/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/egcd2-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:21:23,178 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:21:23,189 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:21:23,257 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:21:23,257 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:21:23,260 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:21:23,262 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:21:23,267 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:21:23,269 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:21:23,272 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:21:23,273 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:21:23,274 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:21:23,275 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:21:23,276 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:21:23,278 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:21:23,279 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:21:23,281 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:21:23,282 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:21:23,284 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:21:23,304 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:21:23,305 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:21:23,306 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:21:23,309 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:21:23,310 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:21:23,316 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:21:23,324 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:21:23,324 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:21:23,325 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:21:23,328 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:21:23,357 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:21:23,357 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:21:23,360 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:21:23,360 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:21:23,360 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:21:23,360 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:21:23,361 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:21:23,361 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:21:23,361 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:21:23,361 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:21:23,362 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:21:23,362 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:21:23,362 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:21:23,363 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:21:23,363 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:21:23,363 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:21:23,363 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:21:23,363 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:21:23,363 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:21:23,364 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:21:23,364 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:21:23,365 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:21:23,365 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:21:23,944 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:21:23,993 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:21:23,995 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:21:23,996 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:21:23,996 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:21:23,997 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound5.c [2021-05-02 20:21:24,100 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d7c18a58/fd7fa61c24d54c10a4a55ed2464f0c94/FLAG69e2f2506 [2021-05-02 20:21:24,675 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:21:24,675 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound5.c [2021-05-02 20:21:24,682 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d7c18a58/fd7fa61c24d54c10a4a55ed2464f0c94/FLAG69e2f2506 [2021-05-02 20:21:25,066 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d7c18a58/fd7fa61c24d54c10a4a55ed2464f0c94 [2021-05-02 20:21:25,069 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:21:25,070 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:21:25,071 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:21:25,071 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:21:25,090 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:21:25,090 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:21:25" (1/1) ... [2021-05-02 20:21:25,091 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56b3a795 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:21:25, skipping insertion in model container [2021-05-02 20:21:25,091 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:21:25" (1/1) ... [2021-05-02 20:21:25,097 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:21:25,115 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:21:25,216 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/egcd2-ll_unwindbound5.c[490,503] [2021-05-02 20:21:25,232 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:21:25,239 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:21:25,248 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/egcd2-ll_unwindbound5.c[490,503] [2021-05-02 20:21:25,256 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:21:25,304 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:21:25,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:21:25 WrapperNode [2021-05-02 20:21:25,305 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:21:25,306 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:21:25,306 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:21:25,306 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:21:25,314 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:21:25" (1/1) ... [2021-05-02 20:21:25,315 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:21:25" (1/1) ... [2021-05-02 20:21:25,319 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:21:25" (1/1) ... [2021-05-02 20:21:25,319 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:21:25" (1/1) ... [2021-05-02 20:21:25,324 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:21:25" (1/1) ... [2021-05-02 20:21:25,327 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:21:25" (1/1) ... [2021-05-02 20:21:25,328 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:21:25" (1/1) ... [2021-05-02 20:21:25,330 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:21:25,331 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:21:25,331 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:21:25,331 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:21:25,331 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:21:25" (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 20:21:25,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:21:25,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:21:25,393 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:21:25,393 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:21:25,393 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:21:25,393 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:21:25,393 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:21:25,393 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:21:25,393 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:21:25,394 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:21:25,394 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 20:21:25,394 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:21:25,394 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:21:25,394 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:21:25,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:21:25,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:21:25,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:21:25,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:21:25,395 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:21:25,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:21:25,654 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:21:25,655 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 20:21:25,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:21:25 BoogieIcfgContainer [2021-05-02 20:21:25,656 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:21:25,657 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:21:25,657 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:21:25,657 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:21:25,659 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:21:25" (1/1) ... [2021-05-02 20:21:25,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:21:25 BasicIcfg [2021-05-02 20:21:25,675 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:21:25,676 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:21:25,676 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:21:25,678 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:21:25,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:21:25" (1/4) ... [2021-05-02 20:21:25,679 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5589cf0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:21:25, skipping insertion in model container [2021-05-02 20:21:25,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:21:25" (2/4) ... [2021-05-02 20:21:25,679 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5589cf0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:21:25, skipping insertion in model container [2021-05-02 20:21:25,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:21:25" (3/4) ... [2021-05-02 20:21:25,680 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5589cf0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:21:25, skipping insertion in model container [2021-05-02 20:21:25,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:21:25" (4/4) ... [2021-05-02 20:21:25,681 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound5.cJordan [2021-05-02 20:21:25,685 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:21:25,689 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:21:25,701 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:21:25,717 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:21:25,717 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:21:25,717 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:21:25,717 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:21:25,717 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:21:25,718 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:21:25,718 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:21:25,718 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:21:25,728 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 20:21:25,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 20:21:25,734 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:21:25,735 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] [2021-05-02 20:21:25,735 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:21:25,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:21:25,739 INFO L82 PathProgramCache]: Analyzing trace with hash -282167495, now seen corresponding path program 1 times [2021-05-02 20:21:25,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:21:25,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111332466] [2021-05-02 20:21:25,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:21:25,909 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:21:25,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [648473862] [2021-05-02 20:21:25,911 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 20:21:26,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:21:26,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 1 conjunts are in the unsatisfiable core [2021-05-02 20:21:26,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:21:26,136 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 20:21:26,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:21:26,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111332466] [2021-05-02 20:21:26,137 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:21:26,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648473862] [2021-05-02 20:21:26,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648473862] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:21:26,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:21:26,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-02 20:21:26,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183524691] [2021-05-02 20:21:26,142 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-05-02 20:21:26,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:21:26,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-05-02 20:21:26,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-02 20:21:26,158 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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 20:21:26,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:21:26,173 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2021-05-02 20:21:26,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-05-02 20:21:26,176 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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 32 [2021-05-02 20:21:26,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:21:26,182 INFO L225 Difference]: With dead ends: 39 [2021-05-02 20:21:26,182 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 20:21:26,183 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-02 20:21:26,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 20:21:26,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-02 20:21:26,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 20 states have internal predecessors, (23), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 20:21:26,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2021-05-02 20:21:26,215 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 32 [2021-05-02 20:21:26,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:21:26,217 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2021-05-02 20:21:26,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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 20:21:26,218 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2021-05-02 20:21:26,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 20:21:26,219 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:21:26,220 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 20:21:26,433 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-02 20:21:26,433 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:21:26,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:21:26,434 INFO L82 PathProgramCache]: Analyzing trace with hash -127828113, now seen corresponding path program 1 times [2021-05-02 20:21:26,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:21:26,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291131330] [2021-05-02 20:21:26,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:21:26,451 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:21:26,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1149186049] [2021-05-02 20:21:26,451 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 20:21:26,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:21:26,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:21:26,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:21:26,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:26,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:26,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:26,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:26,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:26,694 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 20:21:26,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:21:26,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291131330] [2021-05-02 20:21:26,694 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:21:26,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149186049] [2021-05-02 20:21:26,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149186049] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:21:26,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:21:26,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 20:21:26,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433148103] [2021-05-02 20:21:26,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 20:21:26,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:21:26,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 20:21:26,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:21:26,701 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:21:26,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:21:26,720 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2021-05-02 20:21:26,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 20:21:26,723 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 20:21:26,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:21:26,725 INFO L225 Difference]: With dead ends: 36 [2021-05-02 20:21:26,725 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 20:21:26,726 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:21:26,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 20:21:26,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-02 20:21:26,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 20:21:26,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2021-05-02 20:21:26,737 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 33 [2021-05-02 20:21:26,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:21:26,737 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2021-05-02 20:21:26,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:21:26,738 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2021-05-02 20:21:26,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 20:21:26,739 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:21:26,739 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 20:21:26,960 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:21:26,961 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:21:26,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:21:26,961 INFO L82 PathProgramCache]: Analyzing trace with hash 365419517, now seen corresponding path program 1 times [2021-05-02 20:21:26,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:21:26,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038362392] [2021-05-02 20:21:26,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:21:26,987 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:21:26,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [352794081] [2021-05-02 20:21:26,987 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 20:21:27,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:21:27,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:21:27,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:21:27,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:27,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:27,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:27,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:27,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:27,176 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 20:21:27,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:21:27,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038362392] [2021-05-02 20:21:27,176 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:21:27,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352794081] [2021-05-02 20:21:27,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352794081] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:21:27,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:21:27,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 20:21:27,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758077109] [2021-05-02 20:21:27,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:21:27,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:21:27,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:21:27,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:21:27,179 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:21:27,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:21:27,270 INFO L93 Difference]: Finished difference Result 45 states and 62 transitions. [2021-05-02 20:21:27,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:21:27,271 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), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-05-02 20:21:27,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:21:27,272 INFO L225 Difference]: With dead ends: 45 [2021-05-02 20:21:27,272 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 20:21:27,272 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 28.8ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:21:27,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 20:21:27,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2021-05-02 20:21:27,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 20:21:27,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2021-05-02 20:21:27,278 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 34 [2021-05-02 20:21:27,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:21:27,278 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2021-05-02 20:21:27,278 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), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:21:27,278 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2021-05-02 20:21:27,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 20:21:27,279 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:21:27,279 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] [2021-05-02 20:21:27,479 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:21:27,480 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:21:27,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:21:27,480 INFO L82 PathProgramCache]: Analyzing trace with hash 196514290, now seen corresponding path program 1 times [2021-05-02 20:21:27,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:21:27,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515485817] [2021-05-02 20:21:27,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:21:27,493 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:21:27,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1147326012] [2021-05-02 20:21:27,493 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 20:21:27,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:21:27,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 20:21:27,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:21:27,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:27,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:27,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:27,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:27,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:27,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:27,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:27,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:27,670 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:21:27,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:21:27,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515485817] [2021-05-02 20:21:27,670 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:21:27,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147326012] [2021-05-02 20:21:27,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147326012] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:21:27,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:21:27,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:21:27,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698793623] [2021-05-02 20:21:27,671 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:21:27,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:21:27,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:21:27,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:21:27,672 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:21:27,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:21:27,804 INFO L93 Difference]: Finished difference Result 57 states and 79 transitions. [2021-05-02 20:21:27,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:21:27,804 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2021-05-02 20:21:27,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:21:27,805 INFO L225 Difference]: With dead ends: 57 [2021-05-02 20:21:27,805 INFO L226 Difference]: Without dead ends: 57 [2021-05-02 20:21:27,806 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 60.0ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:21:27,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-02 20:21:27,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 44. [2021-05-02 20:21:27,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 28 states have internal predecessors, (32), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 20:21:27,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2021-05-02 20:21:27,812 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 36 [2021-05-02 20:21:27,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:21:27,812 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2021-05-02 20:21:27,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:21:27,813 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2021-05-02 20:21:27,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 20:21:27,813 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:21:27,814 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 20:21:28,035 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:21:28,036 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:21:28,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:21:28,036 INFO L82 PathProgramCache]: Analyzing trace with hash 56558454, now seen corresponding path program 1 times [2021-05-02 20:21:28,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:21:28,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362668665] [2021-05-02 20:21:28,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:21:28,055 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:21:28,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [916868815] [2021-05-02 20:21:28,055 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 20:21:28,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:21:28,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:21:28,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:21:28,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:28,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:28,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:28,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:28,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:28,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:28,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:28,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:28,231 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 20:21:28,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:21:28,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362668665] [2021-05-02 20:21:28,231 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:21:28,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916868815] [2021-05-02 20:21:28,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916868815] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:21:28,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:21:28,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:21:28,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434720022] [2021-05-02 20:21:28,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:21:28,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:21:28,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:21:28,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:21:28,233 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:21:28,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:21:28,261 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2021-05-02 20:21:28,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 20:21:28,262 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2021-05-02 20:21:28,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:21:28,264 INFO L225 Difference]: With dead ends: 44 [2021-05-02 20:21:28,264 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 20:21:28,264 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 8.5ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:21:28,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 20:21:28,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-02 20:21:28,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 28 states have internal predecessors, (31), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 20:21:28,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2021-05-02 20:21:28,269 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 39 [2021-05-02 20:21:28,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:21:28,269 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2021-05-02 20:21:28,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:21:28,270 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2021-05-02 20:21:28,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 20:21:28,270 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:21:28,271 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] [2021-05-02 20:21:28,484 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:21:28,485 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:21:28,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:21:28,485 INFO L82 PathProgramCache]: Analyzing trace with hash 578094295, now seen corresponding path program 1 times [2021-05-02 20:21:28,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:21:28,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629730079] [2021-05-02 20:21:28,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:21:28,513 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:21:28,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2097145816] [2021-05-02 20:21:28,513 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 20:21:28,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:21:28,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 20:21:28,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:21:28,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:28,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:28,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:28,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:28,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:28,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:28,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:28,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:28,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:28,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:28,725 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 20:21:28,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:21:28,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629730079] [2021-05-02 20:21:28,725 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:21:28,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097145816] [2021-05-02 20:21:28,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097145816] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:21:28,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:21:28,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:21:28,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046050590] [2021-05-02 20:21:28,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:21:28,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:21:28,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:21:28,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:21:28,727 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 20:21:28,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:21:28,824 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2021-05-02 20:21:28,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:21:28,825 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2021-05-02 20:21:28,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:21:28,826 INFO L225 Difference]: With dead ends: 56 [2021-05-02 20:21:28,826 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 20:21:28,826 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 47.5ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:21:28,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 20:21:28,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-02 20:21:28,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 32 states have (on average 1.21875) internal successors, (39), 34 states have internal predecessors, (39), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 20:21:28,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 71 transitions. [2021-05-02 20:21:28,832 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 71 transitions. Word has length 41 [2021-05-02 20:21:28,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:21:28,832 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 71 transitions. [2021-05-02 20:21:28,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 20:21:28,832 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 71 transitions. [2021-05-02 20:21:28,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 20:21:28,834 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:21:28,835 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] [2021-05-02 20:21:29,041 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:21:29,041 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:21:29,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:21:29,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1581112078, now seen corresponding path program 1 times [2021-05-02 20:21:29,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:21:29,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234480369] [2021-05-02 20:21:29,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:21:29,053 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:21:29,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [344186772] [2021-05-02 20:21:29,054 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 20:21:29,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:21:29,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 20:21:29,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:21:29,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:29,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:29,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:29,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:29,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:29,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:29,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:29,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:29,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:29,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:29,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:29,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:29,254 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-05-02 20:21:29,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:21:29,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234480369] [2021-05-02 20:21:29,254 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:21:29,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344186772] [2021-05-02 20:21:29,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344186772] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:21:29,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:21:29,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:21:29,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350430019] [2021-05-02 20:21:29,255 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:21:29,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:21:29,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:21:29,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:21:29,256 INFO L87 Difference]: Start difference. First operand 55 states and 71 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:21:29,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:21:29,355 INFO L93 Difference]: Finished difference Result 60 states and 75 transitions. [2021-05-02 20:21:29,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:21:29,356 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2021-05-02 20:21:29,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:21:29,357 INFO L225 Difference]: With dead ends: 60 [2021-05-02 20:21:29,357 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 20:21:29,357 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 38.4ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:21:29,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 20:21:29,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-05-02 20:21:29,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 35 states have (on average 1.2) internal successors, (42), 37 states have internal predecessors, (42), 17 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 20:21:29,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2021-05-02 20:21:29,371 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 46 [2021-05-02 20:21:29,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:21:29,371 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2021-05-02 20:21:29,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:21:29,371 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2021-05-02 20:21:29,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 20:21:29,372 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:21:29,372 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] [2021-05-02 20:21:29,573 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:21:29,573 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:21:29,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:21:29,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1942645143, now seen corresponding path program 1 times [2021-05-02 20:21:29,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:21:29,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866358788] [2021-05-02 20:21:29,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:21:29,583 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:21:29,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [610293760] [2021-05-02 20:21:29,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:21:29,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:21:29,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 20:21:29,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:21:29,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:29,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:29,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:29,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:29,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:29,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:29,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:29,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:29,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:29,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:29,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:29,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:29,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:29,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:29,849 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-05-02 20:21:29,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:21:29,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866358788] [2021-05-02 20:21:29,849 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:21:29,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610293760] [2021-05-02 20:21:29,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610293760] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:21:29,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:21:29,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:21:29,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183879168] [2021-05-02 20:21:29,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:21:29,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:21:29,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:21:29,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:21:29,851 INFO L87 Difference]: Start difference. First operand 59 states and 74 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 20:21:32,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:21:32,112 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2021-05-02 20:21:32,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:21:32,112 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), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 51 [2021-05-02 20:21:32,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:21:32,113 INFO L225 Difference]: With dead ends: 64 [2021-05-02 20:21:32,113 INFO L226 Difference]: Without dead ends: 64 [2021-05-02 20:21:32,114 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 73.3ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:21:32,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-02 20:21:32,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-05-02 20:21:32,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 40 states have internal predecessors, (45), 17 states have call successors, (17), 8 states have call predecessors, (17), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 20:21:32,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2021-05-02 20:21:32,118 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 51 [2021-05-02 20:21:32,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:21:32,118 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2021-05-02 20:21:32,119 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), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 20:21:32,119 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2021-05-02 20:21:32,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-02 20:21:32,120 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:21:32,120 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1] [2021-05-02 20:21:32,341 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-05-02 20:21:32,342 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:21:32,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:21:32,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1782154901, now seen corresponding path program 1 times [2021-05-02 20:21:32,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:21:32,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679387322] [2021-05-02 20:21:32,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:21:32,349 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:21:32,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [5187794] [2021-05-02 20:21:32,349 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 20:21:32,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:21:32,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 20:21:32,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:21:32,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:32,563 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-05-02 20:21:32,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:21:32,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679387322] [2021-05-02 20:21:32,564 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:21:32,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5187794] [2021-05-02 20:21:32,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5187794] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:21:32,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:21:32,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:21:32,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437723870] [2021-05-02 20:21:32,565 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:21:32,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:21:32,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:21:32,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:21:32,565 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-02 20:21:32,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:21:32,701 INFO L93 Difference]: Finished difference Result 94 states and 129 transitions. [2021-05-02 20:21:32,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:21:32,701 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 59 [2021-05-02 20:21:32,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:21:32,704 INFO L225 Difference]: With dead ends: 94 [2021-05-02 20:21:32,704 INFO L226 Difference]: Without dead ends: 94 [2021-05-02 20:21:32,704 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 44.2ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:21:32,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-02 20:21:32,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 84. [2021-05-02 20:21:32,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 52 states have internal predecessors, (61), 26 states have call successors, (26), 9 states have call predecessors, (26), 8 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 20:21:32,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 111 transitions. [2021-05-02 20:21:32,724 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 111 transitions. Word has length 59 [2021-05-02 20:21:32,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:21:32,726 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 111 transitions. [2021-05-02 20:21:32,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-02 20:21:32,726 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 111 transitions. [2021-05-02 20:21:32,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-02 20:21:32,728 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:21:32,729 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:21:32,950 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:21:32,951 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:21:32,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:21:32,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1573186588, now seen corresponding path program 1 times [2021-05-02 20:21:32,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:21:32,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147198205] [2021-05-02 20:21:32,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:21:32,963 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:21:32,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [274607690] [2021-05-02 20:21:32,963 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 20:21:33,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:21:33,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:21:33,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:21:33,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:33,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:33,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:33,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:33,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:33,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:33,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:33,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:33,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:33,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:33,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:33,164 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-02 20:21:33,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:21:33,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147198205] [2021-05-02 20:21:33,164 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:21:33,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274607690] [2021-05-02 20:21:33,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274607690] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:21:33,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:21:33,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 20:21:33,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171570244] [2021-05-02 20:21:33,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:21:33,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:21:33,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:21:33,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:21:33,167 INFO L87 Difference]: Start difference. First operand 84 states and 111 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 20:21:33,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:21:33,212 INFO L93 Difference]: Finished difference Result 99 states and 123 transitions. [2021-05-02 20:21:33,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:21:33,218 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 60 [2021-05-02 20:21:33,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:21:33,219 INFO L225 Difference]: With dead ends: 99 [2021-05-02 20:21:33,219 INFO L226 Difference]: Without dead ends: 99 [2021-05-02 20:21:33,219 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 18.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:21:33,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-05-02 20:21:33,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-05-02 20:21:33,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 61 states have (on average 1.1967213114754098) internal successors, (73), 64 states have internal predecessors, (73), 26 states have call successors, (26), 12 states have call predecessors, (26), 11 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 20:21:33,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 123 transitions. [2021-05-02 20:21:33,225 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 123 transitions. Word has length 60 [2021-05-02 20:21:33,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:21:33,225 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 123 transitions. [2021-05-02 20:21:33,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 20:21:33,225 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 123 transitions. [2021-05-02 20:21:33,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 20:21:33,226 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:21:33,226 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] [2021-05-02 20:21:33,437 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:21:33,437 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:21:33,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:21:33,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1491020248, now seen corresponding path program 1 times [2021-05-02 20:21:33,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:21:33,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391768354] [2021-05-02 20:21:33,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:21:33,464 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:21:33,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1739763266] [2021-05-02 20:21:33,464 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 20:21:33,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:21:33,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:21:33,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:21:33,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:33,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:33,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:33,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:33,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:33,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:33,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:33,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:33,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:33,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:33,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:33,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:33,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:33,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:33,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:33,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:33,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:33,674 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-05-02 20:21:33,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:21:33,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391768354] [2021-05-02 20:21:33,674 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:21:33,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739763266] [2021-05-02 20:21:33,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739763266] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:21:33,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:21:33,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:21:33,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615129436] [2021-05-02 20:21:33,676 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:21:33,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:21:33,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:21:33,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:21:33,677 INFO L87 Difference]: Start difference. First operand 99 states and 123 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 20:21:33,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:21:33,855 INFO L93 Difference]: Finished difference Result 170 states and 243 transitions. [2021-05-02 20:21:33,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:21:33,856 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 61 [2021-05-02 20:21:33,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:21:33,857 INFO L225 Difference]: With dead ends: 170 [2021-05-02 20:21:33,857 INFO L226 Difference]: Without dead ends: 170 [2021-05-02 20:21:33,857 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 78.1ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:21:33,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-05-02 20:21:33,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 142. [2021-05-02 20:21:33,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 87 states have (on average 1.2873563218390804) internal successors, (112), 91 states have internal predecessors, (112), 43 states have call successors, (43), 12 states have call predecessors, (43), 11 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2021-05-02 20:21:33,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 196 transitions. [2021-05-02 20:21:33,866 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 196 transitions. Word has length 61 [2021-05-02 20:21:33,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:21:33,866 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 196 transitions. [2021-05-02 20:21:33,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 20:21:33,866 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 196 transitions. [2021-05-02 20:21:33,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-02 20:21:33,867 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:21:33,867 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] [2021-05-02 20:21:34,089 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-02 20:21:34,090 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:21:34,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:21:34,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1948826973, now seen corresponding path program 1 times [2021-05-02 20:21:34,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:21:34,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121931581] [2021-05-02 20:21:34,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:21:34,107 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:21:34,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1662041432] [2021-05-02 20:21:34,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:21:34,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:21:34,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:21:34,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:21:34,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:34,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:34,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:34,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:34,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:34,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:34,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:34,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:34,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:34,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:34,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:34,292 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-02 20:21:34,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:21:34,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121931581] [2021-05-02 20:21:34,293 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:21:34,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662041432] [2021-05-02 20:21:34,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662041432] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:21:34,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:21:34,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 20:21:34,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874904806] [2021-05-02 20:21:34,293 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:21:34,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:21:34,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:21:34,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:21:34,294 INFO L87 Difference]: Start difference. First operand 142 states and 196 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 20:21:34,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:21:34,343 INFO L93 Difference]: Finished difference Result 142 states and 195 transitions. [2021-05-02 20:21:34,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:21:34,344 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 62 [2021-05-02 20:21:34,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:21:34,347 INFO L225 Difference]: With dead ends: 142 [2021-05-02 20:21:34,347 INFO L226 Difference]: Without dead ends: 142 [2021-05-02 20:21:34,348 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 19.0ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:21:34,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-05-02 20:21:34,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-05-02 20:21:34,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 87 states have (on average 1.2758620689655173) internal successors, (111), 91 states have internal predecessors, (111), 43 states have call successors, (43), 12 states have call predecessors, (43), 11 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2021-05-02 20:21:34,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 195 transitions. [2021-05-02 20:21:34,363 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 195 transitions. Word has length 62 [2021-05-02 20:21:34,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:21:34,363 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 195 transitions. [2021-05-02 20:21:34,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 20:21:34,363 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 195 transitions. [2021-05-02 20:21:34,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-02 20:21:34,364 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:21:34,364 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 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, 1, 1, 1] [2021-05-02 20:21:34,580 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:21:34,581 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:21:34,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:21:34,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1844620331, now seen corresponding path program 1 times [2021-05-02 20:21:34,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:21:34,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839541426] [2021-05-02 20:21:34,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:21:34,600 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:21:34,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [569238954] [2021-05-02 20:21:34,600 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 20:21:34,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:21:34,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 20:21:34,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:21:34,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:34,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:34,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:34,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:34,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:34,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:34,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:34,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:34,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:34,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:34,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:34,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:34,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:34,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:34,800 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-02 20:21:34,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:21:34,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839541426] [2021-05-02 20:21:34,801 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:21:34,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569238954] [2021-05-02 20:21:34,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569238954] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:21:34,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:21:34,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:21:34,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106649985] [2021-05-02 20:21:34,801 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:21:34,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:21:34,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:21:34,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:21:34,802 INFO L87 Difference]: Start difference. First operand 142 states and 195 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 20:21:34,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:21:34,882 INFO L93 Difference]: Finished difference Result 169 states and 222 transitions. [2021-05-02 20:21:34,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:21:34,883 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 66 [2021-05-02 20:21:34,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:21:34,884 INFO L225 Difference]: With dead ends: 169 [2021-05-02 20:21:34,884 INFO L226 Difference]: Without dead ends: 169 [2021-05-02 20:21:34,884 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 29.5ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:21:34,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-05-02 20:21:34,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 167. [2021-05-02 20:21:34,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 105 states have (on average 1.2380952380952381) internal successors, (130), 108 states have internal predecessors, (130), 46 states have call successors, (46), 16 states have call predecessors, (46), 15 states have return successors, (44), 42 states have call predecessors, (44), 44 states have call successors, (44) [2021-05-02 20:21:34,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 220 transitions. [2021-05-02 20:21:34,891 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 220 transitions. Word has length 66 [2021-05-02 20:21:34,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:21:34,891 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 220 transitions. [2021-05-02 20:21:34,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 20:21:34,891 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 220 transitions. [2021-05-02 20:21:34,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 20:21:34,892 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:21:34,892 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 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 20:21:35,108 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 20:21:35,109 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:21:35,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:21:35,109 INFO L82 PathProgramCache]: Analyzing trace with hash 918639692, now seen corresponding path program 1 times [2021-05-02 20:21:35,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:21:35,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298716089] [2021-05-02 20:21:35,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:21:35,116 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:21:35,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1581405820] [2021-05-02 20:21:35,116 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 20:21:35,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:21:35,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 20:21:35,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:21:35,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:35,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:35,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:35,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:35,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:35,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:35,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:35,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:35,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:35,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:35,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:35,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:35,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:35,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:35,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:35,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:35,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:35,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:35,392 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 22 proven. 16 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-05-02 20:21:35,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:21:35,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298716089] [2021-05-02 20:21:35,393 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:21:35,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581405820] [2021-05-02 20:21:35,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581405820] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:21:35,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:21:35,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:21:35,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735476546] [2021-05-02 20:21:35,393 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:21:35,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:21:35,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:21:35,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:21:35,394 INFO L87 Difference]: Start difference. First operand 167 states and 220 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 20:21:35,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:21:35,610 INFO L93 Difference]: Finished difference Result 200 states and 267 transitions. [2021-05-02 20:21:35,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:21:35,611 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 68 [2021-05-02 20:21:35,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:21:35,612 INFO L225 Difference]: With dead ends: 200 [2021-05-02 20:21:35,612 INFO L226 Difference]: Without dead ends: 199 [2021-05-02 20:21:35,613 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 107.8ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:21:35,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-05-02 20:21:35,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 196. [2021-05-02 20:21:35,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 126 states have (on average 1.2619047619047619) internal successors, (159), 133 states have internal predecessors, (159), 53 states have call successors, (53), 17 states have call predecessors, (53), 16 states have return successors, (50), 45 states have call predecessors, (50), 50 states have call successors, (50) [2021-05-02 20:21:35,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 262 transitions. [2021-05-02 20:21:35,620 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 262 transitions. Word has length 68 [2021-05-02 20:21:35,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:21:35,621 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 262 transitions. [2021-05-02 20:21:35,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 20:21:35,621 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 262 transitions. [2021-05-02 20:21:35,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 20:21:35,622 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:21:35,622 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 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] [2021-05-02 20:21:35,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:21:35,844 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:21:35,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:21:35,845 INFO L82 PathProgramCache]: Analyzing trace with hash -210356579, now seen corresponding path program 2 times [2021-05-02 20:21:35,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:21:35,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951666185] [2021-05-02 20:21:35,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:21:35,851 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:21:35,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2093582601] [2021-05-02 20:21:35,852 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 20:21:35,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:21:35,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:21:35,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 20:21:35,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:21:35,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:35,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:35,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:35,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:35,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:35,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:35,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:35,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:35,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:35,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:36,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:36,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:36,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:36,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:36,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:36,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:36,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:36,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:36,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:36,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:36,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:36,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:36,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:36,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:36,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:36,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:36,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:36,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:36,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:36,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:36,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:36,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:36,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:36,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:36,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:36,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:36,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:36,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:36,173 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 12 proven. 20 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-05-02 20:21:36,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:21:36,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951666185] [2021-05-02 20:21:36,174 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:21:36,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093582601] [2021-05-02 20:21:36,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093582601] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:21:36,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:21:36,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:21:36,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331791493] [2021-05-02 20:21:36,175 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:21:36,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:21:36,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:21:36,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:21:36,175 INFO L87 Difference]: Start difference. First operand 196 states and 262 transitions. Second operand has 11 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-02 20:21:36,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:21:36,394 INFO L93 Difference]: Finished difference Result 222 states and 299 transitions. [2021-05-02 20:21:36,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:21:36,395 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) Word has length 73 [2021-05-02 20:21:36,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:21:36,396 INFO L225 Difference]: With dead ends: 222 [2021-05-02 20:21:36,396 INFO L226 Difference]: Without dead ends: 222 [2021-05-02 20:21:36,397 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 105.7ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:21:36,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-05-02 20:21:36,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 219. [2021-05-02 20:21:36,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 138 states have (on average 1.2681159420289856) internal successors, (175), 146 states have internal predecessors, (175), 62 states have call successors, (62), 19 states have call predecessors, (62), 18 states have return successors, (59), 53 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-02 20:21:36,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 296 transitions. [2021-05-02 20:21:36,404 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 296 transitions. Word has length 73 [2021-05-02 20:21:36,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:21:36,405 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 296 transitions. [2021-05-02 20:21:36,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-02 20:21:36,405 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 296 transitions. [2021-05-02 20:21:36,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-02 20:21:36,406 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:21:36,406 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:21:36,619 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 20:21:36,619 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:21:36,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:21:36,619 INFO L82 PathProgramCache]: Analyzing trace with hash 952478412, now seen corresponding path program 3 times [2021-05-02 20:21:36,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:21:36,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431787181] [2021-05-02 20:21:36,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:21:36,626 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:21:36,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [717437439] [2021-05-02 20:21:36,626 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 20:21:36,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:21:36,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:21:36,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-02 20:21:36,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:21:36,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:36,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:36,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:36,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:36,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:36,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:36,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:36,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:36,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:36,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:36,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:36,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:36,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:36,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:36,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:36,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:36,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:36,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:36,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:36,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:37,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:37,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:37,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:37,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:37,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:37,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:37,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:37,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:37,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:37,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:37,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:37,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:37,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:37,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:37,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:37,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:37,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:37,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:37,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:37,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:37,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:37,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:37,146 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 31 proven. 19 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-05-02 20:21:37,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:21:37,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431787181] [2021-05-02 20:21:37,146 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:21:37,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717437439] [2021-05-02 20:21:37,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717437439] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:21:37,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:21:37,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 20:21:37,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890026809] [2021-05-02 20:21:37,147 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 20:21:37,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:21:37,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 20:21:37,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:21:37,148 INFO L87 Difference]: Start difference. First operand 219 states and 296 transitions. Second operand has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 20:21:37,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:21:37,575 INFO L93 Difference]: Finished difference Result 226 states and 302 transitions. [2021-05-02 20:21:37,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 20:21:37,576 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 78 [2021-05-02 20:21:37,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:21:37,578 INFO L225 Difference]: With dead ends: 226 [2021-05-02 20:21:37,578 INFO L226 Difference]: Without dead ends: 226 [2021-05-02 20:21:37,578 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 281.2ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-05-02 20:21:37,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-05-02 20:21:37,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 223. [2021-05-02 20:21:37,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 141 states have (on average 1.2624113475177305) internal successors, (178), 149 states have internal predecessors, (178), 62 states have call successors, (62), 20 states have call predecessors, (62), 19 states have return successors, (59), 53 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-02 20:21:37,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 299 transitions. [2021-05-02 20:21:37,586 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 299 transitions. Word has length 78 [2021-05-02 20:21:37,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:21:37,586 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 299 transitions. [2021-05-02 20:21:37,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 20:21:37,586 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 299 transitions. [2021-05-02 20:21:37,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-02 20:21:37,587 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:21:37,587 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 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] [2021-05-02 20:21:37,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 20:21:37,801 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:21:37,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:21:37,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1350616622, now seen corresponding path program 2 times [2021-05-02 20:21:37,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:21:37,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516901706] [2021-05-02 20:21:37,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:21:37,813 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:21:37,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [112652448] [2021-05-02 20:21:37,813 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 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 20:21:37,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:21:37,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:21:37,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-02 20:21:37,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:21:37,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:37,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:37,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:37,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:37,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:37,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:37,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:37,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:37,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:37,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:38,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:38,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:38,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:38,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:38,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:38,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:38,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:38,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:38,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:38,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:38,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:38,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:38,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:38,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:38,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:38,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:38,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:38,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:38,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:38,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:38,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:38,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:38,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:38,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:38,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:38,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:38,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:38,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:38,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:38,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:38,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:38,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:38,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:38,220 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 41 proven. 36 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-05-02 20:21:38,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:21:38,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516901706] [2021-05-02 20:21:38,221 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:21:38,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112652448] [2021-05-02 20:21:38,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112652448] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:21:38,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:21:38,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 20:21:38,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326687354] [2021-05-02 20:21:38,221 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 20:21:38,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:21:38,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 20:21:38,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:21:38,222 INFO L87 Difference]: Start difference. First operand 223 states and 299 transitions. Second operand has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 11 states have internal predecessors, (30), 7 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-02 20:21:38,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:21:38,626 INFO L93 Difference]: Finished difference Result 235 states and 315 transitions. [2021-05-02 20:21:38,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 20:21:38,627 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 11 states have internal predecessors, (30), 7 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) Word has length 82 [2021-05-02 20:21:38,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:21:38,628 INFO L225 Difference]: With dead ends: 235 [2021-05-02 20:21:38,628 INFO L226 Difference]: Without dead ends: 235 [2021-05-02 20:21:38,628 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 197.3ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-05-02 20:21:38,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-05-02 20:21:38,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 228. [2021-05-02 20:21:38,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 144 states have (on average 1.2569444444444444) internal successors, (181), 153 states have internal predecessors, (181), 63 states have call successors, (63), 21 states have call predecessors, (63), 20 states have return successors, (60), 53 states have call predecessors, (60), 60 states have call successors, (60) [2021-05-02 20:21:38,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 304 transitions. [2021-05-02 20:21:38,636 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 304 transitions. Word has length 82 [2021-05-02 20:21:38,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:21:38,636 INFO L480 AbstractCegarLoop]: Abstraction has 228 states and 304 transitions. [2021-05-02 20:21:38,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 11 states have internal predecessors, (30), 7 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-02 20:21:38,636 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 304 transitions. [2021-05-02 20:21:38,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-05-02 20:21:38,637 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:21:38,637 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 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, 1] [2021-05-02 20:21:38,858 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-02 20:21:38,859 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:21:38,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:21:38,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1080401827, now seen corresponding path program 1 times [2021-05-02 20:21:38,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:21:38,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743801800] [2021-05-02 20:21:38,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:21:38,866 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:21:38,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [596834736] [2021-05-02 20:21:38,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:21:38,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:21:38,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 20:21:38,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:21:38,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:38,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:38,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:38,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:38,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:38,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:38,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:38,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:38,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:39,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:39,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:39,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:39,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:39,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:39,064 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 16 proven. 73 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-05-02 20:21:39,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:21:39,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743801800] [2021-05-02 20:21:39,064 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:21:39,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596834736] [2021-05-02 20:21:39,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596834736] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:21:39,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:21:39,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:21:39,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033853758] [2021-05-02 20:21:39,065 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:21:39,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:21:39,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:21:39,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:21:39,066 INFO L87 Difference]: Start difference. First operand 228 states and 304 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 20:21:39,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:21:39,136 INFO L93 Difference]: Finished difference Result 231 states and 307 transitions. [2021-05-02 20:21:39,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:21:39,137 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 83 [2021-05-02 20:21:39,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:21:39,138 INFO L225 Difference]: With dead ends: 231 [2021-05-02 20:21:39,138 INFO L226 Difference]: Without dead ends: 231 [2021-05-02 20:21:39,139 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 28.8ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:21:39,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-05-02 20:21:39,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2021-05-02 20:21:39,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 147 states have (on average 1.251700680272109) internal successors, (184), 156 states have internal predecessors, (184), 63 states have call successors, (63), 21 states have call predecessors, (63), 20 states have return successors, (60), 53 states have call predecessors, (60), 60 states have call successors, (60) [2021-05-02 20:21:39,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 307 transitions. [2021-05-02 20:21:39,146 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 307 transitions. Word has length 83 [2021-05-02 20:21:39,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:21:39,148 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 307 transitions. [2021-05-02 20:21:39,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 20:21:39,148 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 307 transitions. [2021-05-02 20:21:39,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-05-02 20:21:39,149 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:21:39,150 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:21:39,371 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-02 20:21:39,372 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:21:39,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:21:39,372 INFO L82 PathProgramCache]: Analyzing trace with hash 900405455, now seen corresponding path program 1 times [2021-05-02 20:21:39,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:21:39,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592629915] [2021-05-02 20:21:39,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:21:39,384 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:21:39,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1925377291] [2021-05-02 20:21:39,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:21:39,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:21:39,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 20:21:39,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:21:39,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:39,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:39,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:39,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:39,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:39,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:39,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:39,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:39,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:39,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:39,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:39,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:39,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:39,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:39,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:39,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:39,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:39,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:39,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:39,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:39,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:39,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:39,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:39,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:39,785 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-05-02 20:21:39,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:21:39,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592629915] [2021-05-02 20:21:39,786 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:21:39,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925377291] [2021-05-02 20:21:39,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925377291] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:21:39,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:21:39,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:21:39,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366075262] [2021-05-02 20:21:39,786 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:21:39,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:21:39,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:21:39,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:21:39,787 INFO L87 Difference]: Start difference. First operand 231 states and 307 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 20:21:40,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:21:40,265 INFO L93 Difference]: Finished difference Result 261 states and 350 transitions. [2021-05-02 20:21:40,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:21:40,265 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 84 [2021-05-02 20:21:40,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:21:40,267 INFO L225 Difference]: With dead ends: 261 [2021-05-02 20:21:40,267 INFO L226 Difference]: Without dead ends: 260 [2021-05-02 20:21:40,267 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 302.2ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-05-02 20:21:40,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-05-02 20:21:40,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 257. [2021-05-02 20:21:40,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 162 states have (on average 1.2592592592592593) internal successors, (204), 172 states have internal predecessors, (204), 72 states have call successors, (72), 23 states have call predecessors, (72), 22 states have return successors, (69), 61 states have call predecessors, (69), 69 states have call successors, (69) [2021-05-02 20:21:40,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 345 transitions. [2021-05-02 20:21:40,287 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 345 transitions. Word has length 84 [2021-05-02 20:21:40,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:21:40,287 INFO L480 AbstractCegarLoop]: Abstraction has 257 states and 345 transitions. [2021-05-02 20:21:40,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 20:21:40,287 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 345 transitions. [2021-05-02 20:21:40,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 20:21:40,289 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:21:40,289 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:21:40,511 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-02 20:21:40,511 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:21:40,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:21:40,512 INFO L82 PathProgramCache]: Analyzing trace with hash -2138218929, now seen corresponding path program 2 times [2021-05-02 20:21:40,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:21:40,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119052562] [2021-05-02 20:21:40,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:21:40,517 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:21:40,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1622767400] [2021-05-02 20:21:40,517 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:21:40,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:21:40,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:21:40,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 20:21:40,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:21:40,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:40,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:40,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:40,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:40,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:40,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:40,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:40,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:40,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:40,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:40,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:40,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:40,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:40,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:40,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:40,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:40,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:40,731 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 16 proven. 79 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-05-02 20:21:40,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:21:40,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119052562] [2021-05-02 20:21:40,732 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:21:40,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622767400] [2021-05-02 20:21:40,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622767400] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:21:40,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:21:40,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:21:40,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485941511] [2021-05-02 20:21:40,732 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:21:40,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:21:40,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:21:40,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:21:40,733 INFO L87 Difference]: Start difference. First operand 257 states and 345 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 20:21:40,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:21:40,846 INFO L93 Difference]: Finished difference Result 292 states and 378 transitions. [2021-05-02 20:21:40,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:21:40,847 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 87 [2021-05-02 20:21:40,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:21:40,848 INFO L225 Difference]: With dead ends: 292 [2021-05-02 20:21:40,849 INFO L226 Difference]: Without dead ends: 292 [2021-05-02 20:21:40,849 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 40.1ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:21:40,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-05-02 20:21:40,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 291. [2021-05-02 20:21:40,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 187 states have (on average 1.2299465240641712) internal successors, (230), 196 states have internal predecessors, (230), 75 states have call successors, (75), 29 states have call predecessors, (75), 28 states have return successors, (72), 65 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-02 20:21:40,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 377 transitions. [2021-05-02 20:21:40,857 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 377 transitions. Word has length 87 [2021-05-02 20:21:40,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:21:40,857 INFO L480 AbstractCegarLoop]: Abstraction has 291 states and 377 transitions. [2021-05-02 20:21:40,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 20:21:40,857 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 377 transitions. [2021-05-02 20:21:40,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 20:21:40,858 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:21:40,858 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:21:41,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-02 20:21:41,073 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:21:41,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:21:41,073 INFO L82 PathProgramCache]: Analyzing trace with hash 118626568, now seen corresponding path program 1 times [2021-05-02 20:21:41,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:21:41,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011060074] [2021-05-02 20:21:41,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:21:41,079 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:21:41,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [303504292] [2021-05-02 20:21:41,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:21:41,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:21:41,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 20:21:41,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:21:41,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:41,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:41,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:41,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:41,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:41,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:41,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:41,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:41,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:41,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:41,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:41,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:41,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:41,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:41,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:41,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:41,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:41,316 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 21 proven. 78 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-05-02 20:21:41,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:21:41,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011060074] [2021-05-02 20:21:41,317 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:21:41,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303504292] [2021-05-02 20:21:41,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303504292] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:21:41,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:21:41,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:21:41,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405311694] [2021-05-02 20:21:41,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:21:41,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:21:41,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:21:41,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:21:41,318 INFO L87 Difference]: Start difference. First operand 291 states and 377 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 20:21:41,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:21:41,430 INFO L93 Difference]: Finished difference Result 293 states and 377 transitions. [2021-05-02 20:21:41,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:21:41,431 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 89 [2021-05-02 20:21:41,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:21:41,432 INFO L225 Difference]: With dead ends: 293 [2021-05-02 20:21:41,432 INFO L226 Difference]: Without dead ends: 293 [2021-05-02 20:21:41,432 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 37.2ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:21:41,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-05-02 20:21:41,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 293. [2021-05-02 20:21:41,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 189 states have (on average 1.216931216931217) internal successors, (230), 198 states have internal predecessors, (230), 75 states have call successors, (75), 29 states have call predecessors, (75), 28 states have return successors, (72), 65 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-02 20:21:41,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 377 transitions. [2021-05-02 20:21:41,441 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 377 transitions. Word has length 89 [2021-05-02 20:21:41,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:21:41,441 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 377 transitions. [2021-05-02 20:21:41,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 20:21:41,442 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 377 transitions. [2021-05-02 20:21:41,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-02 20:21:41,442 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:21:41,442 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2021-05-02 20:21:41,643 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-02 20:21:41,643 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:21:41,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:21:41,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1881160278, now seen corresponding path program 2 times [2021-05-02 20:21:41,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:21:41,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461159820] [2021-05-02 20:21:41,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:21:41,652 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:21:41,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2009760885] [2021-05-02 20:21:41,652 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:21:41,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:21:41,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:21:41,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:21:41,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:21:41,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:41,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:41,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:41,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:41,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:41,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:41,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:41,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:41,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:41,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:41,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:41,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:41,891 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-05-02 20:21:41,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:21:41,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461159820] [2021-05-02 20:21:41,891 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:21:41,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009760885] [2021-05-02 20:21:41,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009760885] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:21:41,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:21:41,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:21:41,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181190996] [2021-05-02 20:21:41,892 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:21:41,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:21:41,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:21:41,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:21:41,893 INFO L87 Difference]: Start difference. First operand 293 states and 377 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-05-02 20:21:41,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:21:41,952 INFO L93 Difference]: Finished difference Result 343 states and 457 transitions. [2021-05-02 20:21:41,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:21:41,953 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 93 [2021-05-02 20:21:41,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:21:41,955 INFO L225 Difference]: With dead ends: 343 [2021-05-02 20:21:41,955 INFO L226 Difference]: Without dead ends: 343 [2021-05-02 20:21:41,956 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 21.3ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:21:41,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-05-02 20:21:41,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 310. [2021-05-02 20:21:41,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 200 states have (on average 1.225) internal successors, (245), 208 states have internal predecessors, (245), 81 states have call successors, (81), 29 states have call predecessors, (81), 28 states have return successors, (78), 72 states have call predecessors, (78), 78 states have call successors, (78) [2021-05-02 20:21:41,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 404 transitions. [2021-05-02 20:21:41,966 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 404 transitions. Word has length 93 [2021-05-02 20:21:41,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:21:41,966 INFO L480 AbstractCegarLoop]: Abstraction has 310 states and 404 transitions. [2021-05-02 20:21:41,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-05-02 20:21:41,967 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 404 transitions. [2021-05-02 20:21:41,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-05-02 20:21:41,967 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:21:41,968 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:21:42,186 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:21:42,186 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:21:42,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:21:42,187 INFO L82 PathProgramCache]: Analyzing trace with hash 653404933, now seen corresponding path program 1 times [2021-05-02 20:21:42,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:21:42,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76034342] [2021-05-02 20:21:42,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:21:42,197 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:21:42,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1862466627] [2021-05-02 20:21:42,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:21:42,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:21:42,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-02 20:21:42,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:21:42,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:42,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:42,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:42,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:42,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:42,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:42,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:42,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:42,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:42,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:42,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:42,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:42,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:42,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:42,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:42,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:42,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:42,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:42,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:42,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:42,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:42,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:42,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:42,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:42,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:42,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:42,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:42,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:42,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:42,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:42,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:42,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:42,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:42,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:42,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:42,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:42,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:42,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:42,884 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 84 proven. 53 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-05-02 20:21:42,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:21:42,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76034342] [2021-05-02 20:21:42,885 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:21:42,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862466627] [2021-05-02 20:21:42,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862466627] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:21:42,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:21:42,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 20:21:42,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901924716] [2021-05-02 20:21:42,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 20:21:42,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:21:42,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 20:21:42,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:21:42,886 INFO L87 Difference]: Start difference. First operand 310 states and 404 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2021-05-02 20:21:47,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:21:47,445 INFO L93 Difference]: Finished difference Result 318 states and 411 transitions. [2021-05-02 20:21:47,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 20:21:47,446 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) Word has length 101 [2021-05-02 20:21:47,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:21:47,447 INFO L225 Difference]: With dead ends: 318 [2021-05-02 20:21:47,447 INFO L226 Difference]: Without dead ends: 318 [2021-05-02 20:21:47,448 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 496.2ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-05-02 20:21:47,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-05-02 20:21:47,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 314. [2021-05-02 20:21:47,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 203 states have (on average 1.2216748768472907) internal successors, (248), 211 states have internal predecessors, (248), 81 states have call successors, (81), 30 states have call predecessors, (81), 29 states have return successors, (78), 72 states have call predecessors, (78), 78 states have call successors, (78) [2021-05-02 20:21:47,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 407 transitions. [2021-05-02 20:21:47,456 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 407 transitions. Word has length 101 [2021-05-02 20:21:47,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:21:47,456 INFO L480 AbstractCegarLoop]: Abstraction has 314 states and 407 transitions. [2021-05-02 20:21:47,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2021-05-02 20:21:47,457 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 407 transitions. [2021-05-02 20:21:47,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-02 20:21:47,458 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:21:47,458 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:21:47,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-02 20:21:47,673 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:21:47,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:21:47,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1232145013, now seen corresponding path program 3 times [2021-05-02 20:21:47,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:21:47,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425653817] [2021-05-02 20:21:47,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:21:47,681 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:21:47,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1238995675] [2021-05-02 20:21:47,681 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:21:47,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 20:21:47,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:21:47,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 20:21:47,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:21:47,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:47,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:47,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:47,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:47,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:47,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:47,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:47,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:47,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:47,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:47,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:47,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:47,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:47,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:47,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:47,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:47,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:47,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:47,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:47,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:47,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:47,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:47,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:47,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:48,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:48,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:48,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:48,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:21:50,563 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 67 proven. 56 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2021-05-02 20:21:50,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:21:50,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425653817] [2021-05-02 20:21:50,564 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:21:50,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238995675] [2021-05-02 20:21:50,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238995675] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:21:50,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:21:50,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 20:21:50,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303327105] [2021-05-02 20:21:50,565 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 20:21:50,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:21:50,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 20:21:50,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=203, Unknown=1, NotChecked=0, Total=240 [2021-05-02 20:21:50,566 INFO L87 Difference]: Start difference. First operand 314 states and 407 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-02 20:21:52,921 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 20:21:59,471 WARN L205 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 31 [2021-05-02 20:22:10,774 WARN L205 SmtUtils]: Spent 2.12 s on a formula simplification that was a NOOP. DAG size: 31 [2021-05-02 20:22:19,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:22:19,444 INFO L93 Difference]: Finished difference Result 324 states and 420 transitions. [2021-05-02 20:22:19,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 20:22:19,445 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) Word has length 105 [2021-05-02 20:22:19,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:22:19,447 INFO L225 Difference]: With dead ends: 324 [2021-05-02 20:22:19,447 INFO L226 Difference]: Without dead ends: 324 [2021-05-02 20:22:19,447 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 8549.2ms TimeCoverageRelationStatistics Valid=68, Invalid=393, Unknown=1, NotChecked=0, Total=462 [2021-05-02 20:22:19,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-05-02 20:22:19,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 319. [2021-05-02 20:22:19,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 206 states have (on average 1.2184466019417475) internal successors, (251), 215 states have internal predecessors, (251), 82 states have call successors, (82), 31 states have call predecessors, (82), 30 states have return successors, (79), 72 states have call predecessors, (79), 79 states have call successors, (79) [2021-05-02 20:22:19,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 412 transitions. [2021-05-02 20:22:19,456 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 412 transitions. Word has length 105 [2021-05-02 20:22:19,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:22:19,456 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 412 transitions. [2021-05-02 20:22:19,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-02 20:22:19,457 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 412 transitions. [2021-05-02 20:22:19,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-02 20:22:19,457 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:22:19,458 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:22:19,676 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:22:19,677 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:22:19,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:22:19,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1212495288, now seen corresponding path program 2 times [2021-05-02 20:22:19,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:22:19,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785957299] [2021-05-02 20:22:19,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:22:19,683 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:22:19,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [178825489] [2021-05-02 20:22:19,684 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:22:19,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:22:19,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:22:19,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 66 conjunts are in the unsatisfiable core [2021-05-02 20:22:19,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:22:19,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:19,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:20,172 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2021-05-02 20:22:20,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:20,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:20,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:20,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:20,455 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-05-02 20:22:20,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:20,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:20,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:20,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:20,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:20,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:20,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:20,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:20,816 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2021-05-02 20:22:20,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:20,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:20,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:20,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:21,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:21,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:21,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:21,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:21,650 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-05-02 20:22:21,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:21,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:21,997 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-05-02 20:22:21,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:22,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:22,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:22,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:22,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:22,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:22,662 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-05-02 20:22:22,966 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2021-05-02 20:22:23,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:23,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:23,694 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 69 proven. 69 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-05-02 20:22:23,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:22:23,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785957299] [2021-05-02 20:22:23,694 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:22:23,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178825489] [2021-05-02 20:22:23,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178825489] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:22:23,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:22:23,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 20:22:23,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79852443] [2021-05-02 20:22:23,695 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 20:22:23,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:22:23,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 20:22:23,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:22:23,696 INFO L87 Difference]: Start difference. First operand 319 states and 412 transitions. Second operand has 17 states, 16 states have (on average 2.1875) internal successors, (35), 14 states have internal predecessors, (35), 8 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 7 states have call successors, (17) [2021-05-02 20:22:28,248 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-05-02 20:22:29,184 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-05-02 20:22:29,811 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2021-05-02 20:22:31,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:22:31,425 INFO L93 Difference]: Finished difference Result 351 states and 456 transitions. [2021-05-02 20:22:31,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 20:22:31,427 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 14 states have internal predecessors, (35), 8 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 7 states have call successors, (17) Word has length 107 [2021-05-02 20:22:31,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:22:31,429 INFO L225 Difference]: With dead ends: 351 [2021-05-02 20:22:31,429 INFO L226 Difference]: Without dead ends: 350 [2021-05-02 20:22:31,429 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 5085.7ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-05-02 20:22:31,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-05-02 20:22:31,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 345. [2021-05-02 20:22:31,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 221 states have (on average 1.2217194570135748) internal successors, (270), 231 states have internal predecessors, (270), 91 states have call successors, (91), 33 states have call predecessors, (91), 32 states have return successors, (88), 80 states have call predecessors, (88), 88 states have call successors, (88) [2021-05-02 20:22:31,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 449 transitions. [2021-05-02 20:22:31,439 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 449 transitions. Word has length 107 [2021-05-02 20:22:31,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:22:31,439 INFO L480 AbstractCegarLoop]: Abstraction has 345 states and 449 transitions. [2021-05-02 20:22:31,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 14 states have internal predecessors, (35), 8 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 7 states have call successors, (17) [2021-05-02 20:22:31,439 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 449 transitions. [2021-05-02 20:22:31,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-05-02 20:22:31,440 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:22:31,440 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:22:31,640 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-02 20:22:31,641 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:22:31,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:22:31,641 INFO L82 PathProgramCache]: Analyzing trace with hash 2102989309, now seen corresponding path program 2 times [2021-05-02 20:22:31,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:22:31,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931766226] [2021-05-02 20:22:31,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:22:31,647 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:22:31,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [697695244] [2021-05-02 20:22:31,647 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:22:31,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:22:31,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:22:31,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 20:22:31,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:22:31,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:31,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:31,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:31,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:31,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:31,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:31,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:31,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:31,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:31,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:31,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:31,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:32,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:32,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:32,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:32,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:32,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:32,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:32,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:32,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:32,439 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 246 proven. 3 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-05-02 20:22:32,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:22:32,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931766226] [2021-05-02 20:22:32,439 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:22:32,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697695244] [2021-05-02 20:22:32,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697695244] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:22:32,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:22:32,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:22:32,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795179716] [2021-05-02 20:22:32,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:22:32,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:22:32,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:22:32,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:22:32,442 INFO L87 Difference]: Start difference. First operand 345 states and 449 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-02 20:22:33,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:22:33,336 INFO L93 Difference]: Finished difference Result 242 states and 265 transitions. [2021-05-02 20:22:33,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:22:33,337 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) Word has length 109 [2021-05-02 20:22:33,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:22:33,337 INFO L225 Difference]: With dead ends: 242 [2021-05-02 20:22:33,338 INFO L226 Difference]: Without dead ends: 242 [2021-05-02 20:22:33,338 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 555.7ms TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:22:33,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-05-02 20:22:33,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 222. [2021-05-02 20:22:33,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 155 states have (on average 1.096774193548387) internal successors, (170), 157 states have internal predecessors, (170), 37 states have call successors, (37), 30 states have call predecessors, (37), 29 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-05-02 20:22:33,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 241 transitions. [2021-05-02 20:22:33,343 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 241 transitions. Word has length 109 [2021-05-02 20:22:33,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:22:33,343 INFO L480 AbstractCegarLoop]: Abstraction has 222 states and 241 transitions. [2021-05-02 20:22:33,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-02 20:22:33,343 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 241 transitions. [2021-05-02 20:22:33,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-02 20:22:33,344 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:22:33,344 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:22:33,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-02 20:22:33,565 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:22:33,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:22:33,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1392800366, now seen corresponding path program 2 times [2021-05-02 20:22:33,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:22:33,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474633958] [2021-05-02 20:22:33,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:22:33,570 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:22:33,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1398002687] [2021-05-02 20:22:33,570 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:22:33,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:22:33,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-05-02 20:22:33,654 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 20:22:33,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 20:22:33,694 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 20:22:33,839 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-02 20:22:33,839 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 20:22:34,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-02 20:22:34,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:22:34 BasicIcfg [2021-05-02 20:22:34,126 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 20:22:34,126 INFO L168 Benchmark]: Toolchain (without parser) took 69056.36 ms. Allocated memory was 176.2 MB in the beginning and 254.8 MB in the end (delta: 78.6 MB). Free memory was 141.6 MB in the beginning and 153.7 MB in the end (delta: -12.1 MB). Peak memory consumption was 67.4 MB. Max. memory is 8.0 GB. [2021-05-02 20:22:34,126 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 176.2 MB. Free memory was 158.3 MB in the beginning and 158.2 MB in the end (delta: 89.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:22:34,126 INFO L168 Benchmark]: CACSL2BoogieTranslator took 234.10 ms. Allocated memory is still 176.2 MB. Free memory was 141.2 MB in the beginning and 159.5 MB in the end (delta: -18.2 MB). Peak memory consumption was 12.8 MB. Max. memory is 8.0 GB. [2021-05-02 20:22:34,126 INFO L168 Benchmark]: Boogie Preprocessor took 23.96 ms. Allocated memory is still 176.2 MB. Free memory was 159.5 MB in the beginning and 157.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:22:34,126 INFO L168 Benchmark]: RCFGBuilder took 325.43 ms. Allocated memory is still 176.2 MB. Free memory was 157.9 MB in the beginning and 140.6 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-05-02 20:22:34,126 INFO L168 Benchmark]: IcfgTransformer took 18.26 ms. Allocated memory is still 176.2 MB. Free memory was 140.1 MB in the beginning and 139.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:22:34,127 INFO L168 Benchmark]: TraceAbstraction took 68449.98 ms. Allocated memory was 176.2 MB in the beginning and 254.8 MB in the end (delta: 78.6 MB). Free memory was 138.5 MB in the beginning and 153.7 MB in the end (delta: -15.2 MB). Peak memory consumption was 64.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:22:34,127 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 176.2 MB. Free memory was 158.3 MB in the beginning and 158.2 MB in the end (delta: 89.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 234.10 ms. Allocated memory is still 176.2 MB. Free memory was 141.2 MB in the beginning and 159.5 MB in the end (delta: -18.2 MB). Peak memory consumption was 12.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 23.96 ms. Allocated memory is still 176.2 MB. Free memory was 159.5 MB in the beginning and 157.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 325.43 ms. Allocated memory is still 176.2 MB. Free memory was 157.9 MB in the beginning and 140.6 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * IcfgTransformer took 18.26 ms. Allocated memory is still 176.2 MB. Free memory was 140.1 MB in the beginning and 139.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 68449.98 ms. Allocated memory was 176.2 MB in the beginning and 254.8 MB in the end (delta: 78.6 MB). Free memory was 138.5 MB in the beginning and 153.7 MB in the end (delta: -15.2 MB). Peak memory consumption was 64.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; VAL [\old(counter)=14, counter=0] [L20] int x, y; [L21] long long a, b, p, q, r, s, c, k, xy, yy; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L24] RET assume_abort_if_not(x >= 1) VAL [\old(counter)=0, counter=0, x=2, y=3] [L25] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L25] RET assume_abort_if_not(y >= 1) VAL [\old(counter)=0, counter=0, x=2, y=3] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 [L33] c = 0 [L34] k = 0 [L35] xy = (long long) x * y [L36] yy = (long long) y * y VAL [\old(counter)=0, a=2, b=3, c=0, counter=0, k=0, p=1, q=0, r=0, s=1, x=2, xy=6, y=3, yy=9] [L37] CALL assume_abort_if_not(xy < 2147483647) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L37] RET assume_abort_if_not(xy < 2147483647) VAL [\old(counter)=0, a=2, b=3, c=0, counter=0, k=0, p=1, q=0, r=0, s=1, x=2, xy=6, y=3, yy=9] [L38] CALL assume_abort_if_not(yy < 2147483647) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L38] RET assume_abort_if_not(yy < 2147483647) VAL [\old(counter)=0, a=2, b=3, c=0, counter=0, k=0, p=1, q=0, r=0, s=1, x=2, xy=6, y=3, yy=9] [L40] EXPR counter++ VAL [\old(counter)=0, a=2, b=3, c=0, counter=1, counter++=0, k=0, p=1, q=0, r=0, s=1, x=2, xy=6, y=3, yy=9] [L40] COND TRUE counter++<5 [L41] COND FALSE !(!(b != 0)) [L43] c = a [L44] k = 0 VAL [\old(counter)=0, a=2, b=3, c=2, counter=1, k=0, p=1, q=0, r=0, s=1, x=2, xy=6, y=3, yy=9] [L46] EXPR counter++ VAL [\old(counter)=0, a=2, b=3, c=2, counter=2, counter++=1, k=0, p=1, q=0, r=0, s=1, x=2, xy=6, y=3, yy=9] [L46] COND TRUE counter++<5 [L47] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L47] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=2, b=3, c=2, counter=2, k=0, p=1, q=0, r=0, s=1, x=2, xy=6, y=3, yy=9] [L48] CALL __VERIFIER_assert(a == y*r + x*p) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L48] RET __VERIFIER_assert(a == y*r + x*p) VAL [\old(counter)=0, a=2, b=3, c=2, counter=2, k=0, p=1, q=0, r=0, s=1, x=2, xy=6, y=3, yy=9] [L49] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L49] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=2, b=3, c=2, counter=2, k=0, p=1, q=0, r=0, s=1, x=2, xy=6, y=3, yy=9] [L50] CALL __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L50] RET __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [\old(counter)=0, a=2, b=3, c=2, counter=2, k=0, p=1, q=0, r=0, s=1, x=2, xy=6, y=3, yy=9] [L51] COND TRUE !(c >= b) VAL [\old(counter)=0, a=2, b=3, c=2, counter=2, k=0, p=1, q=0, r=0, s=1, x=2, xy=6, y=3, yy=9] [L57] a = b [L58] b = c [L60] long long temp; [L61] temp = p [L62] p = q [L63] q = temp - q * k [L64] temp = r [L65] r = s [L66] s = temp - s * k VAL [\old(counter)=0, a=3, b=2, c=2, counter=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=2, xy=6, y=3, yy=9] [L40] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=2, counter=3, counter++=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=2, xy=6, y=3, yy=9] [L40] COND TRUE counter++<5 [L41] COND FALSE !(!(b != 0)) [L43] c = a [L44] k = 0 VAL [\old(counter)=0, a=3, b=2, c=3, counter=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=2, xy=6, y=3, yy=9] [L46] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=3, counter=4, counter++=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=2, xy=6, y=3, yy=9] [L46] COND TRUE counter++<5 [L47] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L47] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=3, b=2, c=3, counter=4, k=0, p=0, q=1, r=1, s=0, temp=0, x=2, xy=6, y=3, yy=9] [L48] CALL __VERIFIER_assert(a == y*r + x*p) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L48] RET __VERIFIER_assert(a == y*r + x*p) VAL [\old(counter)=0, a=3, b=2, c=3, counter=4, k=0, p=0, q=1, r=1, s=0, temp=0, x=2, xy=6, y=3, yy=9] [L49] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L49] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=3, b=2, c=3, counter=4, k=0, p=0, q=1, r=1, s=0, temp=0, x=2, xy=6, y=3, yy=9] [L50] CALL __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L50] RET __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [\old(counter)=0, a=3, b=2, c=3, counter=4, k=0, p=0, q=1, r=1, s=0, temp=0, x=2, xy=6, y=3, yy=9] [L51] COND FALSE !(!(c >= b)) [L53] c = c - b [L54] k = k + 1 VAL [\old(counter)=0, a=3, b=2, c=1, counter=4, k=1, p=0, q=1, r=1, s=0, temp=0, x=2, xy=6, y=3, yy=9] [L46] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=1, counter=5, counter++=4, k=1, p=0, q=1, r=1, s=0, temp=0, x=2, xy=6, y=3, yy=9] [L46] COND TRUE counter++<5 [L47] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L47] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=3, b=2, c=1, counter=5, k=1, p=0, q=1, r=1, s=0, temp=0, x=2, xy=6, y=3, yy=9] [L48] CALL __VERIFIER_assert(a == y*r + x*p) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L48] RET __VERIFIER_assert(a == y*r + x*p) VAL [\old(counter)=0, a=3, b=2, c=1, counter=5, k=1, p=0, q=1, r=1, s=0, temp=0, x=2, xy=6, y=3, yy=9] [L49] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L49] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=3, b=2, c=1, counter=5, k=1, p=0, q=1, r=1, s=0, temp=0, x=2, xy=6, y=3, yy=9] [L50] CALL __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L50] RET __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [\old(counter)=0, a=3, b=2, c=1, counter=5, k=1, p=0, q=1, r=1, s=0, temp=0, x=2, xy=6, y=3, yy=9] [L51] COND TRUE !(c >= b) VAL [\old(counter)=0, a=3, b=2, c=1, counter=5, k=1, p=0, q=1, r=1, s=0, temp=0, x=2, xy=6, y=3, yy=9] [L57] a = b [L58] b = c [L60] long long temp; [L61] temp = p [L62] p = q [L63] q = temp - q * k [L64] temp = r [L65] r = s [L66] s = temp - s * k VAL [\old(counter)=0, a=2, b=1, c=1, counter=5, k=1, p=1, q=-1, r=0, s=1, temp=1, x=2, xy=6, y=3, yy=9] [L40] EXPR counter++ VAL [\old(counter)=0, a=2, b=1, c=1, counter=6, counter++=5, k=1, p=1, q=-1, r=0, s=1, temp=1, x=2, xy=6, y=3, yy=9] [L40] COND FALSE !(counter++<5) [L70] CALL __VERIFIER_assert(q*x + s*y == 0) VAL [\old(cond)=0, \old(counter)=0, counter=6] [L11] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=6] [L13] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 68346.0ms, OverallIterations: 27, TraceHistogramMax: 13, EmptinessCheckTime: 34.1ms, AutomataDifference: 47507.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1251 SDtfs, 897 SDslu, 5214 SDs, 0 SdLazy, 4570 SolverSat, 709 SolverUnsat, 10 SolverUnknown, 0 SolverNotchecked, 36307.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1832 GetRequests, 1563 SyntacticMatches, 6 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 16266.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=345occurred in iteration=25, InterpolantAutomatonStates: 250, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 242.8ms AutomataMinimizationTime, 26 MinimizatonAttempts, 151 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 317.5ms SsaConstructionTime, 897.7ms SatisfiabilityAnalysisTime, 12053.5ms InterpolantComputationTime, 1889 NumberOfCodeBlocks, 1839 NumberOfCodeBlocksAsserted, 39 NumberOfCheckSat, 1753 ConstructedInterpolants, 11 QuantifiedInterpolants, 8265 SizeOfPredicates, 125 NumberOfNonLiveVariables, 6194 ConjunctsInSsa, 593 ConjunctsInUnsatCore, 26 InterpolantComputations, 4 PerfectInterpolantSequences, 2558/3158 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 RESULT: Ultimate proved your program to be incorrect! [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process Received shutdown request...