,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-20 03:37:44,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:44,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-20 03:37:44,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:44,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-03-20 03:37:44,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:44,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-20 03:37:44,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:44,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-20 03:37:44,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:44,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-20 03:37:44,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:44,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-03-20 03:37:44,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:44,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-03-20 03:37:44,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:44,110 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-20 03:37:44,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:37:44,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855408139] [2022-03-20 03:37:44,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855408139] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:37:44,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646899274] [2022-03-20 03:37:44,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:37:44,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:37:44,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:37:44,120 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 03:37:44,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 03:37:44,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:44,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 03:37:44,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:37:44,607 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2022-03-20 03:37:44,607 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 03:37:44,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646899274] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 03:37:44,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 03:37:44,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2022-03-20 03:37:44,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719515004] [2022-03-20 03:37:44,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 03:37:44,608 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 03:37:44,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:37:44,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 03:37:44,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-03-20 03:37:44,609 INFO L87 Difference]: Start difference. First operand 315 states and 511 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-20 03:37:44,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:37:44,775 INFO L93 Difference]: Finished difference Result 307 states and 479 transitions. [2022-03-20 03:37:44,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 03:37:44,776 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 84 [2022-03-20 03:37:44,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:37:44,777 INFO L225 Difference]: With dead ends: 307 [2022-03-20 03:37:44,777 INFO L226 Difference]: Without dead ends: 307 [2022-03-20 03:37:44,778 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-03-20 03:37:44,778 INFO L913 BasicCegarLoop]: 90 mSDtfsCounter, 29 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 03:37:44,778 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 329 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 03:37:44,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-03-20 03:37:44,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 271. [2022-03-20 03:37:44,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 125 states have (on average 1.312) internal successors, (164), 137 states have internal predecessors, (164), 132 states have call successors, (132), 14 states have call predecessors, (132), 13 states have return successors, (131), 119 states have call predecessors, (131), 131 states have call successors, (131) [2022-03-20 03:37:44,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 427 transitions. [2022-03-20 03:37:44,787 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 427 transitions. Word has length 84 [2022-03-20 03:37:44,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:37:44,788 INFO L478 AbstractCegarLoop]: Abstraction has 271 states and 427 transitions. [2022-03-20 03:37:44,788 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-20 03:37:44,788 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 427 transitions. [2022-03-20 03:37:44,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-03-20 03:37:44,789 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:37:44,789 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:37:44,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 03:37:45,006 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,SelfDestructingSolverStorable17 [2022-03-20 03:37:45,006 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:37:45,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:37:45,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1314014583, now seen corresponding path program 1 times [2022-03-20 03:37:45,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:37:45,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812809131] [2022-03-20 03:37:45,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:37:45,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:37:45,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:45,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:37:45,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:45,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 03:37:45,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:45,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 03:37:45,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:45,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-20 03:37:45,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:45,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-20 03:37:45,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:45,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-20 03:37:45,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:45,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-20 03:37:45,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:45,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-03-20 03:37:45,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:45,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-20 03:37:45,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:45,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-20 03:37:45,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:45,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-20 03:37:45,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:45,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-03-20 03:37:45,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:45,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-03-20 03:37:45,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:45,078 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-20 03:37:45,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:37:45,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812809131] [2022-03-20 03:37:45,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812809131] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:37:45,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246964076] [2022-03-20 03:37:45,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:37:45,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:37:45,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:37:45,091 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 03:37:45,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 03:37:45,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:45,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-20 03:37:45,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:37:45,557 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2022-03-20 03:37:45,557 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 03:37:45,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246964076] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 03:37:45,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 03:37:45,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2022-03-20 03:37:45,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518182508] [2022-03-20 03:37:45,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 03:37:45,558 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 03:37:45,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:37:45,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 03:37:45,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-03-20 03:37:45,558 INFO L87 Difference]: Start difference. First operand 271 states and 427 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-03-20 03:37:45,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:37:45,658 INFO L93 Difference]: Finished difference Result 271 states and 422 transitions. [2022-03-20 03:37:45,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 03:37:45,659 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 84 [2022-03-20 03:37:45,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:37:45,660 INFO L225 Difference]: With dead ends: 271 [2022-03-20 03:37:45,660 INFO L226 Difference]: Without dead ends: 225 [2022-03-20 03:37:45,660 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-03-20 03:37:45,660 INFO L913 BasicCegarLoop]: 67 mSDtfsCounter, 20 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 03:37:45,661 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 176 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 03:37:45,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-03-20 03:37:45,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 214. [2022-03-20 03:37:45,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 100 states have (on average 1.28) internal successors, (128), 110 states have internal predecessors, (128), 100 states have call successors, (100), 14 states have call predecessors, (100), 13 states have return successors, (99), 89 states have call predecessors, (99), 99 states have call successors, (99) [2022-03-20 03:37:45,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 327 transitions. [2022-03-20 03:37:45,667 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 327 transitions. Word has length 84 [2022-03-20 03:37:45,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:37:45,667 INFO L478 AbstractCegarLoop]: Abstraction has 214 states and 327 transitions. [2022-03-20 03:37:45,667 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-03-20 03:37:45,667 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 327 transitions. [2022-03-20 03:37:45,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-20 03:37:45,668 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:37:45,668 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:37:45,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 03:37:45,885 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:37:45,886 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:37:45,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:37:45,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1425381294, now seen corresponding path program 1 times [2022-03-20 03:37:45,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:37:45,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016358925] [2022-03-20 03:37:45,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:37:45,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:37:45,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:45,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:37:45,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:45,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 03:37:45,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:45,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 03:37:45,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:45,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-20 03:37:45,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:45,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-20 03:37:45,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:45,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-20 03:37:45,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:45,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-20 03:37:45,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:45,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-20 03:37:45,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:45,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-20 03:37:45,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:45,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-20 03:37:45,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:45,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-03-20 03:37:45,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:45,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-03-20 03:37:45,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:45,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-03-20 03:37:45,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:45,976 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-20 03:37:45,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:37:45,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016358925] [2022-03-20 03:37:45,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016358925] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:37:45,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261317230] [2022-03-20 03:37:45,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:37:45,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:37:45,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:37:45,996 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 03:37:46,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 03:37:46,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:46,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 03:37:46,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:37:46,211 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 149 proven. 2 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-03-20 03:37:46,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:37:46,374 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-03-20 03:37:46,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261317230] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:37:46,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:37:46,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 17 [2022-03-20 03:37:46,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194014360] [2022-03-20 03:37:46,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:37:46,375 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 03:37:46,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:37:46,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 03:37:46,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2022-03-20 03:37:46,375 INFO L87 Difference]: Start difference. First operand 214 states and 327 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 15 states have internal predecessors, (58), 7 states have call successors, (36), 4 states have call predecessors, (36), 2 states have return successors, (33), 7 states have call predecessors, (33), 7 states have call successors, (33) [2022-03-20 03:37:48,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:37:48,092 INFO L93 Difference]: Finished difference Result 325 states and 484 transitions. [2022-03-20 03:37:48,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-20 03:37:48,092 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 15 states have internal predecessors, (58), 7 states have call successors, (36), 4 states have call predecessors, (36), 2 states have return successors, (33), 7 states have call predecessors, (33), 7 states have call successors, (33) Word has length 89 [2022-03-20 03:37:48,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:37:48,094 INFO L225 Difference]: With dead ends: 325 [2022-03-20 03:37:48,094 INFO L226 Difference]: Without dead ends: 325 [2022-03-20 03:37:48,094 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=493, Invalid=1399, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 03:37:48,095 INFO L913 BasicCegarLoop]: 113 mSDtfsCounter, 188 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 2177 mSolverCounterSat, 925 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 3102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 925 IncrementalHoareTripleChecker+Valid, 2177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 03:37:48,095 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 170 Invalid, 3102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [925 Valid, 2177 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-20 03:37:48,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-03-20 03:37:48,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 245. [2022-03-20 03:37:48,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 122 states have (on average 1.2540983606557377) internal successors, (153), 132 states have internal predecessors, (153), 107 states have call successors, (107), 16 states have call predecessors, (107), 15 states have return successors, (106), 96 states have call predecessors, (106), 106 states have call successors, (106) [2022-03-20 03:37:48,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 366 transitions. [2022-03-20 03:37:48,103 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 366 transitions. Word has length 89 [2022-03-20 03:37:48,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:37:48,103 INFO L478 AbstractCegarLoop]: Abstraction has 245 states and 366 transitions. [2022-03-20 03:37:48,103 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 15 states have internal predecessors, (58), 7 states have call successors, (36), 4 states have call predecessors, (36), 2 states have return successors, (33), 7 states have call predecessors, (33), 7 states have call successors, (33) [2022-03-20 03:37:48,103 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 366 transitions. [2022-03-20 03:37:48,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-20 03:37:48,104 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:37:48,104 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:37:48,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 03:37:48,322 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:37:48,322 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:37:48,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:37:48,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1303481827, now seen corresponding path program 1 times [2022-03-20 03:37:48,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:37:48,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450775627] [2022-03-20 03:37:48,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:37:48,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:37:48,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:48,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:37:48,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:48,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 03:37:48,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:48,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 03:37:48,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:48,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-20 03:37:48,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:48,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-20 03:37:48,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:48,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-20 03:37:48,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:48,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-20 03:37:48,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:48,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-20 03:37:48,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:48,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-03-20 03:37:48,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:48,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-20 03:37:48,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:48,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-03-20 03:37:48,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:48,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-03-20 03:37:48,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:48,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-03-20 03:37:48,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:48,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-20 03:37:48,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:48,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-03-20 03:37:48,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:48,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-03-20 03:37:48,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:48,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-03-20 03:37:48,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:48,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-03-20 03:37:48,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:48,438 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 47 proven. 8 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-03-20 03:37:48,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:37:48,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450775627] [2022-03-20 03:37:48,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450775627] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:37:48,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011724911] [2022-03-20 03:37:48,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:37:48,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:37:48,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:37:48,445 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 03:37:48,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 03:37:48,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:48,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-20 03:37:48,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:37:48,842 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 210 proven. 7 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2022-03-20 03:37:48,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:37:49,128 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 47 proven. 8 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-03-20 03:37:49,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011724911] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:37:49,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:37:49,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-03-20 03:37:49,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142143014] [2022-03-20 03:37:49,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:37:49,129 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 03:37:49,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:37:49,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 03:37:49,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-03-20 03:37:49,130 INFO L87 Difference]: Start difference. First operand 245 states and 366 transitions. Second operand has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 21 states have internal predecessors, (60), 13 states have call successors, (50), 3 states have call predecessors, (50), 2 states have return successors, (47), 13 states have call predecessors, (47), 13 states have call successors, (47) [2022-03-20 03:37:52,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:37:52,541 INFO L93 Difference]: Finished difference Result 698 states and 1091 transitions. [2022-03-20 03:37:52,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-20 03:37:52,541 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 21 states have internal predecessors, (60), 13 states have call successors, (50), 3 states have call predecessors, (50), 2 states have return successors, (47), 13 states have call predecessors, (47), 13 states have call successors, (47) Word has length 116 [2022-03-20 03:37:52,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:37:52,544 INFO L225 Difference]: With dead ends: 698 [2022-03-20 03:37:52,544 INFO L226 Difference]: Without dead ends: 517 [2022-03-20 03:37:52,546 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2053 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1625, Invalid=5181, Unknown=0, NotChecked=0, Total=6806 [2022-03-20 03:37:52,546 INFO L913 BasicCegarLoop]: 115 mSDtfsCounter, 426 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 3327 mSolverCounterSat, 1596 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 4923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1596 IncrementalHoareTripleChecker+Valid, 3327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-20 03:37:52,546 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [438 Valid, 167 Invalid, 4923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1596 Valid, 3327 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-03-20 03:37:52,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-03-20 03:37:52,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 374. [2022-03-20 03:37:52,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 171 states have (on average 1.263157894736842) internal successors, (216), 185 states have internal predecessors, (216), 188 states have call successors, (188), 15 states have call predecessors, (188), 14 states have return successors, (187), 173 states have call predecessors, (187), 187 states have call successors, (187) [2022-03-20 03:37:52,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 591 transitions. [2022-03-20 03:37:52,560 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 591 transitions. Word has length 116 [2022-03-20 03:37:52,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:37:52,560 INFO L478 AbstractCegarLoop]: Abstraction has 374 states and 591 transitions. [2022-03-20 03:37:52,560 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 21 states have internal predecessors, (60), 13 states have call successors, (50), 3 states have call predecessors, (50), 2 states have return successors, (47), 13 states have call predecessors, (47), 13 states have call successors, (47) [2022-03-20 03:37:52,560 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 591 transitions. [2022-03-20 03:37:52,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-20 03:37:52,561 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:37:52,562 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:37:52,593 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-20 03:37:52,794 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:37:52,794 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:37:52,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:37:52,794 INFO L85 PathProgramCache]: Analyzing trace with hash -673023202, now seen corresponding path program 1 times [2022-03-20 03:37:52,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:37:52,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126584530] [2022-03-20 03:37:52,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:37:52,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:37:52,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:52,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:37:52,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:52,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 03:37:52,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:52,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 03:37:52,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:52,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-20 03:37:52,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:52,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-20 03:37:52,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:52,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-20 03:37:52,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:52,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-20 03:37:52,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:52,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-20 03:37:52,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:52,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-03-20 03:37:52,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:52,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-20 03:37:52,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:52,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-03-20 03:37:52,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:52,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-03-20 03:37:52,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:52,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-03-20 03:37:52,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:52,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-20 03:37:52,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:52,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-03-20 03:37:52,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:52,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-03-20 03:37:52,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:52,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-03-20 03:37:52,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:52,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-03-20 03:37:52,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:52,891 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 34 proven. 21 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-03-20 03:37:52,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:37:52,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126584530] [2022-03-20 03:37:52,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126584530] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:37:52,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431491907] [2022-03-20 03:37:52,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:37:52,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:37:52,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:37:52,904 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 03:37:52,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 03:37:52,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:52,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 03:37:52,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:37:53,292 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 34 proven. 21 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-03-20 03:37:53,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:37:53,580 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 34 proven. 21 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-03-20 03:37:53,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431491907] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:37:53,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:37:53,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 21 [2022-03-20 03:37:53,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415789182] [2022-03-20 03:37:53,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:37:53,582 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 03:37:53,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:37:53,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 03:37:53,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-03-20 03:37:53,582 INFO L87 Difference]: Start difference. First operand 374 states and 591 transitions. Second operand has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 18 states have internal predecessors, (68), 9 states have call successors, (53), 4 states have call predecessors, (53), 1 states have return successors, (48), 9 states have call predecessors, (48), 9 states have call successors, (48) [2022-03-20 03:37:55,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:37:55,421 INFO L93 Difference]: Finished difference Result 907 states and 1442 transitions. [2022-03-20 03:37:55,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 03:37:55,421 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 18 states have internal predecessors, (68), 9 states have call successors, (53), 4 states have call predecessors, (53), 1 states have return successors, (48), 9 states have call predecessors, (48), 9 states have call successors, (48) Word has length 116 [2022-03-20 03:37:55,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:37:55,425 INFO L225 Difference]: With dead ends: 907 [2022-03-20 03:37:55,425 INFO L226 Difference]: Without dead ends: 786 [2022-03-20 03:37:55,425 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 257 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=509, Invalid=1653, Unknown=0, NotChecked=0, Total=2162 [2022-03-20 03:37:55,426 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 314 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 2596 mSolverCounterSat, 994 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 3590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 994 IncrementalHoareTripleChecker+Valid, 2596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-20 03:37:55,426 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 134 Invalid, 3590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [994 Valid, 2596 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-20 03:37:55,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2022-03-20 03:37:55,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 418. [2022-03-20 03:37:55,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 186 states have (on average 1.2741935483870968) internal successors, (237), 208 states have internal predecessors, (237), 214 states have call successors, (214), 18 states have call predecessors, (214), 17 states have return successors, (213), 191 states have call predecessors, (213), 213 states have call successors, (213) [2022-03-20 03:37:55,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 664 transitions. [2022-03-20 03:37:55,443 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 664 transitions. Word has length 116 [2022-03-20 03:37:55,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:37:55,444 INFO L478 AbstractCegarLoop]: Abstraction has 418 states and 664 transitions. [2022-03-20 03:37:55,444 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 18 states have internal predecessors, (68), 9 states have call successors, (53), 4 states have call predecessors, (53), 1 states have return successors, (48), 9 states have call predecessors, (48), 9 states have call successors, (48) [2022-03-20 03:37:55,444 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 664 transitions. [2022-03-20 03:37:55,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-03-20 03:37:55,446 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:37:55,446 INFO L499 BasicCegarLoop]: trace histogram [32, 31, 31, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2022-03-20 03:37:55,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 03:37:55,659 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:37:55,660 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:37:55,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:37:55,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1294944744, now seen corresponding path program 2 times [2022-03-20 03:37:55,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:37:55,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210282877] [2022-03-20 03:37:55,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:37:55,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:37:55,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:55,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:37:55,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:55,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 03:37:55,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:55,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 03:37:55,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:55,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-20 03:37:55,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:55,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-20 03:37:55,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:55,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-20 03:37:55,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:55,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-20 03:37:55,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:55,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-20 03:37:55,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:55,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-03-20 03:37:55,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:55,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-20 03:37:55,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:55,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-03-20 03:37:55,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:55,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-03-20 03:37:55,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:55,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-03-20 03:37:55,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:55,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-20 03:37:55,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:55,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-03-20 03:37:55,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:55,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-03-20 03:37:55,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:55,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-03-20 03:37:55,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:55,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-03-20 03:37:55,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:55,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-03-20 03:37:55,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:55,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-03-20 03:37:55,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:55,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-03-20 03:37:55,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:55,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-03-20 03:37:55,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:55,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-03-20 03:37:55,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:55,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-03-20 03:37:55,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:55,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-03-20 03:37:55,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:55,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-03-20 03:37:55,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:55,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-03-20 03:37:55,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:55,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2022-03-20 03:37:55,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:55,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2022-03-20 03:37:55,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:55,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-03-20 03:37:55,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:55,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2022-03-20 03:37:55,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:55,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2022-03-20 03:37:55,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:37:55,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1986 backedges. 62 proven. 47 refuted. 0 times theorem prover too weak. 1877 trivial. 0 not checked. [2022-03-20 03:37:55,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:37:55,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210282877] [2022-03-20 03:37:55,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210282877] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:37:55,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539531129] [2022-03-20 03:37:55,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 03:37:55,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:37:55,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:37:55,872 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 03:37:55,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 03:37:55,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 03:37:55,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:37:55,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 03:37:55,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:37:56,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1986 backedges. 430 proven. 26 refuted. 0 times theorem prover too weak. 1530 trivial. 0 not checked. [2022-03-20 03:37:56,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:37:57,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1986 backedges. 81 proven. 45 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2022-03-20 03:37:57,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539531129] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:37:57,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:37:57,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 27 [2022-03-20 03:37:57,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916406372] [2022-03-20 03:37:57,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:37:57,090 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-20 03:37:57,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:37:57,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-20 03:37:57,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2022-03-20 03:37:57,091 INFO L87 Difference]: Start difference. First operand 418 states and 664 transitions. Second operand has 27 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 25 states have internal predecessors, (95), 15 states have call successors, (88), 4 states have call predecessors, (88), 2 states have return successors, (84), 15 states have call predecessors, (84), 15 states have call successors, (84) [2022-03-20 03:38:07,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:38:07,243 INFO L93 Difference]: Finished difference Result 1509 states and 2487 transitions. [2022-03-20 03:38:07,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-03-20 03:38:07,244 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 25 states have internal predecessors, (95), 15 states have call successors, (88), 4 states have call predecessors, (88), 2 states have return successors, (84), 15 states have call predecessors, (84), 15 states have call successors, (84) Word has length 195 [2022-03-20 03:38:07,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:38:07,244 INFO L225 Difference]: With dead ends: 1509 [2022-03-20 03:38:07,244 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 03:38:07,248 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 581 GetRequests, 439 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7071 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=3750, Invalid=16842, Unknown=0, NotChecked=0, Total=20592 [2022-03-20 03:38:07,248 INFO L913 BasicCegarLoop]: 141 mSDtfsCounter, 705 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 8076 mSolverCounterSat, 3586 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 705 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 11662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3586 IncrementalHoareTripleChecker+Valid, 8076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-03-20 03:38:07,248 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [705 Valid, 233 Invalid, 11662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3586 Valid, 8076 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-03-20 03:38:07,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 03:38:07,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 03:38:07,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-20 03:38:07,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 03:38:07,249 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 195 [2022-03-20 03:38:07,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:38:07,249 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 03:38:07,249 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 25 states have internal predecessors, (95), 15 states have call successors, (88), 4 states have call predecessors, (88), 2 states have return successors, (84), 15 states have call predecessors, (84), 15 states have call successors, (84) [2022-03-20 03:38:07,249 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 03:38:07,249 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 03:38:07,262 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 03:38:07,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 03:38:07,475 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:38:07,478 INFO L719 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:38:07,479 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 03:38:07,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 03:38:07 BasicIcfg [2022-03-20 03:38:07,480 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 03:38:07,481 INFO L158 Benchmark]: Toolchain (without parser) took 29493.66ms. Allocated memory was 213.9MB in the beginning and 457.2MB in the end (delta: 243.3MB). Free memory was 160.8MB in the beginning and 286.3MB in the end (delta: -125.5MB). Peak memory consumption was 117.1MB. Max. memory is 8.0GB. [2022-03-20 03:38:07,481 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 213.9MB. Free memory is still 177.1MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 03:38:07,481 INFO L158 Benchmark]: CACSL2BoogieTranslator took 245.57ms. Allocated memory is still 213.9MB. Free memory was 160.6MB in the beginning and 186.7MB in the end (delta: -26.1MB). Peak memory consumption was 4.9MB. Max. memory is 8.0GB. [2022-03-20 03:38:07,481 INFO L158 Benchmark]: Boogie Preprocessor took 41.53ms. Allocated memory is still 213.9MB. Free memory was 186.7MB in the beginning and 185.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-20 03:38:07,481 INFO L158 Benchmark]: RCFGBuilder took 301.00ms. Allocated memory is still 213.9MB. Free memory was 185.0MB in the beginning and 173.2MB in the end (delta: 11.8MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-20 03:38:07,481 INFO L158 Benchmark]: IcfgTransformer took 41.72ms. Allocated memory is still 213.9MB. Free memory was 173.2MB in the beginning and 171.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-20 03:38:07,482 INFO L158 Benchmark]: TraceAbstraction took 28860.02ms. Allocated memory was 213.9MB in the beginning and 457.2MB in the end (delta: 243.3MB). Free memory was 171.1MB in the beginning and 286.3MB in the end (delta: -115.2MB). Peak memory consumption was 128.0MB. Max. memory is 8.0GB. [2022-03-20 03:38:07,482 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 213.9MB. Free memory is still 177.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 245.57ms. Allocated memory is still 213.9MB. Free memory was 160.6MB in the beginning and 186.7MB in the end (delta: -26.1MB). Peak memory consumption was 4.9MB. Max. memory is 8.0GB. * Boogie Preprocessor took 41.53ms. Allocated memory is still 213.9MB. Free memory was 186.7MB in the beginning and 185.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 301.00ms. Allocated memory is still 213.9MB. Free memory was 185.0MB in the beginning and 173.2MB in the end (delta: 11.8MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 41.72ms. Allocated memory is still 213.9MB. Free memory was 173.2MB in the beginning and 171.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 28860.02ms. Allocated memory was 213.9MB in the beginning and 457.2MB in the end (delta: 243.3MB). Free memory was 171.1MB in the beginning and 286.3MB in the end (delta: -115.2MB). Peak memory consumption was 128.0MB. 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 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 44 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 28.8s, OverallIterations: 23, TraceHistogramMax: 32, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 20.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2821 SdHoareTripleChecker+Valid, 12.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2723 mSDsluCounter, 2392 SdHoareTripleChecker+Invalid, 10.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1047 mSDsCounter, 8719 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 20371 IncrementalHoareTripleChecker+Invalid, 29090 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 8719 mSolverCounterUnsat, 1345 mSDtfsCounter, 20371 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2071 GetRequests, 1570 SyntacticMatches, 4 SemanticMatches, 497 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10051 ImplicationChecksByTransitivity, 8.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=418occurred in iteration=22, InterpolantAutomatonStates: 393, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 23 MinimizatonAttempts, 1133 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 5.2s InterpolantComputationTime, 1908 NumberOfCodeBlocks, 1908 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 2390 ConstructedInterpolants, 0 QuantifiedInterpolants, 7774 SizeOfPredicates, 34 NumberOfNonLiveVariables, 1699 ConjunctsInSsa, 57 ConjunctsInUnsatCore, 34 InterpolantComputations, 19 PerfectInterpolantSequences, 11918/12154 InterpolantCoveringCapability, 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-03-20 03:38:07,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...