/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:33:59,246 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:33:59,248 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:33:59,268 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:33:59,269 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:33:59,271 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:33:59,273 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:33:59,277 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:33:59,279 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:33:59,282 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:33:59,283 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:33:59,284 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:33:59,284 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:33:59,286 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:33:59,287 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:33:59,288 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:33:59,290 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:33:59,291 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:33:59,293 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:33:59,298 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:33:59,301 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:33:59,302 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:33:59,302 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:33:59,304 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:33:59,307 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:33:59,312 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:33:59,312 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:33:59,313 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:33:59,318 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:33:59,334 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:33:59,334 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:33:59,336 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:33:59,336 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:33:59,336 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:33:59,337 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:33:59,337 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:33:59,337 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:33:59,337 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:33:59,337 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:33:59,338 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:33:59,338 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:33:59,338 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:33:59,338 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:33:59,338 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:33:59,338 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:33:59,338 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:33:59,339 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:33:59,339 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:33:59,339 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:33:59,339 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:33:59,340 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:33:59,340 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:33:59,576 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:33:59,591 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:33:59,593 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:33:59,594 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:33:59,594 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:33:59,594 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound5.c [2021-05-02 20:33:59,638 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d65c78e7b/2525fd970b644588b65c3dc344ff1275/FLAG57db1e237 [2021-05-02 20:34:00,009 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:34:00,010 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound5.c [2021-05-02 20:34:00,015 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d65c78e7b/2525fd970b644588b65c3dc344ff1275/FLAG57db1e237 [2021-05-02 20:34:00,030 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d65c78e7b/2525fd970b644588b65c3dc344ff1275 [2021-05-02 20:34:00,032 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:34:00,034 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:34:00,036 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:34:00,036 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:34:00,039 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:34:00,039 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:34:00" (1/1) ... [2021-05-02 20:34:00,040 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ede6193 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:00, skipping insertion in model container [2021-05-02 20:34:00,040 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:34:00" (1/1) ... [2021-05-02 20:34:00,049 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:34:00,064 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:34:00,182 WARN L224 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/egcd3-ll_valuebound5.c[490,503] [2021-05-02 20:34:00,204 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:34:00,209 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:34:00,225 WARN L224 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/egcd3-ll_valuebound5.c[490,503] [2021-05-02 20:34:00,248 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:34:00,263 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:34:00,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:00 WrapperNode [2021-05-02 20:34:00,263 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:34:00,264 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:34:00,264 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:34:00,264 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:34:00,271 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:00" (1/1) ... [2021-05-02 20:34:00,271 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:00" (1/1) ... [2021-05-02 20:34:00,275 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:00" (1/1) ... [2021-05-02 20:34:00,276 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:00" (1/1) ... [2021-05-02 20:34:00,290 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:00" (1/1) ... [2021-05-02 20:34:00,294 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:00" (1/1) ... [2021-05-02 20:34:00,295 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:00" (1/1) ... [2021-05-02 20:34:00,296 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:34:00,297 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:34:00,297 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:34:00,298 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:34:00,299 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:00" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:34:00,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:34:00,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:34:00,367 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:34:00,367 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:34:00,367 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:34:00,367 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:34:00,367 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:34:00,367 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:34:00,367 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:34:00,368 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:34:00,368 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 20:34:00,368 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:34:00,368 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:34:00,368 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:34:00,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:34:00,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:34:00,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:34:00,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:34:00,369 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:34:00,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:34:00,593 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:34:00,593 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-02 20:34:00,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:34:00 BoogieIcfgContainer [2021-05-02 20:34:00,594 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:34:00,594 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:34:00,594 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:34:00,595 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:34:00,597 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:34:00" (1/1) ... [2021-05-02 20:34:00,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:34:00 BasicIcfg [2021-05-02 20:34:00,609 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:34:00,610 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:34:00,610 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:34:00,612 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:34:00,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:34:00" (1/4) ... [2021-05-02 20:34:00,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f38311d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:34:00, skipping insertion in model container [2021-05-02 20:34:00,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:00" (2/4) ... [2021-05-02 20:34:00,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f38311d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:34:00, skipping insertion in model container [2021-05-02 20:34:00,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:34:00" (3/4) ... [2021-05-02 20:34:00,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f38311d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:34:00, skipping insertion in model container [2021-05-02 20:34:00,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:34:00" (4/4) ... [2021-05-02 20:34:00,614 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound5.cJordan [2021-05-02 20:34:00,617 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:34:00,619 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:34:00,629 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:34:00,642 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:34:00,643 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:34:00,643 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:34:00,643 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:34:00,643 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:34:00,643 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:34:00,643 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:34:00,643 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:34:00,653 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 20:34:00,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 20:34:00,658 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:00,658 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:00,658 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:00,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:00,662 INFO L82 PathProgramCache]: Analyzing trace with hash 958536290, now seen corresponding path program 1 times [2021-05-02 20:34:00,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:00,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79106529] [2021-05-02 20:34:00,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:00,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:00,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:34:00,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:00,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:34:00,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:00,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:34:00,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:00,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 20:34:00,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:00,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 20:34:00,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:00,882 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 20:34:00,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:00,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79106529] [2021-05-02 20:34:00,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79106529] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:34:00,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:34:00,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:34:00,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079277655] [2021-05-02 20:34:00,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:34:00,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:00,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:34:00,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:34:00,902 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:34:00,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:00,997 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2021-05-02 20:34:00,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:34:00,999 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 20:34:00,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:01,003 INFO L225 Difference]: With dead ends: 40 [2021-05-02 20:34:01,003 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 20:34:01,005 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:34:01,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 20:34:01,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 20:34:01,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 20:34:01,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2021-05-02 20:34:01,036 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 33 [2021-05-02 20:34:01,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:01,036 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2021-05-02 20:34:01,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:34:01,037 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2021-05-02 20:34:01,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 20:34:01,038 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:01,038 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:01,038 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:34:01,038 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:01,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:01,039 INFO L82 PathProgramCache]: Analyzing trace with hash 641145651, now seen corresponding path program 1 times [2021-05-02 20:34:01,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:01,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922750866] [2021-05-02 20:34:01,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:01,052 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:01,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1066498555] [2021-05-02 20:34:01,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:01,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:01,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:34:01,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:01,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:01,224 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 20:34:01,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:01,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922750866] [2021-05-02 20:34:01,225 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:01,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066498555] [2021-05-02 20:34:01,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066498555] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:34:01,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:34:01,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 20:34:01,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047962288] [2021-05-02 20:34:01,226 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:34:01,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:01,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:34:01,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:34:01,227 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 20:34:01,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:01,286 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2021-05-02 20:34:01,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:34:01,286 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2021-05-02 20:34:01,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:01,287 INFO L225 Difference]: With dead ends: 47 [2021-05-02 20:34:01,287 INFO L226 Difference]: Without dead ends: 47 [2021-05-02 20:34:01,288 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 22.5ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:34:01,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-02 20:34:01,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2021-05-02 20:34:01,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 20:34:01,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-02 20:34:01,293 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 34 [2021-05-02 20:34:01,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:01,294 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-02 20:34:01,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 20:34:01,294 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-02 20:34:01,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 20:34:01,295 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:01,295 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:01,510 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 20:34:01,512 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:01,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:01,513 INFO L82 PathProgramCache]: Analyzing trace with hash 283168444, now seen corresponding path program 1 times [2021-05-02 20:34:01,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:01,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852740837] [2021-05-02 20:34:01,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:01,524 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:01,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1148832533] [2021-05-02 20:34:01,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:01,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:01,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 20:34:01,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:01,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:01,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:01,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:01,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:01,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:01,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:01,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:01,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:01,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:01,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:01,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:01,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:01,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:01,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:01,775 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 20:34:01,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:01,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852740837] [2021-05-02 20:34:01,776 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:01,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148832533] [2021-05-02 20:34:01,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148832533] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:34:01,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:34:01,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:34:01,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914898687] [2021-05-02 20:34:01,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:34:01,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:01,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:34:01,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:34:01,787 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:34:01,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:01,867 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2021-05-02 20:34:01,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:34:01,868 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 37 [2021-05-02 20:34:01,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:01,869 INFO L225 Difference]: With dead ends: 51 [2021-05-02 20:34:01,869 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 20:34:01,869 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 59.4ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:34:01,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 20:34:01,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2021-05-02 20:34:01,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 20:34:01,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2021-05-02 20:34:01,874 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 37 [2021-05-02 20:34:01,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:01,874 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2021-05-02 20:34:01,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:34:01,874 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2021-05-02 20:34:01,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 20:34:01,875 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:01,875 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:02,089 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:02,089 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:02,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:02,090 INFO L82 PathProgramCache]: Analyzing trace with hash 656144812, now seen corresponding path program 1 times [2021-05-02 20:34:02,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:02,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861813251] [2021-05-02 20:34:02,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:02,101 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:02,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1708794258] [2021-05-02 20:34:02,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:02,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:02,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:34:02,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:02,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:02,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:02,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:02,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:02,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:02,242 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 20:34:02,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:02,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861813251] [2021-05-02 20:34:02,243 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:02,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708794258] [2021-05-02 20:34:02,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708794258] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:34:02,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:34:02,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:34:02,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112416528] [2021-05-02 20:34:02,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:34:02,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:02,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:34:02,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:34:02,245 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:34:02,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:02,393 INFO L93 Difference]: Finished difference Result 96 states and 136 transitions. [2021-05-02 20:34:02,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:34:02,394 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2021-05-02 20:34:02,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:02,397 INFO L225 Difference]: With dead ends: 96 [2021-05-02 20:34:02,398 INFO L226 Difference]: Without dead ends: 96 [2021-05-02 20:34:02,398 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 53.7ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:34:02,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-02 20:34:02,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2021-05-02 20:34:02,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 48 states have internal predecessors, (59), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 20:34:02,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2021-05-02 20:34:02,406 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 39 [2021-05-02 20:34:02,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:02,407 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2021-05-02 20:34:02,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:34:02,407 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2021-05-02 20:34:02,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 20:34:02,408 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:02,408 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:02,619 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:02,620 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:02,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:02,620 INFO L82 PathProgramCache]: Analyzing trace with hash -2079765955, now seen corresponding path program 1 times [2021-05-02 20:34:02,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:02,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169142733] [2021-05-02 20:34:02,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:02,630 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:02,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1892237726] [2021-05-02 20:34:02,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:02,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:02,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 20:34:02,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:02,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:02,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:02,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:02,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:02,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:02,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:02,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:02,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:02,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:02,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:02,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:02,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:02,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:02,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:02,850 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:34:02,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:02,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169142733] [2021-05-02 20:34:02,850 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:02,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892237726] [2021-05-02 20:34:02,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892237726] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:34:02,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:34:02,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:34:02,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454751082] [2021-05-02 20:34:02,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:34:02,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:02,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:34:02,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:34:02,852 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 20:34:02,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:02,981 INFO L93 Difference]: Finished difference Result 77 states and 100 transitions. [2021-05-02 20:34:02,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:34:02,981 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2021-05-02 20:34:02,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:02,982 INFO L225 Difference]: With dead ends: 77 [2021-05-02 20:34:02,982 INFO L226 Difference]: Without dead ends: 77 [2021-05-02 20:34:02,982 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 49.8ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:34:02,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-02 20:34:02,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2021-05-02 20:34:02,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.24) internal successors, (62), 51 states have internal predecessors, (62), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 20:34:02,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2021-05-02 20:34:02,987 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 42 [2021-05-02 20:34:02,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:02,987 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2021-05-02 20:34:02,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 20:34:02,987 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2021-05-02 20:34:02,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 20:34:02,988 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:02,988 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:03,192 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:03,193 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:03,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:03,193 INFO L82 PathProgramCache]: Analyzing trace with hash 446575011, now seen corresponding path program 1 times [2021-05-02 20:34:03,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:03,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189923360] [2021-05-02 20:34:03,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:03,205 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:03,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1706228129] [2021-05-02 20:34:03,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:03,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:03,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 20:34:03,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:03,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:03,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:03,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:03,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:03,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:03,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:03,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:03,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:03,439 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:34:03,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:03,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189923360] [2021-05-02 20:34:03,440 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:03,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706228129] [2021-05-02 20:34:03,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706228129] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:34:03,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:34:03,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:34:03,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830879459] [2021-05-02 20:34:03,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:34:03,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:03,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:34:03,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:34:03,441 INFO L87 Difference]: Start difference. First operand 75 states and 98 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:34:03,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:03,581 INFO L93 Difference]: Finished difference Result 109 states and 145 transitions. [2021-05-02 20:34:03,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:34:03,581 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 42 [2021-05-02 20:34:03,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:03,582 INFO L225 Difference]: With dead ends: 109 [2021-05-02 20:34:03,582 INFO L226 Difference]: Without dead ends: 109 [2021-05-02 20:34:03,582 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 54.7ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:34:03,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-02 20:34:03,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2021-05-02 20:34:03,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 71 states have (on average 1.2535211267605635) internal successors, (89), 72 states have internal predecessors, (89), 27 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 20:34:03,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 141 transitions. [2021-05-02 20:34:03,604 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 141 transitions. Word has length 42 [2021-05-02 20:34:03,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:03,605 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 141 transitions. [2021-05-02 20:34:03,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:34:03,605 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 141 transitions. [2021-05-02 20:34:03,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 20:34:03,605 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:03,606 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:03,806 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 20:34:03,806 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:03,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:03,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1977261252, now seen corresponding path program 1 times [2021-05-02 20:34:03,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:03,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492109425] [2021-05-02 20:34:03,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:03,815 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:03,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [769642563] [2021-05-02 20:34:03,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:03,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:03,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 20:34:03,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:03,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:03,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:03,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:03,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:03,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:03,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:03,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:03,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:03,971 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 20:34:03,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:03,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492109425] [2021-05-02 20:34:03,971 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:03,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769642563] [2021-05-02 20:34:03,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769642563] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:34:03,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:34:03,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:34:03,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355686020] [2021-05-02 20:34:03,972 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:34:03,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:03,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:34:03,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:34:03,972 INFO L87 Difference]: Start difference. First operand 105 states and 141 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 20:34:04,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:04,098 INFO L93 Difference]: Finished difference Result 116 states and 156 transitions. [2021-05-02 20:34:04,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:34:04,099 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2021-05-02 20:34:04,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:04,099 INFO L225 Difference]: With dead ends: 116 [2021-05-02 20:34:04,100 INFO L226 Difference]: Without dead ends: 116 [2021-05-02 20:34:04,100 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 45.0ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:34:04,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-02 20:34:04,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2021-05-02 20:34:04,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 76 states have (on average 1.25) internal successors, (95), 77 states have internal predecessors, (95), 31 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-02 20:34:04,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 155 transitions. [2021-05-02 20:34:04,104 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 155 transitions. Word has length 47 [2021-05-02 20:34:04,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:04,105 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 155 transitions. [2021-05-02 20:34:04,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 20:34:04,105 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 155 transitions. [2021-05-02 20:34:04,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 20:34:04,105 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:04,106 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forcibly destroying the process [2021-05-02 20:34:04,306 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:04,306 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:04,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:04,307 INFO L82 PathProgramCache]: Analyzing trace with hash -846684234, now seen corresponding path program 1 times [2021-05-02 20:34:04,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:04,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065809981] [2021-05-02 20:34:04,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:04,314 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:04,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2098356483] [2021-05-02 20:34:04,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:04,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:04,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 20:34:04,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:04,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:04,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:04,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:04,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:04,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:04,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:04,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:04,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:04,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:04,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:04,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:04,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:04,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:04,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:04,575 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:34:04,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:04,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065809981] [2021-05-02 20:34:04,575 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:04,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098356483] [2021-05-02 20:34:04,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098356483] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:34:04,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:34:04,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:34:04,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108748295] [2021-05-02 20:34:04,576 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:34:04,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:04,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:34:04,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:34:04,590 INFO L87 Difference]: Start difference. First operand 115 states and 155 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 20:34:04,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:04,755 INFO L93 Difference]: Finished difference Result 122 states and 161 transitions. [2021-05-02 20:34:04,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:34:04,755 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 47 [2021-05-02 20:34:04,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:04,766 INFO L225 Difference]: With dead ends: 122 [2021-05-02 20:34:04,766 INFO L226 Difference]: Without dead ends: 122 [2021-05-02 20:34:04,770 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 98.8ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:34:04,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-05-02 20:34:04,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 119. [2021-05-02 20:34:04,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 79 states have (on average 1.240506329113924) internal successors, (98), 80 states have internal predecessors, (98), 31 states have call successors, (31), 9 states have call predecessors, (31), 8 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-02 20:34:04,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 158 transitions. [2021-05-02 20:34:04,775 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 158 transitions. Word has length 47 [2021-05-02 20:34:04,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:04,775 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 158 transitions. [2021-05-02 20:34:04,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 20:34:04,775 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 158 transitions. [2021-05-02 20:34:04,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 20:34:04,776 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:04,776 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:04,992 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:04,993 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:04,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:04,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1679656732, now seen corresponding path program 2 times [2021-05-02 20:34:04,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:04,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531871922] [2021-05-02 20:34:04,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:05,002 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:05,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1457661981] [2021-05-02 20:34:05,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:05,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:34:05,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:34:05,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:34:05,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:05,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:05,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:05,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:05,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:05,120 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 20:34:05,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:05,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531871922] [2021-05-02 20:34:05,120 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:05,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457661981] [2021-05-02 20:34:05,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457661981] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:34:05,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:34:05,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:34:05,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132219461] [2021-05-02 20:34:05,121 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:34:05,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:05,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:34:05,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:34:05,122 INFO L87 Difference]: Start difference. First operand 119 states and 158 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 20:34:05,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:05,177 INFO L93 Difference]: Finished difference Result 130 states and 175 transitions. [2021-05-02 20:34:05,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:34:05,179 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 47 [2021-05-02 20:34:05,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:05,180 INFO L225 Difference]: With dead ends: 130 [2021-05-02 20:34:05,180 INFO L226 Difference]: Without dead ends: 130 [2021-05-02 20:34:05,181 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.5ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:34:05,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-05-02 20:34:05,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 104. [2021-05-02 20:34:05,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 68 states have (on average 1.1911764705882353) internal successors, (81), 69 states have internal predecessors, (81), 27 states have call successors, (27), 9 states have call predecessors, (27), 8 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 20:34:05,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 133 transitions. [2021-05-02 20:34:05,185 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 133 transitions. Word has length 47 [2021-05-02 20:34:05,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:05,186 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 133 transitions. [2021-05-02 20:34:05,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 20:34:05,186 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 133 transitions. [2021-05-02 20:34:05,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 20:34:05,186 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:05,186 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:05,405 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 20:34:05,405 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:05,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:05,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1660248707, now seen corresponding path program 1 times [2021-05-02 20:34:05,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:05,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581280123] [2021-05-02 20:34:05,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:05,413 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:05,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [209895121] [2021-05-02 20:34:05,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:05,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:05,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 20:34:05,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:05,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:05,529 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-05-02 20:34:05,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:05,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581280123] [2021-05-02 20:34:05,529 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:05,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209895121] [2021-05-02 20:34:05,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209895121] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:34:05,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:34:05,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:34:05,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413232531] [2021-05-02 20:34:05,530 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:34:05,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:05,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:34:05,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:34:05,530 INFO L87 Difference]: Start difference. First operand 104 states and 133 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-02 20:34:05,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:05,596 INFO L93 Difference]: Finished difference Result 152 states and 209 transitions. [2021-05-02 20:34:05,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:34:05,597 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2021-05-02 20:34:05,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:05,597 INFO L225 Difference]: With dead ends: 152 [2021-05-02 20:34:05,598 INFO L226 Difference]: Without dead ends: 152 [2021-05-02 20:34:05,598 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 25.3ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:34:05,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-05-02 20:34:05,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 133. [2021-05-02 20:34:05,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 76 states have (on average 1.1710526315789473) internal successors, (89), 82 states have internal predecessors, (89), 47 states have call successors, (47), 10 states have call predecessors, (47), 9 states have return successors, (45), 40 states have call predecessors, (45), 45 states have call successors, (45) [2021-05-02 20:34:05,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 181 transitions. [2021-05-02 20:34:05,603 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 181 transitions. Word has length 52 [2021-05-02 20:34:05,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:05,603 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 181 transitions. [2021-05-02 20:34:05,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-02 20:34:05,603 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 181 transitions. [2021-05-02 20:34:05,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 20:34:05,604 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:05,604 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:05,815 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:05,815 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:05,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:05,815 INFO L82 PathProgramCache]: Analyzing trace with hash 846041443, now seen corresponding path program 1 times [2021-05-02 20:34:05,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:05,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356826023] [2021-05-02 20:34:05,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:05,822 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:05,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [525278753] [2021-05-02 20:34:05,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:05,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:05,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 20:34:05,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:05,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:05,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:05,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:05,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:05,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:05,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:05,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:05,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:05,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:05,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:05,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:05,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:05,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:05,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:05,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:06,013 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 20:34:06,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:06,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356826023] [2021-05-02 20:34:06,014 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:06,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525278753] [2021-05-02 20:34:06,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525278753] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:34:06,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:34:06,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:34:06,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824433447] [2021-05-02 20:34:06,014 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:34:06,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:06,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:34:06,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:34:06,015 INFO L87 Difference]: Start difference. First operand 133 states and 181 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 20:34:06,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:06,239 INFO L93 Difference]: Finished difference Result 183 states and 259 transitions. [2021-05-02 20:34:06,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:34:06,240 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 52 [2021-05-02 20:34:06,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:06,242 INFO L225 Difference]: With dead ends: 183 [2021-05-02 20:34:06,242 INFO L226 Difference]: Without dead ends: 183 [2021-05-02 20:34:06,243 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 112.5ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-05-02 20:34:06,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-05-02 20:34:06,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 148. [2021-05-02 20:34:06,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 82 states have (on average 1.170731707317073) internal successors, (96), 89 states have internal predecessors, (96), 55 states have call successors, (55), 11 states have call predecessors, (55), 10 states have return successors, (53), 47 states have call predecessors, (53), 53 states have call successors, (53) [2021-05-02 20:34:06,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 204 transitions. [2021-05-02 20:34:06,256 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 204 transitions. Word has length 52 [2021-05-02 20:34:06,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:06,256 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 204 transitions. [2021-05-02 20:34:06,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 20:34:06,257 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 204 transitions. [2021-05-02 20:34:06,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 20:34:06,258 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:06,258 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:06,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:06,465 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:06,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:06,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1094467600, now seen corresponding path program 1 times [2021-05-02 20:34:06,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:06,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429817119] [2021-05-02 20:34:06,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:06,473 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:06,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1732372420] [2021-05-02 20:34:06,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:06,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:06,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 67 conjunts are in the unsatisfiable core [2021-05-02 20:34:06,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:06,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:06,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:06,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:06,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:06,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:06,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:06,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:06,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:06,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:06,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:06,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:06,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:06,925 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-05-02 20:34:06,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:06,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429817119] [2021-05-02 20:34:06,925 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:06,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732372420] [2021-05-02 20:34:06,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732372420] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:34:06,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:34:06,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 20:34:06,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914494311] [2021-05-02 20:34:06,926 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 20:34:06,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:06,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 20:34:06,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:34:06,926 INFO L87 Difference]: Start difference. First operand 148 states and 204 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 20:34:07,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:07,461 INFO L93 Difference]: Finished difference Result 186 states and 251 transitions. [2021-05-02 20:34:07,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 20:34:07,462 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 64 [2021-05-02 20:34:07,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:07,469 INFO L225 Difference]: With dead ends: 186 [2021-05-02 20:34:07,469 INFO L226 Difference]: Without dead ends: 185 [2021-05-02 20:34:07,469 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 364.9ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-05-02 20:34:07,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-05-02 20:34:07,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 183. [2021-05-02 20:34:07,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 106 states have (on average 1.1603773584905661) internal successors, (123), 113 states have internal predecessors, (123), 63 states have call successors, (63), 14 states have call predecessors, (63), 13 states have return successors, (61), 55 states have call predecessors, (61), 61 states have call successors, (61) [2021-05-02 20:34:07,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 247 transitions. [2021-05-02 20:34:07,475 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 247 transitions. Word has length 64 [2021-05-02 20:34:07,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:07,475 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 247 transitions. [2021-05-02 20:34:07,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 20:34:07,475 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 247 transitions. [2021-05-02 20:34:07,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 20:34:07,476 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:07,476 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:07,692 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 20:34:07,692 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:07,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:07,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1523533001, now seen corresponding path program 2 times [2021-05-02 20:34:07,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:07,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956498255] [2021-05-02 20:34:07,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:07,699 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:07,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1062709223] [2021-05-02 20:34:07,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:07,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:34:07,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:34:07,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 20:34:07,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:07,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:07,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:07,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:07,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:07,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:07,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:07,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:07,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:07,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:07,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:07,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:07,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:07,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:07,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:07,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:07,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:07,863 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-02 20:34:07,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:07,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956498255] [2021-05-02 20:34:07,863 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:07,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062709223] [2021-05-02 20:34:07,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062709223] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:34:07,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:34:07,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:34:07,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300905983] [2021-05-02 20:34:07,864 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:34:07,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:07,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:34:07,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:34:07,864 INFO L87 Difference]: Start difference. First operand 183 states and 247 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-02 20:34:08,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:08,090 INFO L93 Difference]: Finished difference Result 320 states and 476 transitions. [2021-05-02 20:34:08,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 20:34:08,091 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 69 [2021-05-02 20:34:08,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:08,094 INFO L225 Difference]: With dead ends: 320 [2021-05-02 20:34:08,094 INFO L226 Difference]: Without dead ends: 320 [2021-05-02 20:34:08,094 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 98.2ms TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-05-02 20:34:08,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-05-02 20:34:08,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 217. [2021-05-02 20:34:08,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 128 states have (on average 1.1953125) internal successors, (153), 134 states have internal predecessors, (153), 75 states have call successors, (75), 14 states have call predecessors, (75), 13 states have return successors, (73), 68 states have call predecessors, (73), 73 states have call successors, (73) [2021-05-02 20:34:08,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 301 transitions. [2021-05-02 20:34:08,107 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 301 transitions. Word has length 69 [2021-05-02 20:34:08,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:08,108 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 301 transitions. [2021-05-02 20:34:08,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-02 20:34:08,108 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 301 transitions. [2021-05-02 20:34:08,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 20:34:08,108 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:08,109 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:08,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 20:34:08,324 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:08,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:08,325 INFO L82 PathProgramCache]: Analyzing trace with hash 696944608, now seen corresponding path program 1 times [2021-05-02 20:34:08,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:08,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183281009] [2021-05-02 20:34:08,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:08,336 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:08,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1205823604] [2021-05-02 20:34:08,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:08,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:08,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 20:34:08,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:08,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:08,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:08,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:08,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:08,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:08,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:08,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:08,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:08,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:08,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:08,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:08,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:08,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:08,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:08,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:08,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:08,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:08,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:08,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:08,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:08,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:08,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:08,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:08,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:08,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:08,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:08,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:08,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:08,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:08,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:08,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:08,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:08,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:08,585 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-05-02 20:34:08,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:08,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183281009] [2021-05-02 20:34:08,586 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:08,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205823604] [2021-05-02 20:34:08,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205823604] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:34:08,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:34:08,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:34:08,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340088537] [2021-05-02 20:34:08,586 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:34:08,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:08,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:34:08,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:34:08,587 INFO L87 Difference]: Start difference. First operand 217 states and 301 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 20:34:08,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:08,830 INFO L93 Difference]: Finished difference Result 258 states and 362 transitions. [2021-05-02 20:34:08,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:34:08,830 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 74 [2021-05-02 20:34:08,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:08,832 INFO L225 Difference]: With dead ends: 258 [2021-05-02 20:34:08,832 INFO L226 Difference]: Without dead ends: 258 [2021-05-02 20:34:08,833 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 123.2ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-05-02 20:34:08,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-05-02 20:34:08,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 246. [2021-05-02 20:34:08,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 143 states have (on average 1.2027972027972027) internal successors, (172), 149 states have internal predecessors, (172), 87 states have call successors, (87), 16 states have call predecessors, (87), 15 states have return successors, (85), 80 states have call predecessors, (85), 85 states have call successors, (85) [2021-05-02 20:34:08,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 344 transitions. [2021-05-02 20:34:08,853 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 344 transitions. Word has length 74 [2021-05-02 20:34:08,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:08,853 INFO L480 AbstractCegarLoop]: Abstraction has 246 states and 344 transitions. [2021-05-02 20:34:08,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 20:34:08,853 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 344 transitions. [2021-05-02 20:34:08,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 20:34:08,854 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:08,854 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:09,065 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 20:34:09,065 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:09,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:09,065 INFO L82 PathProgramCache]: Analyzing trace with hash -2010106522, now seen corresponding path program 1 times [2021-05-02 20:34:09,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:09,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583869756] [2021-05-02 20:34:09,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:09,076 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:09,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [526144478] [2021-05-02 20:34:09,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:09,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:09,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 20:34:09,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:09,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:09,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:09,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:09,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:09,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:09,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:09,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:09,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:09,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:09,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:09,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:09,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:09,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:09,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:09,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:09,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:09,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:09,478 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-05-02 20:34:09,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:09,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583869756] [2021-05-02 20:34:09,478 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:09,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526144478] [2021-05-02 20:34:09,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526144478] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:34:09,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:34:09,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 20:34:09,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487795363] [2021-05-02 20:34:09,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 20:34:09,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:09,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 20:34:09,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-02 20:34:09,480 INFO L87 Difference]: Start difference. First operand 246 states and 344 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 15 states have internal predecessors, (40), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 20:34:10,493 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-05-02 20:34:10,884 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2021-05-02 20:34:11,092 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-05-02 20:34:12,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:12,015 INFO L93 Difference]: Finished difference Result 380 states and 550 transitions. [2021-05-02 20:34:12,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-02 20:34:12,015 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 15 states have internal predecessors, (40), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 72 [2021-05-02 20:34:12,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:12,017 INFO L225 Difference]: With dead ends: 380 [2021-05-02 20:34:12,017 INFO L226 Difference]: Without dead ends: 380 [2021-05-02 20:34:12,017 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1842.8ms TimeCoverageRelationStatistics Valid=417, Invalid=1935, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 20:34:12,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-05-02 20:34:12,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 355. [2021-05-02 20:34:12,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 202 states have (on average 1.2227722772277227) internal successors, (247), 213 states have internal predecessors, (247), 135 states have call successors, (135), 18 states have call predecessors, (135), 17 states have return successors, (133), 123 states have call predecessors, (133), 133 states have call successors, (133) [2021-05-02 20:34:12,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 515 transitions. [2021-05-02 20:34:12,026 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 515 transitions. Word has length 72 [2021-05-02 20:34:12,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:12,027 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 515 transitions. [2021-05-02 20:34:12,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 15 states have internal predecessors, (40), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 20:34:12,027 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 515 transitions. [2021-05-02 20:34:12,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-02 20:34:12,027 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:12,027 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:12,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:12,241 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:12,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:12,241 INFO L82 PathProgramCache]: Analyzing trace with hash 857620825, now seen corresponding path program 2 times [2021-05-02 20:34:12,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:12,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431845550] [2021-05-02 20:34:12,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:12,246 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:12,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1324472118] [2021-05-02 20:34:12,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:12,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:34:12,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:34:12,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 20:34:12,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:12,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:12,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:12,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:12,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:12,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:12,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:12,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:12,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:12,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:12,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:12,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:12,397 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 20:34:12,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:12,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431845550] [2021-05-02 20:34:12,397 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:12,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324472118] [2021-05-02 20:34:12,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324472118] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:34:12,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:34:12,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:34:12,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960313178] [2021-05-02 20:34:12,398 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:34:12,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:12,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:34:12,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:34:12,399 INFO L87 Difference]: Start difference. First operand 355 states and 515 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-02 20:34:12,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:12,433 INFO L93 Difference]: Finished difference Result 340 states and 471 transitions. [2021-05-02 20:34:12,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:34:12,433 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 77 [2021-05-02 20:34:12,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:12,444 INFO L225 Difference]: With dead ends: 340 [2021-05-02 20:34:12,444 INFO L226 Difference]: Without dead ends: 340 [2021-05-02 20:34:12,444 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 15.0ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:34:12,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-05-02 20:34:12,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 310. [2021-05-02 20:34:12,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 182 states have (on average 1.2142857142857142) internal successors, (221), 183 states have internal predecessors, (221), 111 states have call successors, (111), 17 states have call predecessors, (111), 16 states have return successors, (109), 109 states have call predecessors, (109), 109 states have call successors, (109) [2021-05-02 20:34:12,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 441 transitions. [2021-05-02 20:34:12,453 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 441 transitions. Word has length 77 [2021-05-02 20:34:12,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:12,453 INFO L480 AbstractCegarLoop]: Abstraction has 310 states and 441 transitions. [2021-05-02 20:34:12,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-02 20:34:12,454 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 441 transitions. [2021-05-02 20:34:12,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-02 20:34:12,455 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:12,455 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:12,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 20:34:12,669 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:12,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:12,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1813106047, now seen corresponding path program 3 times [2021-05-02 20:34:12,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:12,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433193061] [2021-05-02 20:34:12,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:12,674 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:12,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [938102180] [2021-05-02 20:34:12,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:12,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 20:34:12,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:34:12,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-02 20:34:12,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:12,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:12,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:12,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:12,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:12,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:12,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:12,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:12,828 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-05-02 20:34:12,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:12,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433193061] [2021-05-02 20:34:12,828 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:12,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938102180] [2021-05-02 20:34:12,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938102180] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:34:12,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:34:12,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 20:34:12,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784129237] [2021-05-02 20:34:12,831 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:34:12,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:12,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:34:12,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:34:12,831 INFO L87 Difference]: Start difference. First operand 310 states and 441 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-05-02 20:34:12,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:12,896 INFO L93 Difference]: Finished difference Result 352 states and 507 transitions. [2021-05-02 20:34:12,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:34:12,896 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 77 [2021-05-02 20:34:12,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:12,897 INFO L225 Difference]: With dead ends: 352 [2021-05-02 20:34:12,897 INFO L226 Difference]: Without dead ends: 352 [2021-05-02 20:34:12,898 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 26.6ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:34:12,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-05-02 20:34:12,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 344. [2021-05-02 20:34:12,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 195 states have (on average 1.2256410256410257) internal successors, (239), 196 states have internal predecessors, (239), 131 states have call successors, (131), 18 states have call predecessors, (131), 17 states have return successors, (129), 129 states have call predecessors, (129), 129 states have call successors, (129) [2021-05-02 20:34:12,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 499 transitions. [2021-05-02 20:34:12,906 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 499 transitions. Word has length 77 [2021-05-02 20:34:12,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:12,906 INFO L480 AbstractCegarLoop]: Abstraction has 344 states and 499 transitions. [2021-05-02 20:34:12,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-05-02 20:34:12,906 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 499 transitions. [2021-05-02 20:34:12,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-02 20:34:12,907 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:12,907 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:13,112 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 20:34:13,113 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:13,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:13,113 INFO L82 PathProgramCache]: Analyzing trace with hash -747783847, now seen corresponding path program 1 times [2021-05-02 20:34:13,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:13,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467615925] [2021-05-02 20:34:13,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:13,118 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:13,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [124572613] [2021-05-02 20:34:13,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:13,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:13,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-02 20:34:13,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:13,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:13,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:13,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:13,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:13,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:13,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:13,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:13,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:13,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:13,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:13,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:13,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:13,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:13,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:13,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:13,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:13,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:13,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:13,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:13,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:13,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:13,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:13,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:13,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:13,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:13,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:13,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:13,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:13,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:13,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:13,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:13,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:13,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:13,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:13,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:13,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:13,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:13,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:13,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:13,407 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-05-02 20:34:13,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:13,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467615925] [2021-05-02 20:34:13,407 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:13,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124572613] [2021-05-02 20:34:13,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124572613] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:34:13,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:34:13,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 20:34:13,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702190473] [2021-05-02 20:34:13,408 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 20:34:13,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:13,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 20:34:13,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:34:13,408 INFO L87 Difference]: Start difference. First operand 344 states and 499 transitions. Second operand has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-05-02 20:34:13,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:13,883 INFO L93 Difference]: Finished difference Result 468 states and 685 transitions. [2021-05-02 20:34:13,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 20:34:13,883 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 79 [2021-05-02 20:34:13,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:13,885 INFO L225 Difference]: With dead ends: 468 [2021-05-02 20:34:13,885 INFO L226 Difference]: Without dead ends: 468 [2021-05-02 20:34:13,885 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 292.5ms TimeCoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2021-05-02 20:34:13,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-05-02 20:34:13,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 373. [2021-05-02 20:34:13,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 210 states have (on average 1.2285714285714286) internal successors, (258), 211 states have internal predecessors, (258), 143 states have call successors, (143), 20 states have call predecessors, (143), 19 states have return successors, (141), 141 states have call predecessors, (141), 141 states have call successors, (141) [2021-05-02 20:34:13,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 542 transitions. [2021-05-02 20:34:13,895 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 542 transitions. Word has length 79 [2021-05-02 20:34:13,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:13,895 INFO L480 AbstractCegarLoop]: Abstraction has 373 states and 542 transitions. [2021-05-02 20:34:13,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-05-02 20:34:13,895 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 542 transitions. [2021-05-02 20:34:13,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-02 20:34:13,896 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:13,896 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:14,109 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 20:34:14,109 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:14,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:14,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1988197843, now seen corresponding path program 4 times [2021-05-02 20:34:14,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:14,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046962816] [2021-05-02 20:34:14,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:14,120 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:14,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [850403538] [2021-05-02 20:34:14,120 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:14,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 20:34:14,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:34:14,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 85 conjunts are in the unsatisfiable core [2021-05-02 20:34:14,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:14,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:14,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:14,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:14,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:14,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:14,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:14,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:14,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:14,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:14,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:14,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:14,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:14,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:14,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:14,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:14,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:14,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:14,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:14,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:14,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:14,847 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-05-02 20:34:14,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:14,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046962816] [2021-05-02 20:34:14,848 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:14,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850403538] [2021-05-02 20:34:14,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850403538] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:34:14,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:34:14,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 20:34:14,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429130130] [2021-05-02 20:34:14,849 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 20:34:14,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:14,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 20:34:14,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-05-02 20:34:14,850 INFO L87 Difference]: Start difference. First operand 373 states and 542 transitions. Second operand has 19 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 6 states have call successors, (12), 1 states have call predecessors, (12), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2021-05-02 20:34:15,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:15,650 INFO L93 Difference]: Finished difference Result 429 states and 619 transitions. [2021-05-02 20:34:15,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 20:34:15,651 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 6 states have call successors, (12), 1 states have call predecessors, (12), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 77 [2021-05-02 20:34:15,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:15,651 INFO L225 Difference]: With dead ends: 429 [2021-05-02 20:34:15,651 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 20:34:15,651 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 701.3ms TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2021-05-02 20:34:15,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 20:34:15,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 20:34:15,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 20:34:15,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 20:34:15,652 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 77 [2021-05-02 20:34:15,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:15,652 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 20:34:15,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 6 states have call successors, (12), 1 states have call predecessors, (12), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2021-05-02 20:34:15,652 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 20:34:15,652 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 20:34:15,865 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:15,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:34:15 BasicIcfg [2021-05-02 20:34:15,868 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 20:34:15,868 INFO L168 Benchmark]: Toolchain (without parser) took 15834.85 ms. Allocated memory was 184.5 MB in the beginning and 291.5 MB in the end (delta: 107.0 MB). Free memory was 148.8 MB in the beginning and 121.9 MB in the end (delta: 26.8 MB). Peak memory consumption was 134.8 MB. Max. memory is 8.0 GB. [2021-05-02 20:34:15,869 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 184.5 MB. Free memory is still 165.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:34:15,869 INFO L168 Benchmark]: CACSL2BoogieTranslator took 227.37 ms. Allocated memory is still 184.5 MB. Free memory was 148.6 MB in the beginning and 166.4 MB in the end (delta: -17.9 MB). Peak memory consumption was 10.4 MB. Max. memory is 8.0 GB. [2021-05-02 20:34:15,869 INFO L168 Benchmark]: Boogie Preprocessor took 32.22 ms. Allocated memory is still 184.5 MB. Free memory was 166.4 MB in the beginning and 165.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 20:34:15,869 INFO L168 Benchmark]: RCFGBuilder took 297.32 ms. Allocated memory is still 184.5 MB. Free memory was 165.0 MB in the beginning and 147.6 MB in the end (delta: 17.4 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-05-02 20:34:15,869 INFO L168 Benchmark]: IcfgTransformer took 14.90 ms. Allocated memory is still 184.5 MB. Free memory was 147.1 MB in the beginning and 146.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:34:15,869 INFO L168 Benchmark]: TraceAbstraction took 15257.92 ms. Allocated memory was 184.5 MB in the beginning and 291.5 MB in the end (delta: 107.0 MB). Free memory was 145.7 MB in the beginning and 121.9 MB in the end (delta: 23.8 MB). Peak memory consumption was 132.4 MB. Max. memory is 8.0 GB. [2021-05-02 20:34:15,869 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 184.5 MB. Free memory is still 165.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 227.37 ms. Allocated memory is still 184.5 MB. Free memory was 148.6 MB in the beginning and 166.4 MB in the end (delta: -17.9 MB). Peak memory consumption was 10.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 32.22 ms. Allocated memory is still 184.5 MB. Free memory was 166.4 MB in the beginning and 165.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 297.32 ms. Allocated memory is still 184.5 MB. Free memory was 165.0 MB in the beginning and 147.6 MB in the end (delta: 17.4 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * IcfgTransformer took 14.90 ms. Allocated memory is still 184.5 MB. Free memory was 147.1 MB in the beginning and 146.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 15257.92 ms. Allocated memory was 184.5 MB in the beginning and 291.5 MB in the end (delta: 107.0 MB). Free memory was 145.7 MB in the beginning and 121.9 MB in the end (delta: 23.8 MB). Peak memory consumption was 132.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 15224.0ms, OverallIterations: 19, TraceHistogramMax: 8, EmptinessCheckTime: 20.9ms, AutomataDifference: 6318.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 920 SDtfs, 996 SDslu, 4398 SDs, 0 SdLazy, 4476 SolverSat, 897 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2711.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1139 GetRequests, 878 SyntacticMatches, 2 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 4036.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=373occurred in iteration=18, InterpolantAutomatonStates: 224, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 164.6ms AutomataMinimizationTime, 19 MinimizatonAttempts, 401 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 153.0ms SsaConstructionTime, 425.5ms SatisfiabilityAnalysisTime, 3650.3ms InterpolantComputationTime, 1061 NumberOfCodeBlocks, 1017 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 1042 ConstructedInterpolants, 0 QuantifiedInterpolants, 5640 SizeOfPredicates, 104 NumberOfNonLiveVariables, 3466 ConjunctsInSsa, 482 ConjunctsInUnsatCore, 19 InterpolantComputations, 5 PerfectInterpolantSequences, 905/1105 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...