/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/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench/prodbin-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 09:16:24,043 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 09:16:24,045 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 09:16:24,107 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 09:16:24,107 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 09:16:24,108 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 09:16:24,111 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 09:16:24,116 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 09:16:24,118 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 09:16:24,122 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 09:16:24,123 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 09:16:24,124 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 09:16:24,125 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 09:16:24,127 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 09:16:24,128 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 09:16:24,130 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 09:16:24,131 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 09:16:24,132 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 09:16:24,134 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 09:16:24,139 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 09:16:24,141 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 09:16:24,142 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 09:16:24,143 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 09:16:24,144 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 09:16:24,145 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 09:16:24,154 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 09:16:24,162 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 09:16:24,163 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 09:16:24,165 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 09:16:24,166 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-20 09:16:24,191 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 09:16:24,192 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 09:16:24,193 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 09:16:24,193 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 09:16:24,194 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 09:16:24,194 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 09:16:24,194 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 09:16:24,194 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 09:16:24,194 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 09:16:24,195 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 09:16:24,195 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 09:16:24,195 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 09:16:24,196 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 09:16:24,196 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 09:16:24,196 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 09:16:24,196 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 09:16:24,196 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 09:16:24,196 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 09:16:24,197 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 09:16:24,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 09:16:24,197 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 09:16:24,197 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 09:16:24,197 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 09:16:24,198 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 09:16:24,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 09:16:24,198 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 09:16:24,198 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-20 09:16:24,198 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-20 09:16:24,199 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 09:16:24,200 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 09:16:24,458 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 09:16:24,483 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 09:16:24,485 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 09:16:24,486 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 09:16:24,487 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 09:16:24,488 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/prodbin-ll.c [2022-03-20 09:16:24,550 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80a75180f/90e0d7ec187646e2a559800d126deaac/FLAG33ea50336 [2022-03-20 09:16:24,965 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 09:16:24,965 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/prodbin-ll.c [2022-03-20 09:16:24,970 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80a75180f/90e0d7ec187646e2a559800d126deaac/FLAG33ea50336 [2022-03-20 09:16:25,371 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80a75180f/90e0d7ec187646e2a559800d126deaac [2022-03-20 09:16:25,374 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 09:16:25,375 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 09:16:25,379 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 09:16:25,380 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 09:16:25,383 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 09:16:25,384 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 09:16:25" (1/1) ... [2022-03-20 09:16:25,385 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a936d24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:16:25, skipping insertion in model container [2022-03-20 09:16:25,386 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 09:16:25" (1/1) ... [2022-03-20 09:16:25,391 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 09:16:25,411 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 09:16:25,552 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/prodbin-ll.c[537,550] [2022-03-20 09:16:25,563 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 09:16:25,570 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 09:16:25,582 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/prodbin-ll.c[537,550] [2022-03-20 09:16:25,587 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 09:16:25,596 INFO L208 MainTranslator]: Completed translation [2022-03-20 09:16:25,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:16:25 WrapperNode [2022-03-20 09:16:25,596 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 09:16:25,598 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 09:16:25,599 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 09:16:25,599 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 09:16:25,606 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:16:25" (1/1) ... [2022-03-20 09:16:25,606 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:16:25" (1/1) ... [2022-03-20 09:16:25,612 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:16:25" (1/1) ... [2022-03-20 09:16:25,612 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:16:25" (1/1) ... [2022-03-20 09:16:25,615 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:16:25" (1/1) ... [2022-03-20 09:16:25,618 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:16:25" (1/1) ... [2022-03-20 09:16:25,620 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:16:25" (1/1) ... [2022-03-20 09:16:25,621 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 09:16:25,622 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 09:16:25,622 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 09:16:25,622 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 09:16:25,623 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:16:25" (1/1) ... [2022-03-20 09:16:25,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 09:16:25,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:16:25,653 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 09:16:25,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 09:16:25,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 09:16:25,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 09:16:25,689 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 09:16:25,689 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 09:16:25,689 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 09:16:25,689 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 09:16:25,689 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 09:16:25,689 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 09:16:25,690 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 09:16:25,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 09:16:25,690 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 09:16:25,690 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 09:16:25,690 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 09:16:25,690 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 09:16:25,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 09:16:25,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 09:16:25,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 09:16:25,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 09:16:25,691 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 09:16:25,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 09:16:25,742 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 09:16:25,744 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 09:16:25,891 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 09:16:25,896 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 09:16:25,896 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 09:16:25,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 09:16:25 BoogieIcfgContainer [2022-03-20 09:16:25,898 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 09:16:25,899 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 09:16:25,899 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 09:16:25,916 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 09:16:25,919 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 09:16:25" (1/1) ... [2022-03-20 09:16:25,921 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-03-20 09:16:25,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 09:16:25 BasicIcfg [2022-03-20 09:16:25,945 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 09:16:25,946 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 09:16:25,946 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 09:16:25,965 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 09:16:25,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 09:16:25" (1/4) ... [2022-03-20 09:16:25,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6230e540 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 09:16:25, skipping insertion in model container [2022-03-20 09:16:25,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:16:25" (2/4) ... [2022-03-20 09:16:25,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6230e540 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 09:16:25, skipping insertion in model container [2022-03-20 09:16:25,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 09:16:25" (3/4) ... [2022-03-20 09:16:25,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6230e540 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 09:16:25, skipping insertion in model container [2022-03-20 09:16:25,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 09:16:25" (4/4) ... [2022-03-20 09:16:25,968 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll.cqvasr [2022-03-20 09:16:25,972 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 09:16:25,973 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 09:16:26,008 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 09:16:26,014 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 09:16:26,014 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 09:16:26,027 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 09:16:26,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 09:16:26,032 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:16:26,032 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:16:26,033 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:16:26,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:16:26,037 INFO L85 PathProgramCache]: Analyzing trace with hash -771267128, now seen corresponding path program 1 times [2022-03-20 09:16:26,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:16:26,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652569091] [2022-03-20 09:16:26,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:16:26,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:16:26,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:16:26,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:16:26,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:16:26,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 09:16:26,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:16:26,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:16:26,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:16:26,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652569091] [2022-03-20 09:16:26,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652569091] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 09:16:26,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 09:16:26,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 09:16:26,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42667867] [2022-03-20 09:16:26,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 09:16:26,270 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 09:16:26,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:16:26,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 09:16:26,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 09:16:26,304 INFO L87 Difference]: Start difference. First operand has 29 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 09:16:26,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:16:26,366 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2022-03-20 09:16:26,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 09:16:26,369 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-20 09:16:26,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:16:26,382 INFO L225 Difference]: With dead ends: 49 [2022-03-20 09:16:26,382 INFO L226 Difference]: Without dead ends: 24 [2022-03-20 09:16:26,385 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 09:16:26,389 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 09:16:26,391 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 31 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 09:16:26,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-03-20 09:16:26,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-03-20 09:16:26,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 09:16:26,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-03-20 09:16:26,437 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 17 [2022-03-20 09:16:26,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:16:26,438 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-03-20 09:16:26,439 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 09:16:26,439 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-03-20 09:16:26,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 09:16:26,440 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:16:26,440 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:16:26,441 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 09:16:26,441 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:16:26,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:16:26,443 INFO L85 PathProgramCache]: Analyzing trace with hash -769390295, now seen corresponding path program 1 times [2022-03-20 09:16:26,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:16:26,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108021415] [2022-03-20 09:16:26,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:16:26,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:16:26,476 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:16:26,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [819443818] [2022-03-20 09:16:26,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:16:26,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:16:26,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:16:26,481 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:16:26,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 09:16:26,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:16:26,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 09:16:26,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:16:26,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:16:26,687 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 09:16:26,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:16:26,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108021415] [2022-03-20 09:16:26,688 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:16:26,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819443818] [2022-03-20 09:16:26,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819443818] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 09:16:26,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 09:16:26,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 09:16:26,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661877077] [2022-03-20 09:16:26,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 09:16:26,693 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 09:16:26,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:16:26,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 09:16:26,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 09:16:26,697 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 09:16:26,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:16:26,753 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2022-03-20 09:16:26,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 09:16:26,754 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-20 09:16:26,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:16:26,755 INFO L225 Difference]: With dead ends: 36 [2022-03-20 09:16:26,755 INFO L226 Difference]: Without dead ends: 34 [2022-03-20 09:16:26,756 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 09:16:26,757 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 8 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 09:16:26,757 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 75 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 09:16:26,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-20 09:16:26,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2022-03-20 09:16:26,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 09:16:26,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-03-20 09:16:26,765 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 17 [2022-03-20 09:16:26,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:16:26,765 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-03-20 09:16:26,765 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 09:16:26,765 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-03-20 09:16:26,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 09:16:26,766 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:16:26,766 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:16:26,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 09:16:26,990 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:16:26,991 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:16:26,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:16:26,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1186133628, now seen corresponding path program 1 times [2022-03-20 09:16:26,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:16:26,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423065046] [2022-03-20 09:16:26,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:16:26,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:16:27,003 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:16:27,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [280145328] [2022-03-20 09:16:27,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:16:27,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:16:27,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:16:27,005 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:16:27,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 09:16:27,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:16:27,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 09:16:27,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:16:27,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:16:27,150 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 09:16:27,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:16:27,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423065046] [2022-03-20 09:16:27,153 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:16:27,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280145328] [2022-03-20 09:16:27,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280145328] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 09:16:27,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 09:16:27,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 09:16:27,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506948335] [2022-03-20 09:16:27,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 09:16:27,155 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 09:16:27,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:16:27,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 09:16:27,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 09:16:27,157 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:16:27,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:16:27,205 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2022-03-20 09:16:27,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 09:16:27,205 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-03-20 09:16:27,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:16:27,206 INFO L225 Difference]: With dead ends: 40 [2022-03-20 09:16:27,206 INFO L226 Difference]: Without dead ends: 33 [2022-03-20 09:16:27,206 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 09:16:27,207 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 14 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 09:16:27,207 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 89 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 09:16:27,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-20 09:16:27,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2022-03-20 09:16:27,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 09:16:27,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2022-03-20 09:16:27,213 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 23 [2022-03-20 09:16:27,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:16:27,213 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2022-03-20 09:16:27,213 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:16:27,213 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2022-03-20 09:16:27,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-20 09:16:27,214 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:16:27,214 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:16:27,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 09:16:27,436 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-20 09:16:27,436 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:16:27,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:16:27,437 INFO L85 PathProgramCache]: Analyzing trace with hash 921463763, now seen corresponding path program 1 times [2022-03-20 09:16:27,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:16:27,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494676497] [2022-03-20 09:16:27,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:16:27,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:16:27,448 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:16:27,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [20535405] [2022-03-20 09:16:27,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:16:27,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:16:27,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:16:27,450 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:16:27,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 09:16:27,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:16:27,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-20 09:16:27,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:16:30,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:16:30,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:16:41,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:16:41,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:16:41,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494676497] [2022-03-20 09:16:41,257 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:16:41,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20535405] [2022-03-20 09:16:41,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20535405] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:16:41,257 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 09:16:41,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2022-03-20 09:16:41,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312094880] [2022-03-20 09:16:41,258 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 09:16:41,258 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 09:16:41,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:16:41,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 09:16:41,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-03-20 09:16:41,260 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 09:16:44,977 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:16:48,639 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:16:50,400 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:16:50,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:16:50,428 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2022-03-20 09:16:50,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 09:16:50,429 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 26 [2022-03-20 09:16:50,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:16:50,431 INFO L225 Difference]: With dead ends: 49 [2022-03-20 09:16:50,431 INFO L226 Difference]: Without dead ends: 47 [2022-03-20 09:16:50,432 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-03-20 09:16:50,433 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 34 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-03-20 09:16:50,433 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 93 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2022-03-20 09:16:50,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-20 09:16:50,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2022-03-20 09:16:50,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.2) internal successors, (36), 32 states have internal predecessors, (36), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 09:16:50,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2022-03-20 09:16:50,441 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 26 [2022-03-20 09:16:50,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:16:50,442 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2022-03-20 09:16:50,442 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 09:16:50,442 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2022-03-20 09:16:50,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-20 09:16:50,443 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:16:50,443 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:16:50,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 09:16:50,644 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:16:50,644 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:16:50,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:16:50,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1808967444, now seen corresponding path program 1 times [2022-03-20 09:16:50,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:16:50,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092468431] [2022-03-20 09:16:50,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:16:50,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:16:50,655 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:16:50,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1318362138] [2022-03-20 09:16:50,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:16:50,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:16:50,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:16:50,663 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:16:50,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 09:16:50,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:16:50,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 09:16:50,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:16:51,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:16:51,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:16:52,130 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:16:52,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:16:52,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092468431] [2022-03-20 09:16:52,131 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:16:52,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318362138] [2022-03-20 09:16:52,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318362138] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:16:52,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 09:16:52,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2022-03-20 09:16:52,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989563708] [2022-03-20 09:16:52,132 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 09:16:52,132 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 09:16:52,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:16:52,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 09:16:52,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-03-20 09:16:52,133 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 12 states have internal predecessors, (26), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 09:16:53,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:16:53,501 INFO L93 Difference]: Finished difference Result 80 states and 94 transitions. [2022-03-20 09:16:53,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 09:16:53,501 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 12 states have internal predecessors, (26), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 26 [2022-03-20 09:16:53,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:16:53,503 INFO L225 Difference]: With dead ends: 80 [2022-03-20 09:16:53,503 INFO L226 Difference]: Without dead ends: 73 [2022-03-20 09:16:53,503 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2022-03-20 09:16:53,504 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 30 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 09:16:53,504 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 157 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 09:16:53,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-20 09:16:53,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 70. [2022-03-20 09:16:53,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 50 states have (on average 1.22) internal successors, (61), 53 states have internal predecessors, (61), 12 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 09:16:53,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 83 transitions. [2022-03-20 09:16:53,515 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 83 transitions. Word has length 26 [2022-03-20 09:16:53,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:16:53,515 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 83 transitions. [2022-03-20 09:16:53,516 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 12 states have internal predecessors, (26), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 09:16:53,516 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 83 transitions. [2022-03-20 09:16:53,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 09:16:53,516 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:16:53,517 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:16:53,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 09:16:53,738 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:16:53,739 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:16:53,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:16:53,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1415101266, now seen corresponding path program 1 times [2022-03-20 09:16:53,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:16:53,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451341823] [2022-03-20 09:16:53,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:16:53,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:16:53,751 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:16:53,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [945353043] [2022-03-20 09:16:53,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:16:53,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:16:53,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:16:53,756 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:16:53,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 09:16:53,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:16:53,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 09:16:53,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:16:53,911 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 09:16:53,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:16:54,053 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 09:16:54,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:16:54,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451341823] [2022-03-20 09:16:54,053 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:16:54,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945353043] [2022-03-20 09:16:54,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945353043] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:16:54,054 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 09:16:54,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-03-20 09:16:54,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466762865] [2022-03-20 09:16:54,054 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 09:16:54,054 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 09:16:54,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:16:54,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 09:16:54,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-20 09:16:54,055 INFO L87 Difference]: Start difference. First operand 70 states and 83 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 09:16:56,059 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:16:56,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:16:56,160 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2022-03-20 09:16:56,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 09:16:56,160 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 32 [2022-03-20 09:16:56,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:16:56,161 INFO L225 Difference]: With dead ends: 77 [2022-03-20 09:16:56,161 INFO L226 Difference]: Without dead ends: 70 [2022-03-20 09:16:56,162 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-03-20 09:16:56,167 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 17 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-20 09:16:56,168 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 100 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-03-20 09:16:56,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-20 09:16:56,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2022-03-20 09:16:56,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 50 states have (on average 1.14) internal successors, (57), 52 states have internal predecessors, (57), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 09:16:56,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 78 transitions. [2022-03-20 09:16:56,180 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 78 transitions. Word has length 32 [2022-03-20 09:16:56,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:16:56,180 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 78 transitions. [2022-03-20 09:16:56,180 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 09:16:56,180 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 78 transitions. [2022-03-20 09:16:56,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 09:16:56,181 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:16:56,181 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:16:56,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 09:16:56,387 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:16:56,387 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:16:56,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:16:56,388 INFO L85 PathProgramCache]: Analyzing trace with hash -847876140, now seen corresponding path program 1 times [2022-03-20 09:16:56,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:16:56,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128923472] [2022-03-20 09:16:56,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:16:56,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:16:56,396 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:16:56,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [876025361] [2022-03-20 09:16:56,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:16:56,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:16:56,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:16:56,403 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:16:56,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 09:16:56,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:16:56,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-20 09:16:56,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:16:56,918 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 09:16:59,787 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 09:16:59,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:17:02,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:17:02,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128923472] [2022-03-20 09:17:02,812 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:17:02,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876025361] [2022-03-20 09:17:02,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876025361] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:17:02,812 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 09:17:02,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-20 09:17:02,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129060761] [2022-03-20 09:17:02,812 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 09:17:02,813 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 09:17:02,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:17:02,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 09:17:02,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-03-20 09:17:02,814 INFO L87 Difference]: Start difference. First operand 69 states and 78 transitions. Second operand has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:17:03,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:17:03,799 INFO L93 Difference]: Finished difference Result 91 states and 102 transitions. [2022-03-20 09:17:03,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 09:17:03,800 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 44 [2022-03-20 09:17:03,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:17:03,801 INFO L225 Difference]: With dead ends: 91 [2022-03-20 09:17:03,801 INFO L226 Difference]: Without dead ends: 89 [2022-03-20 09:17:03,801 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-03-20 09:17:03,802 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 19 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 09:17:03,802 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 225 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 189 Invalid, 0 Unknown, 23 Unchecked, 0.4s Time] [2022-03-20 09:17:03,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-03-20 09:17:03,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 81. [2022-03-20 09:17:03,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 59 states have (on average 1.1355932203389831) internal successors, (67), 62 states have internal predecessors, (67), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 09:17:03,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 92 transitions. [2022-03-20 09:17:03,815 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 92 transitions. Word has length 44 [2022-03-20 09:17:03,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:17:03,815 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 92 transitions. [2022-03-20 09:17:03,815 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:17:03,815 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 92 transitions. [2022-03-20 09:17:03,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 09:17:03,817 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:17:03,817 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:17:03,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 09:17:04,031 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:17:04,032 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:17:04,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:17:04,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1358410317, now seen corresponding path program 2 times [2022-03-20 09:17:04,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:17:04,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310754430] [2022-03-20 09:17:04,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:17:04,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:17:04,040 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:17:04,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1030944619] [2022-03-20 09:17:04,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 09:17:04,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:17:04,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:17:04,046 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:17:04,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 09:17:04,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 09:17:04,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:17:04,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-20 09:17:04,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:17:13,753 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 09:17:13,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:17:21,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:17:21,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310754430] [2022-03-20 09:17:21,077 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:17:21,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030944619] [2022-03-20 09:17:21,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030944619] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:17:21,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 09:17:21,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-03-20 09:17:21,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134203452] [2022-03-20 09:17:21,077 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 09:17:21,078 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 09:17:21,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:17:21,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 09:17:21,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=409, Unknown=1, NotChecked=0, Total=506 [2022-03-20 09:17:21,078 INFO L87 Difference]: Start difference. First operand 81 states and 92 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 15 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:17:23,208 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:17:25,063 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:17:27,782 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:17:27,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:17:27,814 INFO L93 Difference]: Finished difference Result 102 states and 115 transitions. [2022-03-20 09:17:27,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 09:17:27,814 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 15 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 44 [2022-03-20 09:17:27,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:17:27,815 INFO L225 Difference]: With dead ends: 102 [2022-03-20 09:17:27,815 INFO L226 Difference]: Without dead ends: 100 [2022-03-20 09:17:27,816 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=113, Invalid=536, Unknown=1, NotChecked=0, Total=650 [2022-03-20 09:17:27,816 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 31 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-03-20 09:17:27,817 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 159 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 297 Invalid, 1 Unknown, 0 Unchecked, 6.6s Time] [2022-03-20 09:17:27,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-20 09:17:27,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 90. [2022-03-20 09:17:27,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 66 states have (on average 1.1363636363636365) internal successors, (75), 69 states have internal predecessors, (75), 14 states have call successors, (14), 10 states have call predecessors, (14), 9 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 09:17:27,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 102 transitions. [2022-03-20 09:17:27,827 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 102 transitions. Word has length 44 [2022-03-20 09:17:27,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:17:27,827 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 102 transitions. [2022-03-20 09:17:27,828 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 15 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 09:17:27,828 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 102 transitions. [2022-03-20 09:17:27,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-20 09:17:27,829 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:17:27,829 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:17:27,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 09:17:28,035 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:17:28,035 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:17:28,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:17:28,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1689275670, now seen corresponding path program 3 times [2022-03-20 09:17:28,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:17:28,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59368668] [2022-03-20 09:17:28,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:17:28,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:17:28,048 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:17:28,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [940260540] [2022-03-20 09:17:28,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 09:17:28,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:17:28,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:17:28,049 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:17:28,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 09:17:28,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-20 09:17:28,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:17:28,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 09:17:28,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:17:30,819 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 09:17:32,249 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 42 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-20 09:17:32,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:17:32,919 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 38 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 09:17:32,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:17:32,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59368668] [2022-03-20 09:17:32,919 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:17:32,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940260540] [2022-03-20 09:17:32,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940260540] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:17:32,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 09:17:32,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2022-03-20 09:17:32,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372749081] [2022-03-20 09:17:32,922 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 09:17:32,922 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 09:17:32,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:17:32,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 09:17:32,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=239, Unknown=1, NotChecked=0, Total=306 [2022-03-20 09:17:32,923 INFO L87 Difference]: Start difference. First operand 90 states and 102 transitions. Second operand has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 09:17:34,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:17:34,076 INFO L93 Difference]: Finished difference Result 106 states and 121 transitions. [2022-03-20 09:17:34,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 09:17:34,076 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 53 [2022-03-20 09:17:34,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:17:34,077 INFO L225 Difference]: With dead ends: 106 [2022-03-20 09:17:34,077 INFO L226 Difference]: Without dead ends: 50 [2022-03-20 09:17:34,077 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=119, Invalid=432, Unknown=1, NotChecked=0, Total=552 [2022-03-20 09:17:34,078 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 24 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 09:17:34,078 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 188 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 144 Invalid, 0 Unknown, 6 Unchecked, 0.3s Time] [2022-03-20 09:17:34,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-20 09:17:34,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2022-03-20 09:17:34,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 35 states have internal predecessors, (35), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 09:17:34,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2022-03-20 09:17:34,083 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 53 [2022-03-20 09:17:34,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:17:34,083 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2022-03-20 09:17:34,083 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 09:17:34,083 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2022-03-20 09:17:34,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-20 09:17:34,084 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:17:34,084 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:17:34,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 09:17:34,301 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,SelfDestructingSolverStorable8 [2022-03-20 09:17:34,302 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:17:34,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:17:34,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1043440105, now seen corresponding path program 2 times [2022-03-20 09:17:34,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:17:34,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527617978] [2022-03-20 09:17:34,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:17:34,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:17:34,310 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:17:34,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1818913675] [2022-03-20 09:17:34,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 09:17:34,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:17:34,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:17:34,312 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:17:34,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 09:17:34,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 09:17:34,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:17:34,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-20 09:17:34,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:18:21,047 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 09:18:21,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:18:35,012 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 09:18:35,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:18:35,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527617978] [2022-03-20 09:18:35,013 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:18:35,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818913675] [2022-03-20 09:18:35,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818913675] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:18:35,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 09:18:35,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 32 [2022-03-20 09:18:35,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689679448] [2022-03-20 09:18:35,013 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 09:18:35,014 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-20 09:18:35,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:18:35,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-20 09:18:35,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=823, Unknown=0, NotChecked=0, Total=992 [2022-03-20 09:18:35,015 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 32 states, 32 states have (on average 1.71875) internal successors, (55), 29 states have internal predecessors, (55), 11 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 9 states have call successors, (11) [2022-03-20 09:18:47,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:18:47,035 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2022-03-20 09:18:47,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-20 09:18:47,036 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.71875) internal successors, (55), 29 states have internal predecessors, (55), 11 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 9 states have call successors, (11) Word has length 53 [2022-03-20 09:18:47,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:18:47,036 INFO L225 Difference]: With dead ends: 84 [2022-03-20 09:18:47,036 INFO L226 Difference]: Without dead ends: 82 [2022-03-20 09:18:47,037 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=379, Invalid=1601, Unknown=0, NotChecked=0, Total=1980 [2022-03-20 09:18:47,037 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 115 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-03-20 09:18:47,038 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 337 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-03-20 09:18:47,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-03-20 09:18:47,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-03-20 09:18:47,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 61 states have (on average 1.0163934426229508) internal successors, (62), 62 states have internal predecessors, (62), 14 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 09:18:47,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 89 transitions. [2022-03-20 09:18:47,051 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 89 transitions. Word has length 53 [2022-03-20 09:18:47,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:18:47,052 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 89 transitions. [2022-03-20 09:18:47,052 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.71875) internal successors, (55), 29 states have internal predecessors, (55), 11 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 9 states have call successors, (11) [2022-03-20 09:18:47,052 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 89 transitions. [2022-03-20 09:18:47,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-20 09:18:47,053 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:18:47,053 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:18:47,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-20 09:18:47,253 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-20 09:18:47,254 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:18:47,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:18:47,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1099173111, now seen corresponding path program 3 times [2022-03-20 09:18:47,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:18:47,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115849432] [2022-03-20 09:18:47,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:18:47,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:18:47,269 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:18:47,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1959176344] [2022-03-20 09:18:47,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 09:18:47,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:18:47,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:18:47,277 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:18:47,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 09:18:47,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-03-20 09:18:47,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:18:47,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-20 09:18:47,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:18:54,128 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 09:18:57,151 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 46 proven. 246 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-03-20 09:18:57,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:19:08,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:19:08,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115849432] [2022-03-20 09:19:08,665 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:19:08,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959176344] [2022-03-20 09:19:08,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959176344] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:19:08,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 09:19:08,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2022-03-20 09:19:08,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743531331] [2022-03-20 09:19:08,665 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 09:19:08,666 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-20 09:19:08,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:19:08,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-20 09:19:08,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=515, Invalid=1460, Unknown=5, NotChecked=0, Total=1980 [2022-03-20 09:19:08,667 INFO L87 Difference]: Start difference. First operand 82 states and 89 transitions. Second operand has 32 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 12 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-20 09:19:15,021 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:19:18,620 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:19:20,001 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:19:30,695 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:19:39,221 WARN L232 SmtUtils]: Spent 5.13s on a formula simplification. DAG size of input: 65 DAG size of output: 62 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 09:19:57,622 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:20:23,386 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:21:05,725 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:21:10,300 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:21:25,633 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:21:26,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:21:26,515 INFO L93 Difference]: Finished difference Result 96 states and 103 transitions. [2022-03-20 09:21:26,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-20 09:21:26,515 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 12 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 11 states have call successors, (12) Word has length 107 [2022-03-20 09:21:26,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:21:26,516 INFO L225 Difference]: With dead ends: 96 [2022-03-20 09:21:26,516 INFO L226 Difference]: Without dead ends: 94 [2022-03-20 09:21:26,518 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 142 SyntacticMatches, 11 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 5 DeprecatedPredicates, 1844 ImplicationChecksByTransitivity, 132.6s TimeCoverageRelationStatistics Valid=1295, Invalid=3807, Unknown=10, NotChecked=0, Total=5112 [2022-03-20 09:21:26,518 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 109 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 47 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 21.0s IncrementalHoareTripleChecker+Time [2022-03-20 09:21:26,518 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 193 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 297 Invalid, 6 Unknown, 26 Unchecked, 21.0s Time] [2022-03-20 09:21:26,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-03-20 09:21:26,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2022-03-20 09:21:26,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 69 states have internal predecessors, (69), 15 states have call successors, (15), 8 states have call predecessors, (15), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 09:21:26,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 98 transitions. [2022-03-20 09:21:26,532 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 98 transitions. Word has length 107 [2022-03-20 09:21:26,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:21:26,533 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 98 transitions. [2022-03-20 09:21:26,533 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 12 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-20 09:21:26,533 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 98 transitions. [2022-03-20 09:21:26,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-20 09:21:26,535 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:21:26,535 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:21:26,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 09:21:26,751 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,SelfDestructingSolverStorable10 [2022-03-20 09:21:26,752 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:21:26,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:21:26,752 INFO L85 PathProgramCache]: Analyzing trace with hash 160684340, now seen corresponding path program 4 times [2022-03-20 09:21:26,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:21:26,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795097921] [2022-03-20 09:21:26,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:21:26,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:21:26,761 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:21:26,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [709458603] [2022-03-20 09:21:26,761 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 09:21:26,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:21:26,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:21:26,765 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:21:26,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 09:21:26,822 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 09:21:26,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:21:26,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 84 conjunts are in the unsatisfiable core [2022-03-20 09:21:26,826 INFO L286 TraceCheckSpWp]: Computing forward predicates...