/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:20:19,230 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:20:19,232 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:20:19,271 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 08:20:19,271 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 08:20:19,274 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 08:20:19,277 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 08:20:19,282 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 08:20:19,284 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 08:20:19,288 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 08:20:19,289 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 08:20:19,292 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 08:20:19,292 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:20:19,294 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:20:19,295 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:20:19,297 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:20:19,297 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:20:19,298 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:20:19,302 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:20:19,307 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:20:19,308 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:20:19,309 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:20:19,310 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:20:19,311 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:20:19,317 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 08:20:19,326 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:20:19,351 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:20:19,352 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:20:19,356 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:20:19,371 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:20:19,371 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:20:19,374 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:20:19,375 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:20:19,375 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:20:19,375 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:20:19,375 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:20:19,375 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:20:19,375 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:20:19,376 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:20:19,376 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:20:19,377 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:20:19,377 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:20:19,377 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:20:19,377 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:20:19,377 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:20:19,378 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:20:19,378 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:20:19,378 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:20:19,378 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:20:19,378 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:20:19,380 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:20:19,380 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:20:19,720 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:20:19,755 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:20:19,758 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:20:19,758 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:20:19,759 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:20:19,760 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound10.c [2021-05-06 08:20:19,821 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b7d20abd/656efe43484343a4947d484e81defc4b/FLAG2af30d630 [2021-05-06 08:20:20,231 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:20:20,232 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound10.c [2021-05-06 08:20:20,238 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b7d20abd/656efe43484343a4947d484e81defc4b/FLAG2af30d630 [2021-05-06 08:20:20,629 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b7d20abd/656efe43484343a4947d484e81defc4b [2021-05-06 08:20:20,636 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:20:20,638 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:20:20,643 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:20:20,643 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:20:20,646 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:20:20,647 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:20:20" (1/1) ... [2021-05-06 08:20:20,648 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bf6c2e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:20:20, skipping insertion in model container [2021-05-06 08:20:20,648 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:20:20" (1/1) ... [2021-05-06 08:20:20,653 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:20:20,668 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:20:20,768 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound10.c[490,503] [2021-05-06 08:20:20,827 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:20:20,843 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:20:20,854 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound10.c[490,503] [2021-05-06 08:20:20,879 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:20:20,890 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:20:20,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:20:20 WrapperNode [2021-05-06 08:20:20,891 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:20:20,892 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:20:20,892 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:20:20,892 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:20:20,904 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:20:20" (1/1) ... [2021-05-06 08:20:20,904 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:20:20" (1/1) ... [2021-05-06 08:20:20,919 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:20:20" (1/1) ... [2021-05-06 08:20:20,919 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:20:20" (1/1) ... [2021-05-06 08:20:20,928 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:20:20" (1/1) ... [2021-05-06 08:20:20,932 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:20:20" (1/1) ... [2021-05-06 08:20:20,933 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:20:20" (1/1) ... [2021-05-06 08:20:20,934 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:20:20,935 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:20:20,935 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:20:20,935 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:20:20,936 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:20:20" (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 [2021-05-06 08:20:21,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:20:21,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:20:21,018 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:20:21,018 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:20:21,018 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:20:21,019 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:20:21,019 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:20:21,019 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:20:21,019 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:20:21,020 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:20:21,020 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 08:20:21,020 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:20:21,020 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:20:21,020 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:20:21,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:20:21,021 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:20:21,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:20:21,022 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:20:21,022 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:20:21,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:20:21,273 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:20:21,273 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-06 08:20:21,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:20:21 BoogieIcfgContainer [2021-05-06 08:20:21,274 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:20:21,275 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:20:21,275 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:20:21,276 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:20:21,278 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:20:21" (1/1) ... [2021-05-06 08:20:21,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:20:21 BasicIcfg [2021-05-06 08:20:21,291 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:20:21,293 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:20:21,293 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:20:21,295 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:20:21,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:20:20" (1/4) ... [2021-05-06 08:20:21,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aeaae95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:20:21, skipping insertion in model container [2021-05-06 08:20:21,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:20:20" (2/4) ... [2021-05-06 08:20:21,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aeaae95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:20:21, skipping insertion in model container [2021-05-06 08:20:21,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:20:21" (3/4) ... [2021-05-06 08:20:21,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aeaae95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:20:21, skipping insertion in model container [2021-05-06 08:20:21,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:20:21" (4/4) ... [2021-05-06 08:20:21,298 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound10.cJordan [2021-05-06 08:20:21,302 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:20:21,306 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:20:21,319 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:20:21,335 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:20:21,335 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:20:21,335 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:20:21,335 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:20:21,335 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:20:21,335 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:20:21,335 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:20:21,335 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:20:21,346 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 08:20:21,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 08:20:21,352 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:21,352 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:21,352 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:21,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:21,357 INFO L82 PathProgramCache]: Analyzing trace with hash 6304412, now seen corresponding path program 1 times [2021-05-06 08:20:21,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:21,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295521937] [2021-05-06 08:20:21,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:21,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:21,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:20:21,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:21,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:20:21,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:21,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 08:20:21,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:21,663 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:20:21,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:21,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295521937] [2021-05-06 08:20:21,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295521937] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:20:21,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:20:21,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 08:20:21,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714678369] [2021-05-06 08:20:21,669 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 08:20:21,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:21,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 08:20:21,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:20:21,681 INFO L87 Difference]: Start difference. First operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:20:21,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:21,848 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2021-05-06 08:20:21,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 08:20:21,851 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-06 08:20:21,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:21,857 INFO L225 Difference]: With dead ends: 41 [2021-05-06 08:20:21,857 INFO L226 Difference]: Without dead ends: 36 [2021-05-06 08:20:21,858 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 61.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:20:21,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-06 08:20:21,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-05-06 08:20:21,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 08:20:21,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2021-05-06 08:20:21,895 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 22 [2021-05-06 08:20:21,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:21,895 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2021-05-06 08:20:21,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:20:21,896 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2021-05-06 08:20:21,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 08:20:21,898 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:21,898 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:21,898 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 08:20:21,899 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:21,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:21,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1535904754, now seen corresponding path program 1 times [2021-05-06 08:20:21,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:21,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581270692] [2021-05-06 08:20:21,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:21,944 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:21,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [841364475] [2021-05-06 08:20:21,945 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 [2021-05-06 08:20:22,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:22,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:20:22,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:22,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:22,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:22,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:22,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:22,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:22,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:20:22,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:22,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581270692] [2021-05-06 08:20:22,144 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:22,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841364475] [2021-05-06 08:20:22,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841364475] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:20:22,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:20:22,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 08:20:22,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336886110] [2021-05-06 08:20:22,146 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 08:20:22,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:22,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 08:20:22,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:20:22,147 INFO L87 Difference]: Start difference. First operand 35 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:20:22,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:22,160 INFO L93 Difference]: Finished difference Result 37 states and 47 transitions. [2021-05-06 08:20:22,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 08:20:22,161 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 08:20:22,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:22,162 INFO L225 Difference]: With dead ends: 37 [2021-05-06 08:20:22,162 INFO L226 Difference]: Without dead ends: 37 [2021-05-06 08:20:22,163 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:20:22,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-06 08:20:22,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-06 08:20:22,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 08:20:22,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2021-05-06 08:20:22,168 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 23 [2021-05-06 08:20:22,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:22,169 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2021-05-06 08:20:22,169 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:20:22,169 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2021-05-06 08:20:22,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-06 08:20:22,170 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:22,170 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:22,383 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 08:20:22,383 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:22,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:22,384 INFO L82 PathProgramCache]: Analyzing trace with hash 401530880, now seen corresponding path program 1 times [2021-05-06 08:20:22,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:22,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102086449] [2021-05-06 08:20:22,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:22,411 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:22,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [850150625] [2021-05-06 08:20:22,411 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 [2021-05-06 08:20:22,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:22,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:20:22,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:22,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:22,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 08:20:22,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:22,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102086449] [2021-05-06 08:20:22,569 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:22,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850150625] [2021-05-06 08:20:22,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850150625] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:20:22,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:20:22,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 08:20:22,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791346760] [2021-05-06 08:20:22,570 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:20:22,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:22,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:20:22,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:20:22,571 INFO L87 Difference]: Start difference. First operand 37 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), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 08:20:22,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:22,647 INFO L93 Difference]: Finished difference Result 50 states and 68 transitions. [2021-05-06 08:20:22,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:20:22,648 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2021-05-06 08:20:22,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:22,649 INFO L225 Difference]: With dead ends: 50 [2021-05-06 08:20:22,649 INFO L226 Difference]: Without dead ends: 50 [2021-05-06 08:20:22,650 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 34.0ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:20:22,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-06 08:20:22,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2021-05-06 08:20:22,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 08:20:22,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2021-05-06 08:20:22,656 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 24 [2021-05-06 08:20:22,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:22,657 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2021-05-06 08:20:22,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 08:20:22,657 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2021-05-06 08:20:22,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 08:20:22,658 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:22,658 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-06 08:20:22,882 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:22,883 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:22,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:22,883 INFO L82 PathProgramCache]: Analyzing trace with hash 2110136122, now seen corresponding path program 1 times [2021-05-06 08:20:22,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:22,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889049600] [2021-05-06 08:20:22,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:22,902 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:22,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1729974742] [2021-05-06 08:20:22,903 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 [2021-05-06 08:20:22,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:22,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:20:22,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:23,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:23,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:23,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:23,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:23,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:23,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:23,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:23,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:23,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:20:23,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:23,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889049600] [2021-05-06 08:20:23,073 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:23,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729974742] [2021-05-06 08:20:23,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729974742] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:20:23,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:20:23,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:20:23,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872451155] [2021-05-06 08:20:23,075 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:20:23,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:23,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:20:23,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:20:23,076 INFO L87 Difference]: Start difference. First operand 38 states and 48 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:20:23,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:23,103 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2021-05-06 08:20:23,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:20:23,104 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-05-06 08:20:23,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:23,105 INFO L225 Difference]: With dead ends: 40 [2021-05-06 08:20:23,105 INFO L226 Difference]: Without dead ends: 40 [2021-05-06 08:20:23,105 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.8ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:20:23,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-06 08:20:23,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-05-06 08:20:23,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 08:20:23,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2021-05-06 08:20:23,110 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 29 [2021-05-06 08:20:23,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:23,110 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2021-05-06 08:20:23,111 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:20:23,111 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2021-05-06 08:20:23,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 08:20:23,112 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:23,112 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:23,332 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:23,333 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:23,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:23,334 INFO L82 PathProgramCache]: Analyzing trace with hash -358604865, now seen corresponding path program 1 times [2021-05-06 08:20:23,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:23,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420706508] [2021-05-06 08:20:23,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:23,350 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:23,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [311202646] [2021-05-06 08:20:23,351 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 [2021-05-06 08:20:23,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:23,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:20:23,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:23,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:23,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:23,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:23,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 08:20:23,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:23,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420706508] [2021-05-06 08:20:23,559 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:23,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311202646] [2021-05-06 08:20:23,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311202646] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:20:23,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:20:23,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 08:20:23,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456549171] [2021-05-06 08:20:23,566 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:20:23,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:23,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:20:23,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:20:23,567 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 08:20:23,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:23,674 INFO L93 Difference]: Finished difference Result 56 states and 73 transitions. [2021-05-06 08:20:23,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:20:23,675 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), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2021-05-06 08:20:23,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:23,678 INFO L225 Difference]: With dead ends: 56 [2021-05-06 08:20:23,678 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 08:20:23,680 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 50.7ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:20:23,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 08:20:23,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-06 08:20:23,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 38 states have internal predecessors, (48), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 08:20:23,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 72 transitions. [2021-05-06 08:20:23,695 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 72 transitions. Word has length 29 [2021-05-06 08:20:23,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:23,696 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 72 transitions. [2021-05-06 08:20:23,697 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), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 08:20:23,697 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 72 transitions. [2021-05-06 08:20:23,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-06 08:20:23,698 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:23,698 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-06 08:20:23,923 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:23,923 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:23,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:23,924 INFO L82 PathProgramCache]: Analyzing trace with hash -2061673945, now seen corresponding path program 1 times [2021-05-06 08:20:23,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:23,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951333930] [2021-05-06 08:20:23,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:23,937 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:23,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1180642626] [2021-05-06 08:20:23,937 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 [2021-05-06 08:20:24,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:24,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:20:24,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:24,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:24,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:24,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:24,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:24,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:24,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:24,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:24,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:24,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:24,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:24,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:24,084 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:20:24,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:24,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951333930] [2021-05-06 08:20:24,085 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:24,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180642626] [2021-05-06 08:20:24,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180642626] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:24,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:24,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:20:24,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169536166] [2021-05-06 08:20:24,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:20:24,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:24,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:20:24,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:20:24,087 INFO L87 Difference]: Start difference. First operand 55 states and 72 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:20:24,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:24,126 INFO L93 Difference]: Finished difference Result 60 states and 78 transitions. [2021-05-06 08:20:24,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:20:24,133 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2021-05-06 08:20:24,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:24,135 INFO L225 Difference]: With dead ends: 60 [2021-05-06 08:20:24,135 INFO L226 Difference]: Without dead ends: 60 [2021-05-06 08:20:24,135 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 17.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:20:24,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-06 08:20:24,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-05-06 08:20:24,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 42 states have internal predecessors, (53), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 08:20:24,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 77 transitions. [2021-05-06 08:20:24,153 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 77 transitions. Word has length 30 [2021-05-06 08:20:24,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:24,154 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 77 transitions. [2021-05-06 08:20:24,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:20:24,154 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 77 transitions. [2021-05-06 08:20:24,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-06 08:20:24,155 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:24,155 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-06 08:20:24,368 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 08:20:24,369 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:24,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:24,369 INFO L82 PathProgramCache]: Analyzing trace with hash 545740907, now seen corresponding path program 1 times [2021-05-06 08:20:24,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:24,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247280208] [2021-05-06 08:20:24,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:24,382 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:24,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1827123457] [2021-05-06 08:20:24,383 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 [2021-05-06 08:20:24,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:24,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:20:24,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:24,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:24,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:24,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:24,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:24,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:24,549 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 08:20:24,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:24,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247280208] [2021-05-06 08:20:24,549 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:24,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827123457] [2021-05-06 08:20:24,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827123457] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:24,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:24,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:20:24,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488018800] [2021-05-06 08:20:24,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:20:24,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:24,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:20:24,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:20:24,551 INFO L87 Difference]: Start difference. First operand 59 states and 77 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:20:24,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:24,748 INFO L93 Difference]: Finished difference Result 131 states and 193 transitions. [2021-05-06 08:20:24,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:20:24,749 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2021-05-06 08:20:24,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:24,750 INFO L225 Difference]: With dead ends: 131 [2021-05-06 08:20:24,750 INFO L226 Difference]: Without dead ends: 131 [2021-05-06 08:20:24,750 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 83.4ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:20:24,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-06 08:20:24,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 88. [2021-05-06 08:20:24,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 66 states have (on average 1.3636363636363635) internal successors, (90), 67 states have internal predecessors, (90), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 08:20:24,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 122 transitions. [2021-05-06 08:20:24,759 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 122 transitions. Word has length 31 [2021-05-06 08:20:24,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:24,759 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 122 transitions. [2021-05-06 08:20:24,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:20:24,760 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 122 transitions. [2021-05-06 08:20:24,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 08:20:24,761 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:24,761 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-06 08:20:24,972 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:24,973 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:24,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:24,974 INFO L82 PathProgramCache]: Analyzing trace with hash 653912885, now seen corresponding path program 1 times [2021-05-06 08:20:24,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:24,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291646049] [2021-05-06 08:20:24,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:24,982 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:24,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [201196317] [2021-05-06 08:20:24,982 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 [2021-05-06 08:20:25,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:25,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:20:25,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:25,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:25,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:25,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:25,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:25,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:25,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 08:20:25,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:25,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291646049] [2021-05-06 08:20:25,173 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:25,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201196317] [2021-05-06 08:20:25,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201196317] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:20:25,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:20:25,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 08:20:25,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029162038] [2021-05-06 08:20:25,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:20:25,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:25,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:20:25,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:20:25,175 INFO L87 Difference]: Start difference. First operand 88 states and 122 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 08:20:25,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:25,272 INFO L93 Difference]: Finished difference Result 93 states and 126 transitions. [2021-05-06 08:20:25,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:20:25,273 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2021-05-06 08:20:25,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:25,274 INFO L225 Difference]: With dead ends: 93 [2021-05-06 08:20:25,274 INFO L226 Difference]: Without dead ends: 93 [2021-05-06 08:20:25,274 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 54.8ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:20:25,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-06 08:20:25,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-05-06 08:20:25,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 69 states have (on average 1.3478260869565217) internal successors, (93), 70 states have internal predecessors, (93), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 08:20:25,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 125 transitions. [2021-05-06 08:20:25,291 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 125 transitions. Word has length 34 [2021-05-06 08:20:25,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:25,292 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 125 transitions. [2021-05-06 08:20:25,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 08:20:25,292 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 125 transitions. [2021-05-06 08:20:25,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-06 08:20:25,293 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:25,293 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:25,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:25,497 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:25,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:25,497 INFO L82 PathProgramCache]: Analyzing trace with hash 541001134, now seen corresponding path program 1 times [2021-05-06 08:20:25,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:25,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572217625] [2021-05-06 08:20:25,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:25,509 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:25,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [139393612] [2021-05-06 08:20:25,510 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 [2021-05-06 08:20:25,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:25,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:20:25,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:25,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:25,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:25,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:25,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:25,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:25,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:25,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:25,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:25,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:25,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:25,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:25,685 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:20:25,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:25,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572217625] [2021-05-06 08:20:25,686 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:25,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139393612] [2021-05-06 08:20:25,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139393612] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:20:25,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:20:25,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 08:20:25,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190550707] [2021-05-06 08:20:25,687 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:20:25,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:25,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:20:25,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:20:25,688 INFO L87 Difference]: Start difference. First operand 92 states and 125 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:20:25,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:25,716 INFO L93 Difference]: Finished difference Result 94 states and 127 transitions. [2021-05-06 08:20:25,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:20:25,717 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), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2021-05-06 08:20:25,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:25,719 INFO L225 Difference]: With dead ends: 94 [2021-05-06 08:20:25,719 INFO L226 Difference]: Without dead ends: 94 [2021-05-06 08:20:25,719 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 13.4ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:20:25,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-06 08:20:25,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-05-06 08:20:25,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 71 states have (on average 1.3380281690140845) internal successors, (95), 72 states have internal predecessors, (95), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 08:20:25,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 127 transitions. [2021-05-06 08:20:25,724 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 127 transitions. Word has length 35 [2021-05-06 08:20:25,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:25,724 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 127 transitions. [2021-05-06 08:20:25,724 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), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:20:25,725 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 127 transitions. [2021-05-06 08:20:25,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 08:20:25,725 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:25,725 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:25,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-06 08:20:25,948 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:25,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:25,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1873858129, now seen corresponding path program 1 times [2021-05-06 08:20:25,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:25,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97952180] [2021-05-06 08:20:25,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:25,958 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:25,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1772302231] [2021-05-06 08:20:25,958 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 [2021-05-06 08:20:26,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:26,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:20:26,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:26,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:26,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:26,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:26,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:26,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:26,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:26,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:26,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:26,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:26,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:26,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:26,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:26,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:26,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:26,127 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:20:26,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:26,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97952180] [2021-05-06 08:20:26,128 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:26,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772302231] [2021-05-06 08:20:26,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772302231] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:26,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:26,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:20:26,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971835515] [2021-05-06 08:20:26,129 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:20:26,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:26,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:20:26,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:20:26,129 INFO L87 Difference]: Start difference. First operand 94 states and 127 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:20:26,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:26,186 INFO L93 Difference]: Finished difference Result 120 states and 155 transitions. [2021-05-06 08:20:26,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:20:26,187 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-05-06 08:20:26,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:26,188 INFO L225 Difference]: With dead ends: 120 [2021-05-06 08:20:26,188 INFO L226 Difference]: Without dead ends: 120 [2021-05-06 08:20:26,188 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 23.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:20:26,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-05-06 08:20:26,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2021-05-06 08:20:26,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 87 states have (on average 1.2988505747126438) internal successors, (113), 88 states have internal predecessors, (113), 21 states have call successors, (21), 9 states have call predecessors, (21), 8 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-06 08:20:26,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 153 transitions. [2021-05-06 08:20:26,194 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 153 transitions. Word has length 36 [2021-05-06 08:20:26,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:26,195 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 153 transitions. [2021-05-06 08:20:26,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:20:26,195 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 153 transitions. [2021-05-06 08:20:26,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 08:20:26,196 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:26,196 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-06 08:20:26,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:26,417 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:26,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:26,417 INFO L82 PathProgramCache]: Analyzing trace with hash -47631820, now seen corresponding path program 1 times [2021-05-06 08:20:26,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:26,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067708704] [2021-05-06 08:20:26,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:26,428 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:26,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1621926345] [2021-05-06 08:20:26,428 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 [2021-05-06 08:20:26,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:26,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 08:20:26,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:26,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:26,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:26,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:26,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:26,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:26,641 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 08:20:26,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:26,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067708704] [2021-05-06 08:20:26,642 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:26,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621926345] [2021-05-06 08:20:26,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621926345] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:26,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:26,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:20:26,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721606587] [2021-05-06 08:20:26,643 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:20:26,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:26,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:20:26,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:20:26,644 INFO L87 Difference]: Start difference. First operand 117 states and 153 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:20:26,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:26,769 INFO L93 Difference]: Finished difference Result 152 states and 206 transitions. [2021-05-06 08:20:26,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:20:26,769 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-05-06 08:20:26,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:26,770 INFO L225 Difference]: With dead ends: 152 [2021-05-06 08:20:26,770 INFO L226 Difference]: Without dead ends: 152 [2021-05-06 08:20:26,771 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 60.8ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:20:26,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-05-06 08:20:26,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 148. [2021-05-06 08:20:26,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 109 states have (on average 1.3394495412844036) internal successors, (146), 110 states have internal predecessors, (146), 29 states have call successors, (29), 10 states have call predecessors, (29), 9 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-06 08:20:26,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 202 transitions. [2021-05-06 08:20:26,777 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 202 transitions. Word has length 36 [2021-05-06 08:20:26,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:26,778 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 202 transitions. [2021-05-06 08:20:26,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:20:26,778 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 202 transitions. [2021-05-06 08:20:26,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 08:20:26,779 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:26,779 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:27,001 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:27,002 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:27,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:27,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1011444142, now seen corresponding path program 2 times [2021-05-06 08:20:27,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:27,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026330271] [2021-05-06 08:20:27,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:27,012 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:27,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1745152282] [2021-05-06 08:20:27,012 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 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 [2021-05-06 08:20:27,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:20:27,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:20:27,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 08:20:27,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:27,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:27,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:27,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:27,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:27,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:27,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:27,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:27,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:27,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:27,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:27,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:27,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:27,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:27,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:27,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:27,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:27,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:27,209 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:20:27,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:27,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026330271] [2021-05-06 08:20:27,209 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:27,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745152282] [2021-05-06 08:20:27,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745152282] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:27,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:27,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:20:27,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897304441] [2021-05-06 08:20:27,210 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:20:27,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:27,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:20:27,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:20:27,212 INFO L87 Difference]: Start difference. First operand 148 states and 202 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:20:27,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:27,304 INFO L93 Difference]: Finished difference Result 182 states and 239 transitions. [2021-05-06 08:20:27,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:20:27,304 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), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2021-05-06 08:20:27,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:27,307 INFO L225 Difference]: With dead ends: 182 [2021-05-06 08:20:27,307 INFO L226 Difference]: Without dead ends: 182 [2021-05-06 08:20:27,307 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 32.9ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:20:27,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-05-06 08:20:27,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 173. [2021-05-06 08:20:27,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 127 states have (on average 1.31496062992126) internal successors, (167), 129 states have internal predecessors, (167), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 08:20:27,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 231 transitions. [2021-05-06 08:20:27,314 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 231 transitions. Word has length 37 [2021-05-06 08:20:27,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:27,314 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 231 transitions. [2021-05-06 08:20:27,314 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), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:20:27,314 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 231 transitions. [2021-05-06 08:20:27,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 08:20:27,315 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:27,315 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:27,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 08:20:27,521 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:27,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:27,521 INFO L82 PathProgramCache]: Analyzing trace with hash -344890017, now seen corresponding path program 1 times [2021-05-06 08:20:27,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:27,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137580508] [2021-05-06 08:20:27,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:27,530 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:27,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [899362322] [2021-05-06 08:20:27,530 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 [2021-05-06 08:20:27,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:27,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:20:27,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:27,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:27,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:27,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:27,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:27,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:27,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:27,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:27,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:27,705 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-06 08:20:27,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:27,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137580508] [2021-05-06 08:20:27,705 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:27,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899362322] [2021-05-06 08:20:27,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899362322] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:20:27,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:20:27,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-06 08:20:27,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770380640] [2021-05-06 08:20:27,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:20:27,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:27,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:20:27,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:20:27,707 INFO L87 Difference]: Start difference. First operand 173 states and 231 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 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) [2021-05-06 08:20:27,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:27,826 INFO L93 Difference]: Finished difference Result 193 states and 254 transitions. [2021-05-06 08:20:27,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:20:27,827 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 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 39 [2021-05-06 08:20:27,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:27,829 INFO L225 Difference]: With dead ends: 193 [2021-05-06 08:20:27,830 INFO L226 Difference]: Without dead ends: 193 [2021-05-06 08:20:27,830 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 57.9ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:20:27,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-05-06 08:20:27,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2021-05-06 08:20:27,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 139 states have (on average 1.3021582733812949) internal successors, (181), 141 states have internal predecessors, (181), 37 states have call successors, (37), 16 states have call predecessors, (37), 15 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-06 08:20:27,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 253 transitions. [2021-05-06 08:20:27,837 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 253 transitions. Word has length 39 [2021-05-06 08:20:27,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:27,837 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 253 transitions. [2021-05-06 08:20:27,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 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) [2021-05-06 08:20:27,838 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 253 transitions. [2021-05-06 08:20:27,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-06 08:20:27,838 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:27,838 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-06 08:20:28,045 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 08:20:28,045 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:28,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:28,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1057809952, now seen corresponding path program 1 times [2021-05-06 08:20:28,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:28,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899050330] [2021-05-06 08:20:28,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:28,053 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:28,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1255387317] [2021-05-06 08:20:28,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-06 08:20:28,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:28,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-06 08:20:28,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:28,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,296 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:20:28,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:28,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899050330] [2021-05-06 08:20:28,296 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:28,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255387317] [2021-05-06 08:20:28,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255387317] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:28,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:28,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:20:28,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721796338] [2021-05-06 08:20:28,297 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:20:28,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:28,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:20:28,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:20:28,297 INFO L87 Difference]: Start difference. First operand 192 states and 253 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 08:20:28,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:28,524 INFO L93 Difference]: Finished difference Result 202 states and 261 transitions. [2021-05-06 08:20:28,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:20:28,524 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2021-05-06 08:20:28,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:28,527 INFO L225 Difference]: With dead ends: 202 [2021-05-06 08:20:28,527 INFO L226 Difference]: Without dead ends: 202 [2021-05-06 08:20:28,528 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 95.6ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:20:28,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-05-06 08:20:28,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2021-05-06 08:20:28,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 145 states have (on average 1.289655172413793) internal successors, (187), 147 states have internal predecessors, (187), 37 states have call successors, (37), 18 states have call predecessors, (37), 17 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-06 08:20:28,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 259 transitions. [2021-05-06 08:20:28,536 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 259 transitions. Word has length 41 [2021-05-06 08:20:28,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:28,536 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 259 transitions. [2021-05-06 08:20:28,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 08:20:28,536 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 259 transitions. [2021-05-06 08:20:28,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 08:20:28,537 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:28,537 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:28,749 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 08:20:28,749 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:28,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:28,749 INFO L82 PathProgramCache]: Analyzing trace with hash -800046763, now seen corresponding path program 1 times [2021-05-06 08:20:28,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:28,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211526613] [2021-05-06 08:20:28,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:28,757 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:28,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1491519374] [2021-05-06 08:20:28,757 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 [2021-05-06 08:20:28,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:28,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:20:28,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:28,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,910 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 08:20:28,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:28,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211526613] [2021-05-06 08:20:28,911 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:28,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491519374] [2021-05-06 08:20:28,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491519374] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:20:28,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:20:28,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:20:28,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756614674] [2021-05-06 08:20:28,912 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:20:28,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:28,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:20:28,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:20:28,912 INFO L87 Difference]: Start difference. First operand 200 states and 259 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 08:20:28,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:28,958 INFO L93 Difference]: Finished difference Result 262 states and 359 transitions. [2021-05-06 08:20:28,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:20:28,958 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 44 [2021-05-06 08:20:28,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:28,960 INFO L225 Difference]: With dead ends: 262 [2021-05-06 08:20:28,960 INFO L226 Difference]: Without dead ends: 262 [2021-05-06 08:20:28,960 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:20:28,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-05-06 08:20:28,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 234. [2021-05-06 08:20:28,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 158 states have (on average 1.2911392405063291) internal successors, (204), 165 states have internal predecessors, (204), 57 states have call successors, (57), 19 states have call predecessors, (57), 18 states have return successors, (55), 49 states have call predecessors, (55), 55 states have call successors, (55) [2021-05-06 08:20:28,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 316 transitions. [2021-05-06 08:20:28,971 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 316 transitions. Word has length 44 [2021-05-06 08:20:28,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:28,971 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 316 transitions. [2021-05-06 08:20:28,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 08:20:28,971 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 316 transitions. [2021-05-06 08:20:28,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 08:20:28,972 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:28,972 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:29,184 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:29,185 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:29,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:29,185 INFO L82 PathProgramCache]: Analyzing trace with hash -982799261, now seen corresponding path program 1 times [2021-05-06 08:20:29,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:29,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691946275] [2021-05-06 08:20:29,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:29,193 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:29,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1368362853] [2021-05-06 08:20:29,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-06 08:20:29,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:29,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 08:20:29,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:29,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:29,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:29,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:29,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:29,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:29,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:29,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:29,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:29,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:29,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:29,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:29,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:29,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:29,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:29,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:29,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:29,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:29,387 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:20:29,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:29,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691946275] [2021-05-06 08:20:29,388 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:29,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368362853] [2021-05-06 08:20:29,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368362853] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:29,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:29,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:20:29,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944136735] [2021-05-06 08:20:29,388 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:20:29,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:29,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:20:29,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:20:29,389 INFO L87 Difference]: Start difference. First operand 234 states and 316 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:20:29,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:29,479 INFO L93 Difference]: Finished difference Result 245 states and 326 transitions. [2021-05-06 08:20:29,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:20:29,481 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2021-05-06 08:20:29,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:29,483 INFO L225 Difference]: With dead ends: 245 [2021-05-06 08:20:29,483 INFO L226 Difference]: Without dead ends: 245 [2021-05-06 08:20:29,484 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 34.0ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:20:29,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-05-06 08:20:29,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 241. [2021-05-06 08:20:29,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 165 states have (on average 1.2787878787878788) internal successors, (211), 171 states have internal predecessors, (211), 57 states have call successors, (57), 19 states have call predecessors, (57), 18 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2021-05-06 08:20:29,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 323 transitions. [2021-05-06 08:20:29,499 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 323 transitions. Word has length 42 [2021-05-06 08:20:29,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:29,500 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 323 transitions. [2021-05-06 08:20:29,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:20:29,500 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 323 transitions. [2021-05-06 08:20:29,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 08:20:29,500 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:29,500 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:29,713 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 08:20:29,713 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:29,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:29,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1867030118, now seen corresponding path program 2 times [2021-05-06 08:20:29,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:29,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368904304] [2021-05-06 08:20:29,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:29,722 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:29,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [100156835] [2021-05-06 08:20:29,722 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 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 [2021-05-06 08:20:29,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:20:29,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:20:29,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:20:29,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:29,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:29,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:29,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:29,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:29,874 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-05-06 08:20:29,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:29,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368904304] [2021-05-06 08:20:29,874 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:29,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100156835] [2021-05-06 08:20:29,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100156835] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:20:29,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:20:29,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:20:29,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053741365] [2021-05-06 08:20:29,877 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:20:29,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:29,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:20:29,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:20:29,878 INFO L87 Difference]: Start difference. First operand 241 states and 323 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 08:20:29,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:29,951 INFO L93 Difference]: Finished difference Result 379 states and 553 transitions. [2021-05-06 08:20:29,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:20:29,952 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2021-05-06 08:20:29,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:29,954 INFO L225 Difference]: With dead ends: 379 [2021-05-06 08:20:29,954 INFO L226 Difference]: Without dead ends: 379 [2021-05-06 08:20:29,954 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 19.8ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:20:29,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-05-06 08:20:29,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 265. [2021-05-06 08:20:29,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 189 states have (on average 1.2962962962962963) internal successors, (245), 195 states have internal predecessors, (245), 57 states have call successors, (57), 19 states have call predecessors, (57), 18 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2021-05-06 08:20:29,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 357 transitions. [2021-05-06 08:20:29,966 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 357 transitions. Word has length 43 [2021-05-06 08:20:29,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:29,966 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 357 transitions. [2021-05-06 08:20:29,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 08:20:29,967 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 357 transitions. [2021-05-06 08:20:29,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-06 08:20:29,967 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:29,967 INFO L523 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2021-05-06 08:20:30,185 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 08:20:30,185 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:30,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:30,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1204922772, now seen corresponding path program 1 times [2021-05-06 08:20:30,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:30,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125313753] [2021-05-06 08:20:30,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:30,200 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:30,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1547801492] [2021-05-06 08:20:30,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:30,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:30,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 08:20:30,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:30,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:30,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:30,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:30,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:30,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:30,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:30,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:30,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:30,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:30,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:30,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:30,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:30,422 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-06 08:20:30,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:30,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125313753] [2021-05-06 08:20:30,423 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:30,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547801492] [2021-05-06 08:20:30,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547801492] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:30,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:30,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:20:30,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683214454] [2021-05-06 08:20:30,423 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:20:30,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:30,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:20:30,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:20:30,424 INFO L87 Difference]: Start difference. First operand 265 states and 357 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 08:20:30,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:30,684 INFO L93 Difference]: Finished difference Result 339 states and 477 transitions. [2021-05-06 08:20:30,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:20:30,684 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 46 [2021-05-06 08:20:30,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:30,686 INFO L225 Difference]: With dead ends: 339 [2021-05-06 08:20:30,686 INFO L226 Difference]: Without dead ends: 339 [2021-05-06 08:20:30,687 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 156.0ms TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:20:30,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-05-06 08:20:30,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 296. [2021-05-06 08:20:30,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 203 states have (on average 1.3103448275862069) internal successors, (266), 211 states have internal predecessors, (266), 73 states have call successors, (73), 20 states have call predecessors, (73), 19 states have return successors, (71), 64 states have call predecessors, (71), 71 states have call successors, (71) [2021-05-06 08:20:30,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 410 transitions. [2021-05-06 08:20:30,697 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 410 transitions. Word has length 46 [2021-05-06 08:20:30,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:30,697 INFO L480 AbstractCegarLoop]: Abstraction has 296 states and 410 transitions. [2021-05-06 08:20:30,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 08:20:30,698 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 410 transitions. [2021-05-06 08:20:30,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-06 08:20:30,698 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:30,698 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:30,909 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 08:20:30,909 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:30,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:30,909 INFO L82 PathProgramCache]: Analyzing trace with hash -2059301326, now seen corresponding path program 1 times [2021-05-06 08:20:30,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:30,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221851851] [2021-05-06 08:20:30,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:30,915 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:30,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1846607370] [2021-05-06 08:20:30,916 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 [2021-05-06 08:20:30,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:30,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-06 08:20:30,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:31,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:31,252 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-05-06 08:20:31,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:31,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221851851] [2021-05-06 08:20:31,253 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:31,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846607370] [2021-05-06 08:20:31,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846607370] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:31,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:31,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:20:31,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921827075] [2021-05-06 08:20:31,255 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:20:31,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:31,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:20:31,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:20:31,255 INFO L87 Difference]: Start difference. First operand 296 states and 410 transitions. Second operand has 12 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:20:31,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:31,695 INFO L93 Difference]: Finished difference Result 341 states and 478 transitions. [2021-05-06 08:20:31,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:20:31,696 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 58 [2021-05-06 08:20:31,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:31,698 INFO L225 Difference]: With dead ends: 341 [2021-05-06 08:20:31,698 INFO L226 Difference]: Without dead ends: 340 [2021-05-06 08:20:31,698 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 230.5ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:20:31,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-05-06 08:20:31,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 336. [2021-05-06 08:20:31,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 225 states have (on average 1.3155555555555556) internal successors, (296), 235 states have internal predecessors, (296), 89 states have call successors, (89), 22 states have call predecessors, (89), 21 states have return successors, (87), 78 states have call predecessors, (87), 87 states have call successors, (87) [2021-05-06 08:20:31,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 472 transitions. [2021-05-06 08:20:31,709 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 472 transitions. Word has length 58 [2021-05-06 08:20:31,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:31,710 INFO L480 AbstractCegarLoop]: Abstraction has 336 states and 472 transitions. [2021-05-06 08:20:31,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:20:31,710 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 472 transitions. [2021-05-06 08:20:31,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-06 08:20:31,711 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:31,711 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:31,925 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:31,925 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:31,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:31,925 INFO L82 PathProgramCache]: Analyzing trace with hash -80402644, now seen corresponding path program 1 times [2021-05-06 08:20:31,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:31,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195841350] [2021-05-06 08:20:31,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:31,931 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:31,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1682730096] [2021-05-06 08:20:31,931 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 [2021-05-06 08:20:31,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:31,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 08:20:31,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:32,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:32,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:32,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:32,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:32,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:32,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:32,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:32,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:32,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:32,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:32,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:32,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:32,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:32,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:32,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:32,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:32,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:32,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:32,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:32,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:32,135 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 08:20:32,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:32,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195841350] [2021-05-06 08:20:32,136 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:32,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682730096] [2021-05-06 08:20:32,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682730096] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:32,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:32,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:20:32,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339684405] [2021-05-06 08:20:32,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:20:32,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:32,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:20:32,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:20:32,137 INFO L87 Difference]: Start difference. First operand 336 states and 472 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:20:32,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:32,242 INFO L93 Difference]: Finished difference Result 399 states and 532 transitions. [2021-05-06 08:20:32,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:20:32,243 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 63 [2021-05-06 08:20:32,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:32,244 INFO L225 Difference]: With dead ends: 399 [2021-05-06 08:20:32,244 INFO L226 Difference]: Without dead ends: 399 [2021-05-06 08:20:32,244 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 45.4ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:20:32,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-05-06 08:20:32,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 385. [2021-05-06 08:20:32,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 261 states have (on average 1.2835249042145593) internal successors, (335), 269 states have internal predecessors, (335), 93 states have call successors, (93), 31 states have call predecessors, (93), 30 states have return successors, (91), 84 states have call predecessors, (91), 91 states have call successors, (91) [2021-05-06 08:20:32,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 519 transitions. [2021-05-06 08:20:32,256 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 519 transitions. Word has length 63 [2021-05-06 08:20:32,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:32,257 INFO L480 AbstractCegarLoop]: Abstraction has 385 states and 519 transitions. [2021-05-06 08:20:32,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:20:32,257 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 519 transitions. [2021-05-06 08:20:32,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-06 08:20:32,257 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:32,258 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:32,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:32,473 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:32,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:32,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1248898955, now seen corresponding path program 1 times [2021-05-06 08:20:32,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:32,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833628073] [2021-05-06 08:20:32,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:32,481 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:32,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [464038633] [2021-05-06 08:20:32,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-06 08:20:32,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:32,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 08:20:32,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:32,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:32,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:32,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:32,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:32,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:32,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:32,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:32,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:32,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:32,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:32,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:32,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:32,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:32,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:32,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:32,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:32,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:32,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:32,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:32,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:32,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:32,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:32,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:32,705 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 08:20:32,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:32,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833628073] [2021-05-06 08:20:32,705 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:32,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464038633] [2021-05-06 08:20:32,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464038633] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:32,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:32,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:20:32,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456820442] [2021-05-06 08:20:32,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:20:32,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:32,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:20:32,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:20:32,707 INFO L87 Difference]: Start difference. First operand 385 states and 519 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:20:32,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:32,868 INFO L93 Difference]: Finished difference Result 484 states and 635 transitions. [2021-05-06 08:20:32,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:20:32,868 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 64 [2021-05-06 08:20:32,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:32,871 INFO L225 Difference]: With dead ends: 484 [2021-05-06 08:20:32,871 INFO L226 Difference]: Without dead ends: 484 [2021-05-06 08:20:32,871 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 64.1ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:20:32,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-05-06 08:20:32,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 462. [2021-05-06 08:20:32,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 312 states have (on average 1.266025641025641) internal successors, (395), 325 states have internal predecessors, (395), 110 states have call successors, (110), 40 states have call predecessors, (110), 39 states have return successors, (107), 96 states have call predecessors, (107), 107 states have call successors, (107) [2021-05-06 08:20:32,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 612 transitions. [2021-05-06 08:20:32,884 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 612 transitions. Word has length 64 [2021-05-06 08:20:32,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:32,884 INFO L480 AbstractCegarLoop]: Abstraction has 462 states and 612 transitions. [2021-05-06 08:20:32,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:20:32,885 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 612 transitions. [2021-05-06 08:20:32,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-06 08:20:32,885 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:32,886 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 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] [2021-05-06 08:20:33,100 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-06 08:20:33,101 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:33,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:33,101 INFO L82 PathProgramCache]: Analyzing trace with hash -934249537, now seen corresponding path program 1 times [2021-05-06 08:20:33,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:33,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136620533] [2021-05-06 08:20:33,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:33,110 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:33,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1890853590] [2021-05-06 08:20:33,110 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 [2021-05-06 08:20:33,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:33,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 08:20:33,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:33,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,339 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-05-06 08:20:33,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:33,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136620533] [2021-05-06 08:20:33,339 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:33,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890853590] [2021-05-06 08:20:33,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890853590] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:33,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:33,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:20:33,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216896515] [2021-05-06 08:20:33,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:20:33,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:33,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:20:33,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:20:33,340 INFO L87 Difference]: Start difference. First operand 462 states and 612 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-06 08:20:33,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:33,516 INFO L93 Difference]: Finished difference Result 504 states and 662 transitions. [2021-05-06 08:20:33,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:20:33,517 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 67 [2021-05-06 08:20:33,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:33,519 INFO L225 Difference]: With dead ends: 504 [2021-05-06 08:20:33,519 INFO L226 Difference]: Without dead ends: 504 [2021-05-06 08:20:33,519 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 79.0ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:20:33,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-05-06 08:20:33,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 480. [2021-05-06 08:20:33,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 324 states have (on average 1.2592592592592593) internal successors, (408), 337 states have internal predecessors, (408), 113 states have call successors, (113), 43 states have call predecessors, (113), 42 states have return successors, (110), 99 states have call predecessors, (110), 110 states have call successors, (110) [2021-05-06 08:20:33,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 631 transitions. [2021-05-06 08:20:33,532 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 631 transitions. Word has length 67 [2021-05-06 08:20:33,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:33,533 INFO L480 AbstractCegarLoop]: Abstraction has 480 states and 631 transitions. [2021-05-06 08:20:33,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-06 08:20:33,533 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 631 transitions. [2021-05-06 08:20:33,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-06 08:20:33,533 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:33,534 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:33,748 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-06 08:20:33,749 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:33,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:33,749 INFO L82 PathProgramCache]: Analyzing trace with hash -28038179, now seen corresponding path program 2 times [2021-05-06 08:20:33,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:33,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113074378] [2021-05-06 08:20:33,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:33,756 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:33,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [73539963] [2021-05-06 08:20:33,756 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 [2021-05-06 08:20:33,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:20:33,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:20:33,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-06 08:20:33,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:33,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,957 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 08:20:33,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:33,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113074378] [2021-05-06 08:20:33,958 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:33,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73539963] [2021-05-06 08:20:33,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73539963] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:33,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:33,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:20:33,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589660955] [2021-05-06 08:20:33,958 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:20:33,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:33,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:20:33,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:20:33,959 INFO L87 Difference]: Start difference. First operand 480 states and 631 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:20:34,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:34,320 INFO L93 Difference]: Finished difference Result 816 states and 1192 transitions. [2021-05-06 08:20:34,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 08:20:34,321 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2021-05-06 08:20:34,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:34,325 INFO L225 Difference]: With dead ends: 816 [2021-05-06 08:20:34,325 INFO L226 Difference]: Without dead ends: 816 [2021-05-06 08:20:34,326 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 160.6ms TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-05-06 08:20:34,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2021-05-06 08:20:34,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 542. [2021-05-06 08:20:34,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 370 states have (on average 1.2837837837837838) internal successors, (475), 383 states have internal predecessors, (475), 129 states have call successors, (129), 43 states have call predecessors, (129), 42 states have return successors, (126), 115 states have call predecessors, (126), 126 states have call successors, (126) [2021-05-06 08:20:34,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 730 transitions. [2021-05-06 08:20:34,347 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 730 transitions. Word has length 65 [2021-05-06 08:20:34,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:34,348 INFO L480 AbstractCegarLoop]: Abstraction has 542 states and 730 transitions. [2021-05-06 08:20:34,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:20:34,348 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 730 transitions. [2021-05-06 08:20:34,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-06 08:20:34,349 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:34,349 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:34,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:34,573 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:34,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:34,573 INFO L82 PathProgramCache]: Analyzing trace with hash 695478703, now seen corresponding path program 1 times [2021-05-06 08:20:34,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:34,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963530270] [2021-05-06 08:20:34,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:34,579 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:34,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1897547372] [2021-05-06 08:20:34,580 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 [2021-05-06 08:20:34,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:34,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 08:20:34,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:34,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:34,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:34,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:34,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:34,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:34,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:34,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:34,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:34,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:34,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:34,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:34,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:34,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:34,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:34,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:34,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:34,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:34,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:34,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:34,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:34,793 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 08:20:34,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:34,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963530270] [2021-05-06 08:20:34,793 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:34,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897547372] [2021-05-06 08:20:34,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897547372] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:34,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:34,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:20:34,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498685655] [2021-05-06 08:20:34,794 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:20:34,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:34,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:20:34,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:20:34,795 INFO L87 Difference]: Start difference. First operand 542 states and 730 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:20:34,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:34,907 INFO L93 Difference]: Finished difference Result 544 states and 727 transitions. [2021-05-06 08:20:34,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:20:34,908 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), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-05-06 08:20:34,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:34,910 INFO L225 Difference]: With dead ends: 544 [2021-05-06 08:20:34,910 INFO L226 Difference]: Without dead ends: 544 [2021-05-06 08:20:34,911 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 48.0ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:20:34,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-05-06 08:20:34,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 542. [2021-05-06 08:20:34,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 370 states have (on average 1.272972972972973) internal successors, (471), 383 states have internal predecessors, (471), 129 states have call successors, (129), 43 states have call predecessors, (129), 42 states have return successors, (126), 115 states have call predecessors, (126), 126 states have call successors, (126) [2021-05-06 08:20:34,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 726 transitions. [2021-05-06 08:20:34,926 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 726 transitions. Word has length 65 [2021-05-06 08:20:34,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:34,926 INFO L480 AbstractCegarLoop]: Abstraction has 542 states and 726 transitions. [2021-05-06 08:20:34,926 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), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:20:34,926 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 726 transitions. [2021-05-06 08:20:34,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-06 08:20:34,927 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:34,927 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:35,140 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-06 08:20:35,141 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:35,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:35,141 INFO L82 PathProgramCache]: Analyzing trace with hash -609169376, now seen corresponding path program 1 times [2021-05-06 08:20:35,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:35,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948310394] [2021-05-06 08:20:35,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:35,148 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:35,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1571714689] [2021-05-06 08:20:35,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-06 08:20:35,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:35,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-06 08:20:35,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:35,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,336 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-05-06 08:20:35,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:35,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948310394] [2021-05-06 08:20:35,337 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:35,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571714689] [2021-05-06 08:20:35,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571714689] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:20:35,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:20:35,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:20:35,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719820961] [2021-05-06 08:20:35,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:20:35,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:35,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:20:35,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:20:35,338 INFO L87 Difference]: Start difference. First operand 542 states and 726 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:20:35,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:35,379 INFO L93 Difference]: Finished difference Result 588 states and 787 transitions. [2021-05-06 08:20:35,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:20:35,380 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 69 [2021-05-06 08:20:35,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:35,382 INFO L225 Difference]: With dead ends: 588 [2021-05-06 08:20:35,382 INFO L226 Difference]: Without dead ends: 588 [2021-05-06 08:20:35,382 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.7ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:20:35,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-05-06 08:20:35,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 532. [2021-05-06 08:20:35,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 376 states have (on average 1.2845744680851063) internal successors, (483), 382 states have internal predecessors, (483), 117 states have call successors, (117), 39 states have call predecessors, (117), 38 states have return successors, (114), 110 states have call predecessors, (114), 114 states have call successors, (114) [2021-05-06 08:20:35,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 714 transitions. [2021-05-06 08:20:35,398 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 714 transitions. Word has length 69 [2021-05-06 08:20:35,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:35,398 INFO L480 AbstractCegarLoop]: Abstraction has 532 states and 714 transitions. [2021-05-06 08:20:35,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:20:35,398 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 714 transitions. [2021-05-06 08:20:35,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-06 08:20:35,399 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:35,399 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:35,612 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:35,613 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:35,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:35,613 INFO L82 PathProgramCache]: Analyzing trace with hash -893000644, now seen corresponding path program 2 times [2021-05-06 08:20:35,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:35,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759590179] [2021-05-06 08:20:35,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:35,626 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:35,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1298521861] [2021-05-06 08:20:35,626 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 [2021-05-06 08:20:35,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:20:35,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:20:35,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 08:20:35,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:35,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,878 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 08:20:35,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:35,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759590179] [2021-05-06 08:20:35,878 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:35,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298521861] [2021-05-06 08:20:35,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298521861] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:35,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:35,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:20:35,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234803339] [2021-05-06 08:20:35,881 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:20:35,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:35,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:20:35,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:20:35,882 INFO L87 Difference]: Start difference. First operand 532 states and 714 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:20:36,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:36,030 INFO L93 Difference]: Finished difference Result 555 states and 735 transitions. [2021-05-06 08:20:36,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:20:36,030 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 69 [2021-05-06 08:20:36,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:36,032 INFO L225 Difference]: With dead ends: 555 [2021-05-06 08:20:36,032 INFO L226 Difference]: Without dead ends: 555 [2021-05-06 08:20:36,033 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 67.4ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:20:36,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-05-06 08:20:36,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 544. [2021-05-06 08:20:36,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 386 states have (on average 1.2772020725388602) internal successors, (493), 389 states have internal predecessors, (493), 118 states have call successors, (118), 40 states have call predecessors, (118), 39 states have return successors, (115), 114 states have call predecessors, (115), 115 states have call successors, (115) [2021-05-06 08:20:36,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 726 transitions. [2021-05-06 08:20:36,046 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 726 transitions. Word has length 69 [2021-05-06 08:20:36,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:36,046 INFO L480 AbstractCegarLoop]: Abstraction has 544 states and 726 transitions. [2021-05-06 08:20:36,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:20:36,047 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 726 transitions. [2021-05-06 08:20:36,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-06 08:20:36,047 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:36,047 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:36,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-06 08:20:36,261 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:36,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:36,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1125561725, now seen corresponding path program 2 times [2021-05-06 08:20:36,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:36,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464025301] [2021-05-06 08:20:36,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:36,271 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:36,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [849018029] [2021-05-06 08:20:36,271 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 [2021-05-06 08:20:36,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:20:36,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:20:36,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:20:36,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:36,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:36,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:36,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:36,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:36,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:36,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:36,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:36,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:36,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:36,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:36,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:36,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:36,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:36,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:36,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:36,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:36,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:36,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:36,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:36,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:36,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:36,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:36,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:36,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:36,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:36,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:36,503 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 08:20:36,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:36,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464025301] [2021-05-06 08:20:36,503 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:36,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849018029] [2021-05-06 08:20:36,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849018029] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:36,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:36,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:20:36,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344593146] [2021-05-06 08:20:36,504 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:20:36,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:36,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:20:36,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:20:36,504 INFO L87 Difference]: Start difference. First operand 544 states and 726 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:20:36,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:36,682 INFO L93 Difference]: Finished difference Result 664 states and 855 transitions. [2021-05-06 08:20:36,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 08:20:36,682 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 70 [2021-05-06 08:20:36,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:36,685 INFO L225 Difference]: With dead ends: 664 [2021-05-06 08:20:36,685 INFO L226 Difference]: Without dead ends: 664 [2021-05-06 08:20:36,685 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 78.6ms TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:20:36,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-05-06 08:20:36,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 631. [2021-05-06 08:20:36,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 444 states have (on average 1.2545045045045045) internal successors, (557), 448 states have internal predecessors, (557), 135 states have call successors, (135), 52 states have call predecessors, (135), 51 states have return successors, (131), 130 states have call predecessors, (131), 131 states have call successors, (131) [2021-05-06 08:20:36,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 823 transitions. [2021-05-06 08:20:36,702 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 823 transitions. Word has length 70 [2021-05-06 08:20:36,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:36,702 INFO L480 AbstractCegarLoop]: Abstraction has 631 states and 823 transitions. [2021-05-06 08:20:36,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:20:36,702 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 823 transitions. [2021-05-06 08:20:36,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-06 08:20:36,704 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:36,704 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:36,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-06 08:20:36,917 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:36,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:36,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1343179262, now seen corresponding path program 1 times [2021-05-06 08:20:36,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:36,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392273227] [2021-05-06 08:20:36,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:36,923 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:36,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [945358903] [2021-05-06 08:20:36,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-06 08:20:37,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:37,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 08:20:37,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:37,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:37,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:37,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:37,163 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-05-06 08:20:37,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:37,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392273227] [2021-05-06 08:20:37,164 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:37,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945358903] [2021-05-06 08:20:37,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945358903] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:37,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:37,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:20:37,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878576117] [2021-05-06 08:20:37,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:20:37,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:37,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:20:37,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:20:37,165 INFO L87 Difference]: Start difference. First operand 631 states and 823 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:20:37,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:37,256 INFO L93 Difference]: Finished difference Result 722 states and 953 transitions. [2021-05-06 08:20:37,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:20:37,257 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 70 [2021-05-06 08:20:37,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:37,260 INFO L225 Difference]: With dead ends: 722 [2021-05-06 08:20:37,260 INFO L226 Difference]: Without dead ends: 722 [2021-05-06 08:20:37,260 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 49.2ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:20:37,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2021-05-06 08:20:37,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 715. [2021-05-06 08:20:37,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 519 states have (on average 1.2793834296724471) internal successors, (664), 528 states have internal predecessors, (664), 143 states have call successors, (143), 53 states have call predecessors, (143), 52 states have return successors, (139), 133 states have call predecessors, (139), 139 states have call successors, (139) [2021-05-06 08:20:37,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 946 transitions. [2021-05-06 08:20:37,278 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 946 transitions. Word has length 70 [2021-05-06 08:20:37,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:37,278 INFO L480 AbstractCegarLoop]: Abstraction has 715 states and 946 transitions. [2021-05-06 08:20:37,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:20:37,278 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 946 transitions. [2021-05-06 08:20:37,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-06 08:20:37,279 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:37,279 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 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] [2021-05-06 08:20:37,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-06 08:20:37,496 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:37,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:37,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1695740300, now seen corresponding path program 1 times [2021-05-06 08:20:37,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:37,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898814120] [2021-05-06 08:20:37,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:37,502 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:37,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1244956378] [2021-05-06 08:20:37,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:37,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:37,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 08:20:37,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:37,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:37,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:37,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:37,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:37,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:37,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:37,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:37,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:37,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:37,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:37,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:37,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:37,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:37,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:37,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:37,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:37,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:37,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:37,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:37,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:37,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:37,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:37,756 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-05-06 08:20:37,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:37,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898814120] [2021-05-06 08:20:37,757 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:37,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244956378] [2021-05-06 08:20:37,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244956378] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:37,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:37,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:20:37,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953855886] [2021-05-06 08:20:37,758 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:20:37,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:37,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:20:37,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:20:37,758 INFO L87 Difference]: Start difference. First operand 715 states and 946 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 08:20:38,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:38,229 INFO L93 Difference]: Finished difference Result 942 states and 1295 transitions. [2021-05-06 08:20:38,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-06 08:20:38,230 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 74 [2021-05-06 08:20:38,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:38,234 INFO L225 Difference]: With dead ends: 942 [2021-05-06 08:20:38,234 INFO L226 Difference]: Without dead ends: 942 [2021-05-06 08:20:38,234 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 258.3ms TimeCoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2021-05-06 08:20:38,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2021-05-06 08:20:38,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 745. [2021-05-06 08:20:38,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 534 states have (on average 1.2771535580524345) internal successors, (682), 546 states have internal predecessors, (682), 155 states have call successors, (155), 56 states have call predecessors, (155), 55 states have return successors, (151), 142 states have call predecessors, (151), 151 states have call successors, (151) [2021-05-06 08:20:38,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 988 transitions. [2021-05-06 08:20:38,257 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 988 transitions. Word has length 74 [2021-05-06 08:20:38,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:38,258 INFO L480 AbstractCegarLoop]: Abstraction has 745 states and 988 transitions. [2021-05-06 08:20:38,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 08:20:38,258 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 988 transitions. [2021-05-06 08:20:38,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-06 08:20:38,259 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:38,259 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 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, 1] [2021-05-06 08:20:38,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-06 08:20:38,477 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:38,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:38,477 INFO L82 PathProgramCache]: Analyzing trace with hash 589974765, now seen corresponding path program 2 times [2021-05-06 08:20:38,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:38,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132754663] [2021-05-06 08:20:38,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:38,483 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:38,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1442826788] [2021-05-06 08:20:38,483 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:38,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:20:38,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:20:38,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 08:20:38,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:38,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:38,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:38,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:38,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:38,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:38,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:38,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:38,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:38,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:38,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:38,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:38,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:38,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:38,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:38,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:38,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:38,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:38,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:38,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:38,695 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-05-06 08:20:38,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:38,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132754663] [2021-05-06 08:20:38,695 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:38,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442826788] [2021-05-06 08:20:38,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442826788] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:38,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:38,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:20:38,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640389926] [2021-05-06 08:20:38,696 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:20:38,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:38,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:20:38,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:20:38,697 INFO L87 Difference]: Start difference. First operand 745 states and 988 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:20:38,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:38,863 INFO L93 Difference]: Finished difference Result 913 states and 1248 transitions. [2021-05-06 08:20:38,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:20:38,864 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 73 [2021-05-06 08:20:38,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:38,867 INFO L225 Difference]: With dead ends: 913 [2021-05-06 08:20:38,867 INFO L226 Difference]: Without dead ends: 913 [2021-05-06 08:20:38,868 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 66.1ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:20:38,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2021-05-06 08:20:38,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 838. [2021-05-06 08:20:38,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 600 states have (on average 1.3033333333333332) internal successors, (782), 613 states have internal predecessors, (782), 180 states have call successors, (180), 58 states have call predecessors, (180), 57 states have return successors, (176), 166 states have call predecessors, (176), 176 states have call successors, (176) [2021-05-06 08:20:38,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 1138 transitions. [2021-05-06 08:20:38,888 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 1138 transitions. Word has length 73 [2021-05-06 08:20:38,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:38,889 INFO L480 AbstractCegarLoop]: Abstraction has 838 states and 1138 transitions. [2021-05-06 08:20:38,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:20:38,889 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 1138 transitions. [2021-05-06 08:20:38,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-06 08:20:38,890 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:38,890 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 3, 3, 3, 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] [2021-05-06 08:20:39,114 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:39,114 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:39,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:39,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1662269742, now seen corresponding path program 3 times [2021-05-06 08:20:39,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:39,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292125253] [2021-05-06 08:20:39,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:39,124 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:39,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2092967736] [2021-05-06 08:20:39,124 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:39,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:20:39,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:20:39,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 59 conjunts are in the unsatisfiable core [2021-05-06 08:20:39,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:39,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:39,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:39,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:39,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:39,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:39,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:39,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:39,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:39,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:39,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:39,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:39,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:39,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:39,562 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-05-06 08:20:39,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:39,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292125253] [2021-05-06 08:20:39,563 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:39,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092967736] [2021-05-06 08:20:39,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092967736] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:39,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:39,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:20:39,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313536192] [2021-05-06 08:20:39,564 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:20:39,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:39,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:20:39,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:20:39,564 INFO L87 Difference]: Start difference. First operand 838 states and 1138 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 08:20:39,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:39,981 INFO L93 Difference]: Finished difference Result 920 states and 1253 transitions. [2021-05-06 08:20:39,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:20:39,982 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 75 [2021-05-06 08:20:39,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:39,986 INFO L225 Difference]: With dead ends: 920 [2021-05-06 08:20:39,986 INFO L226 Difference]: Without dead ends: 920 [2021-05-06 08:20:39,986 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 309.6ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:20:39,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-05-06 08:20:40,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 895. [2021-05-06 08:20:40,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 636 states have (on average 1.309748427672956) internal successors, (833), 650 states have internal predecessors, (833), 198 states have call successors, (198), 61 states have call predecessors, (198), 60 states have return successors, (194), 183 states have call predecessors, (194), 194 states have call successors, (194) [2021-05-06 08:20:40,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 1225 transitions. [2021-05-06 08:20:40,020 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 1225 transitions. Word has length 75 [2021-05-06 08:20:40,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:40,020 INFO L480 AbstractCegarLoop]: Abstraction has 895 states and 1225 transitions. [2021-05-06 08:20:40,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 08:20:40,021 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 1225 transitions. [2021-05-06 08:20:40,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-06 08:20:40,022 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:40,022 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:40,247 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:40,247 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:40,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:40,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1753783729, now seen corresponding path program 3 times [2021-05-06 08:20:40,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:40,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640930037] [2021-05-06 08:20:40,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:40,254 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:40,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1884069525] [2021-05-06 08:20:40,254 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:40,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:20:40,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:20:40,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 08:20:40,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:40,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:40,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:40,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:40,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:40,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:40,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:40,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:40,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:40,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:40,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:40,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:40,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:40,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:40,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:40,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:40,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:40,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:40,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:40,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:40,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:40,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:40,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:40,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:40,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:40,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:40,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:40,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:40,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:40,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:40,488 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 08:20:40,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:40,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640930037] [2021-05-06 08:20:40,489 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:40,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884069525] [2021-05-06 08:20:40,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884069525] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:40,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:40,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:20:40,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652427614] [2021-05-06 08:20:40,489 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:20:40,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:40,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:20:40,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:20:40,490 INFO L87 Difference]: Start difference. First operand 895 states and 1225 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:20:40,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:40,717 INFO L93 Difference]: Finished difference Result 1075 states and 1426 transitions. [2021-05-06 08:20:40,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 08:20:40,717 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 76 [2021-05-06 08:20:40,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:40,721 INFO L225 Difference]: With dead ends: 1075 [2021-05-06 08:20:40,721 INFO L226 Difference]: Without dead ends: 1075 [2021-05-06 08:20:40,722 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 88.9ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:20:40,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2021-05-06 08:20:40,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 1045. [2021-05-06 08:20:40,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 740 states have (on average 1.2797297297297296) internal successors, (947), 755 states have internal predecessors, (947), 229 states have call successors, (229), 76 states have call predecessors, (229), 75 states have return successors, (224), 213 states have call predecessors, (224), 224 states have call successors, (224) [2021-05-06 08:20:40,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 1400 transitions. [2021-05-06 08:20:40,745 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 1400 transitions. Word has length 76 [2021-05-06 08:20:40,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:40,746 INFO L480 AbstractCegarLoop]: Abstraction has 1045 states and 1400 transitions. [2021-05-06 08:20:40,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:20:40,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 1400 transitions. [2021-05-06 08:20:40,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-05-06 08:20:40,747 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:40,747 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:40,970 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:40,971 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:40,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:40,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1747863324, now seen corresponding path program 1 times [2021-05-06 08:20:40,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:40,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812300071] [2021-05-06 08:20:40,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:40,977 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:40,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [346296338] [2021-05-06 08:20:40,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:41,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:41,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 56 conjunts are in the unsatisfiable core [2021-05-06 08:20:41,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:41,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:41,329 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-05-06 08:20:41,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:41,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812300071] [2021-05-06 08:20:41,330 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:41,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346296338] [2021-05-06 08:20:41,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346296338] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:41,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:41,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:20:41,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377764159] [2021-05-06 08:20:41,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:20:41,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:41,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:20:41,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:20:41,331 INFO L87 Difference]: Start difference. First operand 1045 states and 1400 transitions. Second operand has 13 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 08:20:41,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:41,793 INFO L93 Difference]: Finished difference Result 1119 states and 1497 transitions. [2021-05-06 08:20:41,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:20:41,794 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 81 [2021-05-06 08:20:41,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:41,798 INFO L225 Difference]: With dead ends: 1119 [2021-05-06 08:20:41,798 INFO L226 Difference]: Without dead ends: 1118 [2021-05-06 08:20:41,798 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 232.4ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:20:41,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2021-05-06 08:20:41,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 1053. [2021-05-06 08:20:41,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1053 states, 747 states have (on average 1.2757697456492638) internal successors, (953), 761 states have internal predecessors, (953), 227 states have call successors, (227), 79 states have call predecessors, (227), 78 states have return successors, (223), 212 states have call predecessors, (223), 223 states have call successors, (223) [2021-05-06 08:20:41,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1053 states to 1053 states and 1403 transitions. [2021-05-06 08:20:41,821 INFO L78 Accepts]: Start accepts. Automaton has 1053 states and 1403 transitions. Word has length 81 [2021-05-06 08:20:41,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:41,821 INFO L480 AbstractCegarLoop]: Abstraction has 1053 states and 1403 transitions. [2021-05-06 08:20:41,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 08:20:41,822 INFO L276 IsEmpty]: Start isEmpty. Operand 1053 states and 1403 transitions. [2021-05-06 08:20:41,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-06 08:20:41,823 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:41,823 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 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] [2021-05-06 08:20:42,041 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-05-06 08:20:42,041 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:42,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:42,041 INFO L82 PathProgramCache]: Analyzing trace with hash 572886209, now seen corresponding path program 1 times [2021-05-06 08:20:42,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:42,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927826478] [2021-05-06 08:20:42,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:42,047 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:42,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1564347401] [2021-05-06 08:20:42,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:42,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:42,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:20:42,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:42,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,326 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 16 proven. 88 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 08:20:42,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:42,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927826478] [2021-05-06 08:20:42,326 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:42,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564347401] [2021-05-06 08:20:42,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564347401] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:42,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:42,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:20:42,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075075634] [2021-05-06 08:20:42,327 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:20:42,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:42,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:20:42,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:20:42,327 INFO L87 Difference]: Start difference. First operand 1053 states and 1403 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:20:42,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:42,516 INFO L93 Difference]: Finished difference Result 1059 states and 1404 transitions. [2021-05-06 08:20:42,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 08:20:42,517 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 87 [2021-05-06 08:20:42,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:42,520 INFO L225 Difference]: With dead ends: 1059 [2021-05-06 08:20:42,520 INFO L226 Difference]: Without dead ends: 1059 [2021-05-06 08:20:42,521 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 76.4ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:20:42,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2021-05-06 08:20:42,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 1053. [2021-05-06 08:20:42,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1053 states, 747 states have (on average 1.2730923694779117) internal successors, (951), 761 states have internal predecessors, (951), 227 states have call successors, (227), 79 states have call predecessors, (227), 78 states have return successors, (223), 212 states have call predecessors, (223), 223 states have call successors, (223) [2021-05-06 08:20:42,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1053 states to 1053 states and 1401 transitions. [2021-05-06 08:20:42,542 INFO L78 Accepts]: Start accepts. Automaton has 1053 states and 1401 transitions. Word has length 87 [2021-05-06 08:20:42,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:42,543 INFO L480 AbstractCegarLoop]: Abstraction has 1053 states and 1401 transitions. [2021-05-06 08:20:42,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:20:42,543 INFO L276 IsEmpty]: Start isEmpty. Operand 1053 states and 1401 transitions. [2021-05-06 08:20:42,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-06 08:20:42,544 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:42,544 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:42,752 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:42,753 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:42,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:42,753 INFO L82 PathProgramCache]: Analyzing trace with hash -2091636203, now seen corresponding path program 2 times [2021-05-06 08:20:42,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:42,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785572453] [2021-05-06 08:20:42,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:42,758 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:42,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1593452236] [2021-05-06 08:20:42,758 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:42,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:20:42,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:20:42,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:20:42,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:42,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,968 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 22 proven. 19 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2021-05-06 08:20:42,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:42,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785572453] [2021-05-06 08:20:42,968 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:42,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593452236] [2021-05-06 08:20:42,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593452236] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:42,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:42,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:20:42,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353062790] [2021-05-06 08:20:42,969 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:20:42,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:42,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:20:42,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:20:42,970 INFO L87 Difference]: Start difference. First operand 1053 states and 1401 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-06 08:20:43,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:43,151 INFO L93 Difference]: Finished difference Result 1318 states and 1830 transitions. [2021-05-06 08:20:43,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:20:43,161 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 90 [2021-05-06 08:20:43,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:43,166 INFO L225 Difference]: With dead ends: 1318 [2021-05-06 08:20:43,166 INFO L226 Difference]: Without dead ends: 1318 [2021-05-06 08:20:43,166 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.9ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:20:43,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2021-05-06 08:20:43,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 1198. [2021-05-06 08:20:43,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 808 states have (on average 1.2896039603960396) internal successors, (1042), 830 states have internal predecessors, (1042), 308 states have call successors, (308), 82 states have call predecessors, (308), 81 states have return successors, (304), 285 states have call predecessors, (304), 304 states have call successors, (304) [2021-05-06 08:20:43,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 1654 transitions. [2021-05-06 08:20:43,192 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 1654 transitions. Word has length 90 [2021-05-06 08:20:43,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:43,192 INFO L480 AbstractCegarLoop]: Abstraction has 1198 states and 1654 transitions. [2021-05-06 08:20:43,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-06 08:20:43,192 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 1654 transitions. [2021-05-06 08:20:43,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-05-06 08:20:43,193 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:43,193 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 2, 2, 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] [2021-05-06 08:20:43,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-06 08:20:43,409 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:43,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:43,409 INFO L82 PathProgramCache]: Analyzing trace with hash 612727057, now seen corresponding path program 2 times [2021-05-06 08:20:43,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:43,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370654966] [2021-05-06 08:20:43,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:43,418 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:43,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [575110302] [2021-05-06 08:20:43,418 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:43,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:20:43,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:20:43,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 86 conjunts are in the unsatisfiable core [2021-05-06 08:20:43,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:43,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:43,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:43,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:43,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:43,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:43,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:43,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:43,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:43,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:43,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:43,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:43,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:43,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:43,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:43,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:43,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:44,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:44,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:44,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:44,064 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 52 proven. 35 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-05-06 08:20:44,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:44,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370654966] [2021-05-06 08:20:44,065 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:44,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575110302] [2021-05-06 08:20:44,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575110302] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:44,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:44,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-06 08:20:44,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564741263] [2021-05-06 08:20:44,065 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 08:20:44,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:44,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 08:20:44,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:20:44,066 INFO L87 Difference]: Start difference. First operand 1198 states and 1654 transitions. Second operand has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:20:44,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:44,766 INFO L93 Difference]: Finished difference Result 1344 states and 1878 transitions. [2021-05-06 08:20:44,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 08:20:44,768 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 88 [2021-05-06 08:20:44,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:44,774 INFO L225 Difference]: With dead ends: 1344 [2021-05-06 08:20:44,774 INFO L226 Difference]: Without dead ends: 1343 [2021-05-06 08:20:44,774 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 505.4ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-05-06 08:20:44,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1343 states. [2021-05-06 08:20:44,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1343 to 1301. [2021-05-06 08:20:44,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1301 states, 862 states have (on average 1.3004640371229699) internal successors, (1121), 888 states have internal predecessors, (1121), 354 states have call successors, (354), 85 states have call predecessors, (354), 84 states have return successors, (350), 327 states have call predecessors, (350), 350 states have call successors, (350) [2021-05-06 08:20:44,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1301 states to 1301 states and 1825 transitions. [2021-05-06 08:20:44,811 INFO L78 Accepts]: Start accepts. Automaton has 1301 states and 1825 transitions. Word has length 88 [2021-05-06 08:20:44,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:44,811 INFO L480 AbstractCegarLoop]: Abstraction has 1301 states and 1825 transitions. [2021-05-06 08:20:44,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:20:44,812 INFO L276 IsEmpty]: Start isEmpty. Operand 1301 states and 1825 transitions. [2021-05-06 08:20:44,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-06 08:20:44,813 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:44,813 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 2, 2, 2, 2, 2, 2, 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] [2021-05-06 08:20:45,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:45,033 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:45,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:45,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1734422414, now seen corresponding path program 2 times [2021-05-06 08:20:45,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:45,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323361725] [2021-05-06 08:20:45,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:45,039 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:45,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1759859588] [2021-05-06 08:20:45,040 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:45,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:20:45,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:20:45,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 08:20:45,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:45,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:45,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:45,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:45,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:45,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:45,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:45,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:45,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:45,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:45,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:45,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:45,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:45,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:45,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:45,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:45,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:45,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:45,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:45,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:45,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:45,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:45,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:45,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:45,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:45,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:45,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:45,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:45,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:45,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:45,332 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 16 proven. 98 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 08:20:45,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:45,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323361725] [2021-05-06 08:20:45,333 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:45,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759859588] [2021-05-06 08:20:45,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759859588] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:45,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:45,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:20:45,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796224417] [2021-05-06 08:20:45,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:20:45,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:45,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:20:45,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:20:45,336 INFO L87 Difference]: Start difference. First operand 1301 states and 1825 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:20:45,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:45,514 INFO L93 Difference]: Finished difference Result 1331 states and 1852 transitions. [2021-05-06 08:20:45,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 08:20:45,514 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 91 [2021-05-06 08:20:45,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:45,519 INFO L225 Difference]: With dead ends: 1331 [2021-05-06 08:20:45,520 INFO L226 Difference]: Without dead ends: 1331 [2021-05-06 08:20:45,520 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 92.1ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:20:45,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2021-05-06 08:20:45,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 1312. [2021-05-06 08:20:45,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1312 states, 873 states have (on average 1.2966781214203895) internal successors, (1132), 899 states have internal predecessors, (1132), 354 states have call successors, (354), 85 states have call predecessors, (354), 84 states have return successors, (350), 327 states have call predecessors, (350), 350 states have call successors, (350) [2021-05-06 08:20:45,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1312 states to 1312 states and 1836 transitions. [2021-05-06 08:20:45,547 INFO L78 Accepts]: Start accepts. Automaton has 1312 states and 1836 transitions. Word has length 91 [2021-05-06 08:20:45,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:45,548 INFO L480 AbstractCegarLoop]: Abstraction has 1312 states and 1836 transitions. [2021-05-06 08:20:45,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:20:45,548 INFO L276 IsEmpty]: Start isEmpty. Operand 1312 states and 1836 transitions. [2021-05-06 08:20:45,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-06 08:20:45,549 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:45,549 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 3, 3, 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, 1] [2021-05-06 08:20:45,764 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-06 08:20:45,765 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:45,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:45,765 INFO L82 PathProgramCache]: Analyzing trace with hash 292128969, now seen corresponding path program 1 times [2021-05-06 08:20:45,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:45,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285853657] [2021-05-06 08:20:45,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:45,772 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:45,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1824872849] [2021-05-06 08:20:45,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:45,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:45,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 08:20:45,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:45,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:45,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:45,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:45,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:45,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:45,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:45,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:45,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:45,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:45,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:45,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:45,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:45,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:45,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:45,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:45,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:45,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:45,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:45,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:45,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:45,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:45,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:46,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:46,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:46,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:46,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:46,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:46,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:46,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:46,048 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 24 proven. 96 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 08:20:46,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:46,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285853657] [2021-05-06 08:20:46,048 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:46,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824872849] [2021-05-06 08:20:46,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824872849] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:46,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:46,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:20:46,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122387669] [2021-05-06 08:20:46,049 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:20:46,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:46,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:20:46,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:20:46,050 INFO L87 Difference]: Start difference. First operand 1312 states and 1836 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:20:46,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:46,262 INFO L93 Difference]: Finished difference Result 1338 states and 1858 transitions. [2021-05-06 08:20:46,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 08:20:46,262 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 93 [2021-05-06 08:20:46,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:46,267 INFO L225 Difference]: With dead ends: 1338 [2021-05-06 08:20:46,267 INFO L226 Difference]: Without dead ends: 1338 [2021-05-06 08:20:46,267 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 92.6ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:20:46,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1338 states. [2021-05-06 08:20:46,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1338 to 1332. [2021-05-06 08:20:46,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1332 states, 893 states have (on average 1.2889137737961927) internal successors, (1151), 919 states have internal predecessors, (1151), 354 states have call successors, (354), 85 states have call predecessors, (354), 84 states have return successors, (350), 327 states have call predecessors, (350), 350 states have call successors, (350) [2021-05-06 08:20:46,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1332 states to 1332 states and 1855 transitions. [2021-05-06 08:20:46,296 INFO L78 Accepts]: Start accepts. Automaton has 1332 states and 1855 transitions. Word has length 93 [2021-05-06 08:20:46,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:46,296 INFO L480 AbstractCegarLoop]: Abstraction has 1332 states and 1855 transitions. [2021-05-06 08:20:46,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:20:46,296 INFO L276 IsEmpty]: Start isEmpty. Operand 1332 states and 1855 transitions. [2021-05-06 08:20:46,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-06 08:20:46,298 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:46,298 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 3, 3, 3, 2, 2, 2, 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] [2021-05-06 08:20:46,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-06 08:20:46,520 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:46,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:46,541 INFO L82 PathProgramCache]: Analyzing trace with hash -2096647522, now seen corresponding path program 3 times [2021-05-06 08:20:46,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:46,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298830974] [2021-05-06 08:20:46,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:46,547 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:46,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1284849510] [2021-05-06 08:20:46,548 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:46,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:20:46,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:20:46,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 08:20:46,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:46,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:46,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:46,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:46,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:46,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:46,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:46,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:46,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:46,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:46,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:46,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:46,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:46,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:46,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:46,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:46,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:46,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:46,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:46,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:46,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:46,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:46,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:46,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:46,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:46,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:46,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:46,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:46,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:46,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:46,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:46,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:46,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:46,849 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 24 proven. 108 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 08:20:46,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:46,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298830974] [2021-05-06 08:20:46,850 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:46,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284849510] [2021-05-06 08:20:46,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284849510] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:46,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:46,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:20:46,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832814229] [2021-05-06 08:20:46,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:20:46,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:46,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:20:46,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:20:46,852 INFO L87 Difference]: Start difference. First operand 1332 states and 1855 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:20:47,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:47,059 INFO L93 Difference]: Finished difference Result 1511 states and 2057 transitions. [2021-05-06 08:20:47,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 08:20:47,069 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 97 [2021-05-06 08:20:47,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:47,075 INFO L225 Difference]: With dead ends: 1511 [2021-05-06 08:20:47,075 INFO L226 Difference]: Without dead ends: 1511 [2021-05-06 08:20:47,075 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 111.6ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:20:47,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1511 states. [2021-05-06 08:20:47,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1511 to 1454. [2021-05-06 08:20:47,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1454 states, 963 states have (on average 1.2793354101765317) internal successors, (1232), 990 states have internal predecessors, (1232), 387 states have call successors, (387), 104 states have call predecessors, (387), 103 states have return successors, (382), 359 states have call predecessors, (382), 382 states have call successors, (382) [2021-05-06 08:20:47,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1454 states to 1454 states and 2001 transitions. [2021-05-06 08:20:47,104 INFO L78 Accepts]: Start accepts. Automaton has 1454 states and 2001 transitions. Word has length 97 [2021-05-06 08:20:47,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:47,104 INFO L480 AbstractCegarLoop]: Abstraction has 1454 states and 2001 transitions. [2021-05-06 08:20:47,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:20:47,104 INFO L276 IsEmpty]: Start isEmpty. Operand 1454 states and 2001 transitions. [2021-05-06 08:20:47,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-06 08:20:47,106 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:47,106 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 5, 4, 3, 3, 3, 3, 2, 2, 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] [2021-05-06 08:20:47,320 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-06 08:20:47,321 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:47,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:47,321 INFO L82 PathProgramCache]: Analyzing trace with hash 672019267, now seen corresponding path program 3 times [2021-05-06 08:20:47,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:47,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150601132] [2021-05-06 08:20:47,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:47,327 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:47,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2077003090] [2021-05-06 08:20:47,327 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:47,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-06 08:20:47,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-05-06 08:20:47,425 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 08:20:47,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 08:20:47,484 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 08:20:47,585 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-06 08:20:47,585 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 08:20:47,808 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-06 08:20:47,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:20:47 BasicIcfg [2021-05-06 08:20:47,874 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 08:20:47,875 INFO L168 Benchmark]: Toolchain (without parser) took 27237.61 ms. Allocated memory was 199.2 MB in the beginning and 476.1 MB in the end (delta: 276.8 MB). Free memory was 163.8 MB in the beginning and 273.6 MB in the end (delta: -109.8 MB). Peak memory consumption was 168.0 MB. Max. memory is 8.0 GB. [2021-05-06 08:20:47,875 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 199.2 MB. Free memory is still 181.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 08:20:47,875 INFO L168 Benchmark]: CACSL2BoogieTranslator took 248.38 ms. Allocated memory is still 199.2 MB. Free memory was 163.7 MB in the beginning and 181.7 MB in the end (delta: -18.0 MB). Peak memory consumption was 11.9 MB. Max. memory is 8.0 GB. [2021-05-06 08:20:47,875 INFO L168 Benchmark]: Boogie Preprocessor took 42.75 ms. Allocated memory is still 199.2 MB. Free memory was 181.7 MB in the beginning and 180.1 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 08:20:47,875 INFO L168 Benchmark]: RCFGBuilder took 339.04 ms. Allocated memory is still 199.2 MB. Free memory was 179.6 MB in the beginning and 162.3 MB in the end (delta: 17.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-06 08:20:47,875 INFO L168 Benchmark]: IcfgTransformer took 16.51 ms. Allocated memory is still 199.2 MB. Free memory was 162.3 MB in the beginning and 161.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 08:20:47,875 INFO L168 Benchmark]: TraceAbstraction took 26581.50 ms. Allocated memory was 199.2 MB in the beginning and 476.1 MB in the end (delta: 276.8 MB). Free memory was 160.7 MB in the beginning and 273.6 MB in the end (delta: -112.8 MB). Peak memory consumption was 164.5 MB. Max. memory is 8.0 GB. [2021-05-06 08:20:47,882 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 199.2 MB. Free memory is still 181.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 248.38 ms. Allocated memory is still 199.2 MB. Free memory was 163.7 MB in the beginning and 181.7 MB in the end (delta: -18.0 MB). Peak memory consumption was 11.9 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 42.75 ms. Allocated memory is still 199.2 MB. Free memory was 181.7 MB in the beginning and 180.1 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 8.0 GB. * RCFGBuilder took 339.04 ms. Allocated memory is still 199.2 MB. Free memory was 179.6 MB in the beginning and 162.3 MB in the end (delta: 17.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * IcfgTransformer took 16.51 ms. Allocated memory is still 199.2 MB. Free memory was 162.3 MB in the beginning and 161.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 26581.50 ms. Allocated memory was 199.2 MB in the beginning and 476.1 MB in the end (delta: 276.8 MB). Free memory was 160.7 MB in the beginning and 273.6 MB in the end (delta: -112.8 MB). Peak memory consumption was 164.5 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)=17, counter=0] [L20] int x, y; [L21] long long a, b, p, q, r, s; [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=3, y=5] [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=3, y=5] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [\old(counter)=0, a=3, b=5, counter=0, p=1, q=0, r=0, s=1, x=3, y=5] [L34] EXPR counter++ VAL [\old(counter)=0, a=3, b=5, counter=1, counter++=0, p=1, q=0, r=0, s=1, x=3, y=5] [L34] COND TRUE counter++<10 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=3, b=5, c=3, counter=1, k=0, p=1, q=0, r=0, s=1, x=3, y=5] [L41] EXPR counter++ VAL [\old(counter)=0, a=3, b=5, c=3, counter=2, counter++=1, k=0, p=1, q=0, r=0, s=1, x=3, y=5] [L41] COND TRUE counter++<10 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=3, b=5, c=3, counter=2, k=0, p=1, q=0, r=0, s=1, x=3, y=5] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=5, b=3, c=3, counter=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=3, y=5] [L34] EXPR counter++ VAL [\old(counter)=0, a=5, b=3, c=3, counter=3, counter++=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=3, y=5] [L34] COND TRUE counter++<10 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=5, b=3, c=5, counter=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=3, y=5] [L41] EXPR counter++ VAL [\old(counter)=0, a=5, b=3, c=5, counter=4, counter++=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=3, y=5] [L41] COND TRUE counter++<10 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=5, b=3, c=5, counter=4, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=3, x=3, y=5] [L48] EXPR counter++ VAL [\old(counter)=0, a=5, b=3, c=5, counter=5, counter++=4, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=3, x=3, y=5] [L48] COND TRUE counter++<10 [L49] 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] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=5, b=3, c=5, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=3, x=3, y=5] [L50] 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] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=5, b=3, c=5, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=3, x=3, y=5] [L51] 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] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=5, b=3, c=5, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=3, x=3, y=5] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=5, b=3, c=5, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=3, x=3, y=5] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=5, b=3, c=5, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=3, x=3, y=5] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=5, b=3, c=2, counter=5, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=3, x=3, y=5] [L41] EXPR counter++ VAL [\old(counter)=0, a=5, b=3, c=2, counter=6, counter++=5, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=3, x=3, y=5] [L41] COND TRUE counter++<10 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=5, b=3, c=2, counter=6, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=3, x=3, y=5] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=3, b=2, c=2, counter=6, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=3, x=3, y=5] [L34] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=2, counter=7, counter++=6, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=3, x=3, y=5] [L34] COND TRUE counter++<10 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=3, b=2, c=3, counter=7, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=3, x=3, y=5] [L41] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=3, counter=8, counter++=7, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=3, x=3, y=5] [L41] COND TRUE counter++<10 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=3, b=2, c=3, counter=8, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=2, x=3, y=5] [L48] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=3, counter=9, counter++=8, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=2, x=3, y=5] [L48] COND TRUE counter++<10 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=3, b=2, c=3, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=2, x=3, y=5] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=3, b=2, c=3, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=2, x=3, y=5] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=3, b=2, c=3, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=2, x=3, y=5] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=3, b=2, c=3, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=2, x=3, y=5] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=3, b=2, c=3, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=2, x=3, y=5] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=3, b=2, c=1, counter=9, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=2, x=3, y=5] [L41] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=1, counter=10, counter++=9, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=2, x=3, y=5] [L41] COND TRUE counter++<10 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=3, b=2, c=1, counter=10, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=2, x=3, y=5] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=2, b=1, c=1, counter=10, d=1, k=1, p=-1, q=2, r=1, s=-1, temp=0, v=2, x=3, y=5] [L34] EXPR counter++ VAL [\old(counter)=0, a=2, b=1, c=1, counter=11, counter++=10, d=1, k=1, p=-1, q=2, r=1, s=-1, temp=0, v=2, x=3, y=5] [L34] COND FALSE !(counter++<10) [L73] CALL __VERIFIER_assert(p*x - q*x + r*y - s*y == a) VAL [\old(cond)=0, \old(counter)=0, counter=11] [L11] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=11] [L13] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=11] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 26476.0ms, OverallIterations: 40, TraceHistogramMax: 12, EmptinessCheckTime: 41.2ms, AutomataDifference: 7278.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2312 SDtfs, 2828 SDslu, 9614 SDs, 0 SdLazy, 5866 SolverSat, 1570 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4102.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2326 GetRequests, 1891 SyntacticMatches, 4 SemanticMatches, 431 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 3537.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1454occurred in iteration=39, InterpolantAutomatonStates: 433, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 623.6ms AutomataMinimizationTime, 39 MinimizatonAttempts, 1356 StatesRemovedByMinimization, 36 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 517.5ms SsaConstructionTime, 1274.4ms SatisfiabilityAnalysisTime, 6369.2ms InterpolantComputationTime, 2304 NumberOfCodeBlocks, 2249 NumberOfCodeBlocksAsserted, 63 NumberOfCheckSat, 2167 ConstructedInterpolants, 0 QuantifiedInterpolants, 8991 SizeOfPredicates, 202 NumberOfNonLiveVariables, 8615 ConjunctsInSsa, 756 ConjunctsInUnsatCore, 39 InterpolantComputations, 11 PerfectInterpolantSequences, 1730/2444 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! Received shutdown request...