/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-scaling/ps4-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 11:39:12,436 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 11:39:12,437 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 11:39:12,470 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 11:39:12,471 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 11:39:12,472 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 11:39:12,473 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 11:39:12,475 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 11:39:12,477 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 11:39:12,478 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 11:39:12,479 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 11:39:12,480 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 11:39:12,480 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 11:39:12,481 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 11:39:12,482 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 11:39:12,483 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 11:39:12,484 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 11:39:12,484 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 11:39:12,486 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 11:39:12,488 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 11:39:12,490 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 11:39:12,491 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 11:39:12,492 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 11:39:12,493 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 11:39:12,493 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 11:39:12,496 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 11:39:12,503 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 11:39:12,504 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 11:39:12,505 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 11:39:12,509 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 11:39:12,541 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 11:39:12,542 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 11:39:12,544 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 11:39:12,544 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 11:39:12,545 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 11:39:12,545 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 11:39:12,545 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 11:39:12,545 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 11:39:12,546 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 11:39:12,546 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 11:39:12,547 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 11:39:12,547 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 11:39:12,547 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 11:39:12,547 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 11:39:12,547 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 11:39:12,547 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 11:39:12,547 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 11:39:12,548 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 11:39:12,548 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 11:39:12,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 11:39:12,548 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 11:39:12,548 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 11:39:12,549 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 11:39:12,549 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 11:39:12,549 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 11:39:12,549 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 11:39:12,549 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-20 11:39:12,549 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-20 11:39:12,551 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 11:39:12,551 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 11:39:12,793 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 11:39:12,823 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 11:39:12,825 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 11:39:12,826 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 11:39:12,827 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 11:39:12,828 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound100.c [2022-03-20 11:39:12,876 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f15d6c8c/3965ae8185ec4e1b97b43c1a2f56f079/FLAGf72d5e352 [2022-03-20 11:39:13,261 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 11:39:13,262 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound100.c [2022-03-20 11:39:13,266 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f15d6c8c/3965ae8185ec4e1b97b43c1a2f56f079/FLAGf72d5e352 [2022-03-20 11:39:13,277 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f15d6c8c/3965ae8185ec4e1b97b43c1a2f56f079 [2022-03-20 11:39:13,279 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 11:39:13,280 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 11:39:13,282 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 11:39:13,282 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 11:39:13,285 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 11:39:13,286 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 11:39:13" (1/1) ... [2022-03-20 11:39:13,287 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@236136da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:39:13, skipping insertion in model container [2022-03-20 11:39:13,287 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 11:39:13" (1/1) ... [2022-03-20 11:39:13,295 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 11:39:13,307 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 11:39:13,458 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound100.c[458,471] [2022-03-20 11:39:13,474 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 11:39:13,484 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 11:39:13,493 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound100.c[458,471] [2022-03-20 11:39:13,500 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 11:39:13,510 INFO L208 MainTranslator]: Completed translation [2022-03-20 11:39:13,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:39:13 WrapperNode [2022-03-20 11:39:13,510 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 11:39:13,511 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 11:39:13,512 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 11:39:13,512 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 11:39:13,522 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:39:13" (1/1) ... [2022-03-20 11:39:13,522 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:39:13" (1/1) ... [2022-03-20 11:39:13,527 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:39:13" (1/1) ... [2022-03-20 11:39:13,528 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:39:13" (1/1) ... [2022-03-20 11:39:13,541 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:39:13" (1/1) ... [2022-03-20 11:39:13,544 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:39:13" (1/1) ... [2022-03-20 11:39:13,546 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:39:13" (1/1) ... [2022-03-20 11:39:13,552 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 11:39:13,553 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 11:39:13,553 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 11:39:13,553 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 11:39:13,554 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:39:13" (1/1) ... [2022-03-20 11:39:13,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 11:39:13,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:39:13,584 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 11:39:13,596 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 11:39:13,621 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 11:39:13,621 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 11:39:13,622 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 11:39:13,622 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 11:39:13,622 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 11:39:13,623 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 11:39:13,623 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 11:39:13,623 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 11:39:13,624 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 11:39:13,624 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 11:39:13,624 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2022-03-20 11:39:13,624 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 11:39:13,624 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 11:39:13,625 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 11:39:13,625 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 11:39:13,625 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 11:39:13,625 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 11:39:13,625 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 11:39:13,625 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 11:39:13,625 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 11:39:13,675 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 11:39:13,677 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 11:39:13,809 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 11:39:13,827 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 11:39:13,827 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 11:39:13,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 11:39:13 BoogieIcfgContainer [2022-03-20 11:39:13,829 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 11:39:13,830 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 11:39:13,830 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 11:39:13,830 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 11:39:13,833 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 11:39:13" (1/1) ... [2022-03-20 11:39:13,835 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-03-20 11:39:13,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 11:39:13 BasicIcfg [2022-03-20 11:39:13,877 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 11:39:13,878 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 11:39:13,878 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 11:39:13,881 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 11:39:13,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 11:39:13" (1/4) ... [2022-03-20 11:39:13,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f079e86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 11:39:13, skipping insertion in model container [2022-03-20 11:39:13,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:39:13" (2/4) ... [2022-03-20 11:39:13,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f079e86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 11:39:13, skipping insertion in model container [2022-03-20 11:39:13,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 11:39:13" (3/4) ... [2022-03-20 11:39:13,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f079e86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 11:39:13, skipping insertion in model container [2022-03-20 11:39:13,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 11:39:13" (4/4) ... [2022-03-20 11:39:13,883 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_valuebound100.cqvasr [2022-03-20 11:39:13,888 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 11:39:13,903 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 11:39:13,975 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 11:39:13,981 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 11:39:13,981 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 11:39:13,995 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 11:39:13,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 11:39:13,999 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:39:14,000 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 11:39:14,000 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:39:14,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:39:14,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1885409022, now seen corresponding path program 1 times [2022-03-20 11:39:14,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:39:14,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167767550] [2022-03-20 11:39:14,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:39:14,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:39:14,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:39:14,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 11:39:14,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:39:14,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 11:39:14,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:39:14,222 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 11:39:14,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:39:14,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167767550] [2022-03-20 11:39:14,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167767550] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 11:39:14,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 11:39:14,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 11:39:14,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551415201] [2022-03-20 11:39:14,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 11:39:14,230 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 11:39:14,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:39:14,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 11:39:14,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 11:39:14,260 INFO L87 Difference]: Start difference. First operand has 28 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 11:39:14,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:39:14,333 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2022-03-20 11:39:14,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 11:39:14,336 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-20 11:39:14,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:39:14,342 INFO L225 Difference]: With dead ends: 47 [2022-03-20 11:39:14,342 INFO L226 Difference]: Without dead ends: 23 [2022-03-20 11:39:14,345 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 11:39:14,349 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 11:39:14,350 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 29 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 11:39:14,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-20 11:39:14,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-03-20 11:39:14,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 11:39:14,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2022-03-20 11:39:14,400 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 17 [2022-03-20 11:39:14,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:39:14,400 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2022-03-20 11:39:14,401 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 11:39:14,401 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2022-03-20 11:39:14,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 11:39:14,402 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:39:14,402 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 11:39:14,403 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 11:39:14,403 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:39:14,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:39:14,404 INFO L85 PathProgramCache]: Analyzing trace with hash 603980644, now seen corresponding path program 1 times [2022-03-20 11:39:14,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:39:14,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79873365] [2022-03-20 11:39:14,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:39:14,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:39:14,443 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:39:14,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1562947043] [2022-03-20 11:39:14,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:39:14,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:39:14,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:39:14,451 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 11:39:14,479 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 11:39:14,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:39:14,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 11:39:14,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:39:14,656 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 11:39:14,657 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 11:39:14,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:39:14,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79873365] [2022-03-20 11:39:14,658 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:39:14,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562947043] [2022-03-20 11:39:14,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562947043] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 11:39:14,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 11:39:14,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 11:39:14,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293254801] [2022-03-20 11:39:14,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 11:39:14,665 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 11:39:14,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:39:14,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 11:39:14,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 11:39:14,671 INFO L87 Difference]: Start difference. First operand 23 states and 25 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 11:39:14,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:39:14,737 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-03-20 11:39:14,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 11:39:14,738 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 11:39:14,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:39:14,740 INFO L225 Difference]: With dead ends: 34 [2022-03-20 11:39:14,740 INFO L226 Difference]: Without dead ends: 30 [2022-03-20 11:39:14,741 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 11:39:14,742 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 11:39:14,743 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 83 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 11:39:14,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-20 11:39:14,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-03-20 11:39:14,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 11:39:14,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-03-20 11:39:14,761 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 17 [2022-03-20 11:39:14,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:39:14,761 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-03-20 11:39:14,761 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 11:39:14,761 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-03-20 11:39:14,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-20 11:39:14,762 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:39:14,763 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] [2022-03-20 11:39:14,792 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 11:39:14,977 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 11:39:14,978 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:39:14,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:39:14,978 INFO L85 PathProgramCache]: Analyzing trace with hash -169450186, now seen corresponding path program 1 times [2022-03-20 11:39:14,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:39:14,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024990984] [2022-03-20 11:39:14,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:39:14,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:39:14,990 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:39:14,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1909322773] [2022-03-20 11:39:14,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:39:14,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:39:14,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:39:14,995 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 11:39:14,997 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 11:39:15,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:39:15,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 11:39:15,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:39:15,193 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 11:39:15,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:39:15,580 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 11:39:15,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:39:15,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024990984] [2022-03-20 11:39:15,580 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:39:15,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909322773] [2022-03-20 11:39:15,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909322773] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 11:39:15,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:39:15,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-03-20 11:39:15,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824745768] [2022-03-20 11:39:15,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 11:39:15,582 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 11:39:15,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:39:15,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 11:39:15,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-20 11:39:15,582 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 11:39:15,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:39:15,668 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2022-03-20 11:39:15,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 11:39:15,668 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-03-20 11:39:15,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:39:15,669 INFO L225 Difference]: With dead ends: 36 [2022-03-20 11:39:15,669 INFO L226 Difference]: Without dead ends: 31 [2022-03-20 11:39:15,670 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 11:39:15,678 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 11:39:15,684 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 76 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 11:39:15,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-20 11:39:15,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-03-20 11:39:15,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 6 states have call successors, (6), 6 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 11:39:15,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2022-03-20 11:39:15,697 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 24 [2022-03-20 11:39:15,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:39:15,698 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2022-03-20 11:39:15,698 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 11:39:15,698 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2022-03-20 11:39:15,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 11:39:15,700 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:39:15,701 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] [2022-03-20 11:39:15,728 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 11:39:15,919 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 11:39:15,920 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:39:15,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:39:15,920 INFO L85 PathProgramCache]: Analyzing trace with hash -434891502, now seen corresponding path program 1 times [2022-03-20 11:39:15,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:39:15,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967735793] [2022-03-20 11:39:15,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:39:15,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:39:15,933 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:39:15,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1122918060] [2022-03-20 11:39:15,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:39:15,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:39:15,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:39:15,936 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 11:39:15,961 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 11:39:15,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:39:15,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 11:39:15,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:39:16,187 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 11:39:16,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:39:16,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:39:16,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967735793] [2022-03-20 11:39:16,392 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:39:16,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122918060] [2022-03-20 11:39:16,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122918060] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:39:16,393 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:39:16,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-03-20 11:39:16,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347636026] [2022-03-20 11:39:16,393 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:39:16,394 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 11:39:16,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:39:16,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 11:39:16,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-20 11:39:16,395 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-20 11:39:16,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:39:16,474 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2022-03-20 11:39:16,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 11:39:16,475 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2022-03-20 11:39:16,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:39:16,476 INFO L225 Difference]: With dead ends: 39 [2022-03-20 11:39:16,476 INFO L226 Difference]: Without dead ends: 34 [2022-03-20 11:39:16,477 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-20 11:39:16,481 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 11:39:16,482 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 129 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 11:39:16,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-20 11:39:16,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-03-20 11:39:16,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 11:39:16,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2022-03-20 11:39:16,491 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 30 [2022-03-20 11:39:16,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:39:16,491 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2022-03-20 11:39:16,491 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-20 11:39:16,491 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2022-03-20 11:39:16,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-20 11:39:16,492 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:39:16,492 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:39:16,511 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 11:39:16,703 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 11:39:16,704 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:39:16,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:39:16,704 INFO L85 PathProgramCache]: Analyzing trace with hash 725792896, now seen corresponding path program 2 times [2022-03-20 11:39:16,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:39:16,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108617214] [2022-03-20 11:39:16,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:39:16,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:39:16,714 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:39:16,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [283378061] [2022-03-20 11:39:16,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 11:39:16,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:39:16,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:39:16,716 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 11:39:16,723 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 11:39:16,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 11:39:16,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:39:16,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 11:39:16,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:39:16,978 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 11:39:16,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:39:17,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:39:17,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108617214] [2022-03-20 11:39:17,121 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:39:17,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283378061] [2022-03-20 11:39:17,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283378061] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:39:17,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:39:17,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-03-20 11:39:17,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089150635] [2022-03-20 11:39:17,122 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:39:17,122 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 11:39:17,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:39:17,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 11:39:17,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-20 11:39:17,123 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 11:39:17,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:39:17,203 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2022-03-20 11:39:17,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 11:39:17,205 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 37 [2022-03-20 11:39:17,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:39:17,205 INFO L225 Difference]: With dead ends: 42 [2022-03-20 11:39:17,205 INFO L226 Difference]: Without dead ends: 37 [2022-03-20 11:39:17,206 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-03-20 11:39:17,206 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 11:39:17,207 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 165 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 11:39:17,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-20 11:39:17,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-03-20 11:39:17,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 11:39:17,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2022-03-20 11:39:17,215 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 37 [2022-03-20 11:39:17,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:39:17,216 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2022-03-20 11:39:17,218 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 11:39:17,218 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2022-03-20 11:39:17,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 11:39:17,220 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:39:17,221 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:39:17,245 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 11:39:17,444 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 11:39:17,444 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:39:17,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:39:17,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1487404370, now seen corresponding path program 3 times [2022-03-20 11:39:17,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:39:17,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725293860] [2022-03-20 11:39:17,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:39:17,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:39:17,455 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:39:17,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1522228473] [2022-03-20 11:39:17,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 11:39:17,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:39:17,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:39:17,458 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 11:39:17,483 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 11:39:17,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-20 11:39:17,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:39:17,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-20 11:39:17,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:39:17,757 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 11:39:17,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:39:17,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:39:17,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725293860] [2022-03-20 11:39:17,881 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:39:17,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522228473] [2022-03-20 11:39:17,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522228473] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:39:17,881 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:39:17,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-03-20 11:39:17,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575359598] [2022-03-20 11:39:17,882 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:39:17,882 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 11:39:17,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:39:17,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 11:39:17,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-20 11:39:17,883 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-20 11:39:17,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:39:17,983 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2022-03-20 11:39:17,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 11:39:17,983 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 44 [2022-03-20 11:39:17,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:39:17,987 INFO L225 Difference]: With dead ends: 45 [2022-03-20 11:39:17,988 INFO L226 Difference]: Without dead ends: 40 [2022-03-20 11:39:17,988 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-03-20 11:39:17,989 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 11:39:17,990 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 205 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 11:39:17,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-20 11:39:17,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-03-20 11:39:17,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 11:39:18,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2022-03-20 11:39:18,002 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 44 [2022-03-20 11:39:18,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:39:18,002 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2022-03-20 11:39:18,004 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-20 11:39:18,004 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2022-03-20 11:39:18,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-20 11:39:18,005 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:39:18,005 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:39:18,013 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 11:39:18,211 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 11:39:18,211 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:39:18,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:39:18,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1178929216, now seen corresponding path program 4 times [2022-03-20 11:39:18,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:39:18,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464008711] [2022-03-20 11:39:18,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:39:18,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:39:18,221 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:39:18,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1269128681] [2022-03-20 11:39:18,221 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 11:39:18,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:39:18,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:39:18,223 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 11:39:18,226 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 11:39:18,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 11:39:18,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:39:18,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 11:39:18,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:39:18,678 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 11:39:18,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:39:18,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:39:18,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464008711] [2022-03-20 11:39:18,854 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:39:18,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269128681] [2022-03-20 11:39:18,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269128681] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:39:18,854 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:39:18,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-20 11:39:18,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481086420] [2022-03-20 11:39:18,854 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:39:18,855 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 11:39:18,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:39:18,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 11:39:18,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-20 11:39:18,856 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-20 11:39:18,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:39:18,975 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2022-03-20 11:39:18,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 11:39:18,976 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 51 [2022-03-20 11:39:18,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:39:18,976 INFO L225 Difference]: With dead ends: 48 [2022-03-20 11:39:18,977 INFO L226 Difference]: Without dead ends: 43 [2022-03-20 11:39:18,977 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-03-20 11:39:18,977 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 2 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 11:39:18,978 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 249 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 11:39:18,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-20 11:39:18,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-03-20 11:39:18,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 10 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 11:39:18,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2022-03-20 11:39:18,984 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 51 [2022-03-20 11:39:18,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:39:18,985 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2022-03-20 11:39:18,985 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-20 11:39:18,985 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2022-03-20 11:39:18,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-20 11:39:18,986 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:39:18,986 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:39:19,009 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 11:39:19,186 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 11:39:19,187 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:39:19,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:39:19,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1658817134, now seen corresponding path program 5 times [2022-03-20 11:39:19,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:39:19,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322065940] [2022-03-20 11:39:19,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:39:19,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:39:19,196 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:39:19,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1040316295] [2022-03-20 11:39:19,196 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 11:39:19,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:39:19,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:39:19,198 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 11:39:19,206 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 11:39:19,337 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-20 11:39:19,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:39:19,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-20 11:39:19,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:39:19,558 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 11:39:19,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:39:19,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:39:19,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322065940] [2022-03-20 11:39:19,697 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:39:19,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040316295] [2022-03-20 11:39:19,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040316295] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:39:19,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:39:19,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-20 11:39:19,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022626546] [2022-03-20 11:39:19,698 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:39:19,698 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 11:39:19,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:39:19,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 11:39:19,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-20 11:39:19,699 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-20 11:39:19,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:39:19,817 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2022-03-20 11:39:19,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 11:39:19,817 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 58 [2022-03-20 11:39:19,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:39:19,818 INFO L225 Difference]: With dead ends: 51 [2022-03-20 11:39:19,818 INFO L226 Difference]: Without dead ends: 46 [2022-03-20 11:39:19,819 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-03-20 11:39:19,819 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 2 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 11:39:19,820 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 297 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 11:39:19,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-20 11:39:19,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-03-20 11:39:19,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 11 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 11:39:19,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2022-03-20 11:39:19,827 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 58 [2022-03-20 11:39:19,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:39:19,827 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2022-03-20 11:39:19,827 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-20 11:39:19,828 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2022-03-20 11:39:19,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-20 11:39:19,828 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:39:19,828 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:39:19,837 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 11:39:20,029 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 11:39:20,029 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:39:20,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:39:20,030 INFO L85 PathProgramCache]: Analyzing trace with hash 270583808, now seen corresponding path program 6 times [2022-03-20 11:39:20,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:39:20,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242104355] [2022-03-20 11:39:20,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:39:20,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:39:20,040 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:39:20,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [13543896] [2022-03-20 11:39:20,040 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 11:39:20,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:39:20,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:39:20,045 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 11:39:20,047 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 11:39:20,224 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 11:39:20,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:39:20,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-20 11:39:20,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:39:20,516 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 14 proven. 63 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-20 11:39:20,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:39:20,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:39:20,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242104355] [2022-03-20 11:39:20,651 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:39:20,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13543896] [2022-03-20 11:39:20,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13543896] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:39:20,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:39:20,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-03-20 11:39:20,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348285322] [2022-03-20 11:39:20,652 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:39:20,652 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 11:39:20,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:39:20,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 11:39:20,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-20 11:39:20,653 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-20 11:39:20,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:39:20,801 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2022-03-20 11:39:20,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 11:39:20,802 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 65 [2022-03-20 11:39:20,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:39:20,802 INFO L225 Difference]: With dead ends: 54 [2022-03-20 11:39:20,803 INFO L226 Difference]: Without dead ends: 49 [2022-03-20 11:39:20,803 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-03-20 11:39:20,803 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 2 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 11:39:20,804 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 349 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 11:39:20,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-03-20 11:39:20,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-03-20 11:39:20,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 12 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 11:39:20,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2022-03-20 11:39:20,810 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 65 [2022-03-20 11:39:20,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:39:20,811 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2022-03-20 11:39:20,811 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-20 11:39:20,811 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2022-03-20 11:39:20,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-20 11:39:20,815 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:39:20,815 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:39:20,824 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 11:39:21,016 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 11:39:21,016 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:39:21,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:39:21,017 INFO L85 PathProgramCache]: Analyzing trace with hash 4292050, now seen corresponding path program 7 times [2022-03-20 11:39:21,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:39:21,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022068214] [2022-03-20 11:39:21,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:39:21,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:39:21,026 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:39:21,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1028415336] [2022-03-20 11:39:21,027 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 11:39:21,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:39:21,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:39:21,028 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 11:39:21,030 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 11:39:21,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:39:21,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-20 11:39:21,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:39:21,706 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 16 proven. 84 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-20 11:39:21,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:39:21,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:39:21,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022068214] [2022-03-20 11:39:21,838 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:39:21,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028415336] [2022-03-20 11:39:21,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028415336] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:39:21,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:39:21,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-03-20 11:39:21,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646465571] [2022-03-20 11:39:21,839 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:39:21,839 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 11:39:21,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:39:21,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 11:39:21,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-03-20 11:39:21,840 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-20 11:39:22,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:39:22,023 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2022-03-20 11:39:22,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 11:39:22,024 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 72 [2022-03-20 11:39:22,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:39:22,024 INFO L225 Difference]: With dead ends: 57 [2022-03-20 11:39:22,025 INFO L226 Difference]: Without dead ends: 52 [2022-03-20 11:39:22,025 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-03-20 11:39:22,025 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 2 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 11:39:22,026 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 405 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 11:39:22,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-20 11:39:22,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-03-20 11:39:22,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 13 states have call successors, (13), 6 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 11:39:22,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2022-03-20 11:39:22,036 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 72 [2022-03-20 11:39:22,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:39:22,036 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2022-03-20 11:39:22,036 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-20 11:39:22,036 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2022-03-20 11:39:22,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-20 11:39:22,037 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:39:22,037 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:39:22,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 11:39:22,243 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 11:39:22,243 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:39:22,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:39:22,244 INFO L85 PathProgramCache]: Analyzing trace with hash 395442112, now seen corresponding path program 8 times [2022-03-20 11:39:22,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:39:22,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209963285] [2022-03-20 11:39:22,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:39:22,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:39:22,253 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:39:22,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [751298772] [2022-03-20 11:39:22,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 11:39:22,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:39:22,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:39:22,255 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 11:39:22,256 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 11:39:22,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 11:39:22,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:39:22,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-20 11:39:22,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:39:23,143 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 18 proven. 108 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-20 11:39:23,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:39:23,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:39:23,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209963285] [2022-03-20 11:39:23,325 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:39:23,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751298772] [2022-03-20 11:39:23,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751298772] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:39:23,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:39:23,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-03-20 11:39:23,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941607228] [2022-03-20 11:39:23,326 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:39:23,326 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 11:39:23,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:39:23,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 11:39:23,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-03-20 11:39:23,327 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-20 11:39:23,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:39:23,522 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2022-03-20 11:39:23,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 11:39:23,522 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 79 [2022-03-20 11:39:23,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:39:23,523 INFO L225 Difference]: With dead ends: 60 [2022-03-20 11:39:23,523 INFO L226 Difference]: Without dead ends: 55 [2022-03-20 11:39:23,523 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-03-20 11:39:23,524 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 2 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 11:39:23,524 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 465 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 11:39:23,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-20 11:39:23,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-03-20 11:39:23,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 14 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 11:39:23,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2022-03-20 11:39:23,531 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 79 [2022-03-20 11:39:23,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:39:23,532 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2022-03-20 11:39:23,532 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-20 11:39:23,532 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2022-03-20 11:39:23,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-20 11:39:23,533 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:39:23,533 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:39:23,541 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 11:39:23,741 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 11:39:23,742 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:39:23,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:39:23,742 INFO L85 PathProgramCache]: Analyzing trace with hash 667883026, now seen corresponding path program 9 times [2022-03-20 11:39:23,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:39:23,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172280543] [2022-03-20 11:39:23,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:39:23,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:39:23,751 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:39:23,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1499927144] [2022-03-20 11:39:23,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 11:39:23,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:39:23,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:39:23,753 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 11:39:23,754 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 11:39:24,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-03-20 11:39:24,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:39:24,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-20 11:39:24,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:39:24,458 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 20 proven. 135 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-03-20 11:39:24,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:39:24,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:39:24,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172280543] [2022-03-20 11:39:24,711 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:39:24,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499927144] [2022-03-20 11:39:24,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499927144] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:39:24,712 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:39:24,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-03-20 11:39:24,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430137622] [2022-03-20 11:39:24,712 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:39:24,712 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 11:39:24,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:39:24,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 11:39:24,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-03-20 11:39:24,713 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 12 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-20 11:39:24,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:39:24,942 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2022-03-20 11:39:24,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 11:39:24,942 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 12 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 86 [2022-03-20 11:39:24,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:39:24,943 INFO L225 Difference]: With dead ends: 63 [2022-03-20 11:39:24,943 INFO L226 Difference]: Without dead ends: 58 [2022-03-20 11:39:24,944 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-03-20 11:39:24,944 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 2 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 11:39:24,944 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 529 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 11:39:24,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-03-20 11:39:24,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-03-20 11:39:24,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 15 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 11:39:24,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2022-03-20 11:39:24,952 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 86 [2022-03-20 11:39:24,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:39:24,953 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2022-03-20 11:39:24,953 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 12 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-20 11:39:24,953 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2022-03-20 11:39:24,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-20 11:39:24,954 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:39:24,954 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:39:24,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 11:39:25,160 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-20 11:39:25,160 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:39:25,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:39:25,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1918146432, now seen corresponding path program 10 times [2022-03-20 11:39:25,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:39:25,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778260463] [2022-03-20 11:39:25,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:39:25,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:39:25,185 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:39:25,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1931319331] [2022-03-20 11:39:25,185 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 11:39:25,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:39:25,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:39:25,188 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:39:25,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 11:39:25,742 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 11:39:25,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:39:25,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-20 11:39:25,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:39:26,083 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 22 proven. 165 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-20 11:39:26,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:39:26,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:39:26,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778260463] [2022-03-20 11:39:26,283 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:39:26,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931319331] [2022-03-20 11:39:26,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931319331] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:39:26,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:39:26,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-20 11:39:26,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514472667] [2022-03-20 11:39:26,283 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:39:26,284 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 11:39:26,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:39:26,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 11:39:26,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-03-20 11:39:26,285 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2022-03-20 11:39:26,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:39:26,527 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2022-03-20 11:39:26,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 11:39:26,528 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) Word has length 93 [2022-03-20 11:39:26,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:39:26,529 INFO L225 Difference]: With dead ends: 66 [2022-03-20 11:39:26,529 INFO L226 Difference]: Without dead ends: 61 [2022-03-20 11:39:26,529 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-03-20 11:39:26,530 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 2 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 11:39:26,530 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 597 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 11:39:26,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-03-20 11:39:26,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-03-20 11:39:26,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 40 states have (on average 1.025) internal successors, (41), 40 states have internal predecessors, (41), 16 states have call successors, (16), 6 states have call predecessors, (16), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 11:39:26,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2022-03-20 11:39:26,538 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 93 [2022-03-20 11:39:26,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:39:26,538 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2022-03-20 11:39:26,538 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2022-03-20 11:39:26,538 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2022-03-20 11:39:26,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-03-20 11:39:26,539 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:39:26,539 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:39:26,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 11:39:26,746 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 11:39:26,746 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:39:26,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:39:26,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1384988242, now seen corresponding path program 11 times [2022-03-20 11:39:26,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:39:26,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698032696] [2022-03-20 11:39:26,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:39:26,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:39:26,765 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:39:26,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1538942763] [2022-03-20 11:39:26,765 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 11:39:26,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:39:26,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:39:26,769 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:39:26,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 11:39:27,406 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-03-20 11:39:27,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:39:27,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-20 11:39:27,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:39:27,871 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 24 proven. 198 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-20 11:39:27,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:39:28,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:39:28,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698032696] [2022-03-20 11:39:28,814 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:39:28,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538942763] [2022-03-20 11:39:28,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538942763] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:39:28,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:39:28,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-03-20 11:39:28,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986684064] [2022-03-20 11:39:28,814 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:39:28,815 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 11:39:28,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:39:28,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 11:39:28,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=685, Unknown=0, NotChecked=0, Total=870 [2022-03-20 11:39:28,816 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 14 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-20 11:39:29,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:39:29,127 INFO L93 Difference]: Finished difference Result 69 states and 80 transitions. [2022-03-20 11:39:29,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 11:39:29,128 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 14 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) Word has length 100 [2022-03-20 11:39:29,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:39:29,128 INFO L225 Difference]: With dead ends: 69 [2022-03-20 11:39:29,129 INFO L226 Difference]: Without dead ends: 64 [2022-03-20 11:39:29,129 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 153 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=195, Invalid=797, Unknown=0, NotChecked=0, Total=992 [2022-03-20 11:39:29,130 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 2 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 11:39:29,130 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 669 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 11:39:29,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-20 11:39:29,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-03-20 11:39:29,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 states have internal predecessors, (43), 17 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 11:39:29,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2022-03-20 11:39:29,138 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 100 [2022-03-20 11:39:29,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:39:29,139 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2022-03-20 11:39:29,139 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 14 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-20 11:39:29,139 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2022-03-20 11:39:29,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-20 11:39:29,140 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:39:29,140 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:39:29,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 11:39:29,340 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-20 11:39:29,341 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:39:29,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:39:29,341 INFO L85 PathProgramCache]: Analyzing trace with hash 2099554112, now seen corresponding path program 12 times [2022-03-20 11:39:29,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:39:29,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979650490] [2022-03-20 11:39:29,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:39:29,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:39:29,349 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:39:29,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2121479993] [2022-03-20 11:39:29,349 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 11:39:29,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:39:29,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:39:29,351 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:39:29,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 11:39:29,583 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-03-20 11:39:29,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:39:29,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-20 11:39:29,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:39:30,199 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 90 proven. 236 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-03-20 11:39:30,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:39:34,431 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (* 6 c_main_~y~0 c_main_~y~0 c_main_~y~0)) (.cse2 (* 13 c_main_~y~0 c_main_~y~0)) (.cse3 (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0))) (or (let ((.cse0 (+ c_main_~y~0 1))) (= (* .cse0 c_main_~k~0) (* .cse0 .cse0))) (not (<= (+ (* c_main_~y~0 c_main_~y~0 c_main_~y~0) c_main_~x~0 1 (* 3 (* c_main_~y~0 c_main_~y~0))) (div (+ .cse1 .cse2 4 .cse3) 4))) (not (= 0 (mod (+ .cse1 .cse2 .cse3) 4))) (< (+ c_main_~c~0 1) c_main_~k~0) (not (< c_main_~c~0 c_main_~k~0)))) is different from false [2022-03-20 11:39:38,491 WARN L833 $PredicateComparison]: unable to prove that (or (= (+ (* c_main_~y~0 c_main_~k~0) c_main_~k~0) (+ (* 2 c_main_~y~0) (* c_main_~y~0 c_main_~y~0) 1)) (<= c_main_~k~0 c_main_~c~0) (not (= 0 (mod (+ (* 6 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 13 c_main_~y~0 c_main_~y~0) (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) 4))) (< (+ c_main_~c~0 1) c_main_~k~0)) is different from false [2022-03-20 11:40:24,877 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 3 c_main_~y~0))) (or (= (+ (* 2 c_main_~y~0) 7 (* .cse0 .cse0)) (+ (* .cse0 c_main_~k~0) c_main_~k~0)) (< (+ c_main_~c~0 4) c_main_~k~0) (not (= (mod (+ (* .cse0 .cse0 .cse0 .cse0) (* .cse0 .cse0 13) (* .cse0 .cse0 .cse0 6)) 4) 0)) (<= c_main_~k~0 (+ 3 c_main_~c~0)))) is different from false [2022-03-20 11:41:02,541 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 5 c_main_~y~0))) (or (< (+ 6 c_main_~c~0) c_main_~k~0) (= (+ (* .cse0 c_main_~k~0) c_main_~k~0) (+ (* 2 c_main_~y~0) (* .cse0 .cse0) 11)) (not (= (mod (+ (* .cse0 .cse0 .cse0 .cse0) (* .cse0 .cse0 13) (* 6 .cse0 .cse0 .cse0)) 4) 0)) (<= c_main_~k~0 (+ 5 c_main_~c~0)))) is different from false [2022-03-20 11:41:10,605 WARN L833 $PredicateComparison]: unable to prove that (or (not (= (mod (let ((.cse0 (+ 6 c_main_~y~0))) (+ (* .cse0 .cse0 .cse0 6) (* .cse0 .cse0 13) (* .cse0 .cse0 .cse0 .cse0))) 4) 0)) (forall ((main_~k~0 Int)) (or (<= main_~k~0 (+ 6 c_main_~c~0)) (< (+ 7 c_main_~c~0) main_~k~0) (= (+ (* 7 main_~k~0) (* main_~k~0 c_main_~y~0)) (+ (* 14 c_main_~y~0) 49 (* c_main_~y~0 c_main_~y~0)))))) is different from false [2022-03-20 11:41:12,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:41:12,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979650490] [2022-03-20 11:41:12,633 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:41:12,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121479993] [2022-03-20 11:41:12,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121479993] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:41:12,633 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:41:12,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-03-20 11:41:12,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104815919] [2022-03-20 11:41:12,635 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:41:12,635 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 11:41:12,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:41:12,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 11:41:12,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=696, Unknown=11, NotChecked=290, Total=1122 [2022-03-20 11:41:12,636 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 19 states have internal predecessors, (42), 15 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-20 11:41:13,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:41:13,081 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2022-03-20 11:41:13,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 11:41:13,082 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 19 states have internal predecessors, (42), 15 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) Word has length 107 [2022-03-20 11:41:13,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:41:13,083 INFO L225 Difference]: With dead ends: 72 [2022-03-20 11:41:13,084 INFO L226 Difference]: Without dead ends: 67 [2022-03-20 11:41:13,086 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 62.2s TimeCoverageRelationStatistics Valid=146, Invalid=855, Unknown=11, NotChecked=320, Total=1332 [2022-03-20 11:41:13,087 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 8 mSDsluCounter, 706 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 11:41:13,087 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 748 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 11:41:13,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-20 11:41:13,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-03-20 11:41:13,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 18 states have call successors, (18), 6 states have call predecessors, (18), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 11:41:13,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2022-03-20 11:41:13,104 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 107 [2022-03-20 11:41:13,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:41:13,104 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2022-03-20 11:41:13,104 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 19 states have internal predecessors, (42), 15 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-20 11:41:13,104 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2022-03-20 11:41:13,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-03-20 11:41:13,106 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:41:13,107 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:41:13,115 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-03-20 11:41:13,312 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:41:13,313 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:41:13,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:41:13,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1740638574, now seen corresponding path program 13 times [2022-03-20 11:41:13,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:41:13,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804614463] [2022-03-20 11:41:13,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:41:13,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:41:13,322 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:41:13,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2121955790] [2022-03-20 11:41:13,322 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 11:41:13,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:41:13,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:41:13,324 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:41:13,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 11:41:14,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:41:14,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-20 11:41:14,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:41:14,681 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 98 proven. 275 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2022-03-20 11:41:14,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:41:44,456 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((main_~k~0 Int)) (or (< (+ c_main_~c~0 1) main_~k~0) (not (< c_main_~c~0 main_~k~0)) (let ((.cse0 (+ c_main_~y~0 1))) (= (* .cse0 .cse0) (* main_~k~0 .cse0))))) (not (= (mod (+ (* (- 6) c_main_~y~0 c_main_~y~0 c_main_~y~0) (* (- 13) c_main_~y~0 c_main_~y~0) (* (- 1) c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) 4) 0))) is different from false [2022-03-20 11:41:44,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:41:44,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804614463] [2022-03-20 11:41:44,458 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:41:44,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121955790] [2022-03-20 11:41:44,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121955790] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:41:44,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:41:44,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-03-20 11:41:44,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301938666] [2022-03-20 11:41:44,458 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:41:44,459 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 11:41:44,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:41:44,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 11:41:44,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=4, NotChecked=52, Total=812 [2022-03-20 11:41:44,459 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 16 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-20 11:41:44,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:41:44,884 INFO L93 Difference]: Finished difference Result 75 states and 88 transitions. [2022-03-20 11:41:44,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 11:41:44,885 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 16 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) Word has length 114 [2022-03-20 11:41:44,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:41:44,885 INFO L225 Difference]: With dead ends: 75 [2022-03-20 11:41:44,886 INFO L226 Difference]: Without dead ends: 70 [2022-03-20 11:41:44,886 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 25.9s TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=4, NotChecked=58, Total=992 [2022-03-20 11:41:44,886 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 8 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 799 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 11:41:44,886 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 799 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 11:41:44,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-20 11:41:44,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-03-20 11:41:44,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 19 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 11:41:44,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 83 transitions. [2022-03-20 11:41:44,895 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 83 transitions. Word has length 114 [2022-03-20 11:41:44,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:41:44,895 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 83 transitions. [2022-03-20 11:41:44,895 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 16 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-20 11:41:44,895 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 83 transitions. [2022-03-20 11:41:44,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-03-20 11:41:44,896 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:41:44,897 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:41:44,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-20 11:41:45,103 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-20 11:41:45,103 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:41:45,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:41:45,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1682036992, now seen corresponding path program 14 times [2022-03-20 11:41:45,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:41:45,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498483806] [2022-03-20 11:41:45,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:41:45,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:41:45,111 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:41:45,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [472866246] [2022-03-20 11:41:45,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 11:41:45,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:41:45,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:41:45,112 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:41:45,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 11:41:45,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 11:41:45,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:41:45,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-20 11:41:45,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:41:46,082 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 30 proven. 315 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-20 11:41:46,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:41:46,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:41:46,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498483806] [2022-03-20 11:41:46,283 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:41:46,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472866246] [2022-03-20 11:41:46,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472866246] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:41:46,284 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:41:46,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-03-20 11:41:46,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853456583] [2022-03-20 11:41:46,284 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:41:46,284 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 11:41:46,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:41:46,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 11:41:46,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-03-20 11:41:46,295 INFO L87 Difference]: Start difference. First operand 70 states and 83 transitions. Second operand has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 17 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2022-03-20 11:41:46,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:41:46,633 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2022-03-20 11:41:46,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 11:41:46,634 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 17 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) Word has length 121 [2022-03-20 11:41:46,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:41:46,635 INFO L225 Difference]: With dead ends: 78 [2022-03-20 11:41:46,635 INFO L226 Difference]: Without dead ends: 73 [2022-03-20 11:41:46,635 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-03-20 11:41:46,635 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 2 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 11:41:46,636 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 909 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 11:41:46,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-20 11:41:46,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-03-20 11:41:46,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 48 states have internal predecessors, (49), 20 states have call successors, (20), 6 states have call predecessors, (20), 4 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-20 11:41:46,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 87 transitions. [2022-03-20 11:41:46,648 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 87 transitions. Word has length 121 [2022-03-20 11:41:46,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:41:46,648 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 87 transitions. [2022-03-20 11:41:46,649 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 17 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2022-03-20 11:41:46,649 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 87 transitions. [2022-03-20 11:41:46,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-03-20 11:41:46,649 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:41:46,650 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:41:46,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-20 11:41:46,850 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-20 11:41:46,850 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:41:46,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:41:46,851 INFO L85 PathProgramCache]: Analyzing trace with hash 699088594, now seen corresponding path program 15 times [2022-03-20 11:41:46,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:41:46,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083231637] [2022-03-20 11:41:46,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:41:46,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:41:46,858 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:41:46,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [131457164] [2022-03-20 11:41:46,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 11:41:46,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:41:46,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:41:46,859 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:41:46,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 11:41:47,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-03-20 11:41:47,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:41:47,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-20 11:41:47,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:41:47,894 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 32 proven. 360 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-20 11:41:47,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:41:49,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:41:49,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083231637] [2022-03-20 11:41:49,057 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:41:49,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131457164] [2022-03-20 11:41:49,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131457164] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:41:49,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:41:49,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-03-20 11:41:49,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039680038] [2022-03-20 11:41:49,057 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:41:49,058 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 11:41:49,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:41:49,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 11:41:49,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=1101, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 11:41:49,059 INFO L87 Difference]: Start difference. First operand 73 states and 87 transitions. Second operand has 21 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 18 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2022-03-20 11:41:49,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:41:49,447 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2022-03-20 11:41:49,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 11:41:49,448 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 18 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) Word has length 128 [2022-03-20 11:41:49,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:41:49,449 INFO L225 Difference]: With dead ends: 81 [2022-03-20 11:41:49,449 INFO L226 Difference]: Without dead ends: 76 [2022-03-20 11:41:49,449 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 201 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=315, Invalid=1245, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 11:41:49,450 INFO L913 BasicCegarLoop]: 67 mSDtfsCounter, 2 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 997 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 11:41:49,450 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 997 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 11:41:49,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-03-20 11:41:49,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2022-03-20 11:41:49,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 21 states have call successors, (21), 6 states have call predecessors, (21), 4 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-20 11:41:49,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 91 transitions. [2022-03-20 11:41:49,459 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 91 transitions. Word has length 128 [2022-03-20 11:41:49,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:41:49,459 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 91 transitions. [2022-03-20 11:41:49,459 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 18 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2022-03-20 11:41:49,460 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 91 transitions. [2022-03-20 11:41:49,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-20 11:41:49,460 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:41:49,460 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:41:49,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-20 11:41:49,670 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-20 11:41:49,670 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:41:49,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:41:49,671 INFO L85 PathProgramCache]: Analyzing trace with hash -119728448, now seen corresponding path program 16 times [2022-03-20 11:41:49,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:41:49,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569857634] [2022-03-20 11:41:49,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:41:49,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:41:49,688 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:41:49,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [551239838] [2022-03-20 11:41:49,688 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 11:41:49,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:41:49,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:41:49,691 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:41:49,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-20 11:41:50,023 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 11:41:50,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:41:50,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 83 conjunts are in the unsatisfiable core [2022-03-20 11:41:50,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:41:50,569 INFO L134 CoverageAnalysis]: Checked inductivity of 986 backedges. 122 proven. 410 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2022-03-20 11:41:50,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:42:23,794 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((main_~k~0 Int)) (or (< (+ c_main_~c~0 1) main_~k~0) (not (< c_main_~c~0 main_~k~0)) (let ((.cse0 (+ c_main_~y~0 1))) (= (* .cse0 .cse0) (* main_~k~0 .cse0))))) (not (= 0 (mod (+ (* 6 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 13 c_main_~y~0 c_main_~y~0) (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) 4)))) is different from false [2022-03-20 11:42:23,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:42:23,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569857634] [2022-03-20 11:42:23,796 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:42:23,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551239838] [2022-03-20 11:42:23,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551239838] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:42:23,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:42:23,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2022-03-20 11:42:23,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861528899] [2022-03-20 11:42:23,796 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:42:23,796 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 11:42:23,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:42:23,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 11:42:23,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=829, Unknown=8, NotChecked=58, Total=992 [2022-03-20 11:42:23,797 INFO L87 Difference]: Start difference. First operand 76 states and 91 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 23 states have internal predecessors, (50), 19 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) [2022-03-20 11:42:24,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:42:24,394 INFO L93 Difference]: Finished difference Result 84 states and 100 transitions. [2022-03-20 11:42:24,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 11:42:24,394 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 23 states have internal predecessors, (50), 19 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) Word has length 135 [2022-03-20 11:42:24,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:42:24,395 INFO L225 Difference]: With dead ends: 84 [2022-03-20 11:42:24,395 INFO L226 Difference]: Without dead ends: 79 [2022-03-20 11:42:24,396 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 29.4s TimeCoverageRelationStatistics Valid=118, Invalid=1000, Unknown=8, NotChecked=64, Total=1190 [2022-03-20 11:42:24,396 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 8 mSDsluCounter, 987 mSDsCounter, 0 mSdLazyCounter, 950 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1037 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 11:42:24,397 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 1037 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 950 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 11:42:24,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-20 11:42:24,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-03-20 11:42:24,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 22 states have call successors, (22), 6 states have call predecessors, (22), 4 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-03-20 11:42:24,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 95 transitions. [2022-03-20 11:42:24,406 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 95 transitions. Word has length 135 [2022-03-20 11:42:24,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:42:24,406 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 95 transitions. [2022-03-20 11:42:24,406 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 23 states have internal predecessors, (50), 19 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) [2022-03-20 11:42:24,406 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 95 transitions. [2022-03-20 11:42:24,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-03-20 11:42:24,407 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:42:24,407 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:42:24,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-20 11:42:24,613 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:42:24,613 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:42:24,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:42:24,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1869408494, now seen corresponding path program 17 times [2022-03-20 11:42:24,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:42:24,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463253980] [2022-03-20 11:42:24,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:42:24,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:42:24,622 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:42:24,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1128375778] [2022-03-20 11:42:24,622 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 11:42:24,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:42:24,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:42:24,624 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:42:24,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-20 11:42:25,776 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2022-03-20 11:42:25,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:42:25,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 76 conjunts are in the unsatisfiable core [2022-03-20 11:42:25,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:42:26,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 36 proven. 459 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-03-20 11:42:26,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:42:26,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:42:26,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463253980] [2022-03-20 11:42:26,415 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:42:26,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128375778] [2022-03-20 11:42:26,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128375778] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:42:26,415 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:42:26,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-03-20 11:42:26,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243774974] [2022-03-20 11:42:26,416 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:42:26,416 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 11:42:26,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:42:26,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 11:42:26,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2022-03-20 11:42:26,417 INFO L87 Difference]: Start difference. First operand 79 states and 95 transitions. Second operand has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 20 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) [2022-03-20 11:42:26,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:42:26,846 INFO L93 Difference]: Finished difference Result 87 states and 104 transitions. [2022-03-20 11:42:26,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 11:42:26,846 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 20 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) Word has length 142 [2022-03-20 11:42:26,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:42:26,847 INFO L225 Difference]: With dead ends: 87 [2022-03-20 11:42:26,847 INFO L226 Difference]: Without dead ends: 82 [2022-03-20 11:42:26,847 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2022-03-20 11:42:26,848 INFO L913 BasicCegarLoop]: 73 mSDtfsCounter, 2 mSDsluCounter, 1112 mSDsCounter, 0 mSdLazyCounter, 805 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1185 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 11:42:26,848 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1185 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 805 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 11:42:26,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-03-20 11:42:26,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-03-20 11:42:26,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 54 states have internal predecessors, (55), 23 states have call successors, (23), 6 states have call predecessors, (23), 4 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-20 11:42:26,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 99 transitions. [2022-03-20 11:42:26,858 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 99 transitions. Word has length 142 [2022-03-20 11:42:26,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:42:26,858 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 99 transitions. [2022-03-20 11:42:26,858 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 20 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) [2022-03-20 11:42:26,858 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 99 transitions. [2022-03-20 11:42:26,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-20 11:42:26,859 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:42:26,859 INFO L499 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:42:26,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-20 11:42:27,068 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:42:27,069 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:42:27,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:42:27,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1178433152, now seen corresponding path program 18 times [2022-03-20 11:42:27,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:42:27,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806251082] [2022-03-20 11:42:27,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:42:27,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:42:27,093 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:42:27,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [951192588] [2022-03-20 11:42:27,094 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 11:42:27,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:42:27,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:42:27,099 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:42:27,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-20 11:42:35,660 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-03-20 11:42:35,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:42:35,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 80 conjunts are in the unsatisfiable core [2022-03-20 11:42:35,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:42:36,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 38 proven. 513 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2022-03-20 11:42:36,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:42:36,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:42:36,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806251082] [2022-03-20 11:42:36,366 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:42:36,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951192588] [2022-03-20 11:42:36,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951192588] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:42:36,366 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:42:36,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2022-03-20 11:42:36,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047162496] [2022-03-20 11:42:36,366 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:42:36,366 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 11:42:36,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:42:36,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 11:42:36,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-03-20 11:42:36,367 INFO L87 Difference]: Start difference. First operand 82 states and 99 transitions. Second operand has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 21 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) [2022-03-20 11:42:36,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:42:36,913 INFO L93 Difference]: Finished difference Result 90 states and 108 transitions. [2022-03-20 11:42:36,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 11:42:36,913 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 21 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) Word has length 149 [2022-03-20 11:42:36,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:42:36,914 INFO L225 Difference]: With dead ends: 90 [2022-03-20 11:42:36,914 INFO L226 Difference]: Without dead ends: 85 [2022-03-20 11:42:36,915 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2022-03-20 11:42:36,916 INFO L913 BasicCegarLoop]: 76 mSDtfsCounter, 2 mSDsluCounter, 1209 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1285 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 11:42:36,916 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1285 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 887 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 11:42:36,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-03-20 11:42:36,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-03-20 11:42:36,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 56 states have internal predecessors, (57), 24 states have call successors, (24), 6 states have call predecessors, (24), 4 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-03-20 11:42:36,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 103 transitions. [2022-03-20 11:42:36,926 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 103 transitions. Word has length 149 [2022-03-20 11:42:36,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:42:36,927 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 103 transitions. [2022-03-20 11:42:36,927 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 21 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) [2022-03-20 11:42:36,927 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 103 transitions. [2022-03-20 11:42:36,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-03-20 11:42:36,928 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:42:36,928 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:42:36,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-20 11:42:37,136 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-03-20 11:42:37,136 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:42:37,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:42:37,137 INFO L85 PathProgramCache]: Analyzing trace with hash -272924846, now seen corresponding path program 19 times [2022-03-20 11:42:37,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:42:37,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087941566] [2022-03-20 11:42:37,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:42:37,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:42:37,144 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:42:37,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [965212401] [2022-03-20 11:42:37,145 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 11:42:37,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:42:37,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:42:37,146 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:42:37,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-20 11:42:37,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:42:37,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 84 conjunts are in the unsatisfiable core [2022-03-20 11:42:37,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:42:38,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 40 proven. 570 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-03-20 11:42:38,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:42:38,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:42:38,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087941566] [2022-03-20 11:42:38,558 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:42:38,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965212401] [2022-03-20 11:42:38,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965212401] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:42:38,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:42:38,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2022-03-20 11:42:38,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305026261] [2022-03-20 11:42:38,558 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:42:38,558 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 11:42:38,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:42:38,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 11:42:38,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2022-03-20 11:42:38,559 INFO L87 Difference]: Start difference. First operand 85 states and 103 transitions. Second operand has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 22 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2022-03-20 11:42:39,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:42:39,152 INFO L93 Difference]: Finished difference Result 93 states and 112 transitions. [2022-03-20 11:42:39,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 11:42:39,154 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 22 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) Word has length 156 [2022-03-20 11:42:39,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:42:39,154 INFO L225 Difference]: With dead ends: 93 [2022-03-20 11:42:39,154 INFO L226 Difference]: Without dead ends: 88 [2022-03-20 11:42:39,155 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2022-03-20 11:42:39,155 INFO L913 BasicCegarLoop]: 79 mSDtfsCounter, 2 mSDsluCounter, 1310 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1389 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 11:42:39,156 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1389 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 973 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 11:42:39,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-20 11:42:39,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-03-20 11:42:39,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 58 states have internal predecessors, (59), 25 states have call successors, (25), 6 states have call predecessors, (25), 4 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-20 11:42:39,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 107 transitions. [2022-03-20 11:42:39,167 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 107 transitions. Word has length 156 [2022-03-20 11:42:39,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:42:39,167 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 107 transitions. [2022-03-20 11:42:39,167 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 22 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2022-03-20 11:42:39,167 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 107 transitions. [2022-03-20 11:42:39,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-03-20 11:42:39,168 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:42:39,168 INFO L499 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:42:39,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-20 11:42:39,375 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-20 11:42:39,375 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:42:39,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:42:39,375 INFO L85 PathProgramCache]: Analyzing trace with hash 2090550848, now seen corresponding path program 20 times [2022-03-20 11:42:39,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:42:39,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859519049] [2022-03-20 11:42:39,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:42:39,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:42:39,384 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:42:39,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [223569559] [2022-03-20 11:42:39,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 11:42:39,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:42:39,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:42:39,386 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:42:39,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-20 11:42:40,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 11:42:40,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:42:40,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 88 conjunts are in the unsatisfiable core [2022-03-20 11:42:40,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:42:40,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 42 proven. 630 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-03-20 11:42:40,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:42:40,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:42:40,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859519049] [2022-03-20 11:42:40,866 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:42:40,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223569559] [2022-03-20 11:42:40,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223569559] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:42:40,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:42:40,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2022-03-20 11:42:40,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208317553] [2022-03-20 11:42:40,867 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:42:40,867 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 11:42:40,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:42:40,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 11:42:40,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2022-03-20 11:42:40,868 INFO L87 Difference]: Start difference. First operand 88 states and 107 transitions. Second operand has 26 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 23 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 22 states have call predecessors, (23), 22 states have call successors, (23) [2022-03-20 11:42:41,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:42:41,505 INFO L93 Difference]: Finished difference Result 96 states and 116 transitions. [2022-03-20 11:42:41,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 11:42:41,505 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 23 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 22 states have call predecessors, (23), 22 states have call successors, (23) Word has length 163 [2022-03-20 11:42:41,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:42:41,506 INFO L225 Difference]: With dead ends: 96 [2022-03-20 11:42:41,506 INFO L226 Difference]: Without dead ends: 91 [2022-03-20 11:42:41,507 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2022-03-20 11:42:41,507 INFO L913 BasicCegarLoop]: 82 mSDtfsCounter, 2 mSDsluCounter, 1415 mSDsCounter, 0 mSdLazyCounter, 1063 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1497 SdHoareTripleChecker+Invalid, 1063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 11:42:41,508 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1497 Invalid, 1063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1063 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 11:42:41,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-03-20 11:42:41,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-03-20 11:42:41,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 states have internal predecessors, (61), 26 states have call successors, (26), 6 states have call predecessors, (26), 4 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-20 11:42:41,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 111 transitions. [2022-03-20 11:42:41,519 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 111 transitions. Word has length 163 [2022-03-20 11:42:41,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:42:41,519 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 111 transitions. [2022-03-20 11:42:41,519 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 23 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 22 states have call predecessors, (23), 22 states have call successors, (23) [2022-03-20 11:42:41,520 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 111 transitions. [2022-03-20 11:42:41,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-03-20 11:42:41,520 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:42:41,521 INFO L499 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:42:41,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-20 11:42:41,729 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:42:41,730 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:42:41,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:42:41,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1122531218, now seen corresponding path program 21 times [2022-03-20 11:42:41,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:42:41,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515345101] [2022-03-20 11:42:41,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:42:41,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:42:41,743 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:42:41,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1656121334] [2022-03-20 11:42:41,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 11:42:41,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:42:41,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:42:41,745 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:42:41,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-20 11:42:43,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2022-03-20 11:42:43,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:42:43,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 92 conjunts are in the unsatisfiable core [2022-03-20 11:42:43,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:42:44,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 44 proven. 693 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2022-03-20 11:42:44,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:42:44,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:42:44,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515345101] [2022-03-20 11:42:44,693 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:42:44,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656121334] [2022-03-20 11:42:44,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656121334] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:42:44,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:42:44,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2022-03-20 11:42:44,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917033299] [2022-03-20 11:42:44,693 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:42:44,694 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-20 11:42:44,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:42:44,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-20 11:42:44,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2022-03-20 11:42:44,695 INFO L87 Difference]: Start difference. First operand 91 states and 111 transitions. Second operand has 27 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 24 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 23 states have call predecessors, (24), 23 states have call successors, (24) [2022-03-20 11:42:45,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:42:45,332 INFO L93 Difference]: Finished difference Result 99 states and 120 transitions. [2022-03-20 11:42:45,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 11:42:45,332 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 24 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 23 states have call predecessors, (24), 23 states have call successors, (24) Word has length 170 [2022-03-20 11:42:45,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:42:45,333 INFO L225 Difference]: With dead ends: 99 [2022-03-20 11:42:45,333 INFO L226 Difference]: Without dead ends: 94 [2022-03-20 11:42:45,334 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 153 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2022-03-20 11:42:45,334 INFO L913 BasicCegarLoop]: 85 mSDtfsCounter, 2 mSDsluCounter, 1524 mSDsCounter, 0 mSdLazyCounter, 1157 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1609 SdHoareTripleChecker+Invalid, 1157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 11:42:45,335 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1609 Invalid, 1157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1157 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 11:42:45,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-03-20 11:42:45,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-03-20 11:42:45,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 62 states have (on average 1.0161290322580645) internal successors, (63), 62 states have internal predecessors, (63), 27 states have call successors, (27), 6 states have call predecessors, (27), 4 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-20 11:42:45,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 115 transitions. [2022-03-20 11:42:45,344 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 115 transitions. Word has length 170 [2022-03-20 11:42:45,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:42:45,345 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 115 transitions. [2022-03-20 11:42:45,345 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 24 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 23 states have call predecessors, (24), 23 states have call successors, (24) [2022-03-20 11:42:45,345 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 115 transitions. [2022-03-20 11:42:45,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-03-20 11:42:45,346 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:42:45,346 INFO L499 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:42:45,355 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-03-20 11:42:45,554 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:42:45,554 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:42:45,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:42:45,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1682799104, now seen corresponding path program 22 times [2022-03-20 11:42:45,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:42:45,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956189996] [2022-03-20 11:42:45,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:42:45,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:42:45,561 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:42:45,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2112605880] [2022-03-20 11:42:45,561 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 11:42:45,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:42:45,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:42:45,562 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:42:45,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-20 11:42:46,110 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 11:42:46,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:42:46,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 96 conjunts are in the unsatisfiable core [2022-03-20 11:42:46,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:42:46,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1817 backedges. 46 proven. 759 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-03-20 11:42:46,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:42:47,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:42:47,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956189996] [2022-03-20 11:42:47,059 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:42:47,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112605880] [2022-03-20 11:42:47,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112605880] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:42:47,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:42:47,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2022-03-20 11:42:47,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517286945] [2022-03-20 11:42:47,059 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:42:47,060 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-20 11:42:47,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:42:47,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-20 11:42:47,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2022-03-20 11:42:47,061 INFO L87 Difference]: Start difference. First operand 94 states and 115 transitions. Second operand has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 25 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) [2022-03-20 11:42:47,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:42:47,755 INFO L93 Difference]: Finished difference Result 102 states and 124 transitions. [2022-03-20 11:42:47,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-20 11:42:47,756 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 25 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) Word has length 177 [2022-03-20 11:42:47,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:42:47,756 INFO L225 Difference]: With dead ends: 102 [2022-03-20 11:42:47,756 INFO L226 Difference]: Without dead ends: 97 [2022-03-20 11:42:47,757 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 11:42:47,757 INFO L913 BasicCegarLoop]: 88 mSDtfsCounter, 2 mSDsluCounter, 1637 mSDsCounter, 0 mSdLazyCounter, 1255 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1725 SdHoareTripleChecker+Invalid, 1255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 11:42:47,757 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1725 Invalid, 1255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1255 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 11:42:47,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-20 11:42:47,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-03-20 11:42:47,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 64 states have (on average 1.015625) internal successors, (65), 64 states have internal predecessors, (65), 28 states have call successors, (28), 6 states have call predecessors, (28), 4 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-20 11:42:47,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 119 transitions. [2022-03-20 11:42:47,778 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 119 transitions. Word has length 177 [2022-03-20 11:42:47,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:42:47,778 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 119 transitions. [2022-03-20 11:42:47,779 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 25 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) [2022-03-20 11:42:47,779 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 119 transitions. [2022-03-20 11:42:47,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-03-20 11:42:47,780 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:42:47,780 INFO L499 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:42:47,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-20 11:42:47,986 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-20 11:42:47,986 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:42:47,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:42:47,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1629618222, now seen corresponding path program 23 times [2022-03-20 11:42:47,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:42:47,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059045945] [2022-03-20 11:42:47,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:42:47,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:42:47,994 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:42:47,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [347268279] [2022-03-20 11:42:47,994 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 11:42:47,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:42:47,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:42:47,996 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:42:47,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-20 11:43:08,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-03-20 11:43:08,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:43:08,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 100 conjunts are in the unsatisfiable core [2022-03-20 11:43:08,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:43:09,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 48 proven. 828 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2022-03-20 11:43:09,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:43:09,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:43:09,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059045945] [2022-03-20 11:43:09,287 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:43:09,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347268279] [2022-03-20 11:43:09,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347268279] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:43:09,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:43:09,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2022-03-20 11:43:09,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961543431] [2022-03-20 11:43:09,287 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:43:09,288 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-20 11:43:09,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:43:09,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-20 11:43:09,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2022-03-20 11:43:09,289 INFO L87 Difference]: Start difference. First operand 97 states and 119 transitions. Second operand has 29 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 26 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 25 states have call predecessors, (26), 25 states have call successors, (26) [2022-03-20 11:43:10,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:43:10,060 INFO L93 Difference]: Finished difference Result 105 states and 128 transitions. [2022-03-20 11:43:10,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 11:43:10,061 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 26 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 25 states have call predecessors, (26), 25 states have call successors, (26) Word has length 184 [2022-03-20 11:43:10,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:43:10,062 INFO L225 Difference]: With dead ends: 105 [2022-03-20 11:43:10,062 INFO L226 Difference]: Without dead ends: 100 [2022-03-20 11:43:10,062 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 165 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=100, Invalid=1022, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 11:43:10,063 INFO L913 BasicCegarLoop]: 91 mSDtfsCounter, 2 mSDsluCounter, 1754 mSDsCounter, 0 mSdLazyCounter, 1357 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1845 SdHoareTripleChecker+Invalid, 1357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 11:43:10,064 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1845 Invalid, 1357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1357 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 11:43:10,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-20 11:43:10,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-03-20 11:43:10,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 66 states have internal predecessors, (67), 29 states have call successors, (29), 6 states have call predecessors, (29), 4 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-20 11:43:10,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 123 transitions. [2022-03-20 11:43:10,077 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 123 transitions. Word has length 184 [2022-03-20 11:43:10,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:43:10,078 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 123 transitions. [2022-03-20 11:43:10,078 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 26 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 25 states have call predecessors, (26), 25 states have call successors, (26) [2022-03-20 11:43:10,078 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 123 transitions. [2022-03-20 11:43:10,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-03-20 11:43:10,079 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:43:10,079 INFO L499 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:43:10,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-20 11:43:10,283 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-20 11:43:10,283 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:43:10,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:43:10,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1782527424, now seen corresponding path program 24 times [2022-03-20 11:43:10,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:43:10,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646175261] [2022-03-20 11:43:10,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:43:10,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:43:10,290 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:43:10,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1360448221] [2022-03-20 11:43:10,291 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 11:43:10,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:43:10,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:43:10,292 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:43:10,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-20 11:43:11,766 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2022-03-20 11:43:11,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:43:11,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 104 conjunts are in the unsatisfiable core [2022-03-20 11:43:11,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:43:12,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2150 backedges. 50 proven. 900 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2022-03-20 11:43:12,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:43:12,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:43:12,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646175261] [2022-03-20 11:43:12,675 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:43:12,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360448221] [2022-03-20 11:43:12,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360448221] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:43:12,675 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:43:12,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2022-03-20 11:43:12,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765093876] [2022-03-20 11:43:12,676 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:43:12,676 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-20 11:43:12,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:43:12,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-20 11:43:12,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 11:43:12,677 INFO L87 Difference]: Start difference. First operand 100 states and 123 transitions. Second operand has 30 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 27 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 26 states have call predecessors, (27), 26 states have call successors, (27) [2022-03-20 11:43:13,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:43:13,468 INFO L93 Difference]: Finished difference Result 108 states and 132 transitions. [2022-03-20 11:43:13,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-20 11:43:13,468 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 27 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 26 states have call predecessors, (27), 26 states have call successors, (27) Word has length 191 [2022-03-20 11:43:13,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:43:13,469 INFO L225 Difference]: With dead ends: 108 [2022-03-20 11:43:13,469 INFO L226 Difference]: Without dead ends: 103 [2022-03-20 11:43:13,469 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=1087, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 11:43:13,470 INFO L913 BasicCegarLoop]: 94 mSDtfsCounter, 2 mSDsluCounter, 1875 mSDsCounter, 0 mSdLazyCounter, 1463 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1969 SdHoareTripleChecker+Invalid, 1463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 11:43:13,470 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1969 Invalid, 1463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1463 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 11:43:13,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-20 11:43:13,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-03-20 11:43:13,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 68 states have internal predecessors, (69), 30 states have call successors, (30), 6 states have call predecessors, (30), 4 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-03-20 11:43:13,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 127 transitions. [2022-03-20 11:43:13,478 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 127 transitions. Word has length 191 [2022-03-20 11:43:13,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:43:13,479 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 127 transitions. [2022-03-20 11:43:13,479 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 27 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 26 states have call predecessors, (27), 26 states have call successors, (27) [2022-03-20 11:43:13,479 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 127 transitions. [2022-03-20 11:43:13,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-03-20 11:43:13,480 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:43:13,480 INFO L499 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:43:13,491 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-03-20 11:43:13,688 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-20 11:43:13,688 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:43:13,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:43:13,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1902123026, now seen corresponding path program 25 times [2022-03-20 11:43:13,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:43:13,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664086781] [2022-03-20 11:43:13,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:43:13,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:43:13,697 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:43:13,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1033668504] [2022-03-20 11:43:13,698 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 11:43:13,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:43:13,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:43:13,699 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:43:13,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-20 11:43:14,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:43:14,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 108 conjunts are in the unsatisfiable core [2022-03-20 11:43:14,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:43:15,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2327 backedges. 52 proven. 975 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2022-03-20 11:43:15,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:43:15,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:43:15,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664086781] [2022-03-20 11:43:15,459 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:43:15,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033668504] [2022-03-20 11:43:15,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033668504] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:43:15,459 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:43:15,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2022-03-20 11:43:15,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408163184] [2022-03-20 11:43:15,459 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:43:15,460 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-20 11:43:15,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:43:15,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-20 11:43:15,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 11:43:15,461 INFO L87 Difference]: Start difference. First operand 103 states and 127 transitions. Second operand has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 28 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 27 states have call predecessors, (28), 27 states have call successors, (28) [2022-03-20 11:43:16,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:43:16,286 INFO L93 Difference]: Finished difference Result 111 states and 136 transitions. [2022-03-20 11:43:16,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-20 11:43:16,287 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 28 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 27 states have call predecessors, (28), 27 states have call successors, (28) Word has length 198 [2022-03-20 11:43:16,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:43:16,288 INFO L225 Difference]: With dead ends: 111 [2022-03-20 11:43:16,288 INFO L226 Difference]: Without dead ends: 106 [2022-03-20 11:43:16,288 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 177 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=1154, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 11:43:16,289 INFO L913 BasicCegarLoop]: 97 mSDtfsCounter, 2 mSDsluCounter, 2000 mSDsCounter, 0 mSdLazyCounter, 1573 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2097 SdHoareTripleChecker+Invalid, 1573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 11:43:16,289 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2097 Invalid, 1573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1573 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 11:43:16,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-03-20 11:43:16,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2022-03-20 11:43:16,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 70 states have (on average 1.0142857142857142) internal successors, (71), 70 states have internal predecessors, (71), 31 states have call successors, (31), 6 states have call predecessors, (31), 4 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-03-20 11:43:16,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 131 transitions. [2022-03-20 11:43:16,301 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 131 transitions. Word has length 198 [2022-03-20 11:43:16,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:43:16,301 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 131 transitions. [2022-03-20 11:43:16,301 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 28 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 27 states have call predecessors, (28), 27 states have call successors, (28) [2022-03-20 11:43:16,302 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 131 transitions. [2022-03-20 11:43:16,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-03-20 11:43:16,303 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:43:16,303 INFO L499 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:43:16,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-20 11:43:16,503 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-20 11:43:16,503 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:43:16,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:43:16,504 INFO L85 PathProgramCache]: Analyzing trace with hash 905794944, now seen corresponding path program 26 times [2022-03-20 11:43:16,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:43:16,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786164209] [2022-03-20 11:43:16,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:43:16,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:43:16,510 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:43:16,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [361998126] [2022-03-20 11:43:16,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 11:43:16,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:43:16,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:43:16,512 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:43:16,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-20 11:43:17,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 11:43:17,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:43:17,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 112 conjunts are in the unsatisfiable core [2022-03-20 11:43:17,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:43:17,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2511 backedges. 54 proven. 1053 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2022-03-20 11:43:17,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:43:18,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:43:18,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786164209] [2022-03-20 11:43:18,128 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:43:18,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361998126] [2022-03-20 11:43:18,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361998126] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:43:18,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:43:18,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2022-03-20 11:43:18,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756560678] [2022-03-20 11:43:18,128 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:43:18,129 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-20 11:43:18,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:43:18,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-20 11:43:18,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 11:43:18,130 INFO L87 Difference]: Start difference. First operand 106 states and 131 transitions. Second operand has 32 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 29 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 28 states have call predecessors, (29), 28 states have call successors, (29) [2022-03-20 11:43:18,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:43:18,992 INFO L93 Difference]: Finished difference Result 114 states and 140 transitions. [2022-03-20 11:43:18,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-20 11:43:18,992 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 29 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 28 states have call predecessors, (29), 28 states have call successors, (29) Word has length 205 [2022-03-20 11:43:18,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:43:18,993 INFO L225 Difference]: With dead ends: 114 [2022-03-20 11:43:18,993 INFO L226 Difference]: Without dead ends: 109 [2022-03-20 11:43:18,993 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 183 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=1223, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 11:43:18,994 INFO L913 BasicCegarLoop]: 100 mSDtfsCounter, 2 mSDsluCounter, 2129 mSDsCounter, 0 mSdLazyCounter, 1687 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2229 SdHoareTripleChecker+Invalid, 1687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 11:43:18,994 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2229 Invalid, 1687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1687 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 11:43:18,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-03-20 11:43:19,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2022-03-20 11:43:19,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 72 states have (on average 1.0138888888888888) internal successors, (73), 72 states have internal predecessors, (73), 32 states have call successors, (32), 6 states have call predecessors, (32), 4 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-03-20 11:43:19,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 135 transitions. [2022-03-20 11:43:19,004 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 135 transitions. Word has length 205 [2022-03-20 11:43:19,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:43:19,004 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 135 transitions. [2022-03-20 11:43:19,004 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 29 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 28 states have call predecessors, (29), 28 states have call successors, (29) [2022-03-20 11:43:19,004 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 135 transitions. [2022-03-20 11:43:19,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-03-20 11:43:19,005 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:43:19,005 INFO L499 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:43:19,012 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-03-20 11:43:19,211 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-20 11:43:19,211 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:43:19,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:43:19,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1053638574, now seen corresponding path program 27 times [2022-03-20 11:43:19,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:43:19,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648647934] [2022-03-20 11:43:19,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:43:19,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:43:19,219 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:43:19,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1186034197] [2022-03-20 11:43:19,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 11:43:19,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:43:19,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:43:19,220 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:43:19,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-20 11:43:20,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2022-03-20 11:43:20,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:43:20,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 116 conjunts are in the unsatisfiable core [2022-03-20 11:43:20,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:43:21,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2702 backedges. 56 proven. 1134 refuted. 0 times theorem prover too weak. 1512 trivial. 0 not checked. [2022-03-20 11:43:21,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:43:21,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:43:21,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648647934] [2022-03-20 11:43:21,869 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:43:21,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186034197] [2022-03-20 11:43:21,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186034197] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:43:21,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:43:21,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2022-03-20 11:43:21,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254866141] [2022-03-20 11:43:21,869 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:43:21,870 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-20 11:43:21,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:43:21,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-20 11:43:21,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 11:43:21,870 INFO L87 Difference]: Start difference. First operand 109 states and 135 transitions. Second operand has 33 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 30 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 29 states have call predecessors, (30), 29 states have call successors, (30) [2022-03-20 11:43:22,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:43:22,797 INFO L93 Difference]: Finished difference Result 117 states and 144 transitions. [2022-03-20 11:43:22,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-20 11:43:22,797 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 30 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 29 states have call predecessors, (30), 29 states have call successors, (30) Word has length 212 [2022-03-20 11:43:22,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:43:22,798 INFO L225 Difference]: With dead ends: 117 [2022-03-20 11:43:22,798 INFO L226 Difference]: Without dead ends: 112 [2022-03-20 11:43:22,799 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 189 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=112, Invalid=1294, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 11:43:22,799 INFO L913 BasicCegarLoop]: 103 mSDtfsCounter, 2 mSDsluCounter, 2262 mSDsCounter, 0 mSdLazyCounter, 1805 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2365 SdHoareTripleChecker+Invalid, 1805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 11:43:22,799 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2365 Invalid, 1805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1805 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 11:43:22,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-03-20 11:43:22,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2022-03-20 11:43:22,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 74 states have (on average 1.0135135135135136) internal successors, (75), 74 states have internal predecessors, (75), 33 states have call successors, (33), 6 states have call predecessors, (33), 4 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-03-20 11:43:22,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 139 transitions. [2022-03-20 11:43:22,813 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 139 transitions. Word has length 212 [2022-03-20 11:43:22,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:43:22,813 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 139 transitions. [2022-03-20 11:43:22,813 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 30 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 29 states have call predecessors, (30), 29 states have call successors, (30) [2022-03-20 11:43:22,813 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 139 transitions. [2022-03-20 11:43:22,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-03-20 11:43:22,814 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:43:22,815 INFO L499 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:43:22,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-20 11:43:23,019 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:43:23,019 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:43:23,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:43:23,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1817647808, now seen corresponding path program 28 times [2022-03-20 11:43:23,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:43:23,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225914774] [2022-03-20 11:43:23,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:43:23,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:43:23,026 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:43:23,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1051582245] [2022-03-20 11:43:23,026 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 11:43:23,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:43:23,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:43:23,028 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:43:23,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-20 11:43:23,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 11:43:23,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:43:23,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 120 conjunts are in the unsatisfiable core [2022-03-20 11:43:23,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:43:24,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2900 backedges. 58 proven. 1218 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2022-03-20 11:43:24,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:43:24,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:43:24,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225914774] [2022-03-20 11:43:24,868 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:43:24,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051582245] [2022-03-20 11:43:24,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051582245] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:43:24,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:43:24,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2022-03-20 11:43:24,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868893469] [2022-03-20 11:43:24,868 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:43:24,869 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-20 11:43:24,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:43:24,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-20 11:43:24,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 11:43:24,870 INFO L87 Difference]: Start difference. First operand 112 states and 139 transitions. Second operand has 34 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 33 states have internal predecessors, (71), 31 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (31), 30 states have call predecessors, (31), 30 states have call successors, (31) [2022-03-20 11:43:25,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:43:25,834 INFO L93 Difference]: Finished difference Result 120 states and 148 transitions. [2022-03-20 11:43:25,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-20 11:43:25,834 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 33 states have internal predecessors, (71), 31 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (31), 30 states have call predecessors, (31), 30 states have call successors, (31) Word has length 219 [2022-03-20 11:43:25,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:43:25,835 INFO L225 Difference]: With dead ends: 120 [2022-03-20 11:43:25,835 INFO L226 Difference]: Without dead ends: 115 [2022-03-20 11:43:25,836 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 195 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=115, Invalid=1367, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 11:43:25,836 INFO L913 BasicCegarLoop]: 106 mSDtfsCounter, 2 mSDsluCounter, 2399 mSDsCounter, 0 mSdLazyCounter, 1927 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2505 SdHoareTripleChecker+Invalid, 1927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 11:43:25,837 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2505 Invalid, 1927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1927 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 11:43:25,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-03-20 11:43:25,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2022-03-20 11:43:25,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 76 states have (on average 1.013157894736842) internal successors, (77), 76 states have internal predecessors, (77), 34 states have call successors, (34), 6 states have call predecessors, (34), 4 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-20 11:43:25,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 143 transitions. [2022-03-20 11:43:25,848 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 143 transitions. Word has length 219 [2022-03-20 11:43:25,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:43:25,848 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 143 transitions. [2022-03-20 11:43:25,849 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 33 states have internal predecessors, (71), 31 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (31), 30 states have call predecessors, (31), 30 states have call successors, (31) [2022-03-20 11:43:25,849 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 143 transitions. [2022-03-20 11:43:25,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-03-20 11:43:25,850 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:43:25,850 INFO L499 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:43:25,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-20 11:43:26,056 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-03-20 11:43:26,057 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:43:26,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:43:26,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1847195794, now seen corresponding path program 29 times [2022-03-20 11:43:26,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:43:26,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433469069] [2022-03-20 11:43:26,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:43:26,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:43:26,064 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:43:26,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [631598546] [2022-03-20 11:43:26,064 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 11:43:26,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:43:26,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:43:26,066 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:43:26,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-20 11:43:34,741 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2022-03-20 11:43:34,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:43:34,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 124 conjunts are in the unsatisfiable core [2022-03-20 11:43:34,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:43:35,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3105 backedges. 60 proven. 1305 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2022-03-20 11:43:35,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:43:35,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:43:35,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433469069] [2022-03-20 11:43:35,856 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:43:35,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631598546] [2022-03-20 11:43:35,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631598546] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:43:35,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:43:35,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2022-03-20 11:43:35,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311715241] [2022-03-20 11:43:35,856 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:43:35,856 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-20 11:43:35,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:43:35,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-20 11:43:35,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 11:43:35,857 INFO L87 Difference]: Start difference. First operand 115 states and 143 transitions. Second operand has 35 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 states have internal predecessors, (73), 32 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 31 states have call predecessors, (32), 31 states have call successors, (32) [2022-03-20 11:43:36,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:43:36,856 INFO L93 Difference]: Finished difference Result 123 states and 152 transitions. [2022-03-20 11:43:36,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-20 11:43:36,856 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 states have internal predecessors, (73), 32 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 31 states have call predecessors, (32), 31 states have call successors, (32) Word has length 226 [2022-03-20 11:43:36,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:43:36,857 INFO L225 Difference]: With dead ends: 123 [2022-03-20 11:43:36,857 INFO L226 Difference]: Without dead ends: 118 [2022-03-20 11:43:36,858 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 201 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=118, Invalid=1442, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 11:43:36,858 INFO L913 BasicCegarLoop]: 109 mSDtfsCounter, 2 mSDsluCounter, 2540 mSDsCounter, 0 mSdLazyCounter, 2053 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2649 SdHoareTripleChecker+Invalid, 2053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 11:43:36,858 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2649 Invalid, 2053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2053 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 11:43:36,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-03-20 11:43:36,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2022-03-20 11:43:36,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 78 states have (on average 1.0128205128205128) internal successors, (79), 78 states have internal predecessors, (79), 35 states have call successors, (35), 6 states have call predecessors, (35), 4 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-03-20 11:43:36,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 147 transitions. [2022-03-20 11:43:36,873 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 147 transitions. Word has length 226 [2022-03-20 11:43:36,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:43:36,874 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 147 transitions. [2022-03-20 11:43:36,874 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 states have internal predecessors, (73), 32 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 31 states have call predecessors, (32), 31 states have call successors, (32) [2022-03-20 11:43:36,874 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 147 transitions. [2022-03-20 11:43:36,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-03-20 11:43:36,875 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:43:36,875 INFO L499 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:43:36,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-20 11:43:37,086 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:43:37,086 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:43:37,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:43:37,086 INFO L85 PathProgramCache]: Analyzing trace with hash 519955712, now seen corresponding path program 30 times [2022-03-20 11:43:37,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:43:37,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749179165] [2022-03-20 11:43:37,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:43:37,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:43:37,097 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:43:37,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1443751176] [2022-03-20 11:43:37,097 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 11:43:37,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:43:37,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:43:37,099 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:43:37,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-20 11:43:47,172 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2022-03-20 11:43:47,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:43:47,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 129 conjunts are in the unsatisfiable core [2022-03-20 11:43:47,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:43:48,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3317 backedges. 62 proven. 1395 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2022-03-20 11:43:48,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:43:51,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:43:51,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749179165] [2022-03-20 11:43:51,299 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:43:51,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443751176] [2022-03-20 11:43:51,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443751176] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:43:51,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:43:51,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2022-03-20 11:43:51,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474649411] [2022-03-20 11:43:51,300 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:43:51,300 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-20 11:43:51,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:43:51,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-20 11:43:51,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=3516, Unknown=0, NotChecked=0, Total=4556 [2022-03-20 11:43:51,302 INFO L87 Difference]: Start difference. First operand 118 states and 147 transitions. Second operand has 36 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 33 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (33), 32 states have call predecessors, (33), 32 states have call successors, (33) [2022-03-20 11:43:52,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:43:52,403 INFO L93 Difference]: Finished difference Result 126 states and 156 transitions. [2022-03-20 11:43:52,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-20 11:43:52,404 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 33 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (33), 32 states have call predecessors, (33), 32 states have call successors, (33) Word has length 233 [2022-03-20 11:43:52,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:43:52,407 INFO L225 Difference]: With dead ends: 126 [2022-03-20 11:43:52,407 INFO L226 Difference]: Without dead ends: 121 [2022-03-20 11:43:52,408 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 381 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1050, Invalid=3780, Unknown=0, NotChecked=0, Total=4830 [2022-03-20 11:43:52,409 INFO L913 BasicCegarLoop]: 112 mSDtfsCounter, 2 mSDsluCounter, 2685 mSDsCounter, 0 mSdLazyCounter, 2183 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2797 SdHoareTripleChecker+Invalid, 2183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 11:43:52,409 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2797 Invalid, 2183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2183 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 11:43:52,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-03-20 11:43:52,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-03-20 11:43:52,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 80 states have (on average 1.0125) internal successors, (81), 80 states have internal predecessors, (81), 36 states have call successors, (36), 6 states have call predecessors, (36), 4 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-03-20 11:43:52,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 151 transitions. [2022-03-20 11:43:52,423 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 151 transitions. Word has length 233 [2022-03-20 11:43:52,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:43:52,424 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 151 transitions. [2022-03-20 11:43:52,424 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 33 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (33), 32 states have call predecessors, (33), 32 states have call successors, (33) [2022-03-20 11:43:52,424 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 151 transitions. [2022-03-20 11:43:52,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2022-03-20 11:43:52,425 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:43:52,425 INFO L499 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:43:52,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-20 11:43:52,635 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:43:52,635 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:43:52,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:43:52,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1893318866, now seen corresponding path program 31 times [2022-03-20 11:43:52,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:43:52,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847027636] [2022-03-20 11:43:52,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:43:52,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:43:52,643 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:43:52,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [362439345] [2022-03-20 11:43:52,643 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 11:43:52,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:43:52,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:43:52,645 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:43:52,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-20 11:43:53,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:43:53,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 132 conjunts are in the unsatisfiable core [2022-03-20 11:43:53,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:43:54,484 INFO L134 CoverageAnalysis]: Checked inductivity of 3536 backedges. 64 proven. 1488 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2022-03-20 11:43:54,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:43:54,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:43:54,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847027636] [2022-03-20 11:43:54,695 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:43:54,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362439345] [2022-03-20 11:43:54,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362439345] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:43:54,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:43:54,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2022-03-20 11:43:54,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823620106] [2022-03-20 11:43:54,695 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:43:54,695 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-20 11:43:54,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:43:54,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-20 11:43:54,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 11:43:54,696 INFO L87 Difference]: Start difference. First operand 121 states and 151 transitions. Second operand has 37 states, 36 states have (on average 2.138888888888889) internal successors, (77), 36 states have internal predecessors, (77), 34 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (34), 33 states have call predecessors, (34), 33 states have call successors, (34) [2022-03-20 11:43:55,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:43:55,874 INFO L93 Difference]: Finished difference Result 129 states and 160 transitions. [2022-03-20 11:43:55,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-20 11:43:55,874 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.138888888888889) internal successors, (77), 36 states have internal predecessors, (77), 34 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (34), 33 states have call predecessors, (34), 33 states have call successors, (34) Word has length 240 [2022-03-20 11:43:55,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:43:55,875 INFO L225 Difference]: With dead ends: 129 [2022-03-20 11:43:55,875 INFO L226 Difference]: Without dead ends: 124 [2022-03-20 11:43:55,876 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 213 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=124, Invalid=1598, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 11:43:55,876 INFO L913 BasicCegarLoop]: 115 mSDtfsCounter, 2 mSDsluCounter, 2834 mSDsCounter, 0 mSdLazyCounter, 2317 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2949 SdHoareTripleChecker+Invalid, 2317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-20 11:43:55,876 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2949 Invalid, 2317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2317 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-20 11:43:55,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-03-20 11:43:55,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-03-20 11:43:55,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 82 states have (on average 1.0121951219512195) internal successors, (83), 82 states have internal predecessors, (83), 37 states have call successors, (37), 6 states have call predecessors, (37), 4 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-03-20 11:43:55,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 155 transitions. [2022-03-20 11:43:55,892 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 155 transitions. Word has length 240 [2022-03-20 11:43:55,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:43:55,892 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 155 transitions. [2022-03-20 11:43:55,893 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.138888888888889) internal successors, (77), 36 states have internal predecessors, (77), 34 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (34), 33 states have call predecessors, (34), 33 states have call successors, (34) [2022-03-20 11:43:55,893 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 155 transitions. [2022-03-20 11:43:55,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-03-20 11:43:55,894 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:43:55,894 INFO L499 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:43:55,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-20 11:43:56,101 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-03-20 11:43:56,101 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:43:56,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:43:56,102 INFO L85 PathProgramCache]: Analyzing trace with hash 985158848, now seen corresponding path program 32 times [2022-03-20 11:43:56,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:43:56,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688071291] [2022-03-20 11:43:56,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:43:56,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:43:56,111 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:43:56,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [848615386] [2022-03-20 11:43:56,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 11:43:56,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:43:56,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:43:56,113 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:43:56,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-20 11:43:57,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 11:43:57,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:43:57,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 137 conjunts are in the unsatisfiable core [2022-03-20 11:43:57,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:43:58,392 INFO L134 CoverageAnalysis]: Checked inductivity of 3762 backedges. 66 proven. 1584 refuted. 0 times theorem prover too weak. 2112 trivial. 0 not checked. [2022-03-20 11:43:58,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:44:02,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:44:02,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688071291] [2022-03-20 11:44:02,022 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:44:02,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848615386] [2022-03-20 11:44:02,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848615386] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:44:02,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:44:02,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2022-03-20 11:44:02,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822376986] [2022-03-20 11:44:02,023 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:44:02,023 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-20 11:44:02,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:44:02,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-20 11:44:02,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1172, Invalid=3940, Unknown=0, NotChecked=0, Total=5112 [2022-03-20 11:44:02,025 INFO L87 Difference]: Start difference. First operand 124 states and 155 transitions. Second operand has 38 states, 37 states have (on average 2.135135135135135) internal successors, (79), 37 states have internal predecessors, (79), 35 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (35), 34 states have call predecessors, (35), 34 states have call successors, (35) [2022-03-20 11:44:03,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:44:03,282 INFO L93 Difference]: Finished difference Result 132 states and 164 transitions. [2022-03-20 11:44:03,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-20 11:44:03,282 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.135135135135135) internal successors, (79), 37 states have internal predecessors, (79), 35 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (35), 34 states have call predecessors, (35), 34 states have call successors, (35) Word has length 247 [2022-03-20 11:44:03,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:44:03,283 INFO L225 Difference]: With dead ends: 132 [2022-03-20 11:44:03,283 INFO L226 Difference]: Without dead ends: 127 [2022-03-20 11:44:03,284 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 405 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1182, Invalid=4220, Unknown=0, NotChecked=0, Total=5402 [2022-03-20 11:44:03,284 INFO L913 BasicCegarLoop]: 118 mSDtfsCounter, 2 mSDsluCounter, 2987 mSDsCounter, 0 mSdLazyCounter, 2455 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3105 SdHoareTripleChecker+Invalid, 2455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-20 11:44:03,285 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3105 Invalid, 2455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2455 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-20 11:44:03,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-03-20 11:44:03,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-03-20 11:44:03,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 84 states have (on average 1.0119047619047619) internal successors, (85), 84 states have internal predecessors, (85), 38 states have call successors, (38), 6 states have call predecessors, (38), 4 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-03-20 11:44:03,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 159 transitions. [2022-03-20 11:44:03,297 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 159 transitions. Word has length 247 [2022-03-20 11:44:03,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:44:03,297 INFO L478 AbstractCegarLoop]: Abstraction has 127 states and 159 transitions. [2022-03-20 11:44:03,297 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.135135135135135) internal successors, (79), 37 states have internal predecessors, (79), 35 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (35), 34 states have call predecessors, (35), 34 states have call successors, (35) [2022-03-20 11:44:03,298 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 159 transitions. [2022-03-20 11:44:03,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2022-03-20 11:44:03,299 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:44:03,299 INFO L499 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:44:03,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-20 11:44:03,506 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-20 11:44:03,507 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:44:03,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:44:03,507 INFO L85 PathProgramCache]: Analyzing trace with hash 456530194, now seen corresponding path program 33 times [2022-03-20 11:44:03,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:44:03,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096856253] [2022-03-20 11:44:03,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:44:03,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:44:03,517 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:44:03,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [461301124] [2022-03-20 11:44:03,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 11:44:03,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:44:03,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:44:03,518 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:44:03,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-20 11:44:05,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2022-03-20 11:44:05,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:44:05,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 140 conjunts are in the unsatisfiable core [2022-03-20 11:44:06,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:44:07,054 INFO L134 CoverageAnalysis]: Checked inductivity of 3995 backedges. 68 proven. 1683 refuted. 0 times theorem prover too weak. 2244 trivial. 0 not checked. [2022-03-20 11:44:07,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:44:07,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:44:07,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096856253] [2022-03-20 11:44:07,338 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:44:07,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461301124] [2022-03-20 11:44:07,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461301124] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:44:07,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:44:07,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2022-03-20 11:44:07,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936580480] [2022-03-20 11:44:07,339 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:44:07,339 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-20 11:44:07,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:44:07,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-20 11:44:07,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 11:44:07,340 INFO L87 Difference]: Start difference. First operand 127 states and 159 transitions. Second operand has 39 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 38 states have internal predecessors, (81), 36 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (36), 35 states have call predecessors, (36), 35 states have call successors, (36) [2022-03-20 11:44:08,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:44:08,577 INFO L93 Difference]: Finished difference Result 135 states and 168 transitions. [2022-03-20 11:44:08,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-20 11:44:08,578 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 38 states have internal predecessors, (81), 36 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (36), 35 states have call predecessors, (36), 35 states have call successors, (36) Word has length 254 [2022-03-20 11:44:08,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:44:08,579 INFO L225 Difference]: With dead ends: 135 [2022-03-20 11:44:08,579 INFO L226 Difference]: Without dead ends: 130 [2022-03-20 11:44:08,579 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 225 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=130, Invalid=1762, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 11:44:08,579 INFO L913 BasicCegarLoop]: 121 mSDtfsCounter, 2 mSDsluCounter, 3144 mSDsCounter, 0 mSdLazyCounter, 2597 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3265 SdHoareTripleChecker+Invalid, 2597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 11:44:08,579 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3265 Invalid, 2597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2597 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-20 11:44:08,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-03-20 11:44:08,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2022-03-20 11:44:08,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 86 states have (on average 1.0116279069767442) internal successors, (87), 86 states have internal predecessors, (87), 39 states have call successors, (39), 6 states have call predecessors, (39), 4 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-20 11:44:08,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 163 transitions. [2022-03-20 11:44:08,594 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 163 transitions. Word has length 254 [2022-03-20 11:44:08,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:44:08,594 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 163 transitions. [2022-03-20 11:44:08,594 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 38 states have internal predecessors, (81), 36 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (36), 35 states have call predecessors, (36), 35 states have call successors, (36) [2022-03-20 11:44:08,594 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 163 transitions. [2022-03-20 11:44:08,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2022-03-20 11:44:08,595 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:44:08,595 INFO L499 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:44:08,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-20 11:44:08,796 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-20 11:44:08,796 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:44:08,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:44:08,796 INFO L85 PathProgramCache]: Analyzing trace with hash -795593600, now seen corresponding path program 34 times [2022-03-20 11:44:08,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:44:08,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336922897] [2022-03-20 11:44:08,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:44:08,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:44:08,803 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:44:08,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1228054174] [2022-03-20 11:44:08,804 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 11:44:08,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:44:08,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:44:08,805 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:44:08,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-20 11:44:09,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 11:44:09,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:44:09,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 144 conjunts are in the unsatisfiable core [2022-03-20 11:44:09,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:44:10,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4235 backedges. 70 proven. 1785 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2022-03-20 11:44:10,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:44:10,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:44:10,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336922897] [2022-03-20 11:44:10,963 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:44:10,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228054174] [2022-03-20 11:44:10,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228054174] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:44:10,963 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:44:10,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2022-03-20 11:44:10,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253840330] [2022-03-20 11:44:10,963 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:44:10,964 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-20 11:44:10,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:44:10,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-20 11:44:10,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 11:44:10,965 INFO L87 Difference]: Start difference. First operand 130 states and 163 transitions. Second operand has 40 states, 39 states have (on average 2.128205128205128) internal successors, (83), 39 states have internal predecessors, (83), 37 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (37), 36 states have call predecessors, (37), 36 states have call successors, (37) [2022-03-20 11:44:12,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:44:12,297 INFO L93 Difference]: Finished difference Result 138 states and 172 transitions. [2022-03-20 11:44:12,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-20 11:44:12,297 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.128205128205128) internal successors, (83), 39 states have internal predecessors, (83), 37 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (37), 36 states have call predecessors, (37), 36 states have call successors, (37) Word has length 261 [2022-03-20 11:44:12,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:44:12,298 INFO L225 Difference]: With dead ends: 138 [2022-03-20 11:44:12,298 INFO L226 Difference]: Without dead ends: 133 [2022-03-20 11:44:12,298 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 231 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=133, Invalid=1847, Unknown=0, NotChecked=0, Total=1980 [2022-03-20 11:44:12,299 INFO L913 BasicCegarLoop]: 124 mSDtfsCounter, 2 mSDsluCounter, 3305 mSDsCounter, 0 mSdLazyCounter, 2743 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3429 SdHoareTripleChecker+Invalid, 2743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-20 11:44:12,299 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3429 Invalid, 2743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2743 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-20 11:44:12,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-03-20 11:44:12,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2022-03-20 11:44:12,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 88 states have (on average 1.0113636363636365) internal successors, (89), 88 states have internal predecessors, (89), 40 states have call successors, (40), 6 states have call predecessors, (40), 4 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-03-20 11:44:12,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 167 transitions. [2022-03-20 11:44:12,313 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 167 transitions. Word has length 261 [2022-03-20 11:44:12,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:44:12,314 INFO L478 AbstractCegarLoop]: Abstraction has 133 states and 167 transitions. [2022-03-20 11:44:12,314 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.128205128205128) internal successors, (83), 39 states have internal predecessors, (83), 37 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (37), 36 states have call predecessors, (37), 36 states have call successors, (37) [2022-03-20 11:44:12,314 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 167 transitions. [2022-03-20 11:44:12,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2022-03-20 11:44:12,315 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:44:12,315 INFO L499 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 36, 36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:44:12,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-20 11:44:12,522 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:44:12,523 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:44:12,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:44:12,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1475543378, now seen corresponding path program 35 times [2022-03-20 11:44:12,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:44:12,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886310221] [2022-03-20 11:44:12,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:44:12,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:44:12,531 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:44:12,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [860076332] [2022-03-20 11:44:12,531 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 11:44:12,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:44:12,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:44:12,532 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:44:12,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-20 11:44:38,865 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2022-03-20 11:44:38,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:44:38,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 148 conjunts are in the unsatisfiable core [2022-03-20 11:44:38,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:44:40,015 INFO L134 CoverageAnalysis]: Checked inductivity of 4482 backedges. 72 proven. 1890 refuted. 0 times theorem prover too weak. 2520 trivial. 0 not checked. [2022-03-20 11:44:40,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:44:40,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:44:40,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886310221] [2022-03-20 11:44:40,281 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:44:40,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860076332] [2022-03-20 11:44:40,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860076332] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:44:40,281 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:44:40,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2022-03-20 11:44:40,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159751740] [2022-03-20 11:44:40,281 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:44:40,282 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-20 11:44:40,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:44:40,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-20 11:44:40,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 11:44:40,283 INFO L87 Difference]: Start difference. First operand 133 states and 167 transitions. Second operand has 41 states, 40 states have (on average 2.125) internal successors, (85), 40 states have internal predecessors, (85), 38 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (38), 37 states have call predecessors, (38), 37 states have call successors, (38) [2022-03-20 11:44:41,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:44:41,672 INFO L93 Difference]: Finished difference Result 141 states and 176 transitions. [2022-03-20 11:44:41,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-20 11:44:41,673 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.125) internal successors, (85), 40 states have internal predecessors, (85), 38 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (38), 37 states have call predecessors, (38), 37 states have call successors, (38) Word has length 268 [2022-03-20 11:44:41,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:44:41,673 INFO L225 Difference]: With dead ends: 141 [2022-03-20 11:44:41,673 INFO L226 Difference]: Without dead ends: 136 [2022-03-20 11:44:41,674 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 237 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=136, Invalid=1934, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 11:44:41,674 INFO L913 BasicCegarLoop]: 127 mSDtfsCounter, 2 mSDsluCounter, 3470 mSDsCounter, 0 mSdLazyCounter, 2893 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3597 SdHoareTripleChecker+Invalid, 2893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-20 11:44:41,674 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3597 Invalid, 2893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2893 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-20 11:44:41,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-03-20 11:44:41,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2022-03-20 11:44:41,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 90 states have (on average 1.011111111111111) internal successors, (91), 90 states have internal predecessors, (91), 41 states have call successors, (41), 6 states have call predecessors, (41), 4 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2022-03-20 11:44:41,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 171 transitions. [2022-03-20 11:44:41,700 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 171 transitions. Word has length 268 [2022-03-20 11:44:41,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:44:41,700 INFO L478 AbstractCegarLoop]: Abstraction has 136 states and 171 transitions. [2022-03-20 11:44:41,700 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.125) internal successors, (85), 40 states have internal predecessors, (85), 38 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (38), 37 states have call predecessors, (38), 37 states have call successors, (38) [2022-03-20 11:44:41,700 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 171 transitions. [2022-03-20 11:44:41,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-03-20 11:44:41,701 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:44:41,702 INFO L499 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 37, 37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:44:41,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-20 11:44:41,917 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-20 11:44:41,917 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:44:41,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:44:41,918 INFO L85 PathProgramCache]: Analyzing trace with hash 290292800, now seen corresponding path program 36 times [2022-03-20 11:44:41,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:44:41,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871020256] [2022-03-20 11:44:41,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:44:41,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:44:41,925 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:44:41,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [35098121] [2022-03-20 11:44:41,925 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 11:44:41,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:44:41,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:44:41,926 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:44:41,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-20 11:45:00,849 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2022-03-20 11:45:00,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:45:00,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 153 conjunts are in the unsatisfiable core [2022-03-20 11:45:00,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:45:02,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4736 backedges. 74 proven. 1998 refuted. 0 times theorem prover too weak. 2664 trivial. 0 not checked. [2022-03-20 11:45:02,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:45:06,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:45:06,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871020256] [2022-03-20 11:45:06,811 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:45:06,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35098121] [2022-03-20 11:45:06,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35098121] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:45:06,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:45:06,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2022-03-20 11:45:06,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762783249] [2022-03-20 11:45:06,811 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:45:06,812 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-20 11:45:06,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:45:06,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-20 11:45:06,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1460, Invalid=4860, Unknown=0, NotChecked=0, Total=6320 [2022-03-20 11:45:06,813 INFO L87 Difference]: Start difference. First operand 136 states and 171 transitions. Second operand has 42 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 41 states have internal predecessors, (87), 39 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (39), 38 states have call predecessors, (39), 38 states have call successors, (39) [2022-03-20 11:45:08,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:45:08,457 INFO L93 Difference]: Finished difference Result 144 states and 180 transitions. [2022-03-20 11:45:08,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-20 11:45:08,457 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 41 states have internal predecessors, (87), 39 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (39), 38 states have call predecessors, (39), 38 states have call successors, (39) Word has length 275 [2022-03-20 11:45:08,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:45:08,466 INFO L225 Difference]: With dead ends: 144 [2022-03-20 11:45:08,466 INFO L226 Difference]: Without dead ends: 139 [2022-03-20 11:45:08,466 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 453 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1470, Invalid=5172, Unknown=0, NotChecked=0, Total=6642 [2022-03-20 11:45:08,467 INFO L913 BasicCegarLoop]: 130 mSDtfsCounter, 2 mSDsluCounter, 3639 mSDsCounter, 0 mSdLazyCounter, 3047 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3769 SdHoareTripleChecker+Invalid, 3047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-20 11:45:08,467 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3769 Invalid, 3047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3047 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-20 11:45:08,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-03-20 11:45:08,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2022-03-20 11:45:08,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 92 states have (on average 1.0108695652173914) internal successors, (93), 92 states have internal predecessors, (93), 42 states have call successors, (42), 6 states have call predecessors, (42), 4 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-03-20 11:45:08,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 175 transitions. [2022-03-20 11:45:08,480 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 175 transitions. Word has length 275 [2022-03-20 11:45:08,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:45:08,480 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 175 transitions. [2022-03-20 11:45:08,481 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 41 states have internal predecessors, (87), 39 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (39), 38 states have call predecessors, (39), 38 states have call successors, (39) [2022-03-20 11:45:08,481 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 175 transitions. [2022-03-20 11:45:08,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2022-03-20 11:45:08,482 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:45:08,482 INFO L499 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 38, 38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:45:08,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-20 11:45:08,696 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-20 11:45:08,696 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:45:08,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:45:08,696 INFO L85 PathProgramCache]: Analyzing trace with hash -355173998, now seen corresponding path program 37 times [2022-03-20 11:45:08,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:45:08,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468772750] [2022-03-20 11:45:08,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:45:08,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:45:08,708 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:45:08,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1774025922] [2022-03-20 11:45:08,708 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 11:45:08,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:45:08,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:45:08,709 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:45:08,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-20 11:45:09,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:45:09,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 156 conjunts are in the unsatisfiable core [2022-03-20 11:45:09,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:45:11,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4997 backedges. 76 proven. 2109 refuted. 0 times theorem prover too weak. 2812 trivial. 0 not checked. [2022-03-20 11:45:11,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:45:11,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:45:11,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468772750] [2022-03-20 11:45:11,441 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:45:11,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774025922] [2022-03-20 11:45:11,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774025922] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:45:11,442 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:45:11,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2022-03-20 11:45:11,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542032377] [2022-03-20 11:45:11,442 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:45:11,442 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-20 11:45:11,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:45:11,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-20 11:45:11,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1938, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 11:45:11,443 INFO L87 Difference]: Start difference. First operand 139 states and 175 transitions. Second operand has 43 states, 42 states have (on average 2.119047619047619) internal successors, (89), 42 states have internal predecessors, (89), 40 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (40), 39 states have call predecessors, (40), 39 states have call successors, (40) [2022-03-20 11:45:12,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:45:12,997 INFO L93 Difference]: Finished difference Result 147 states and 184 transitions. [2022-03-20 11:45:12,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-20 11:45:12,998 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.119047619047619) internal successors, (89), 42 states have internal predecessors, (89), 40 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (40), 39 states have call predecessors, (40), 39 states have call successors, (40) Word has length 282 [2022-03-20 11:45:12,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:45:12,998 INFO L225 Difference]: With dead ends: 147 [2022-03-20 11:45:12,998 INFO L226 Difference]: Without dead ends: 142 [2022-03-20 11:45:12,999 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 249 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=142, Invalid=2114, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 11:45:12,999 INFO L913 BasicCegarLoop]: 133 mSDtfsCounter, 2 mSDsluCounter, 3812 mSDsCounter, 0 mSdLazyCounter, 3205 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3945 SdHoareTripleChecker+Invalid, 3205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-20 11:45:12,999 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3945 Invalid, 3205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3205 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-20 11:45:13,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-03-20 11:45:13,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2022-03-20 11:45:13,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 94 states have (on average 1.0106382978723405) internal successors, (95), 94 states have internal predecessors, (95), 43 states have call successors, (43), 6 states have call predecessors, (43), 4 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2022-03-20 11:45:13,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 179 transitions. [2022-03-20 11:45:13,017 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 179 transitions. Word has length 282 [2022-03-20 11:45:13,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:45:13,018 INFO L478 AbstractCegarLoop]: Abstraction has 142 states and 179 transitions. [2022-03-20 11:45:13,018 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.119047619047619) internal successors, (89), 42 states have internal predecessors, (89), 40 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (40), 39 states have call predecessors, (40), 39 states have call successors, (40) [2022-03-20 11:45:13,018 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 179 transitions. [2022-03-20 11:45:13,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2022-03-20 11:45:13,019 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:45:13,019 INFO L499 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 39, 39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:45:13,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-20 11:45:13,227 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-20 11:45:13,228 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:45:13,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:45:13,228 INFO L85 PathProgramCache]: Analyzing trace with hash 882918400, now seen corresponding path program 38 times [2022-03-20 11:45:13,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:45:13,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003354906] [2022-03-20 11:45:13,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:45:13,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:45:13,235 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:45:13,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1423498200] [2022-03-20 11:45:13,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 11:45:13,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:45:13,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:45:13,237 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:45:13,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-20 11:45:14,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 11:45:14,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:45:14,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 724 conjuncts, 160 conjunts are in the unsatisfiable core [2022-03-20 11:45:14,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:45:15,822 INFO L134 CoverageAnalysis]: Checked inductivity of 5265 backedges. 78 proven. 2223 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked. [2022-03-20 11:45:15,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:45:16,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:45:16,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003354906] [2022-03-20 11:45:16,076 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:45:16,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423498200] [2022-03-20 11:45:16,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423498200] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:45:16,076 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:45:16,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2022-03-20 11:45:16,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697751461] [2022-03-20 11:45:16,076 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:45:16,076 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-20 11:45:16,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:45:16,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-20 11:45:16,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2027, Unknown=0, NotChecked=0, Total=2162 [2022-03-20 11:45:16,077 INFO L87 Difference]: Start difference. First operand 142 states and 179 transitions. Second operand has 44 states, 43 states have (on average 2.116279069767442) internal successors, (91), 43 states have internal predecessors, (91), 41 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (41), 40 states have call predecessors, (41), 40 states have call successors, (41) [2022-03-20 11:45:17,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:45:17,717 INFO L93 Difference]: Finished difference Result 150 states and 188 transitions. [2022-03-20 11:45:17,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-20 11:45:17,717 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.116279069767442) internal successors, (91), 43 states have internal predecessors, (91), 41 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (41), 40 states have call predecessors, (41), 40 states have call successors, (41) Word has length 289 [2022-03-20 11:45:17,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:45:17,718 INFO L225 Difference]: With dead ends: 150 [2022-03-20 11:45:17,718 INFO L226 Difference]: Without dead ends: 145 [2022-03-20 11:45:17,719 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 255 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=145, Invalid=2207, Unknown=0, NotChecked=0, Total=2352 [2022-03-20 11:45:17,719 INFO L913 BasicCegarLoop]: 136 mSDtfsCounter, 2 mSDsluCounter, 3989 mSDsCounter, 0 mSdLazyCounter, 3367 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4125 SdHoareTripleChecker+Invalid, 3367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-20 11:45:17,719 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 4125 Invalid, 3367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3367 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-20 11:45:17,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-03-20 11:45:17,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2022-03-20 11:45:17,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 96 states have (on average 1.0104166666666667) internal successors, (97), 96 states have internal predecessors, (97), 44 states have call successors, (44), 6 states have call predecessors, (44), 4 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2022-03-20 11:45:17,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 183 transitions. [2022-03-20 11:45:17,734 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 183 transitions. Word has length 289 [2022-03-20 11:45:17,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:45:17,734 INFO L478 AbstractCegarLoop]: Abstraction has 145 states and 183 transitions. [2022-03-20 11:45:17,734 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.116279069767442) internal successors, (91), 43 states have internal predecessors, (91), 41 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (41), 40 states have call predecessors, (41), 40 states have call successors, (41) [2022-03-20 11:45:17,734 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 183 transitions. [2022-03-20 11:45:17,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2022-03-20 11:45:17,735 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:45:17,736 INFO L499 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 40, 40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:45:17,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-20 11:45:17,936 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-03-20 11:45:17,936 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:45:17,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:45:17,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1331789358, now seen corresponding path program 39 times [2022-03-20 11:45:17,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:45:17,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356679512] [2022-03-20 11:45:17,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:45:17,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:45:17,944 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:45:17,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [883034968] [2022-03-20 11:45:17,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 11:45:17,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:45:17,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:45:17,945 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:45:17,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-20 11:45:51,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2022-03-20 11:45:51,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:45:51,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 164 conjunts are in the unsatisfiable core [2022-03-20 11:45:51,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:45:52,705 INFO L134 CoverageAnalysis]: Checked inductivity of 5540 backedges. 80 proven. 2340 refuted. 0 times theorem prover too weak. 3120 trivial. 0 not checked. [2022-03-20 11:45:52,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:45:52,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:45:52,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356679512] [2022-03-20 11:45:52,982 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:45:52,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883034968] [2022-03-20 11:45:52,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883034968] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:45:52,982 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:45:52,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2022-03-20 11:45:52,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607185187] [2022-03-20 11:45:52,982 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:45:52,982 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-20 11:45:52,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:45:52,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-20 11:45:52,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2118, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 11:45:52,983 INFO L87 Difference]: Start difference. First operand 145 states and 183 transitions. Second operand has 45 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 44 states have internal predecessors, (93), 42 states have call successors, (44), 2 states have call predecessors, (44), 1 states have return successors, (42), 41 states have call predecessors, (42), 41 states have call successors, (42) [2022-03-20 11:45:54,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:45:54,810 INFO L93 Difference]: Finished difference Result 153 states and 192 transitions. [2022-03-20 11:45:54,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-20 11:45:54,811 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 44 states have internal predecessors, (93), 42 states have call successors, (44), 2 states have call predecessors, (44), 1 states have return successors, (42), 41 states have call predecessors, (42), 41 states have call successors, (42) Word has length 296 [2022-03-20 11:45:54,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:45:54,812 INFO L225 Difference]: With dead ends: 153 [2022-03-20 11:45:54,812 INFO L226 Difference]: Without dead ends: 148 [2022-03-20 11:45:54,812 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 261 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=148, Invalid=2302, Unknown=0, NotChecked=0, Total=2450 [2022-03-20 11:45:54,813 INFO L913 BasicCegarLoop]: 139 mSDtfsCounter, 2 mSDsluCounter, 4170 mSDsCounter, 0 mSdLazyCounter, 3533 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4309 SdHoareTripleChecker+Invalid, 3533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-20 11:45:54,813 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 4309 Invalid, 3533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3533 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-20 11:45:54,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-03-20 11:45:54,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2022-03-20 11:45:54,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 98 states have (on average 1.010204081632653) internal successors, (99), 98 states have internal predecessors, (99), 45 states have call successors, (45), 6 states have call predecessors, (45), 4 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2022-03-20 11:45:54,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 187 transitions. [2022-03-20 11:45:54,829 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 187 transitions. Word has length 296 [2022-03-20 11:45:54,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:45:54,829 INFO L478 AbstractCegarLoop]: Abstraction has 148 states and 187 transitions. [2022-03-20 11:45:54,829 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 44 states have internal predecessors, (93), 42 states have call successors, (44), 2 states have call predecessors, (44), 1 states have return successors, (42), 41 states have call predecessors, (42), 41 states have call successors, (42) [2022-03-20 11:45:54,830 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 187 transitions. [2022-03-20 11:45:54,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2022-03-20 11:45:54,831 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:45:54,831 INFO L499 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 41, 41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:45:54,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-20 11:45:55,047 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:45:55,047 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:45:55,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:45:55,048 INFO L85 PathProgramCache]: Analyzing trace with hash 961049536, now seen corresponding path program 40 times [2022-03-20 11:45:55,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:45:55,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293590907] [2022-03-20 11:45:55,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:45:55,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:45:55,056 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:45:55,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1953343210] [2022-03-20 11:45:55,056 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 11:45:55,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:45:55,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:45:55,057 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:45:55,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-20 11:45:56,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 11:45:56,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:45:56,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 168 conjunts are in the unsatisfiable core [2022-03-20 11:45:56,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:45:57,631 INFO L134 CoverageAnalysis]: Checked inductivity of 5822 backedges. 82 proven. 2460 refuted. 0 times theorem prover too weak. 3280 trivial. 0 not checked. [2022-03-20 11:45:57,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:45:57,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:45:57,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293590907] [2022-03-20 11:45:57,909 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:45:57,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953343210] [2022-03-20 11:45:57,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953343210] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:45:57,909 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:45:57,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2022-03-20 11:45:57,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524638887] [2022-03-20 11:45:57,910 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:45:57,910 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-20 11:45:57,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:45:57,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-20 11:45:57,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2022-03-20 11:45:57,911 INFO L87 Difference]: Start difference. First operand 148 states and 187 transitions. Second operand has 46 states, 45 states have (on average 2.111111111111111) internal successors, (95), 45 states have internal predecessors, (95), 43 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (43), 42 states have call predecessors, (43), 42 states have call successors, (43) [2022-03-20 11:45:59,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:45:59,875 INFO L93 Difference]: Finished difference Result 156 states and 196 transitions. [2022-03-20 11:45:59,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-20 11:45:59,875 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.111111111111111) internal successors, (95), 45 states have internal predecessors, (95), 43 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (43), 42 states have call predecessors, (43), 42 states have call successors, (43) Word has length 303 [2022-03-20 11:45:59,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:45:59,877 INFO L225 Difference]: With dead ends: 156 [2022-03-20 11:45:59,877 INFO L226 Difference]: Without dead ends: 151 [2022-03-20 11:45:59,877 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 267 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=151, Invalid=2399, Unknown=0, NotChecked=0, Total=2550 [2022-03-20 11:45:59,878 INFO L913 BasicCegarLoop]: 142 mSDtfsCounter, 2 mSDsluCounter, 4355 mSDsCounter, 0 mSdLazyCounter, 3703 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4497 SdHoareTripleChecker+Invalid, 3703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-20 11:45:59,878 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 4497 Invalid, 3703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3703 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-20 11:45:59,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-03-20 11:45:59,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2022-03-20 11:45:59,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 100 states have (on average 1.01) internal successors, (101), 100 states have internal predecessors, (101), 46 states have call successors, (46), 6 states have call predecessors, (46), 4 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-03-20 11:45:59,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 191 transitions. [2022-03-20 11:45:59,896 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 191 transitions. Word has length 303 [2022-03-20 11:45:59,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:45:59,896 INFO L478 AbstractCegarLoop]: Abstraction has 151 states and 191 transitions. [2022-03-20 11:45:59,897 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.111111111111111) internal successors, (95), 45 states have internal predecessors, (95), 43 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (43), 42 states have call predecessors, (43), 42 states have call successors, (43) [2022-03-20 11:45:59,897 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 191 transitions. [2022-03-20 11:45:59,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2022-03-20 11:45:59,898 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:45:59,898 INFO L499 BasicCegarLoop]: trace histogram [43, 42, 42, 42, 42, 42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:45:59,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-20 11:46:00,106 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:46:00,107 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:46:00,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:46:00,107 INFO L85 PathProgramCache]: Analyzing trace with hash -552265198, now seen corresponding path program 41 times [2022-03-20 11:46:00,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:46:00,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646671501] [2022-03-20 11:46:00,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:46:00,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:46:00,128 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:46:00,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1848519741] [2022-03-20 11:46:00,128 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 11:46:00,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:46:00,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:46:00,130 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:46:00,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process