/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/nla-digbench-scaling/hard2_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 06:24:35,530 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 06:24:35,532 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 06:24:35,552 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 06:24:35,573 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 06:24:35,574 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 06:24:35,574 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 06:24:35,575 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-20 06:24:35,581 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 06:24:35,581 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 06:24:35,582 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 06:24:35,583 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 06:24:35,583 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 06:24:35,583 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 06:24:35,583 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 06:24:35,583 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 06:24:35,583 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 06:24:35,583 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 06:24:35,583 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 06:24:35,584 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 06:24:35,584 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 06:24:35,584 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 06:24:35,584 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 06:24:35,584 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 06:24:35,584 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 06:24:35,584 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 06:24:35,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 06:24:35,585 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 06:24:35,585 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 06:24:35,586 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 06:24:35,586 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 06:24:35,813 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 06:24:35,834 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 06:24:35,836 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 06:24:35,837 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 06:24:35,840 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 06:24:35,841 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound50.c [2022-03-20 06:24:35,897 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d094675dc/08c8d57b67a44ee6aeabd873249fd21c/FLAGfc2b3d74d [2022-03-20 06:24:36,274 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 06:24:36,274 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound50.c [2022-03-20 06:24:36,286 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d094675dc/08c8d57b67a44ee6aeabd873249fd21c/FLAGfc2b3d74d [2022-03-20 06:24:36,302 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d094675dc/08c8d57b67a44ee6aeabd873249fd21c [2022-03-20 06:24:36,305 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 06:24:36,308 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 06:24:36,311 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 06:24:36,311 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 06:24:36,314 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 06:24:36,315 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 06:24:36" (1/1) ... [2022-03-20 06:24:36,316 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dfd638 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:24:36, skipping insertion in model container [2022-03-20 06:24:36,316 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 06:24:36" (1/1) ... [2022-03-20 06:24:36,321 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 06:24:36,337 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 06:24:36,492 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound50.c[526,539] [2022-03-20 06:24:36,527 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 06:24:36,535 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 06:24:36,547 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound50.c[526,539] [2022-03-20 06:24:36,558 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 06:24:36,573 INFO L208 MainTranslator]: Completed translation [2022-03-20 06:24:36,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:24:36 WrapperNode [2022-03-20 06:24:36,574 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 06:24:36,576 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 06:24:36,576 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 06:24:36,576 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 06:24:36,584 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:24:36" (1/1) ... [2022-03-20 06:24:36,585 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:24:36" (1/1) ... [2022-03-20 06:24:36,590 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:24:36" (1/1) ... [2022-03-20 06:24:36,590 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:24:36" (1/1) ... [2022-03-20 06:24:36,599 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:24:36" (1/1) ... [2022-03-20 06:24:36,603 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:24:36" (1/1) ... [2022-03-20 06:24:36,607 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:24:36" (1/1) ... [2022-03-20 06:24:36,609 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 06:24:36,610 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 06:24:36,610 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 06:24:36,610 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 06:24:36,611 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:24:36" (1/1) ... [2022-03-20 06:24:36,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 06:24:36,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:24:36,647 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 06:24:36,682 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 06:24:36,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 06:24:36,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 06:24:36,695 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 06:24:36,695 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 06:24:36,695 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 06:24:36,695 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 06:24:36,695 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 06:24:36,696 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 06:24:36,696 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 06:24:36,696 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 06:24:36,696 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 06:24:36,696 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 06:24:36,696 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 06:24:36,696 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 06:24:36,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 06:24:36,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 06:24:36,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 06:24:36,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 06:24:36,698 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 06:24:36,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 06:24:36,747 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 06:24:36,748 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 06:24:36,890 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 06:24:36,894 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 06:24:36,894 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 06:24:36,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 06:24:36 BoogieIcfgContainer [2022-03-20 06:24:36,896 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 06:24:36,896 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 06:24:36,896 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 06:24:36,918 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 06:24:36,921 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 06:24:36" (1/1) ... [2022-03-20 06:24:36,923 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-03-20 06:24:36,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 06:24:36 BasicIcfg [2022-03-20 06:24:36,933 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 06:24:36,934 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 06:24:36,934 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 06:24:36,951 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 06:24:36,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 06:24:36" (1/4) ... [2022-03-20 06:24:36,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d374510 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 06:24:36, skipping insertion in model container [2022-03-20 06:24:36,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:24:36" (2/4) ... [2022-03-20 06:24:36,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d374510 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 06:24:36, skipping insertion in model container [2022-03-20 06:24:36,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 06:24:36" (3/4) ... [2022-03-20 06:24:36,953 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d374510 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 06:24:36, skipping insertion in model container [2022-03-20 06:24:36,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 06:24:36" (4/4) ... [2022-03-20 06:24:36,954 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_valuebound50.cJordan [2022-03-20 06:24:36,957 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-20 06:24:36,957 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 06:24:37,001 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 06:24:37,007 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 06:24:37,008 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 06:24:37,019 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 06:24:37,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 06:24:37,026 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:24:37,026 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:24:37,027 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:24:37,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:24:37,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1625753047, now seen corresponding path program 1 times [2022-03-20 06:24:37,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:24:37,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824428251] [2022-03-20 06:24:37,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:24:37,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:24:37,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:24:37,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 06:24:37,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:24:37,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 06:24:37,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:24:37,210 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 06:24:37,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:24:37,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824428251] [2022-03-20 06:24:37,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824428251] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 06:24:37,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 06:24:37,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 06:24:37,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136665984] [2022-03-20 06:24:37,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 06:24:37,218 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 06:24:37,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:24:37,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 06:24:37,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 06:24:37,247 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 06:24:37,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:24:37,326 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2022-03-20 06:24:37,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 06:24:37,332 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-20 06:24:37,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:24:37,340 INFO L225 Difference]: With dead ends: 35 [2022-03-20 06:24:37,340 INFO L226 Difference]: Without dead ends: 30 [2022-03-20 06:24:37,341 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 06:24:37,343 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 06:24:37,344 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 38 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 06:24:37,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-20 06:24:37,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-03-20 06:24:37,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 06:24:37,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2022-03-20 06:24:37,371 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 17 [2022-03-20 06:24:37,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:24:37,372 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2022-03-20 06:24:37,372 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 06:24:37,372 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2022-03-20 06:24:37,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 06:24:37,372 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:24:37,372 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:24:37,373 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 06:24:37,373 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:24:37,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:24:37,373 INFO L85 PathProgramCache]: Analyzing trace with hash 861759786, now seen corresponding path program 1 times [2022-03-20 06:24:37,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:24:37,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947847561] [2022-03-20 06:24:37,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:24:37,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:24:37,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:24:37,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 06:24:37,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:24:37,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 06:24:37,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:24:37,446 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 06:24:37,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:24:37,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947847561] [2022-03-20 06:24:37,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947847561] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 06:24:37,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 06:24:37,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 06:24:37,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501652481] [2022-03-20 06:24:37,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 06:24:37,448 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 06:24:37,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:24:37,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 06:24:37,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 06:24:37,450 INFO L87 Difference]: Start difference. First operand 30 states and 38 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 06:24:37,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:24:37,594 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2022-03-20 06:24:37,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 06:24:37,595 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-20 06:24:37,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:24:37,596 INFO L225 Difference]: With dead ends: 41 [2022-03-20 06:24:37,596 INFO L226 Difference]: Without dead ends: 41 [2022-03-20 06:24:37,596 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 06:24:37,597 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 37 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 06:24:37,598 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 45 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 06:24:37,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-20 06:24:37,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2022-03-20 06:24:37,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 06:24:37,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2022-03-20 06:24:37,605 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 17 [2022-03-20 06:24:37,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:24:37,606 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2022-03-20 06:24:37,606 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 06:24:37,606 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2022-03-20 06:24:37,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 06:24:37,607 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:24:37,607 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:24:37,607 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 06:24:37,607 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:24:37,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:24:37,608 INFO L85 PathProgramCache]: Analyzing trace with hash 325569287, now seen corresponding path program 1 times [2022-03-20 06:24:37,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:24:37,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332714399] [2022-03-20 06:24:37,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:24:37,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:24:37,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:24:37,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 06:24:37,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:24:37,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 06:24:37,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:24:37,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 06:24:37,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:24:37,781 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 06:24:37,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:24:37,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332714399] [2022-03-20 06:24:37,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332714399] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 06:24:37,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 06:24:37,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 06:24:37,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063313187] [2022-03-20 06:24:37,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 06:24:37,783 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 06:24:37,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:24:37,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 06:24:37,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 06:24:37,784 INFO L87 Difference]: Start difference. First operand 34 states and 41 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, (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 06:24:37,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:24:37,965 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2022-03-20 06:24:37,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 06:24:37,967 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, (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 22 [2022-03-20 06:24:37,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:24:37,967 INFO L225 Difference]: With dead ends: 45 [2022-03-20 06:24:37,968 INFO L226 Difference]: Without dead ends: 45 [2022-03-20 06:24:37,968 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 06:24:37,969 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 32 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 06:24:37,969 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 45 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 06:24:37,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-20 06:24:37,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2022-03-20 06:24:37,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 06:24:37,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2022-03-20 06:24:37,974 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 22 [2022-03-20 06:24:37,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:24:37,975 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2022-03-20 06:24:37,975 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, (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 06:24:37,975 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2022-03-20 06:24:37,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 06:24:37,976 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:24:37,976 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 06:24:37,976 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 06:24:37,976 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:24:37,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:24:37,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1461652409, now seen corresponding path program 1 times [2022-03-20 06:24:37,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:24:37,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078401506] [2022-03-20 06:24:37,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:24:37,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:24:38,003 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:24:38,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [951403224] [2022-03-20 06:24:38,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:24:38,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:24:38,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:24:38,006 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 06:24:38,007 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 06:24:38,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:24:38,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 06:24:38,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:24:38,181 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 06:24:38,181 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 06:24:38,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:24:38,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078401506] [2022-03-20 06:24:38,181 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:24:38,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951403224] [2022-03-20 06:24:38,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951403224] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 06:24:38,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 06:24:38,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 06:24:38,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082171447] [2022-03-20 06:24:38,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 06:24:38,183 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 06:24:38,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:24:38,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 06:24:38,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 06:24:38,183 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 06:24:38,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:24:38,218 INFO L93 Difference]: Finished difference Result 53 states and 65 transitions. [2022-03-20 06:24:38,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 06:24:38,218 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2022-03-20 06:24:38,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:24:38,219 INFO L225 Difference]: With dead ends: 53 [2022-03-20 06:24:38,219 INFO L226 Difference]: Without dead ends: 52 [2022-03-20 06:24:38,219 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 06:24:38,220 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 8 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 06:24:38,221 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 138 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 06:24:38,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-20 06:24:38,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-03-20 06:24:38,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 06:24:38,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2022-03-20 06:24:38,227 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 27 [2022-03-20 06:24:38,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:24:38,227 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2022-03-20 06:24:38,227 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 06:24:38,228 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2022-03-20 06:24:38,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 06:24:38,228 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:24:38,228 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, 1, 1] [2022-03-20 06:24:38,249 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 06:24:38,445 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:24:38,446 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:24:38,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:24:38,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1008917278, now seen corresponding path program 1 times [2022-03-20 06:24:38,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:24:38,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308837132] [2022-03-20 06:24:38,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:24:38,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:24:38,457 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:24:38,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [899134610] [2022-03-20 06:24:38,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:24:38,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:24:38,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:24:38,461 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 06:24:38,462 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 06:24:38,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:24:38,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 06:24:38,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:24:38,593 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 06:24:38,593 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 06:24:38,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:24:38,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308837132] [2022-03-20 06:24:38,593 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:24:38,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899134610] [2022-03-20 06:24:38,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899134610] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 06:24:38,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 06:24:38,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 06:24:38,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257045392] [2022-03-20 06:24:38,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 06:24:38,594 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 06:24:38,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:24:38,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 06:24:38,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 06:24:38,595 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 06:24:38,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:24:38,628 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2022-03-20 06:24:38,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 06:24:38,628 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-03-20 06:24:38,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:24:38,629 INFO L225 Difference]: With dead ends: 63 [2022-03-20 06:24:38,629 INFO L226 Difference]: Without dead ends: 58 [2022-03-20 06:24:38,630 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 06:24:38,630 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 9 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 06:24:38,631 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 112 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 06:24:38,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-03-20 06:24:38,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2022-03-20 06:24:38,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 35 states have internal predecessors, (39), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 06:24:38,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2022-03-20 06:24:38,636 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 34 [2022-03-20 06:24:38,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:24:38,636 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2022-03-20 06:24:38,636 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 06:24:38,637 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2022-03-20 06:24:38,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 06:24:38,637 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:24:38,637 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:24:38,657 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 06:24:38,855 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:24:38,856 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:24:38,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:24:38,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1762200840, now seen corresponding path program 1 times [2022-03-20 06:24:38,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:24:38,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496386836] [2022-03-20 06:24:38,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:24:38,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:24:38,865 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:24:38,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [12264391] [2022-03-20 06:24:38,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:24:38,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:24:38,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:24:38,867 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 06:24:38,868 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 06:24:38,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:24:38,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 06:24:38,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:24:39,017 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 06:24:39,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:24:39,109 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-20 06:24:39,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:24:39,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496386836] [2022-03-20 06:24:39,110 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:24:39,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12264391] [2022-03-20 06:24:39,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12264391] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 06:24:39,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 06:24:39,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-03-20 06:24:39,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737052143] [2022-03-20 06:24:39,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 06:24:39,111 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 06:24:39,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:24:39,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 06:24:39,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-20 06:24:39,111 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 06:24:39,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:24:39,145 INFO L93 Difference]: Finished difference Result 67 states and 82 transitions. [2022-03-20 06:24:39,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 06:24:39,146 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2022-03-20 06:24:39,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:24:39,148 INFO L225 Difference]: With dead ends: 67 [2022-03-20 06:24:39,148 INFO L226 Difference]: Without dead ends: 67 [2022-03-20 06:24:39,148 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 06:24:39,149 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 8 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 06:24:39,149 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 122 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 06:24:39,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-20 06:24:39,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2022-03-20 06:24:39,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 37 states have (on average 1.162162162162162) internal successors, (43), 40 states have internal predecessors, (43), 18 states have call successors, (18), 9 states have call predecessors, (18), 8 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 06:24:39,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2022-03-20 06:24:39,154 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 44 [2022-03-20 06:24:39,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:24:39,154 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2022-03-20 06:24:39,155 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 06:24:39,155 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2022-03-20 06:24:39,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-20 06:24:39,156 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:24:39,156 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, 1, 1] [2022-03-20 06:24:39,177 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-20 06:24:39,370 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:24:39,371 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:24:39,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:24:39,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1382136022, now seen corresponding path program 1 times [2022-03-20 06:24:39,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:24:39,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651531380] [2022-03-20 06:24:39,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:24:39,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:24:39,387 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:24:39,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1532044587] [2022-03-20 06:24:39,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:24:39,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:24:39,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:24:39,399 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 06:24:39,424 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 06:24:39,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:24:39,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 06:24:39,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:24:39,770 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 06:24:39,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:24:40,573 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 06:24:40,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:24:40,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651531380] [2022-03-20 06:24:40,573 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:24:40,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532044587] [2022-03-20 06:24:40,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532044587] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 06:24:40,574 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 06:24:40,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-03-20 06:24:40,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438896497] [2022-03-20 06:24:40,574 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 06:24:40,574 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 06:24:40,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:24:40,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 06:24:40,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-20 06:24:40,575 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 7 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-20 06:24:42,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:24:42,546 INFO L93 Difference]: Finished difference Result 131 states and 176 transitions. [2022-03-20 06:24:42,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 06:24:42,547 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 7 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 64 [2022-03-20 06:24:42,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:24:42,549 INFO L225 Difference]: With dead ends: 131 [2022-03-20 06:24:42,549 INFO L226 Difference]: Without dead ends: 125 [2022-03-20 06:24:42,549 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 116 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-03-20 06:24:42,549 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 36 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 06:24:42,550 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 299 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 06:24:42,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-03-20 06:24:42,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 113. [2022-03-20 06:24:42,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 71 states have internal predecessors, (82), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (31), 28 states have call predecessors, (31), 31 states have call successors, (31) [2022-03-20 06:24:42,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 146 transitions. [2022-03-20 06:24:42,558 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 146 transitions. Word has length 64 [2022-03-20 06:24:42,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:24:42,559 INFO L478 AbstractCegarLoop]: Abstraction has 113 states and 146 transitions. [2022-03-20 06:24:42,559 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 7 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-20 06:24:42,559 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 146 transitions. [2022-03-20 06:24:42,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-20 06:24:42,560 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:24:42,560 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:24:42,601 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 06:24:42,777 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:24:42,777 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:24:42,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:24:42,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1085940318, now seen corresponding path program 1 times [2022-03-20 06:24:42,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:24:42,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794663906] [2022-03-20 06:24:42,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:24:42,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:24:42,786 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:24:42,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [840404593] [2022-03-20 06:24:42,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:24:42,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:24:42,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:24:42,788 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 06:24:42,792 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 06:24:42,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:24:42,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-20 06:24:42,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:24:43,202 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 66 proven. 11 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-03-20 06:24:43,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:24:43,418 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-03-20 06:24:43,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:24:43,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794663906] [2022-03-20 06:24:43,419 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:24:43,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840404593] [2022-03-20 06:24:43,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840404593] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 06:24:43,419 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 06:24:43,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2022-03-20 06:24:43,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947874739] [2022-03-20 06:24:43,419 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 06:24:43,420 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 06:24:43,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:24:43,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 06:24:43,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-03-20 06:24:43,420 INFO L87 Difference]: Start difference. First operand 113 states and 146 transitions. Second operand has 15 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 5 states have call successors, (19) [2022-03-20 06:24:43,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:24:43,657 INFO L93 Difference]: Finished difference Result 134 states and 165 transitions. [2022-03-20 06:24:43,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 06:24:43,657 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 5 states have call successors, (19) Word has length 75 [2022-03-20 06:24:43,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:24:43,658 INFO L225 Difference]: With dead ends: 134 [2022-03-20 06:24:43,658 INFO L226 Difference]: Without dead ends: 115 [2022-03-20 06:24:43,659 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 133 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-03-20 06:24:43,659 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 39 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 06:24:43,660 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 181 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 06:24:43,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-03-20 06:24:43,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 101. [2022-03-20 06:24:43,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 61 states have (on average 1.1639344262295082) internal successors, (71), 64 states have internal predecessors, (71), 26 states have call successors, (26), 14 states have call predecessors, (26), 13 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-20 06:24:43,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 121 transitions. [2022-03-20 06:24:43,666 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 121 transitions. Word has length 75 [2022-03-20 06:24:43,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:24:43,666 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 121 transitions. [2022-03-20 06:24:43,666 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 5 states have call successors, (19) [2022-03-20 06:24:43,666 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 121 transitions. [2022-03-20 06:24:43,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-03-20 06:24:43,667 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:24:43,667 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:24:43,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 06:24:43,883 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:24:43,883 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:24:43,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:24:43,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1480109990, now seen corresponding path program 1 times [2022-03-20 06:24:43,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:24:43,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274923903] [2022-03-20 06:24:43,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:24:43,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:24:43,891 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:24:43,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [427522470] [2022-03-20 06:24:43,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:24:43,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:24:43,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:24:43,895 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 06:24:43,914 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 06:24:43,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:24:43,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 06:24:43,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:24:44,129 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-03-20 06:24:44,129 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 06:24:44,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:24:44,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274923903] [2022-03-20 06:24:44,130 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:24:44,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427522470] [2022-03-20 06:24:44,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427522470] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 06:24:44,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 06:24:44,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 06:24:44,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465357363] [2022-03-20 06:24:44,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 06:24:44,130 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 06:24:44,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:24:44,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 06:24:44,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-20 06:24:44,131 INFO L87 Difference]: Start difference. First operand 101 states and 121 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-20 06:24:44,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:24:44,163 INFO L93 Difference]: Finished difference Result 103 states and 122 transitions. [2022-03-20 06:24:44,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 06:24:44,163 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 84 [2022-03-20 06:24:44,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:24:44,164 INFO L225 Difference]: With dead ends: 103 [2022-03-20 06:24:44,164 INFO L226 Difference]: Without dead ends: 103 [2022-03-20 06:24:44,164 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-20 06:24:44,165 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 14 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 06:24:44,165 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 86 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 06:24:44,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-20 06:24:44,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-03-20 06:24:44,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 63 states have (on average 1.1428571428571428) internal successors, (72), 64 states have internal predecessors, (72), 26 states have call successors, (26), 14 states have call predecessors, (26), 13 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-20 06:24:44,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 122 transitions. [2022-03-20 06:24:44,170 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 122 transitions. Word has length 84 [2022-03-20 06:24:44,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:24:44,170 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 122 transitions. [2022-03-20 06:24:44,170 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-20 06:24:44,170 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 122 transitions. [2022-03-20 06:24:44,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-03-20 06:24:44,171 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:24:44,171 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:24:44,190 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 06:24:44,388 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:24:44,389 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:24:44,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:24:44,389 INFO L85 PathProgramCache]: Analyzing trace with hash -233495842, now seen corresponding path program 2 times [2022-03-20 06:24:44,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:24:44,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856725138] [2022-03-20 06:24:44,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:24:44,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:24:44,396 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:24:44,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [334708252] [2022-03-20 06:24:44,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 06:24:44,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:24:44,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:24:44,412 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 06:24:44,413 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 06:24:44,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 06:24:44,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 06:24:44,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 06:24:44,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:24:44,997 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-20 06:24:44,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:25:11,893 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 26 proven. 19 refuted. 5 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-20 06:25:11,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:25:11,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856725138] [2022-03-20 06:25:11,894 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:25:11,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334708252] [2022-03-20 06:25:11,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334708252] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 06:25:11,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 06:25:11,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-03-20 06:25:11,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713368276] [2022-03-20 06:25:11,894 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 06:25:11,895 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 06:25:11,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:25:11,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 06:25:11,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=178, Unknown=2, NotChecked=0, Total=240 [2022-03-20 06:25:11,895 INFO L87 Difference]: Start difference. First operand 103 states and 122 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 11 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2022-03-20 06:25:20,277 WARN L232 SmtUtils]: Spent 7.96s on a formula simplification. DAG size of input: 192 DAG size of output: 88 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 06:25:23,241 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 06:25:29,105 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 06:25:29,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:25:29,146 INFO L93 Difference]: Finished difference Result 193 states and 258 transitions. [2022-03-20 06:25:29,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 06:25:29,146 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 11 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) Word has length 94 [2022-03-20 06:25:29,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:25:29,147 INFO L225 Difference]: With dead ends: 193 [2022-03-20 06:25:29,147 INFO L226 Difference]: Without dead ends: 177 [2022-03-20 06:25:29,148 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 170 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=114, Invalid=304, Unknown=2, NotChecked=0, Total=420 [2022-03-20 06:25:29,148 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 90 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 189 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-03-20 06:25:29,148 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 599 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 527 Invalid, 1 Unknown, 0 Unchecked, 7.3s Time] [2022-03-20 06:25:29,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-03-20 06:25:29,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 166. [2022-03-20 06:25:29,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 100 states have (on average 1.21) internal successors, (121), 104 states have internal predecessors, (121), 49 states have call successors, (49), 17 states have call predecessors, (49), 16 states have return successors, (47), 44 states have call predecessors, (47), 47 states have call successors, (47) [2022-03-20 06:25:29,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 217 transitions. [2022-03-20 06:25:29,160 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 217 transitions. Word has length 94 [2022-03-20 06:25:29,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:25:29,160 INFO L478 AbstractCegarLoop]: Abstraction has 166 states and 217 transitions. [2022-03-20 06:25:29,160 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 11 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2022-03-20 06:25:29,160 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 217 transitions. [2022-03-20 06:25:29,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-20 06:25:29,161 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:25:29,161 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:25:29,181 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 06:25:29,362 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:25:29,362 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:25:29,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:25:29,363 INFO L85 PathProgramCache]: Analyzing trace with hash 411415430, now seen corresponding path program 1 times [2022-03-20 06:25:29,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:25:29,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103618342] [2022-03-20 06:25:29,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:25:29,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:25:29,370 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:25:29,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1988270847] [2022-03-20 06:25:29,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:25:29,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:25:29,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:25:29,377 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 06:25:29,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 06:25:29,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:25:29,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 06:25:29,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:25:29,715 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-20 06:25:29,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:25:30,522 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-20 06:25:30,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:25:30,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103618342] [2022-03-20 06:25:30,523 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:25:30,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988270847] [2022-03-20 06:25:30,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988270847] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 06:25:30,523 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 06:25:30,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-03-20 06:25:30,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729197181] [2022-03-20 06:25:30,523 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 06:25:30,524 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 06:25:30,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:25:30,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 06:25:30,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-03-20 06:25:30,524 INFO L87 Difference]: Start difference. First operand 166 states and 217 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 7 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (34), 7 states have call predecessors, (34), 7 states have call successors, (34) [2022-03-20 06:25:30,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:25:30,768 INFO L93 Difference]: Finished difference Result 180 states and 237 transitions. [2022-03-20 06:25:30,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 06:25:30,769 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 7 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (34), 7 states have call predecessors, (34), 7 states have call successors, (34) Word has length 110 [2022-03-20 06:25:30,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:25:30,770 INFO L225 Difference]: With dead ends: 180 [2022-03-20 06:25:30,771 INFO L226 Difference]: Without dead ends: 174 [2022-03-20 06:25:30,771 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 207 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-03-20 06:25:30,771 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 7 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 06:25:30,772 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 391 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 06:25:30,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-03-20 06:25:30,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2022-03-20 06:25:30,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 104 states have (on average 1.2019230769230769) internal successors, (125), 108 states have internal predecessors, (125), 53 states have call successors, (53), 17 states have call predecessors, (53), 16 states have return successors, (51), 48 states have call predecessors, (51), 51 states have call successors, (51) [2022-03-20 06:25:30,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 229 transitions. [2022-03-20 06:25:30,782 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 229 transitions. Word has length 110 [2022-03-20 06:25:30,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:25:30,782 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 229 transitions. [2022-03-20 06:25:30,783 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 7 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (34), 7 states have call predecessors, (34), 7 states have call successors, (34) [2022-03-20 06:25:30,783 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 229 transitions. [2022-03-20 06:25:30,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-03-20 06:25:30,785 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:25:30,785 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:25:30,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 06:25:31,002 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-20 06:25:31,002 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:25:31,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:25:31,003 INFO L85 PathProgramCache]: Analyzing trace with hash 564418017, now seen corresponding path program 2 times [2022-03-20 06:25:31,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:25:31,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675478297] [2022-03-20 06:25:31,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:25:31,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:25:31,012 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:25:31,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [480260398] [2022-03-20 06:25:31,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 06:25:31,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:25:31,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:25:31,027 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 06:25:31,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 06:25:31,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 06:25:31,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 06:25:31,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 06:25:31,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:25:31,344 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 102 proven. 42 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked. [2022-03-20 06:25:31,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:25:31,698 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 63 proven. 15 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-03-20 06:25:31,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:25:31,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675478297] [2022-03-20 06:25:31,699 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:25:31,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480260398] [2022-03-20 06:25:31,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480260398] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 06:25:31,699 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 06:25:31,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-03-20 06:25:31,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132362447] [2022-03-20 06:25:31,700 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 06:25:31,703 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 06:25:31,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:25:31,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 06:25:31,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-20 06:25:31,703 INFO L87 Difference]: Start difference. First operand 174 states and 229 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 9 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 9 states have call predecessors, (36), 9 states have call successors, (36) [2022-03-20 06:25:31,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:25:31,792 INFO L93 Difference]: Finished difference Result 159 states and 200 transitions. [2022-03-20 06:25:31,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 06:25:31,794 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 9 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 9 states have call predecessors, (36), 9 states have call successors, (36) Word has length 123 [2022-03-20 06:25:31,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:25:31,795 INFO L225 Difference]: With dead ends: 159 [2022-03-20 06:25:31,795 INFO L226 Difference]: Without dead ends: 136 [2022-03-20 06:25:31,795 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 235 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-20 06:25:31,796 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 4 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 06:25:31,796 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 204 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 06:25:31,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-03-20 06:25:31,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2022-03-20 06:25:31,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 82 states have (on average 1.1585365853658536) internal successors, (95), 86 states have internal predecessors, (95), 37 states have call successors, (37), 17 states have call predecessors, (37), 16 states have return successors, (35), 32 states have call predecessors, (35), 35 states have call successors, (35) [2022-03-20 06:25:31,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 167 transitions. [2022-03-20 06:25:31,801 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 167 transitions. Word has length 123 [2022-03-20 06:25:31,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:25:31,801 INFO L478 AbstractCegarLoop]: Abstraction has 136 states and 167 transitions. [2022-03-20 06:25:31,801 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 9 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 9 states have call predecessors, (36), 9 states have call successors, (36) [2022-03-20 06:25:31,801 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 167 transitions. [2022-03-20 06:25:31,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-03-20 06:25:31,802 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:25:31,802 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:25:31,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 06:25:32,002 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:25:32,003 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:25:32,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:25:32,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1567600662, now seen corresponding path program 3 times [2022-03-20 06:25:32,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:25:32,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025027135] [2022-03-20 06:25:32,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:25:32,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:25:32,010 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:25:32,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [423274662] [2022-03-20 06:25:32,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 06:25:32,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:25:32,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:25:32,028 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 06:25:32,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 06:25:32,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-20 06:25:32,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 06:25:32,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 06:25:32,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:25:32,417 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 06:25:32,475 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 06:25:32,582 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 06:25:32,681 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-03-20 06:25:32,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:25:41,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:25:41,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025027135] [2022-03-20 06:25:41,424 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:25:41,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423274662] [2022-03-20 06:25:41,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423274662] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 06:25:41,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 06:25:41,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-03-20 06:25:41,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812383539] [2022-03-20 06:25:41,424 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 06:25:41,424 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 06:25:41,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:25:41,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 06:25:41,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-03-20 06:25:41,425 INFO L87 Difference]: Start difference. First operand 136 states and 167 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 06:25:41,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:25:41,525 INFO L93 Difference]: Finished difference Result 140 states and 170 transitions. [2022-03-20 06:25:41,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 06:25:41,525 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 124 [2022-03-20 06:25:41,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:25:41,526 INFO L225 Difference]: With dead ends: 140 [2022-03-20 06:25:41,526 INFO L226 Difference]: Without dead ends: 138 [2022-03-20 06:25:41,526 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 117 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-03-20 06:25:41,529 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 19 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 06:25:41,529 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 120 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 06:25:41,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-03-20 06:25:41,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 118. [2022-03-20 06:25:41,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 73 states have internal predecessors, (81), 29 states have call successors, (29), 17 states have call predecessors, (29), 15 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-20 06:25:41,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 137 transitions. [2022-03-20 06:25:41,538 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 137 transitions. Word has length 124 [2022-03-20 06:25:41,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:25:41,539 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 137 transitions. [2022-03-20 06:25:41,539 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 06:25:41,539 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 137 transitions. [2022-03-20 06:25:41,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-20 06:25:41,540 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:25:41,540 INFO L499 BasicCegarLoop]: trace histogram [20, 19, 19, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:25:41,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 06:25:41,758 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 06:25:41,758 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:25:41,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:25:41,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1333998901, now seen corresponding path program 3 times [2022-03-20 06:25:41,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:25:41,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075271840] [2022-03-20 06:25:41,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:25:41,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:25:41,765 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:25:41,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1979389273] [2022-03-20 06:25:41,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 06:25:41,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:25:41,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:25:41,768 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 06:25:41,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 06:25:41,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-20 06:25:41,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 06:25:41,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 06:25:41,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:25:41,986 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 671 trivial. 0 not checked. [2022-03-20 06:25:41,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:25:42,181 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 671 trivial. 0 not checked. [2022-03-20 06:25:42,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:25:42,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075271840] [2022-03-20 06:25:42,181 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:25:42,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979389273] [2022-03-20 06:25:42,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979389273] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 06:25:42,181 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 06:25:42,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-03-20 06:25:42,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459291933] [2022-03-20 06:25:42,182 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 06:25:42,182 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 06:25:42,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:25:42,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 06:25:42,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-03-20 06:25:42,183 INFO L87 Difference]: Start difference. First operand 118 states and 137 transitions. Second operand has 12 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 4 states have call successors, (16) [2022-03-20 06:25:42,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:25:42,272 INFO L93 Difference]: Finished difference Result 124 states and 141 transitions. [2022-03-20 06:25:42,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 06:25:42,272 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 4 states have call successors, (16) Word has length 127 [2022-03-20 06:25:42,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:25:42,273 INFO L225 Difference]: With dead ends: 124 [2022-03-20 06:25:42,273 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 06:25:42,273 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 243 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-03-20 06:25:42,273 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 16 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 06:25:42,274 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 153 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 06:25:42,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 06:25:42,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 06:25:42,274 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 06:25:42,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 06:25:42,274 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 127 [2022-03-20 06:25:42,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:25:42,274 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 06:25:42,275 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 4 states have call successors, (16) [2022-03-20 06:25:42,275 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 06:25:42,275 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 06:25:42,277 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 06:25:42,294 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-03-20 06:25:42,483 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-20 06:25:42,486 INFO L719 BasicCegarLoop]: Path program histogram: [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:25:42,487 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 06:25:42,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 06:25:42 BasicIcfg [2022-03-20 06:25:42,489 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 06:25:42,489 INFO L158 Benchmark]: Toolchain (without parser) took 66181.03ms. Allocated memory was 169.9MB in the beginning and 313.5MB in the end (delta: 143.7MB). Free memory was 121.0MB in the beginning and 212.2MB in the end (delta: -91.2MB). Peak memory consumption was 53.4MB. Max. memory is 8.0GB. [2022-03-20 06:25:42,489 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 169.9MB. Free memory was 137.8MB in the beginning and 137.7MB in the end (delta: 75.9kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 06:25:42,490 INFO L158 Benchmark]: CACSL2BoogieTranslator took 263.75ms. Allocated memory is still 169.9MB. Free memory was 120.8MB in the beginning and 146.6MB in the end (delta: -25.8MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-20 06:25:42,490 INFO L158 Benchmark]: Boogie Preprocessor took 33.30ms. Allocated memory is still 169.9MB. Free memory was 146.6MB in the beginning and 145.2MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 06:25:42,490 INFO L158 Benchmark]: RCFGBuilder took 285.70ms. Allocated memory is still 169.9MB. Free memory was 145.2MB in the beginning and 134.7MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-20 06:25:42,490 INFO L158 Benchmark]: IcfgTransformer took 36.65ms. Allocated memory is still 169.9MB. Free memory was 134.7MB in the beginning and 133.4MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-20 06:25:42,490 INFO L158 Benchmark]: TraceAbstraction took 65554.75ms. Allocated memory was 169.9MB in the beginning and 313.5MB in the end (delta: 143.7MB). Free memory was 132.8MB in the beginning and 212.2MB in the end (delta: -79.4MB). Peak memory consumption was 65.0MB. Max. memory is 8.0GB. [2022-03-20 06:25:42,491 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 169.9MB. Free memory was 137.8MB in the beginning and 137.7MB in the end (delta: 75.9kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 263.75ms. Allocated memory is still 169.9MB. Free memory was 120.8MB in the beginning and 146.6MB in the end (delta: -25.8MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 33.30ms. Allocated memory is still 169.9MB. Free memory was 146.6MB in the beginning and 145.2MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 285.70ms. Allocated memory is still 169.9MB. Free memory was 145.2MB in the beginning and 134.7MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 36.65ms. Allocated memory is still 169.9MB. Free memory was 134.7MB in the beginning and 133.4MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 65554.75ms. Allocated memory was 169.9MB in the beginning and 313.5MB in the end (delta: 143.7MB). Free memory was 132.8MB in the beginning and 212.2MB in the end (delta: -79.4MB). Peak memory consumption was 65.0MB. 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: 17]: 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 5 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 65.5s, OverallIterations: 14, TraceHistogramMax: 20, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 20.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 410 SdHoareTripleChecker+Valid, 8.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 339 mSDsluCounter, 2533 SdHoareTripleChecker+Invalid, 8.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1965 mSDsCounter, 447 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1808 IncrementalHoareTripleChecker+Invalid, 2256 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 447 mSolverCounterUnsat, 568 mSDtfsCounter, 1808 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1596 GetRequests, 1452 SyntacticMatches, 22 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 21.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=174occurred in iteration=11, InterpolantAutomatonStates: 100, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 75 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 41.3s InterpolantComputationTime, 962 NumberOfCodeBlocks, 840 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 1578 ConstructedInterpolants, 0 QuantifiedInterpolants, 16044 SizeOfPredicates, 26 NumberOfNonLiveVariables, 1954 ConjunctsInSsa, 198 ConjunctsInUnsatCore, 21 InterpolantComputations, 7 PerfectInterpolantSequences, 6338/6540 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 06:25:42,525 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...