/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/hard-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 17:13:11,593 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 17:13:11,600 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 17:13:11,632 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 17:13:11,633 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 17:13:11,633 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 17:13:11,636 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 17:13:11,638 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 17:13:11,639 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 17:13:11,642 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 17:13:11,643 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 17:13:11,643 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 17:13:11,644 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 17:13:11,644 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 17:13:11,645 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 17:13:11,645 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 17:13:11,646 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 17:13:11,646 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 17:13:11,647 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 17:13:11,648 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 17:13:11,649 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 17:13:11,651 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 17:13:11,652 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 17:13:11,653 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 17:13:11,654 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 17:13:11,662 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 17:13:11,668 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 17:13:11,668 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 17:13:11,670 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 17:13:11,671 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-17 17:13:11,678 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 17:13:11,679 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 17:13:11,680 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 17:13:11,680 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-17 17:13:11,680 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 17:13:11,680 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-17 17:13:11,681 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 17:13:11,681 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 17:13:11,681 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 17:13:11,681 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 17:13:11,681 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-17 17:13:11,681 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 17:13:11,681 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 17:13:11,682 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 17:13:11,682 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 17:13:11,682 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 17:13:11,682 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-17 17:13:11,682 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 17:13:11,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 17:13:11,682 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 17:13:11,682 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 17:13:11,683 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 17:13:11,683 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 17:13:11,856 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 17:13:11,872 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 17:13:11,874 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 17:13:11,874 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 17:13:11,876 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 17:13:11,877 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound50.c [2022-03-17 17:13:11,927 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d8dcd4e7/b88b39e18542475db1668a9ed3c5c357/FLAG960aa894b [2022-03-17 17:13:12,285 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 17:13:12,285 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound50.c [2022-03-17 17:13:12,291 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d8dcd4e7/b88b39e18542475db1668a9ed3c5c357/FLAG960aa894b [2022-03-17 17:13:12,300 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d8dcd4e7/b88b39e18542475db1668a9ed3c5c357 [2022-03-17 17:13:12,302 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 17:13:12,303 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 17:13:12,304 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 17:13:12,304 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 17:13:12,306 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 17:13:12,306 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 05:13:12" (1/1) ... [2022-03-17 17:13:12,307 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e3a80fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:13:12, skipping insertion in model container [2022-03-17 17:13:12,307 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 05:13:12" (1/1) ... [2022-03-17 17:13:12,312 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 17:13:12,321 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 17:13:12,451 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound50.c[538,551] [2022-03-17 17:13:12,462 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 17:13:12,466 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 17:13:12,474 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/hard-ll_unwindbound50.c[538,551] [2022-03-17 17:13:12,479 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 17:13:12,487 INFO L208 MainTranslator]: Completed translation [2022-03-17 17:13:12,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:13:12 WrapperNode [2022-03-17 17:13:12,487 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 17:13:12,488 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 17:13:12,488 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 17:13:12,488 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 17:13:12,495 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:13:12" (1/1) ... [2022-03-17 17:13:12,495 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:13:12" (1/1) ... [2022-03-17 17:13:12,499 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:13:12" (1/1) ... [2022-03-17 17:13:12,499 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:13:12" (1/1) ... [2022-03-17 17:13:12,502 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:13:12" (1/1) ... [2022-03-17 17:13:12,504 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:13:12" (1/1) ... [2022-03-17 17:13:12,505 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:13:12" (1/1) ... [2022-03-17 17:13:12,506 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 17:13:12,506 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 17:13:12,506 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 17:13:12,506 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 17:13:12,507 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:13:12" (1/1) ... [2022-03-17 17:13:12,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 17:13:12,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:13:12,528 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) [2022-03-17 17:13:12,539 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 [2022-03-17 17:13:12,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 17:13:12,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 17:13:12,558 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 17:13:12,558 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 17:13:12,558 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 17:13:12,558 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 17:13:12,558 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 17:13:12,558 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 17:13:12,558 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 17:13:12,558 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 17:13:12,558 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-17 17:13:12,558 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 17:13:12,558 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 17:13:12,559 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 17:13:12,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 17:13:12,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 17:13:12,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 17:13:12,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 17:13:12,559 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 17:13:12,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 17:13:12,603 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 17:13:12,604 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 17:13:12,731 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 17:13:12,735 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 17:13:12,735 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-17 17:13:12,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 05:13:12 BoogieIcfgContainer [2022-03-17 17:13:12,736 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 17:13:12,736 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 17:13:12,737 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 17:13:12,737 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 17:13:12,739 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 05:13:12" (1/1) ... [2022-03-17 17:13:12,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 05:13:12 BasicIcfg [2022-03-17 17:13:12,753 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 17:13:12,754 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 17:13:12,754 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 17:13:12,755 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 17:13:12,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 05:13:12" (1/4) ... [2022-03-17 17:13:12,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2556f904 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 05:13:12, skipping insertion in model container [2022-03-17 17:13:12,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:13:12" (2/4) ... [2022-03-17 17:13:12,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2556f904 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 05:13:12, skipping insertion in model container [2022-03-17 17:13:12,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 05:13:12" (3/4) ... [2022-03-17 17:13:12,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2556f904 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 05:13:12, skipping insertion in model container [2022-03-17 17:13:12,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 05:13:12" (4/4) ... [2022-03-17 17:13:12,757 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_unwindbound50.cJordan [2022-03-17 17:13:12,760 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-17 17:13:12,761 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 17:13:12,786 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 17:13:12,790 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 [2022-03-17 17:13:12,790 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 17:13:12,798 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 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) [2022-03-17 17:13:12,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-17 17:13:12,804 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:13:12,804 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:13:12,804 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:13:12,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:13:12,825 INFO L85 PathProgramCache]: Analyzing trace with hash 79654685, now seen corresponding path program 1 times [2022-03-17 17:13:12,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:13:12,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797242611] [2022-03-17 17:13:12,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:13:12,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:13:12,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:13:13,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 17:13:13,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:13:13,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 17:13:13,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:13:13,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 17:13:13,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:13:13,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797242611] [2022-03-17 17:13:13,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797242611] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 17:13:13,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 17:13:13,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 17:13:13,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823262304] [2022-03-17 17:13:13,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 17:13:13,047 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 17:13:13,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:13:13,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 17:13:13,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 17:13:13,085 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 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 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2022-03-17 17:13:13,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:13:13,179 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2022-03-17 17:13:13,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 17:13:13,181 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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 18 [2022-03-17 17:13:13,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:13:13,195 INFO L225 Difference]: With dead ends: 38 [2022-03-17 17:13:13,195 INFO L226 Difference]: Without dead ends: 33 [2022-03-17 17:13:13,197 INFO L911 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 [2022-03-17 17:13:13,201 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 17:13:13,202 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 49 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 17:13:13,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-17 17:13:13,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-03-17 17:13:13,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 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) [2022-03-17 17:13:13,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-03-17 17:13:13,239 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2022-03-17 17:13:13,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:13:13,239 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-03-17 17:13:13,239 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2022-03-17 17:13:13,240 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-03-17 17:13:13,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-17 17:13:13,240 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:13:13,240 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:13:13,241 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 17:13:13,241 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:13:13,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:13:13,242 INFO L85 PathProgramCache]: Analyzing trace with hash -85369733, now seen corresponding path program 1 times [2022-03-17 17:13:13,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:13:13,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501766884] [2022-03-17 17:13:13,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:13:13,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:13:13,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:13:13,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 17:13:13,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:13:13,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 17:13:13,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:13:13,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 17:13:13,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:13:13,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501766884] [2022-03-17 17:13:13,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501766884] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 17:13:13,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 17:13:13,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-17 17:13:13,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793938437] [2022-03-17 17:13:13,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 17:13:13,357 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 17:13:13,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:13:13,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 17:13:13,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-17 17:13:13,358 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-03-17 17:13:13,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:13:13,464 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2022-03-17 17:13:13,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-17 17:13:13,465 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 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 18 [2022-03-17 17:13:13,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:13:13,466 INFO L225 Difference]: With dead ends: 45 [2022-03-17 17:13:13,466 INFO L226 Difference]: Without dead ends: 45 [2022-03-17 17:13:13,466 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-17 17:13:13,467 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 28 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 17:13:13,467 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 96 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 17:13:13,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-17 17:13:13,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2022-03-17 17:13:13,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 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) [2022-03-17 17:13:13,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2022-03-17 17:13:13,474 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2022-03-17 17:13:13,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:13:13,474 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2022-03-17 17:13:13,474 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-03-17 17:13:13,474 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2022-03-17 17:13:13,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-17 17:13:13,475 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:13:13,475 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:13:13,475 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-17 17:13:13,475 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:13:13,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:13:13,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1527809342, now seen corresponding path program 1 times [2022-03-17 17:13:13,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:13:13,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554401498] [2022-03-17 17:13:13,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:13:13,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:13:13,486 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:13:13,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1613265689] [2022-03-17 17:13:13,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:13:13,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:13:13,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:13:13,488 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) [2022-03-17 17:13:13,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 17:13:13,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:13:13,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-17 17:13:13,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:13:13,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 17:13:13,625 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 17:13:13,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:13:13,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554401498] [2022-03-17 17:13:13,626 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:13:13,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613265689] [2022-03-17 17:13:13,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613265689] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 17:13:13,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 17:13:13,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 17:13:13,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497953607] [2022-03-17 17:13:13,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 17:13:13,627 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 17:13:13,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:13:13,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 17:13:13,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 17:13:13,627 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 17:13:13,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:13:13,642 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2022-03-17 17:13:13,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 17:13:13,644 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-03-17 17:13:13,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:13:13,645 INFO L225 Difference]: With dead ends: 38 [2022-03-17 17:13:13,645 INFO L226 Difference]: Without dead ends: 38 [2022-03-17 17:13:13,645 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 17:13:13,646 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 17:13:13,646 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 107 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 17:13:13,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-17 17:13:13,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-03-17 17:13:13,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 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) [2022-03-17 17:13:13,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2022-03-17 17:13:13,654 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2022-03-17 17:13:13,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:13:13,654 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2022-03-17 17:13:13,655 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 17:13:13,655 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2022-03-17 17:13:13,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-17 17:13:13,656 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:13:13,657 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:13:13,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-17 17:13:13,875 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:13:13,875 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:13:13,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:13:13,876 INFO L85 PathProgramCache]: Analyzing trace with hash 2128444854, now seen corresponding path program 1 times [2022-03-17 17:13:13,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:13:13,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883425859] [2022-03-17 17:13:13,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:13:13,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:13:13,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:13:13,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 17:13:13,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:13:13,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 17:13:13,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:13:13,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-03-17 17:13:13,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:13:13,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 17:13:13,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:13:13,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883425859] [2022-03-17 17:13:13,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883425859] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 17:13:13,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 17:13:13,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-17 17:13:13,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251073127] [2022-03-17 17:13:13,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 17:13:13,974 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 17:13:13,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:13:13,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 17:13:13,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-17 17:13:13,975 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 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) [2022-03-17 17:13:14,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:13:14,116 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2022-03-17 17:13:14,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-17 17:13:14,117 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 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 23 [2022-03-17 17:13:14,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:13:14,118 INFO L225 Difference]: With dead ends: 50 [2022-03-17 17:13:14,118 INFO L226 Difference]: Without dead ends: 50 [2022-03-17 17:13:14,118 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-17 17:13:14,119 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 23 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 17:13:14,119 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 89 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 17:13:14,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-17 17:13:14,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2022-03-17 17:13:14,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 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) [2022-03-17 17:13:14,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2022-03-17 17:13:14,123 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2022-03-17 17:13:14,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:13:14,124 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2022-03-17 17:13:14,124 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 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) [2022-03-17 17:13:14,124 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2022-03-17 17:13:14,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-17 17:13:14,124 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:13:14,124 INFO L500 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, 1] [2022-03-17 17:13:14,124 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-17 17:13:14,125 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:13:14,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:13:14,125 INFO L85 PathProgramCache]: Analyzing trace with hash 135546551, now seen corresponding path program 1 times [2022-03-17 17:13:14,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:13:14,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585368506] [2022-03-17 17:13:14,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:13:14,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:13:14,144 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:13:14,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [515149401] [2022-03-17 17:13:14,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:13:14,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:13:14,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:13:14,146 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) [2022-03-17 17:13:14,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 17:13:14,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:13:14,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 17:13:14,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:13:14,243 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 17:13:14,243 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 17:13:14,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:13:14,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585368506] [2022-03-17 17:13:14,244 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:13:14,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515149401] [2022-03-17 17:13:14,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515149401] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 17:13:14,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 17:13:14,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 17:13:14,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301583124] [2022-03-17 17:13:14,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 17:13:14,245 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 17:13:14,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:13:14,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 17:13:14,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 17:13:14,245 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-17 17:13:14,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:13:14,280 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2022-03-17 17:13:14,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 17:13:14,280 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-03-17 17:13:14,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:13:14,281 INFO L225 Difference]: With dead ends: 57 [2022-03-17 17:13:14,281 INFO L226 Difference]: Without dead ends: 56 [2022-03-17 17:13:14,281 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-17 17:13:14,282 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 10 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 154 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 [2022-03-17 17:13:14,283 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 154 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 17:13:14,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-17 17:13:14,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-03-17 17:13:14,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 35 states have internal predecessors, (41), 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) [2022-03-17 17:13:14,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2022-03-17 17:13:14,287 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 28 [2022-03-17 17:13:14,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:13:14,288 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2022-03-17 17:13:14,288 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-17 17:13:14,288 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2022-03-17 17:13:14,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-17 17:13:14,289 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:13:14,289 INFO L500 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, 1, 1] [2022-03-17 17:13:14,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 17:13:14,509 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 [2022-03-17 17:13:14,510 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:13:14,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:13:14,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1016025214, now seen corresponding path program 1 times [2022-03-17 17:13:14,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:13:14,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882059621] [2022-03-17 17:13:14,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:13:14,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:13:14,521 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:13:14,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [26175738] [2022-03-17 17:13:14,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:13:14,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:13:14,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:13:14,522 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) [2022-03-17 17:13:14,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 17:13:14,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:13:14,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 17:13:14,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:13:14,625 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 17:13:14,626 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 17:13:14,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:13:14,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882059621] [2022-03-17 17:13:14,626 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:13:14,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26175738] [2022-03-17 17:13:14,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26175738] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 17:13:14,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 17:13:14,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 17:13:14,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053202116] [2022-03-17 17:13:14,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 17:13:14,627 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 17:13:14,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:13:14,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 17:13:14,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-17 17:13:14,628 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-17 17:13:14,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:13:14,668 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2022-03-17 17:13:14,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 17:13:14,669 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2022-03-17 17:13:14,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:13:14,672 INFO L225 Difference]: With dead ends: 69 [2022-03-17 17:13:14,672 INFO L226 Difference]: Without dead ends: 69 [2022-03-17 17:13:14,673 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-17 17:13:14,673 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 17:13:14,673 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 117 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 17:13:14,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-17 17:13:14,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2022-03-17 17:13:14,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 44 states have internal predecessors, (49), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-17 17:13:14,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2022-03-17 17:13:14,678 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 36 [2022-03-17 17:13:14,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:13:14,679 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2022-03-17 17:13:14,679 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-17 17:13:14,679 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2022-03-17 17:13:14,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-17 17:13:14,680 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:13:14,680 INFO L500 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, 1, 1] [2022-03-17 17:13:14,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-17 17:13:14,880 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 [2022-03-17 17:13:14,881 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:13:14,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:13:14,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1017127481, now seen corresponding path program 1 times [2022-03-17 17:13:14,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:13:14,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217652987] [2022-03-17 17:13:14,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:13:14,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:13:14,889 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:13:14,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1129126955] [2022-03-17 17:13:14,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:13:14,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:13:14,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:13:14,895 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) [2022-03-17 17:13:14,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-17 17:13:14,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:13:14,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-17 17:13:14,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:13:15,180 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 17:13:15,180 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 17:13:15,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:13:15,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217652987] [2022-03-17 17:13:15,181 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:13:15,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129126955] [2022-03-17 17:13:15,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129126955] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 17:13:15,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 17:13:15,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-17 17:13:15,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733280887] [2022-03-17 17:13:15,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 17:13:15,183 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 17:13:15,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:13:15,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 17:13:15,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-17 17:13:15,184 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 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) [2022-03-17 17:13:15,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:13:15,243 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2022-03-17 17:13:15,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 17:13:15,244 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 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 36 [2022-03-17 17:13:15,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:13:15,245 INFO L225 Difference]: With dead ends: 72 [2022-03-17 17:13:15,245 INFO L226 Difference]: Without dead ends: 58 [2022-03-17 17:13:15,245 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-17 17:13:15,246 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 10 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 17:13:15,246 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 184 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 17:13:15,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-03-17 17:13:15,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-03-17 17:13:15,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 37 states have internal predecessors, (42), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-17 17:13:15,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2022-03-17 17:13:15,250 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 36 [2022-03-17 17:13:15,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:13:15,250 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2022-03-17 17:13:15,251 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 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) [2022-03-17 17:13:15,251 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2022-03-17 17:13:15,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-17 17:13:15,251 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:13:15,251 INFO L500 BasicCegarLoop]: trace histogram [4, 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, 1, 1] [2022-03-17 17:13:15,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-17 17:13:15,467 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 [2022-03-17 17:13:15,467 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:13:15,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:13:15,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1880362404, now seen corresponding path program 1 times [2022-03-17 17:13:15,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:13:15,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821777511] [2022-03-17 17:13:15,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:13:15,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:13:15,477 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:13:15,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [616056092] [2022-03-17 17:13:15,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:13:15,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:13:15,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:13:15,479 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) [2022-03-17 17:13:15,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-17 17:13:15,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:13:15,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 17:13:15,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:13:15,573 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 17:13:15,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:13:15,664 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 17:13:15,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:13:15,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821777511] [2022-03-17 17:13:15,665 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:13:15,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616056092] [2022-03-17 17:13:15,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616056092] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 17:13:15,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 17:13:15,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-17 17:13:15,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233379480] [2022-03-17 17:13:15,665 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 17:13:15,665 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-17 17:13:15,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:13:15,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-17 17:13:15,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-17 17:13:15,666 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-03-17 17:13:15,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:13:15,731 INFO L93 Difference]: Finished difference Result 109 states and 125 transitions. [2022-03-17 17:13:15,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-17 17:13:15,731 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 38 [2022-03-17 17:13:15,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:13:15,732 INFO L225 Difference]: With dead ends: 109 [2022-03-17 17:13:15,732 INFO L226 Difference]: Without dead ends: 109 [2022-03-17 17:13:15,732 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-17 17:13:15,733 INFO L912 BasicCegarLoop]: 51 mSDtfsCounter, 60 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 17:13:15,733 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 218 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 17:13:15,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-03-17 17:13:15,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 103. [2022-03-17 17:13:15,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 65 states have (on average 1.1846153846153846) internal successors, (77), 67 states have internal predecessors, (77), 23 states have call successors, (23), 15 states have call predecessors, (23), 14 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-03-17 17:13:15,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2022-03-17 17:13:15,746 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 38 [2022-03-17 17:13:15,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:13:15,746 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2022-03-17 17:13:15,746 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-03-17 17:13:15,746 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2022-03-17 17:13:15,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-17 17:13:15,747 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:13:15,747 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:13:15,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-17 17:13:15,987 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 [2022-03-17 17:13:15,987 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:13:15,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:13:15,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1525733273, now seen corresponding path program 1 times [2022-03-17 17:13:15,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:13:15,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685688861] [2022-03-17 17:13:15,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:13:15,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:13:15,996 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:13:15,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1137834192] [2022-03-17 17:13:15,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:13:15,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:13:15,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:13:15,997 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) [2022-03-17 17:13:15,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-17 17:13:16,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:13:16,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-17 17:13:16,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:13:16,201 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-17 17:13:16,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:13:16,302 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-17 17:13:16,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:13:16,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685688861] [2022-03-17 17:13:16,302 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:13:16,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137834192] [2022-03-17 17:13:16,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137834192] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 17:13:16,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 17:13:16,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-03-17 17:13:16,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990451015] [2022-03-17 17:13:16,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 17:13:16,303 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 17:13:16,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:13:16,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 17:13:16,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-17 17:13:16,304 INFO L87 Difference]: Start difference. First operand 103 states and 120 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) [2022-03-17 17:13:16,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:13:16,334 INFO L93 Difference]: Finished difference Result 118 states and 137 transitions. [2022-03-17 17:13:16,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 17:13:16,334 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 46 [2022-03-17 17:13:16,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:13:16,337 INFO L225 Difference]: With dead ends: 118 [2022-03-17 17:13:16,337 INFO L226 Difference]: Without dead ends: 118 [2022-03-17 17:13:16,338 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-17 17:13:16,340 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 11 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 136 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 [2022-03-17 17:13:16,341 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 136 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 17:13:16,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-03-17 17:13:16,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 115. [2022-03-17 17:13:16,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 73 states have (on average 1.1643835616438356) internal successors, (85), 76 states have internal predecessors, (85), 25 states have call successors, (25), 17 states have call predecessors, (25), 16 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2022-03-17 17:13:16,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 132 transitions. [2022-03-17 17:13:16,368 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 132 transitions. Word has length 46 [2022-03-17 17:13:16,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:13:16,368 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 132 transitions. [2022-03-17 17:13:16,368 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) [2022-03-17 17:13:16,368 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 132 transitions. [2022-03-17 17:13:16,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-17 17:13:16,371 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:13:16,371 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:13:16,394 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-17 17:13:16,591 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 [2022-03-17 17:13:16,592 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:13:16,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:13:16,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1447419744, now seen corresponding path program 1 times [2022-03-17 17:13:16,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:13:16,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857786707] [2022-03-17 17:13:16,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:13:16,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:13:16,599 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:13:16,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [789399951] [2022-03-17 17:13:16,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:13:16,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:13:16,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:13:16,615 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) [2022-03-17 17:13:16,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-17 17:13:16,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:13:16,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-17 17:13:16,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:13:16,778 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 17:13:16,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:13:16,876 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-17 17:13:16,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:13:16,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857786707] [2022-03-17 17:13:16,876 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:13:16,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789399951] [2022-03-17 17:13:16,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789399951] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 17:13:16,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 17:13:16,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-17 17:13:16,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890051322] [2022-03-17 17:13:16,877 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 17:13:16,877 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-17 17:13:16,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:13:16,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-17 17:13:16,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-17 17:13:16,878 INFO L87 Difference]: Start difference. First operand 115 states and 132 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 8 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-17 17:13:17,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:13:17,000 INFO L93 Difference]: Finished difference Result 193 states and 224 transitions. [2022-03-17 17:13:17,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-17 17:13:17,000 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 8 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) Word has length 54 [2022-03-17 17:13:17,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:13:17,002 INFO L225 Difference]: With dead ends: 193 [2022-03-17 17:13:17,002 INFO L226 Difference]: Without dead ends: 193 [2022-03-17 17:13:17,003 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-03-17 17:13:17,003 INFO L912 BasicCegarLoop]: 63 mSDtfsCounter, 107 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 17:13:17,003 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 222 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 17:13:17,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-03-17 17:13:17,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 186. [2022-03-17 17:13:17,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 118 states have (on average 1.1779661016949152) internal successors, (139), 125 states have internal predecessors, (139), 43 states have call successors, (43), 25 states have call predecessors, (43), 24 states have return successors, (38), 35 states have call predecessors, (38), 38 states have call successors, (38) [2022-03-17 17:13:17,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 220 transitions. [2022-03-17 17:13:17,011 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 220 transitions. Word has length 54 [2022-03-17 17:13:17,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:13:17,012 INFO L478 AbstractCegarLoop]: Abstraction has 186 states and 220 transitions. [2022-03-17 17:13:17,012 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 8 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-17 17:13:17,012 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 220 transitions. [2022-03-17 17:13:17,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-17 17:13:17,012 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:13:17,013 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:13:17,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-17 17:13:17,231 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 [2022-03-17 17:13:17,232 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:13:17,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:13:17,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1448522011, now seen corresponding path program 1 times [2022-03-17 17:13:17,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:13:17,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035062036] [2022-03-17 17:13:17,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:13:17,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:13:17,240 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:13:17,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [318740709] [2022-03-17 17:13:17,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:13:17,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:13:17,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:13:17,241 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) [2022-03-17 17:13:17,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-17 17:13:17,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:13:17,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-17 17:13:17,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:13:17,608 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-17 17:13:17,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:13:17,778 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-17 17:13:17,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:13:17,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035062036] [2022-03-17 17:13:17,778 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:13:17,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318740709] [2022-03-17 17:13:17,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318740709] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 17:13:17,778 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 17:13:17,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-03-17 17:13:17,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315721028] [2022-03-17 17:13:17,779 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 17:13:17,779 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-17 17:13:17,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:13:17,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-17 17:13:17,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-17 17:13:17,780 INFO L87 Difference]: Start difference. First operand 186 states and 220 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, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-17 17:13:17,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:13:17,962 INFO L93 Difference]: Finished difference Result 266 states and 335 transitions. [2022-03-17 17:13:17,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-17 17:13:17,963 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, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 54 [2022-03-17 17:13:17,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:13:17,964 INFO L225 Difference]: With dead ends: 266 [2022-03-17 17:13:17,964 INFO L226 Difference]: Without dead ends: 264 [2022-03-17 17:13:17,964 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-03-17 17:13:17,965 INFO L912 BasicCegarLoop]: 59 mSDtfsCounter, 46 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 17:13:17,965 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 326 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 17:13:17,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-03-17 17:13:17,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 239. [2022-03-17 17:13:17,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 155 states have (on average 1.2193548387096773) internal successors, (189), 163 states have internal predecessors, (189), 56 states have call successors, (56), 29 states have call predecessors, (56), 27 states have return successors, (51), 46 states have call predecessors, (51), 51 states have call successors, (51) [2022-03-17 17:13:17,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 296 transitions. [2022-03-17 17:13:17,974 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 296 transitions. Word has length 54 [2022-03-17 17:13:17,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:13:17,974 INFO L478 AbstractCegarLoop]: Abstraction has 239 states and 296 transitions. [2022-03-17 17:13:17,974 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, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-17 17:13:17,975 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 296 transitions. [2022-03-17 17:13:17,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-17 17:13:17,975 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:13:17,975 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:13:17,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-17 17:13:18,196 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 [2022-03-17 17:13:18,196 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:13:18,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:13:18,196 INFO L85 PathProgramCache]: Analyzing trace with hash 113245770, now seen corresponding path program 1 times [2022-03-17 17:13:18,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:13:18,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825074709] [2022-03-17 17:13:18,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:13:18,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:13:18,204 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:13:18,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [86863808] [2022-03-17 17:13:18,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:13:18,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:13:18,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:13:18,206 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) [2022-03-17 17:13:18,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-17 17:13:18,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:13:18,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-17 17:13:18,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:13:18,956 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 36 proven. 10 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-03-17 17:13:18,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:13:42,543 WARN L232 SmtUtils]: Spent 12.46s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 17:14:51,030 WARN L232 SmtUtils]: Spent 16.00s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 17:16:10,773 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 36 proven. 10 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-03-17 17:16:10,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:16:10,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825074709] [2022-03-17 17:16:10,774 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:16:10,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86863808] [2022-03-17 17:16:10,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86863808] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 17:16:10,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 17:16:10,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-03-17 17:16:10,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15752422] [2022-03-17 17:16:10,775 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 17:16:10,775 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-17 17:16:10,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:16:10,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-17 17:16:10,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-03-17 17:16:10,776 INFO L87 Difference]: Start difference. First operand 239 states and 296 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 16 states have internal predecessors, (43), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-17 17:16:18,820 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 [] [2022-03-17 17:16:38,210 WARN L232 SmtUtils]: Spent 16.98s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 17:16:45,354 WARN L232 SmtUtils]: Spent 6.51s on a formula simplification. DAG size of input: 58 DAG size of output: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 17:16:52,447 WARN L232 SmtUtils]: Spent 5.73s on a formula simplification. DAG size of input: 63 DAG size of output: 29 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 17:16:54,640 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 [] [2022-03-17 17:16:57,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:16:57,304 INFO L93 Difference]: Finished difference Result 293 states and 367 transitions. [2022-03-17 17:16:57,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-17 17:16:57,305 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 16 states have internal predecessors, (43), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) Word has length 68 [2022-03-17 17:16:57,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:16:57,306 INFO L225 Difference]: With dead ends: 293 [2022-03-17 17:16:57,306 INFO L226 Difference]: Without dead ends: 293 [2022-03-17 17:16:57,307 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 65.4s TimeCoverageRelationStatistics Valid=162, Invalid=649, Unknown=1, NotChecked=0, Total=812 [2022-03-17 17:16:57,307 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 83 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 132 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2022-03-17 17:16:57,307 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 411 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 523 Invalid, 2 Unknown, 0 Unchecked, 11.0s Time] [2022-03-17 17:16:57,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-03-17 17:16:57,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 252. [2022-03-17 17:16:57,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 168 states have (on average 1.1904761904761905) internal successors, (200), 176 states have internal predecessors, (200), 53 states have call successors, (53), 31 states have call predecessors, (53), 30 states have return successors, (49), 44 states have call predecessors, (49), 49 states have call successors, (49) [2022-03-17 17:16:57,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 302 transitions. [2022-03-17 17:16:57,339 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 302 transitions. Word has length 68 [2022-03-17 17:16:57,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:16:57,339 INFO L478 AbstractCegarLoop]: Abstraction has 252 states and 302 transitions. [2022-03-17 17:16:57,339 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 16 states have internal predecessors, (43), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-17 17:16:57,339 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 302 transitions. [2022-03-17 17:16:57,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-17 17:16:57,340 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:16:57,340 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:16:57,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-17 17:16:57,554 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 [2022-03-17 17:16:57,554 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:16:57,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:16:57,555 INFO L85 PathProgramCache]: Analyzing trace with hash -742748636, now seen corresponding path program 1 times [2022-03-17 17:16:57,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:16:57,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907351935] [2022-03-17 17:16:57,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:16:57,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:16:57,561 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:16:57,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1261789011] [2022-03-17 17:16:57,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:16:57,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:16:57,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:16:57,563 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) [2022-03-17 17:16:57,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-17 17:16:57,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:16:57,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-17 17:16:57,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:16:58,040 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 25 proven. 33 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-03-17 17:16:58,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:17:00,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:17:00,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907351935] [2022-03-17 17:17:00,125 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:17:00,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261789011] [2022-03-17 17:17:00,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261789011] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 17:17:00,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 17:17:00,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-03-17 17:17:00,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281949954] [2022-03-17 17:17:00,126 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 17:17:00,126 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-17 17:17:00,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:17:00,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-17 17:17:00,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-03-17 17:17:00,127 INFO L87 Difference]: Start difference. First operand 252 states and 302 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-17 17:17:00,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:17:00,896 INFO L93 Difference]: Finished difference Result 289 states and 350 transitions. [2022-03-17 17:17:00,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-17 17:17:00,897 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 79 [2022-03-17 17:17:00,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:17:00,898 INFO L225 Difference]: With dead ends: 289 [2022-03-17 17:17:00,898 INFO L226 Difference]: Without dead ends: 287 [2022-03-17 17:17:00,898 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2022-03-17 17:17:00,899 INFO L912 BasicCegarLoop]: 53 mSDtfsCounter, 30 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-17 17:17:00,899 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 528 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-17 17:17:00,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-03-17 17:17:00,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 268. [2022-03-17 17:17:00,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 178 states have (on average 1.1797752808988764) internal successors, (210), 186 states have internal predecessors, (210), 57 states have call successors, (57), 34 states have call predecessors, (57), 32 states have return successors, (53), 47 states have call predecessors, (53), 53 states have call successors, (53) [2022-03-17 17:17:00,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 320 transitions. [2022-03-17 17:17:00,913 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 320 transitions. Word has length 79 [2022-03-17 17:17:00,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:17:00,914 INFO L478 AbstractCegarLoop]: Abstraction has 268 states and 320 transitions. [2022-03-17 17:17:00,914 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-17 17:17:00,914 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 320 transitions. [2022-03-17 17:17:00,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-03-17 17:17:00,914 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:17:00,915 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:17:00,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-17 17:17:01,115 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 [2022-03-17 17:17:01,115 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:17:01,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:17:01,116 INFO L85 PathProgramCache]: Analyzing trace with hash -911798983, now seen corresponding path program 2 times [2022-03-17 17:17:01,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:17:01,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411683483] [2022-03-17 17:17:01,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:17:01,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:17:01,127 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:17:01,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1184431579] [2022-03-17 17:17:01,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 17:17:01,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:17:01,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:17:01,137 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) [2022-03-17 17:17:01,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-17 17:17:01,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 17:17:01,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 17:17:01,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 17:17:01,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:17:01,297 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-03-17 17:17:01,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:17:01,442 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-03-17 17:17:01,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:17:01,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411683483] [2022-03-17 17:17:01,442 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:17:01,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184431579] [2022-03-17 17:17:01,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184431579] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 17:17:01,442 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 17:17:01,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2022-03-17 17:17:01,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357430053] [2022-03-17 17:17:01,443 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 17:17:01,443 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 17:17:01,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:17:01,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 17:17:01,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-17 17:17:01,444 INFO L87 Difference]: Start difference. First operand 268 states and 320 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-03-17 17:17:01,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:17:01,517 INFO L93 Difference]: Finished difference Result 261 states and 308 transitions. [2022-03-17 17:17:01,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 17:17:01,517 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 82 [2022-03-17 17:17:01,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:17:01,518 INFO L225 Difference]: With dead ends: 261 [2022-03-17 17:17:01,518 INFO L226 Difference]: Without dead ends: 259 [2022-03-17 17:17:01,518 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-17 17:17:01,518 INFO L912 BasicCegarLoop]: 59 mSDtfsCounter, 0 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 17:17:01,519 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 182 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 17:17:01,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-03-17 17:17:01,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 248. [2022-03-17 17:17:01,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 166 states have (on average 1.1686746987951808) internal successors, (194), 171 states have internal predecessors, (194), 51 states have call successors, (51), 32 states have call predecessors, (51), 30 states have return successors, (48), 44 states have call predecessors, (48), 48 states have call successors, (48) [2022-03-17 17:17:01,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 293 transitions. [2022-03-17 17:17:01,524 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 293 transitions. Word has length 82 [2022-03-17 17:17:01,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:17:01,524 INFO L478 AbstractCegarLoop]: Abstraction has 248 states and 293 transitions. [2022-03-17 17:17:01,524 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-03-17 17:17:01,524 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 293 transitions. [2022-03-17 17:17:01,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-03-17 17:17:01,525 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:17:01,525 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:17:01,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-17 17:17:01,735 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 [2022-03-17 17:17:01,735 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:17:01,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:17:01,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1053492757, now seen corresponding path program 1 times [2022-03-17 17:17:01,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:17:01,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615219290] [2022-03-17 17:17:01,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:17:01,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:17:01,742 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:17:01,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [868763215] [2022-03-17 17:17:01,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:17:01,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:17:01,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:17:01,748 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 17:17:01,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-17 17:17:01,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:17:01,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-17 17:17:01,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:17:02,011 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-17 17:17:02,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:17:02,322 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-17 17:17:02,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:17:02,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615219290] [2022-03-17 17:17:02,322 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:17:02,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868763215] [2022-03-17 17:17:02,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868763215] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 17:17:02,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 17:17:02,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-03-17 17:17:02,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047203587] [2022-03-17 17:17:02,323 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 17:17:02,323 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-17 17:17:02,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:17:02,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-17 17:17:02,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-17 17:17:02,324 INFO L87 Difference]: Start difference. First operand 248 states and 293 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 8 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-03-17 17:17:02,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:17:02,571 INFO L93 Difference]: Finished difference Result 252 states and 297 transitions. [2022-03-17 17:17:02,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-17 17:17:02,571 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 8 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 84 [2022-03-17 17:17:02,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:17:02,572 INFO L225 Difference]: With dead ends: 252 [2022-03-17 17:17:02,572 INFO L226 Difference]: Without dead ends: 229 [2022-03-17 17:17:02,573 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-17 17:17:02,573 INFO L912 BasicCegarLoop]: 61 mSDtfsCounter, 9 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 17:17:02,573 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 340 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 17:17:02,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-03-17 17:17:02,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2022-03-17 17:17:02,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 153 states have (on average 1.1764705882352942) internal successors, (180), 158 states have internal predecessors, (180), 47 states have call successors, (47), 30 states have call predecessors, (47), 28 states have return successors, (44), 40 states have call predecessors, (44), 44 states have call successors, (44) [2022-03-17 17:17:02,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 271 transitions. [2022-03-17 17:17:02,578 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 271 transitions. Word has length 84 [2022-03-17 17:17:02,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:17:02,578 INFO L478 AbstractCegarLoop]: Abstraction has 229 states and 271 transitions. [2022-03-17 17:17:02,578 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 8 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-03-17 17:17:02,578 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 271 transitions. [2022-03-17 17:17:02,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-03-17 17:17:02,579 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:17:02,579 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 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, 1, 1, 1, 1, 1, 1] [2022-03-17 17:17:02,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-17 17:17:02,795 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-17 17:17:02,795 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:17:02,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:17:02,796 INFO L85 PathProgramCache]: Analyzing trace with hash -883405496, now seen corresponding path program 1 times [2022-03-17 17:17:02,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:17:02,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866800571] [2022-03-17 17:17:02,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:17:02,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:17:02,802 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:17:02,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1172118450] [2022-03-17 17:17:02,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:17:02,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:17:02,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:17:02,804 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 17:17:02,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-17 17:17:02,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:17:02,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-17 17:17:02,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:17:03,011 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-03-17 17:17:03,011 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 17:17:03,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:17:03,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866800571] [2022-03-17 17:17:03,012 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:17:03,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172118450] [2022-03-17 17:17:03,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172118450] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 17:17:03,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 17:17:03,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 17:17:03,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10541982] [2022-03-17 17:17:03,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 17:17:03,012 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 17:17:03,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:17:03,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 17:17:03,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-17 17:17:03,013 INFO L87 Difference]: Start difference. First operand 229 states and 271 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 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) [2022-03-17 17:17:03,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:17:03,051 INFO L93 Difference]: Finished difference Result 228 states and 267 transitions. [2022-03-17 17:17:03,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 17:17:03,051 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 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 88 [2022-03-17 17:17:03,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:17:03,052 INFO L225 Difference]: With dead ends: 228 [2022-03-17 17:17:03,052 INFO L226 Difference]: Without dead ends: 228 [2022-03-17 17:17:03,052 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-17 17:17:03,053 INFO L912 BasicCegarLoop]: 63 mSDtfsCounter, 17 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 17:17:03,053 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 135 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 17:17:03,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-03-17 17:17:03,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 218. [2022-03-17 17:17:03,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 147 states have (on average 1.1360544217687074) internal successors, (167), 150 states have internal predecessors, (167), 43 states have call successors, (43), 28 states have call predecessors, (43), 27 states have return successors, (41), 39 states have call predecessors, (41), 41 states have call successors, (41) [2022-03-17 17:17:03,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 251 transitions. [2022-03-17 17:17:03,058 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 251 transitions. Word has length 88 [2022-03-17 17:17:03,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:17:03,060 INFO L478 AbstractCegarLoop]: Abstraction has 218 states and 251 transitions. [2022-03-17 17:17:03,060 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 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) [2022-03-17 17:17:03,060 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 251 transitions. [2022-03-17 17:17:03,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-03-17 17:17:03,061 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:17:03,061 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 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] [2022-03-17 17:17:03,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-17 17:17:03,277 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-17 17:17:03,277 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:17:03,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:17:03,277 INFO L85 PathProgramCache]: Analyzing trace with hash -873799525, now seen corresponding path program 3 times [2022-03-17 17:17:03,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:17:03,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419382469] [2022-03-17 17:17:03,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:17:03,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:17:03,283 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:17:03,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [796506349] [2022-03-17 17:17:03,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 17:17:03,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:17:03,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:17:03,300 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 17:17:03,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-17 17:17:03,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-17 17:17:03,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 17:17:03,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 54 conjunts are in the unsatisfiable core [2022-03-17 17:17:03,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:17:04,149 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 69 proven. 53 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-03-17 17:17:04,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:17:52,324 WARN L232 SmtUtils]: Spent 5.47s on a formula simplification. DAG size of input: 54 DAG size of output: 28 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 17:20:41,397 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 81 proven. 41 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-03-17 17:20:41,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:20:41,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419382469] [2022-03-17 17:20:41,397 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:20:41,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796506349] [2022-03-17 17:20:41,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796506349] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 17:20:41,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 17:20:41,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 23 [2022-03-17 17:20:41,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689073132] [2022-03-17 17:20:41,397 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 17:20:41,398 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-17 17:20:41,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:20:41,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-17 17:20:41,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=422, Unknown=1, NotChecked=0, Total=506 [2022-03-17 17:20:41,398 INFO L87 Difference]: Start difference. First operand 218 states and 251 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 20 states have internal predecessors, (60), 11 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 10 states have call predecessors, (29), 9 states have call successors, (29) [2022-03-17 17:21:13,017 WARN L232 SmtUtils]: Spent 29.92s on a formula simplification. DAG size of input: 180 DAG size of output: 49 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 17:21:16,991 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 [] [2022-03-17 17:21:30,048 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 17:21:50,029 WARN L232 SmtUtils]: Spent 17.29s on a formula simplification. DAG size of input: 143 DAG size of output: 46 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 17:22:03,336 WARN L232 SmtUtils]: Spent 8.73s on a formula simplification. DAG size of input: 67 DAG size of output: 37 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 17:22:11,585 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 17:23:24,887 WARN L232 SmtUtils]: Spent 1.11m on a formula simplification. DAG size of input: 167 DAG size of output: 100 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 17:24:04,771 WARN L232 SmtUtils]: Spent 32.70s on a formula simplification. DAG size of input: 187 DAG size of output: 52 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 17:24:20,988 WARN L232 SmtUtils]: Spent 10.45s on a formula simplification. DAG size of input: 136 DAG size of output: 39 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 17:24:23,534 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 17:24:49,180 WARN L232 SmtUtils]: Spent 19.62s on a formula simplification. DAG size of input: 138 DAG size of output: 88 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 17:24:49,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:24:49,525 INFO L93 Difference]: Finished difference Result 290 states and 371 transitions. [2022-03-17 17:24:49,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-17 17:24:49,525 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 20 states have internal predecessors, (60), 11 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 10 states have call predecessors, (29), 9 states have call successors, (29) Word has length 100 [2022-03-17 17:24:49,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:24:49,526 INFO L225 Difference]: With dead ends: 290 [2022-03-17 17:24:49,526 INFO L226 Difference]: Without dead ends: 283 [2022-03-17 17:24:49,527 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 174 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 230.5s TimeCoverageRelationStatistics Valid=274, Invalid=1284, Unknown=2, NotChecked=0, Total=1560 [2022-03-17 17:24:49,527 INFO L912 BasicCegarLoop]: 63 mSDtfsCounter, 173 mSDsluCounter, 746 mSDsCounter, 0 mSdLazyCounter, 1067 mSolverCounterSat, 256 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 1325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 1067 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.2s IncrementalHoareTripleChecker+Time [2022-03-17 17:24:49,527 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 809 Invalid, 1325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 1067 Invalid, 2 Unknown, 0 Unchecked, 32.2s Time] [2022-03-17 17:24:49,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-03-17 17:24:49,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 245. [2022-03-17 17:24:49,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 163 states have (on average 1.177914110429448) internal successors, (192), 170 states have internal predecessors, (192), 53 states have call successors, (53), 29 states have call predecessors, (53), 28 states have return successors, (51), 45 states have call predecessors, (51), 51 states have call successors, (51) [2022-03-17 17:24:49,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 296 transitions. [2022-03-17 17:24:49,533 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 296 transitions. Word has length 100 [2022-03-17 17:24:49,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:24:49,533 INFO L478 AbstractCegarLoop]: Abstraction has 245 states and 296 transitions. [2022-03-17 17:24:49,533 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 20 states have internal predecessors, (60), 11 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 10 states have call predecessors, (29), 9 states have call successors, (29) [2022-03-17 17:24:49,533 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 296 transitions. [2022-03-17 17:24:49,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-03-17 17:24:49,536 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:24:49,536 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-03-17 17:24:49,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-17 17:24:49,748 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:24:49,749 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:24:49,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:24:49,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1055508743, now seen corresponding path program 1 times [2022-03-17 17:24:49,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:24:49,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288848488] [2022-03-17 17:24:49,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:24:49,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:24:49,756 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:24:49,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [821187616] [2022-03-17 17:24:49,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:24:49,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:24:49,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:24:49,757 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 17:24:49,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-17 17:24:49,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:24:49,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-17 17:24:49,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:24:49,961 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 120 proven. 260 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-03-17 17:24:49,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:24:50,160 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2022-03-17 17:24:50,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:24:50,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288848488] [2022-03-17 17:24:50,160 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:24:50,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821187616] [2022-03-17 17:24:50,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821187616] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 17:24:50,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 17:24:50,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-17 17:24:50,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153234197] [2022-03-17 17:24:50,161 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 17:24:50,161 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-17 17:24:50,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:24:50,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-17 17:24:50,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-17 17:24:50,162 INFO L87 Difference]: Start difference. First operand 245 states and 296 transitions. Second operand has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 states have internal predecessors, (67), 12 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (32), 11 states have call predecessors, (32), 12 states have call successors, (32) [2022-03-17 17:24:50,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:24:50,531 INFO L93 Difference]: Finished difference Result 503 states and 602 transitions. [2022-03-17 17:24:50,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-17 17:24:50,532 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 states have internal predecessors, (67), 12 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (32), 11 states have call predecessors, (32), 12 states have call successors, (32) Word has length 106 [2022-03-17 17:24:50,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:24:50,533 INFO L225 Difference]: With dead ends: 503 [2022-03-17 17:24:50,533 INFO L226 Difference]: Without dead ends: 503 [2022-03-17 17:24:50,534 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-03-17 17:24:50,534 INFO L912 BasicCegarLoop]: 86 mSDtfsCounter, 216 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-17 17:24:50,534 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 390 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-17 17:24:50,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2022-03-17 17:24:50,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 484. [2022-03-17 17:24:50,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 317 states have (on average 1.1892744479495267) internal successors, (377), 340 states have internal predecessors, (377), 107 states have call successors, (107), 60 states have call predecessors, (107), 59 states have return successors, (101), 83 states have call predecessors, (101), 101 states have call successors, (101) [2022-03-17 17:24:50,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 585 transitions. [2022-03-17 17:24:50,543 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 585 transitions. Word has length 106 [2022-03-17 17:24:50,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:24:50,543 INFO L478 AbstractCegarLoop]: Abstraction has 484 states and 585 transitions. [2022-03-17 17:24:50,544 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 states have internal predecessors, (67), 12 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (32), 11 states have call predecessors, (32), 12 states have call successors, (32) [2022-03-17 17:24:50,544 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 585 transitions. [2022-03-17 17:24:50,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-03-17 17:24:50,544 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:24:50,544 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 15, 3, 3, 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] [2022-03-17 17:24:50,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-17 17:24:50,760 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-17 17:24:50,760 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:24:50,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:24:50,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1401143091, now seen corresponding path program 2 times [2022-03-17 17:24:50,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:24:50,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059328272] [2022-03-17 17:24:50,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:24:50,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:24:50,766 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:24:50,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [845918495] [2022-03-17 17:24:50,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 17:24:50,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:24:50,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:24:50,768 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 17:24:50,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-17 17:24:50,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 17:24:50,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 17:24:50,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-17 17:24:50,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:24:51,731 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-17 17:24:52,314 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 71 proven. 35 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-03-17 17:24:52,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:24:59,175 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 71 proven. 35 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-03-17 17:24:59,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:24:59,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059328272] [2022-03-17 17:24:59,175 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:24:59,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845918495] [2022-03-17 17:24:59,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845918495] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 17:24:59,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 17:24:59,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 26 [2022-03-17 17:24:59,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192889408] [2022-03-17 17:24:59,176 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 17:24:59,177 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-17 17:24:59,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:24:59,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-17 17:24:59,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2022-03-17 17:24:59,177 INFO L87 Difference]: Start difference. First operand 484 states and 585 transitions. Second operand has 26 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 15 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (32), 15 states have call predecessors, (32), 13 states have call successors, (32) [2022-03-17 17:25:11,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:25:11,614 INFO L93 Difference]: Finished difference Result 534 states and 642 transitions. [2022-03-17 17:25:11,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-17 17:25:11,614 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 15 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (32), 15 states have call predecessors, (32), 13 states have call successors, (32) Word has length 111 [2022-03-17 17:25:11,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:25:11,616 INFO L225 Difference]: With dead ends: 534 [2022-03-17 17:25:11,616 INFO L226 Difference]: Without dead ends: 495 [2022-03-17 17:25:11,617 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 195 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=374, Invalid=1108, Unknown=0, NotChecked=0, Total=1482 [2022-03-17 17:25:11,617 INFO L912 BasicCegarLoop]: 50 mSDtfsCounter, 139 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-03-17 17:25:11,617 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 521 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-03-17 17:25:11,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-03-17 17:25:11,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 440. [2022-03-17 17:25:11,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 288 states have (on average 1.1840277777777777) internal successors, (341), 309 states have internal predecessors, (341), 96 states have call successors, (96), 56 states have call predecessors, (96), 55 states have return successors, (91), 74 states have call predecessors, (91), 91 states have call successors, (91) [2022-03-17 17:25:11,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 528 transitions. [2022-03-17 17:25:11,626 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 528 transitions. Word has length 111 [2022-03-17 17:25:11,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:25:11,626 INFO L478 AbstractCegarLoop]: Abstraction has 440 states and 528 transitions. [2022-03-17 17:25:11,627 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 15 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (32), 15 states have call predecessors, (32), 13 states have call successors, (32) [2022-03-17 17:25:11,627 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 528 transitions. [2022-03-17 17:25:11,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-03-17 17:25:11,629 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:25:11,629 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:25:11,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-17 17:25:11,846 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:25:11,847 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:25:11,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:25:11,847 INFO L85 PathProgramCache]: Analyzing trace with hash 220761538, now seen corresponding path program 1 times [2022-03-17 17:25:11,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:25:11,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421856241] [2022-03-17 17:25:11,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:25:11,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:25:11,855 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:25:11,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [580590939] [2022-03-17 17:25:11,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:25:11,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:25:11,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:25:11,876 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 17:25:11,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-17 17:25:11,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:25:11,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-17 17:25:11,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:25:12,124 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 32 proven. 470 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-17 17:25:12,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:25:12,374 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 32 proven. 46 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-17 17:25:12,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:25:12,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421856241] [2022-03-17 17:25:12,374 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:25:12,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580590939] [2022-03-17 17:25:12,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580590939] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 17:25:12,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 17:25:12,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-03-17 17:25:12,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355028723] [2022-03-17 17:25:12,375 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 17:25:12,375 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-17 17:25:12,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:25:12,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-17 17:25:12,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-03-17 17:25:12,376 INFO L87 Difference]: Start difference. First operand 440 states and 528 transitions. Second operand has 18 states, 18 states have (on average 4.555555555555555) internal successors, (82), 18 states have internal predecessors, (82), 16 states have call successors, (38), 10 states have call predecessors, (38), 9 states have return successors, (36), 14 states have call predecessors, (36), 15 states have call successors, (36) [2022-03-17 17:25:12,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:25:12,968 INFO L93 Difference]: Finished difference Result 763 states and 883 transitions. [2022-03-17 17:25:12,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-17 17:25:12,968 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.555555555555555) internal successors, (82), 18 states have internal predecessors, (82), 16 states have call successors, (38), 10 states have call predecessors, (38), 9 states have return successors, (36), 14 states have call predecessors, (36), 15 states have call successors, (36) Word has length 118 [2022-03-17 17:25:12,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:25:12,971 INFO L225 Difference]: With dead ends: 763 [2022-03-17 17:25:12,971 INFO L226 Difference]: Without dead ends: 761 [2022-03-17 17:25:12,971 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=466, Unknown=0, NotChecked=0, Total=702 [2022-03-17 17:25:12,971 INFO L912 BasicCegarLoop]: 105 mSDtfsCounter, 303 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-17 17:25:12,972 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 496 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-17 17:25:12,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2022-03-17 17:25:12,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 746. [2022-03-17 17:25:12,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 500 states have (on average 1.128) internal successors, (564), 531 states have internal predecessors, (564), 159 states have call successors, (159), 88 states have call predecessors, (159), 86 states have return successors, (150), 126 states have call predecessors, (150), 150 states have call successors, (150) [2022-03-17 17:25:12,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 873 transitions. [2022-03-17 17:25:12,986 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 873 transitions. Word has length 118 [2022-03-17 17:25:12,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:25:12,987 INFO L478 AbstractCegarLoop]: Abstraction has 746 states and 873 transitions. [2022-03-17 17:25:12,987 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.555555555555555) internal successors, (82), 18 states have internal predecessors, (82), 16 states have call successors, (38), 10 states have call predecessors, (38), 9 states have return successors, (36), 14 states have call predecessors, (36), 15 states have call successors, (36) [2022-03-17 17:25:12,987 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 873 transitions. [2022-03-17 17:25:12,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-03-17 17:25:12,988 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:25:12,988 INFO L500 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 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] [2022-03-17 17:25:13,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-17 17:25:13,204 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:25:13,205 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:25:13,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:25:13,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1839670996, now seen corresponding path program 4 times [2022-03-17 17:25:13,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:25:13,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469271463] [2022-03-17 17:25:13,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:25:13,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:25:13,211 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:25:13,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1292163501] [2022-03-17 17:25:13,212 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-17 17:25:13,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:25:13,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:25:13,218 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 17:25:13,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-17 17:25:13,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-17 17:25:13,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 17:25:13,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-17 17:25:13,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:25:14,478 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 36 proven. 63 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-03-17 17:25:14,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:26:16,146 WARN L232 SmtUtils]: Spent 6.56s on a formula simplification that was a NOOP. DAG size: 150 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 17:27:35,128 WARN L232 SmtUtils]: Spent 32.51s on a formula simplification that was a NOOP. DAG size: 453 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)