/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_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:22:36,437 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:22:36,439 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:22:36,473 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 08:22:36,490 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:22:36,491 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:22:36,494 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:22:36,495 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:22:36,497 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:22:36,498 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:22:36,500 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:22:36,504 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:22:36,504 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:22:36,505 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:22:36,506 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:22:36,506 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:22:36,508 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 08:22:36,532 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:22:36,533 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:22:36,533 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:22:36,537 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:22:36,548 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:22:36,548 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:22:36,550 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:22:36,550 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:22:36,550 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:22:36,550 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:22:36,550 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:22:36,551 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:22:36,551 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:22:36,551 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:22:36,551 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:22:36,551 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:22:36,552 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:22:36,552 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:22:36,552 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:22:36,552 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:22:36,552 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:22:36,552 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:22:36,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:22:36,552 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:22:36,552 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:22:36,553 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:22:36,553 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:22:36,791 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:22:36,810 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:22:36,812 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:22:36,813 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:22:36,814 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:22:36,815 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound20.c [2021-05-06 08:22:36,862 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a29de3bc/5b12dbc777fd448b96b10693fbb7c292/FLAGc1e626b56 [2021-05-06 08:22:37,222 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:22:37,223 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound20.c [2021-05-06 08:22:37,230 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a29de3bc/5b12dbc777fd448b96b10693fbb7c292/FLAGc1e626b56 [2021-05-06 08:22:37,239 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a29de3bc/5b12dbc777fd448b96b10693fbb7c292 [2021-05-06 08:22:37,241 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:22:37,242 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:22:37,243 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:22:37,243 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:22:37,246 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:22:37,246 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:22:37" (1/1) ... [2021-05-06 08:22:37,247 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c9701ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:37, skipping insertion in model container [2021-05-06 08:22:37,247 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:22:37" (1/1) ... [2021-05-06 08:22:37,251 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:22:37,266 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:22:37,381 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_valuebound20.c[490,503] [2021-05-06 08:22:37,406 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:22:37,413 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:22:37,452 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_valuebound20.c[490,503] [2021-05-06 08:22:37,460 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:22:37,472 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:22:37,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:37 WrapperNode [2021-05-06 08:22:37,473 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:22:37,474 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:22:37,474 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:22:37,474 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:22:37,481 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:37" (1/1) ... [2021-05-06 08:22:37,482 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:37" (1/1) ... [2021-05-06 08:22:37,492 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:37" (1/1) ... [2021-05-06 08:22:37,493 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:37" (1/1) ... [2021-05-06 08:22:37,502 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:37" (1/1) ... [2021-05-06 08:22:37,519 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:37" (1/1) ... [2021-05-06 08:22:37,520 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:37" (1/1) ... [2021-05-06 08:22:37,521 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:22:37,522 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:22:37,522 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:22:37,522 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:22:37,522 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:37" (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 08:22:37,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:22:37,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:22:37,578 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:22:37,578 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:22:37,578 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:22:37,579 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:22:37,579 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:22:37,579 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:22:37,579 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:22:37,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:22:37,580 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 08:22:37,580 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:22:37,580 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:22:37,580 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:22:37,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:22:37,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:22:37,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:22:37,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:22:37,581 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:22:37,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:22:37,861 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:22:37,862 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-06 08:22:37,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:22:37 BoogieIcfgContainer [2021-05-06 08:22:37,863 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:22:37,863 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:22:37,863 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:22:37,864 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:22:37,865 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:22:37" (1/1) ... [2021-05-06 08:22:37,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:22:37 BasicIcfg [2021-05-06 08:22:37,877 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:22:37,878 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:22:37,878 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:22:37,882 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:22:37,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:22:37" (1/4) ... [2021-05-06 08:22:37,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61751857 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:22:37, skipping insertion in model container [2021-05-06 08:22:37,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:37" (2/4) ... [2021-05-06 08:22:37,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61751857 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:22:37, skipping insertion in model container [2021-05-06 08:22:37,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:22:37" (3/4) ... [2021-05-06 08:22:37,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61751857 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:22:37, skipping insertion in model container [2021-05-06 08:22:37,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:22:37" (4/4) ... [2021-05-06 08:22:37,884 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound20.cJordan [2021-05-06 08:22:37,887 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:22:37,891 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:22:37,901 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:22:37,914 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:22:37,914 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:22:37,914 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:22:37,914 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:22:37,914 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:22:37,914 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:22:37,914 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:22:37,914 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:22:37,930 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 08:22:37,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 08:22:37,935 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:37,935 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:37,935 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:37,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:37,939 INFO L82 PathProgramCache]: Analyzing trace with hash 958536290, now seen corresponding path program 1 times [2021-05-06 08:22:37,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:37,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415074198] [2021-05-06 08:22:37,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:38,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:38,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:22:38,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:38,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:22:38,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:38,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 08:22:38,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:38,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 08:22:38,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:38,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-06 08:22:38,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:38,091 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 08:22:38,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:38,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415074198] [2021-05-06 08:22:38,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415074198] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:22:38,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:22:38,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 08:22:38,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106312097] [2021-05-06 08:22:38,095 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 08:22:38,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:38,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 08:22:38,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:22:38,105 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:22:38,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:38,190 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2021-05-06 08:22:38,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 08:22:38,192 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-06 08:22:38,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:38,197 INFO L225 Difference]: With dead ends: 40 [2021-05-06 08:22:38,197 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 08:22:38,198 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:22:38,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 08:22:38,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 08:22:38,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 08:22:38,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2021-05-06 08:22:38,231 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 33 [2021-05-06 08:22:38,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:38,231 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2021-05-06 08:22:38,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:22:38,232 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2021-05-06 08:22:38,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 08:22:38,234 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:38,234 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:38,234 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 08:22:38,235 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:38,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:38,236 INFO L82 PathProgramCache]: Analyzing trace with hash 641145651, now seen corresponding path program 1 times [2021-05-06 08:22:38,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:38,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112040518] [2021-05-06 08:22:38,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:38,254 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:38,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [310378288] [2021-05-06 08:22:38,254 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 08:22:38,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:38,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:22:38,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:38,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,428 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-06 08:22:38,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:38,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112040518] [2021-05-06 08:22:38,429 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:38,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310378288] [2021-05-06 08:22:38,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310378288] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:22:38,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:22:38,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 08:22:38,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614785412] [2021-05-06 08:22:38,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:22:38,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:38,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:22:38,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:22:38,431 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 08:22:38,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:38,550 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2021-05-06 08:22:38,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:22:38,550 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2021-05-06 08:22:38,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:38,551 INFO L225 Difference]: With dead ends: 47 [2021-05-06 08:22:38,551 INFO L226 Difference]: Without dead ends: 47 [2021-05-06 08:22:38,552 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 30.0ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:22:38,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-06 08:22:38,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2021-05-06 08:22:38,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 08:22:38,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-06 08:22:38,573 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 34 [2021-05-06 08:22:38,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:38,573 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-06 08:22:38,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 08:22:38,573 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-06 08:22:38,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 08:22:38,574 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:38,574 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:38,775 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 08:22:38,775 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:38,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:38,776 INFO L82 PathProgramCache]: Analyzing trace with hash 283168444, now seen corresponding path program 1 times [2021-05-06 08:22:38,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:38,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689923043] [2021-05-06 08:22:38,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:38,795 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:38,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1227235711] [2021-05-06 08:22:38,795 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 08:22:38,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:38,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:22:38,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:38,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,085 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:22:39,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:39,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689923043] [2021-05-06 08:22:39,086 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:39,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227235711] [2021-05-06 08:22:39,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227235711] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:39,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:39,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:22:39,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020461629] [2021-05-06 08:22:39,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:22:39,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:39,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:22:39,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:22:39,087 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:22:39,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:39,188 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2021-05-06 08:22:39,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:22:39,189 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2021-05-06 08:22:39,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:39,193 INFO L225 Difference]: With dead ends: 51 [2021-05-06 08:22:39,193 INFO L226 Difference]: Without dead ends: 51 [2021-05-06 08:22:39,194 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 57.2ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:22:39,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-06 08:22:39,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2021-05-06 08:22:39,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 08:22:39,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2021-05-06 08:22:39,212 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 37 [2021-05-06 08:22:39,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:39,213 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2021-05-06 08:22:39,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:22:39,213 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2021-05-06 08:22:39,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 08:22:39,214 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:39,214 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:39,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:39,425 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:39,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:39,430 INFO L82 PathProgramCache]: Analyzing trace with hash 656144812, now seen corresponding path program 1 times [2021-05-06 08:22:39,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:39,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586837847] [2021-05-06 08:22:39,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:39,442 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:39,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1481922088] [2021-05-06 08:22:39,442 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 08:22:39,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:39,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:22:39,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:39,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,613 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-06 08:22:39,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:39,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586837847] [2021-05-06 08:22:39,613 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:39,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481922088] [2021-05-06 08:22:39,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481922088] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:39,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:39,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:22:39,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629429605] [2021-05-06 08:22:39,614 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:22:39,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:39,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:22:39,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:22:39,615 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:22:39,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:39,770 INFO L93 Difference]: Finished difference Result 96 states and 136 transitions. [2021-05-06 08:22:39,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:22:39,770 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2021-05-06 08:22:39,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:39,771 INFO L225 Difference]: With dead ends: 96 [2021-05-06 08:22:39,771 INFO L226 Difference]: Without dead ends: 96 [2021-05-06 08:22:39,772 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 62.3ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:22:39,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-06 08:22:39,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2021-05-06 08:22:39,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 48 states have internal predecessors, (59), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 08:22:39,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2021-05-06 08:22:39,778 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 39 [2021-05-06 08:22:39,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:39,778 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2021-05-06 08:22:39,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:22:39,778 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2021-05-06 08:22:39,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 08:22:39,779 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:39,779 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:39,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:39,995 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:39,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:39,997 INFO L82 PathProgramCache]: Analyzing trace with hash -2079765955, now seen corresponding path program 1 times [2021-05-06 08:22:39,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:39,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570579585] [2021-05-06 08:22:39,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:40,012 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:40,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [825768271] [2021-05-06 08:22:40,012 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 08:22:40,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:40,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 08:22:40,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:40,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:40,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:40,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:40,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:40,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:40,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:40,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:40,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:40,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:40,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:40,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:40,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:40,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:40,245 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:22:40,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:40,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570579585] [2021-05-06 08:22:40,245 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:40,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825768271] [2021-05-06 08:22:40,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825768271] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:40,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:40,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:22:40,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537702655] [2021-05-06 08:22:40,246 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:22:40,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:40,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:22:40,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:22:40,247 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 08:22:40,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:40,491 INFO L93 Difference]: Finished difference Result 84 states and 112 transitions. [2021-05-06 08:22:40,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:22:40,496 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2021-05-06 08:22:40,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:40,500 INFO L225 Difference]: With dead ends: 84 [2021-05-06 08:22:40,500 INFO L226 Difference]: Without dead ends: 84 [2021-05-06 08:22:40,500 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 173.9ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:22:40,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-06 08:22:40,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 75. [2021-05-06 08:22:40,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.24) internal successors, (62), 51 states have internal predecessors, (62), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 08:22:40,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2021-05-06 08:22:40,515 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 42 [2021-05-06 08:22:40,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:40,515 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2021-05-06 08:22:40,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 08:22:40,515 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2021-05-06 08:22:40,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 08:22:40,516 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:40,516 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:40,716 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:40,717 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:40,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:40,717 INFO L82 PathProgramCache]: Analyzing trace with hash 446575011, now seen corresponding path program 1 times [2021-05-06 08:22:40,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:40,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434622216] [2021-05-06 08:22:40,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:40,729 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:40,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [546297598] [2021-05-06 08:22:40,729 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 08:22:40,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:40,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-06 08:22:40,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:40,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:40,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:40,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:40,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:40,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:40,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:40,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:40,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:40,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:40,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:40,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:40,993 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:22:40,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:40,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434622216] [2021-05-06 08:22:40,993 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:40,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546297598] [2021-05-06 08:22:40,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546297598] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:40,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:40,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:22:40,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235460632] [2021-05-06 08:22:40,994 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:22:40,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:40,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:22:40,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:22:40,995 INFO L87 Difference]: Start difference. First operand 75 states and 98 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 08:22:41,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:41,247 INFO L93 Difference]: Finished difference Result 103 states and 137 transitions. [2021-05-06 08:22:41,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:22:41,247 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 42 [2021-05-06 08:22:41,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:41,248 INFO L225 Difference]: With dead ends: 103 [2021-05-06 08:22:41,248 INFO L226 Difference]: Without dead ends: 103 [2021-05-06 08:22:41,248 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 149.5ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:22:41,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-06 08:22:41,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 93. [2021-05-06 08:22:41,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 64 states have internal predecessors, (78), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 08:22:41,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 122 transitions. [2021-05-06 08:22:41,269 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 122 transitions. Word has length 42 [2021-05-06 08:22:41,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:41,270 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 122 transitions. [2021-05-06 08:22:41,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 08:22:41,270 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 122 transitions. [2021-05-06 08:22:41,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 08:22:41,270 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:41,271 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:41,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 08:22:41,477 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:41,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:41,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1977261252, now seen corresponding path program 1 times [2021-05-06 08:22:41,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:41,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452379839] [2021-05-06 08:22:41,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:41,486 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:41,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1631066861] [2021-05-06 08:22:41,487 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 08:22:41,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:41,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:22:41,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:41,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:41,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:41,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:41,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:41,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:41,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:41,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:41,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:41,648 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-05-06 08:22:41,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:41,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452379839] [2021-05-06 08:22:41,648 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:41,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631066861] [2021-05-06 08:22:41,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631066861] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:22:41,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:22:41,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-06 08:22:41,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784147492] [2021-05-06 08:22:41,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:22:41,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:41,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:22:41,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:22:41,657 INFO L87 Difference]: Start difference. First operand 93 states and 122 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:22:41,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:41,763 INFO L93 Difference]: Finished difference Result 105 states and 138 transitions. [2021-05-06 08:22:41,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:22:41,763 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2021-05-06 08:22:41,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:41,766 INFO L225 Difference]: With dead ends: 105 [2021-05-06 08:22:41,766 INFO L226 Difference]: Without dead ends: 105 [2021-05-06 08:22:41,766 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 53.2ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:22:41,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-05-06 08:22:41,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2021-05-06 08:22:41,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 68 states have (on average 1.2352941176470589) internal successors, (84), 69 states have internal predecessors, (84), 27 states have call successors, (27), 8 states have call predecessors, (27), 7 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-06 08:22:41,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 136 transitions. [2021-05-06 08:22:41,771 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 136 transitions. Word has length 47 [2021-05-06 08:22:41,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:41,771 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 136 transitions. [2021-05-06 08:22:41,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:22:41,771 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 136 transitions. [2021-05-06 08:22:41,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 08:22:41,772 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:41,772 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:41,984 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:41,987 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:41,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:41,987 INFO L82 PathProgramCache]: Analyzing trace with hash -846684234, now seen corresponding path program 1 times [2021-05-06 08:22:41,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:41,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667616613] [2021-05-06 08:22:41,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:42,012 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:42,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1905349794] [2021-05-06 08:22:42,013 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 08:22:42,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:42,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 08:22:42,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:42,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,173 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 08:22:42,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:42,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667616613] [2021-05-06 08:22:42,173 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:42,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905349794] [2021-05-06 08:22:42,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905349794] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:42,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:42,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:22:42,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729273090] [2021-05-06 08:22:42,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:22:42,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:42,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:22:42,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:22:42,175 INFO L87 Difference]: Start difference. First operand 103 states and 136 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 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 08:22:42,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:42,274 INFO L93 Difference]: Finished difference Result 111 states and 143 transitions. [2021-05-06 08:22:42,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:22:42,274 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 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 47 [2021-05-06 08:22:42,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:42,275 INFO L225 Difference]: With dead ends: 111 [2021-05-06 08:22:42,275 INFO L226 Difference]: Without dead ends: 111 [2021-05-06 08:22:42,276 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 41.8ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:22:42,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-06 08:22:42,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2021-05-06 08:22:42,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 71 states have (on average 1.2253521126760563) internal successors, (87), 72 states have internal predecessors, (87), 27 states have call successors, (27), 9 states have call predecessors, (27), 8 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-06 08:22:42,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 139 transitions. [2021-05-06 08:22:42,280 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 139 transitions. Word has length 47 [2021-05-06 08:22:42,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:42,280 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 139 transitions. [2021-05-06 08:22:42,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 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 08:22:42,280 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 139 transitions. [2021-05-06 08:22:42,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 08:22:42,281 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:42,281 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:42,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:42,501 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:42,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:42,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1679656732, now seen corresponding path program 2 times [2021-05-06 08:22:42,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:42,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619306243] [2021-05-06 08:22:42,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:42,508 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:42,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [769365610] [2021-05-06 08:22:42,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:42,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:22:42,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:42,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:22:42,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:42,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:42,635 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 08:22:42,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:42,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619306243] [2021-05-06 08:22:42,635 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:42,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769365610] [2021-05-06 08:22:42,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769365610] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:22:42,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:22:42,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:22:42,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686430415] [2021-05-06 08:22:42,637 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:22:42,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:42,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:22:42,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:22:42,637 INFO L87 Difference]: Start difference. First operand 107 states and 139 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 08:22:42,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:42,689 INFO L93 Difference]: Finished difference Result 110 states and 143 transitions. [2021-05-06 08:22:42,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:22:42,690 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 47 [2021-05-06 08:22:42,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:42,691 INFO L225 Difference]: With dead ends: 110 [2021-05-06 08:22:42,691 INFO L226 Difference]: Without dead ends: 110 [2021-05-06 08:22:42,691 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 15.2ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:22:42,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-06 08:22:42,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 90. [2021-05-06 08:22:42,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 59 states have internal predecessors, (68), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 08:22:42,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 112 transitions. [2021-05-06 08:22:42,694 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 112 transitions. Word has length 47 [2021-05-06 08:22:42,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:42,695 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 112 transitions. [2021-05-06 08:22:42,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 08:22:42,695 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 112 transitions. [2021-05-06 08:22:42,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-06 08:22:42,695 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:42,696 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:42,912 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-06 08:22:42,913 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:42,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:42,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1660248707, now seen corresponding path program 1 times [2021-05-06 08:22:42,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:42,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105855100] [2021-05-06 08:22:42,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:42,920 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:42,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [860339939] [2021-05-06 08:22:42,920 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 08:22:42,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:42,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:22:42,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:43,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:43,044 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-06 08:22:43,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:43,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105855100] [2021-05-06 08:22:43,044 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:43,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860339939] [2021-05-06 08:22:43,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860339939] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:22:43,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:22:43,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:22:43,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060290154] [2021-05-06 08:22:43,045 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:22:43,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:43,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:22:43,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:22:43,045 INFO L87 Difference]: Start difference. First operand 90 states and 112 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 08:22:43,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:43,078 INFO L93 Difference]: Finished difference Result 128 states and 172 transitions. [2021-05-06 08:22:43,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:22:43,079 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2021-05-06 08:22:43,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:43,079 INFO L225 Difference]: With dead ends: 128 [2021-05-06 08:22:43,079 INFO L226 Difference]: Without dead ends: 128 [2021-05-06 08:22:43,080 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:22:43,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-05-06 08:22:43,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 114. [2021-05-06 08:22:43,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 70 states have internal predecessors, (75), 39 states have call successors, (39), 10 states have call predecessors, (39), 9 states have return successors, (37), 33 states have call predecessors, (37), 37 states have call successors, (37) [2021-05-06 08:22:43,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 151 transitions. [2021-05-06 08:22:43,084 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 151 transitions. Word has length 52 [2021-05-06 08:22:43,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:43,084 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 151 transitions. [2021-05-06 08:22:43,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 08:22:43,084 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 151 transitions. [2021-05-06 08:22:43,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-06 08:22:43,085 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:43,085 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:43,300 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:43,301 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:43,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:43,301 INFO L82 PathProgramCache]: Analyzing trace with hash 846041443, now seen corresponding path program 1 times [2021-05-06 08:22:43,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:43,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822294651] [2021-05-06 08:22:43,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:43,308 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:43,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1709750476] [2021-05-06 08:22:43,308 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 08:22:43,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:43,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 08:22:43,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:43,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:43,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:43,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:43,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:43,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:43,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:43,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:43,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:43,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:43,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:43,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:43,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:43,477 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-05-06 08:22:43,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:43,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822294651] [2021-05-06 08:22:43,478 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:43,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709750476] [2021-05-06 08:22:43,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709750476] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:43,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:43,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:22:43,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746297923] [2021-05-06 08:22:43,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:22:43,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:43,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:22:43,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:22:43,479 INFO L87 Difference]: Start difference. First operand 114 states and 151 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:22:43,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:43,712 INFO L93 Difference]: Finished difference Result 164 states and 229 transitions. [2021-05-06 08:22:43,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:22:43,713 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 52 [2021-05-06 08:22:43,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:43,715 INFO L225 Difference]: With dead ends: 164 [2021-05-06 08:22:43,715 INFO L226 Difference]: Without dead ends: 164 [2021-05-06 08:22:43,715 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 96.1ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:22:43,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-05-06 08:22:43,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 92. [2021-05-06 08:22:43,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 53 states have (on average 1.150943396226415) internal successors, (61), 57 states have internal predecessors, (61), 31 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (29), 26 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-06 08:22:43,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 121 transitions. [2021-05-06 08:22:43,720 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 121 transitions. Word has length 52 [2021-05-06 08:22:43,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:43,721 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 121 transitions. [2021-05-06 08:22:43,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:22:43,721 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 121 transitions. [2021-05-06 08:22:43,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-06 08:22:43,721 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:43,722 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:43,938 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:43,938 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:43,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:43,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1094467600, now seen corresponding path program 1 times [2021-05-06 08:22:43,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:43,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74950624] [2021-05-06 08:22:43,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:43,953 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:43,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [901787745] [2021-05-06 08:22:43,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:44,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:44,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 62 conjunts are in the unsatisfiable core [2021-05-06 08:22:44,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:44,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:44,266 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-05-06 08:22:44,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:44,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74950624] [2021-05-06 08:22:44,267 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:44,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901787745] [2021-05-06 08:22:44,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901787745] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:44,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:44,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:22:44,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948629735] [2021-05-06 08:22:44,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:22:44,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:44,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:22:44,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:22:44,268 INFO L87 Difference]: Start difference. First operand 92 states and 121 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:22:44,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:44,597 INFO L93 Difference]: Finished difference Result 176 states and 241 transitions. [2021-05-06 08:22:44,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:22:44,598 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 64 [2021-05-06 08:22:44,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:44,599 INFO L225 Difference]: With dead ends: 176 [2021-05-06 08:22:44,599 INFO L226 Difference]: Without dead ends: 175 [2021-05-06 08:22:44,599 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 174.4ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:22:44,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-05-06 08:22:44,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 171. [2021-05-06 08:22:44,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 95 states have (on average 1.168421052631579) internal successors, (111), 102 states have internal predecessors, (111), 63 states have call successors, (63), 13 states have call predecessors, (63), 12 states have return successors, (61), 55 states have call predecessors, (61), 61 states have call successors, (61) [2021-05-06 08:22:44,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 235 transitions. [2021-05-06 08:22:44,606 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 235 transitions. Word has length 64 [2021-05-06 08:22:44,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:44,606 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 235 transitions. [2021-05-06 08:22:44,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:22:44,606 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 235 transitions. [2021-05-06 08:22:44,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-06 08:22:44,607 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:44,607 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:44,811 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 08:22:44,811 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:44,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:44,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1523533001, now seen corresponding path program 2 times [2021-05-06 08:22:44,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:44,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330493781] [2021-05-06 08:22:44,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:44,817 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:44,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1181977722] [2021-05-06 08:22:44,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:44,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:22:44,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:44,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-06 08:22:44,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:44,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:44,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:44,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:44,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:44,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:44,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:44,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:44,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:44,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:44,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:44,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:44,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:44,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:44,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:44,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,018 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-06 08:22:45,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:45,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330493781] [2021-05-06 08:22:45,018 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:45,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181977722] [2021-05-06 08:22:45,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181977722] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:45,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:45,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:22:45,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951654433] [2021-05-06 08:22:45,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:22:45,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:45,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:22:45,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:22:45,019 INFO L87 Difference]: Start difference. First operand 171 states and 235 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 08:22:45,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:45,241 INFO L93 Difference]: Finished difference Result 281 states and 417 transitions. [2021-05-06 08:22:45,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 08:22:45,253 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 69 [2021-05-06 08:22:45,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:45,255 INFO L225 Difference]: With dead ends: 281 [2021-05-06 08:22:45,255 INFO L226 Difference]: Without dead ends: 281 [2021-05-06 08:22:45,256 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 101.6ms TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-05-06 08:22:45,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-05-06 08:22:45,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 196. [2021-05-06 08:22:45,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 112 states have (on average 1.1964285714285714) internal successors, (134), 118 states have internal predecessors, (134), 71 states have call successors, (71), 13 states have call predecessors, (71), 12 states have return successors, (69), 64 states have call predecessors, (69), 69 states have call successors, (69) [2021-05-06 08:22:45,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 274 transitions. [2021-05-06 08:22:45,271 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 274 transitions. Word has length 69 [2021-05-06 08:22:45,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:45,272 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 274 transitions. [2021-05-06 08:22:45,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 08:22:45,272 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 274 transitions. [2021-05-06 08:22:45,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-06 08:22:45,272 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:45,273 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:45,484 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 08:22:45,485 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:45,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:45,485 INFO L82 PathProgramCache]: Analyzing trace with hash 696944608, now seen corresponding path program 1 times [2021-05-06 08:22:45,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:45,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310308051] [2021-05-06 08:22:45,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:45,491 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:45,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [675871896] [2021-05-06 08:22:45,491 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 08:22:45,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:45,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-06 08:22:45,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:45,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,688 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 23 proven. 5 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-05-06 08:22:45,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:45,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310308051] [2021-05-06 08:22:45,689 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:45,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675871896] [2021-05-06 08:22:45,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675871896] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:45,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:45,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:22:45,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126831486] [2021-05-06 08:22:45,689 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:22:45,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:45,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:22:45,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:22:45,690 INFO L87 Difference]: Start difference. First operand 196 states and 274 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-06 08:22:45,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:45,854 INFO L93 Difference]: Finished difference Result 233 states and 328 transitions. [2021-05-06 08:22:45,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:22:45,854 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) Word has length 74 [2021-05-06 08:22:45,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:45,855 INFO L225 Difference]: With dead ends: 233 [2021-05-06 08:22:45,855 INFO L226 Difference]: Without dead ends: 233 [2021-05-06 08:22:45,856 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 64.0ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:22:45,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-05-06 08:22:45,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 221. [2021-05-06 08:22:45,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 123 states have (on average 1.1951219512195121) internal successors, (147), 130 states have internal predecessors, (147), 83 states have call successors, (83), 15 states have call predecessors, (83), 14 states have return successors, (81), 75 states have call predecessors, (81), 81 states have call successors, (81) [2021-05-06 08:22:45,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 311 transitions. [2021-05-06 08:22:45,864 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 311 transitions. Word has length 74 [2021-05-06 08:22:45,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:45,864 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 311 transitions. [2021-05-06 08:22:45,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-06 08:22:45,864 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 311 transitions. [2021-05-06 08:22:45,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-06 08:22:45,865 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:45,865 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:46,081 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 08:22:46,081 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:46,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:46,081 INFO L82 PathProgramCache]: Analyzing trace with hash -2010106522, now seen corresponding path program 1 times [2021-05-06 08:22:46,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:46,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456236691] [2021-05-06 08:22:46,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:46,087 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:46,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1118851379] [2021-05-06 08:22:46,087 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 08:22:46,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:46,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:22:46,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:46,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:46,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:46,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:46,256 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-05-06 08:22:46,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:46,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456236691] [2021-05-06 08:22:46,256 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:46,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118851379] [2021-05-06 08:22:46,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118851379] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:46,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:46,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:22:46,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121199219] [2021-05-06 08:22:46,257 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:22:46,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:46,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:22:46,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:22:46,257 INFO L87 Difference]: Start difference. First operand 221 states and 311 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 08:22:46,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:46,340 INFO L93 Difference]: Finished difference Result 233 states and 320 transitions. [2021-05-06 08:22:46,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:22:46,341 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 72 [2021-05-06 08:22:46,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:46,342 INFO L225 Difference]: With dead ends: 233 [2021-05-06 08:22:46,342 INFO L226 Difference]: Without dead ends: 233 [2021-05-06 08:22:46,343 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 41.6ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:22:46,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-05-06 08:22:46,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2021-05-06 08:22:46,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 132 states have (on average 1.1818181818181819) internal successors, (156), 139 states have internal predecessors, (156), 83 states have call successors, (83), 18 states have call predecessors, (83), 17 states have return successors, (81), 75 states have call predecessors, (81), 81 states have call successors, (81) [2021-05-06 08:22:46,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 320 transitions. [2021-05-06 08:22:46,349 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 320 transitions. Word has length 72 [2021-05-06 08:22:46,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:46,350 INFO L480 AbstractCegarLoop]: Abstraction has 233 states and 320 transitions. [2021-05-06 08:22:46,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 08:22:46,350 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 320 transitions. [2021-05-06 08:22:46,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-06 08:22:46,350 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:46,351 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:46,565 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:46,565 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:46,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:46,565 INFO L82 PathProgramCache]: Analyzing trace with hash 857620825, now seen corresponding path program 2 times [2021-05-06 08:22:46,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:46,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729579608] [2021-05-06 08:22:46,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:46,571 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:46,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1240556057] [2021-05-06 08:22:46,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:46,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:22:46,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:46,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-06 08:22:46,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:46,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:46,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:46,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:46,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:46,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:46,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:46,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:46,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:46,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:46,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:46,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:46,741 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-06 08:22:46,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:46,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729579608] [2021-05-06 08:22:46,742 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:46,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240556057] [2021-05-06 08:22:46,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240556057] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:22:46,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:22:46,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:22:46,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662757363] [2021-05-06 08:22:46,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:22:46,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:46,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:22:46,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:22:46,743 INFO L87 Difference]: Start difference. First operand 233 states and 320 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 08:22:46,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:46,780 INFO L93 Difference]: Finished difference Result 232 states and 304 transitions. [2021-05-06 08:22:46,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:22:46,780 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 77 [2021-05-06 08:22:46,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:46,781 INFO L225 Difference]: With dead ends: 232 [2021-05-06 08:22:46,781 INFO L226 Difference]: Without dead ends: 232 [2021-05-06 08:22:46,781 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 15.2ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:22:46,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-05-06 08:22:46,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 216. [2021-05-06 08:22:46,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 127 states have (on average 1.1653543307086613) internal successors, (148), 130 states have internal predecessors, (148), 71 states have call successors, (71), 18 states have call predecessors, (71), 17 states have return successors, (69), 67 states have call predecessors, (69), 69 states have call successors, (69) [2021-05-06 08:22:46,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 288 transitions. [2021-05-06 08:22:46,787 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 288 transitions. Word has length 77 [2021-05-06 08:22:46,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:46,787 INFO L480 AbstractCegarLoop]: Abstraction has 216 states and 288 transitions. [2021-05-06 08:22:46,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 08:22:46,787 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 288 transitions. [2021-05-06 08:22:46,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-06 08:22:46,788 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:46,788 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:47,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 08:22:47,005 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:47,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:47,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1813106047, now seen corresponding path program 3 times [2021-05-06 08:22:47,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:47,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406829931] [2021-05-06 08:22:47,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:47,011 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:47,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [891222828] [2021-05-06 08:22:47,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:47,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 08:22:47,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:47,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-06 08:22:47,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:47,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,151 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-05-06 08:22:47,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:47,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406829931] [2021-05-06 08:22:47,151 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:47,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891222828] [2021-05-06 08:22:47,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891222828] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:22:47,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:22:47,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:22:47,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971850950] [2021-05-06 08:22:47,152 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:22:47,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:47,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:22:47,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:22:47,153 INFO L87 Difference]: Start difference. First operand 216 states and 288 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-05-06 08:22:47,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:47,186 INFO L93 Difference]: Finished difference Result 236 states and 317 transitions. [2021-05-06 08:22:47,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:22:47,187 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 77 [2021-05-06 08:22:47,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:47,188 INFO L225 Difference]: With dead ends: 236 [2021-05-06 08:22:47,188 INFO L226 Difference]: Without dead ends: 236 [2021-05-06 08:22:47,188 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.3ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:22:47,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-05-06 08:22:47,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 232. [2021-05-06 08:22:47,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 134 states have (on average 1.171641791044776) internal successors, (157), 137 states have internal predecessors, (157), 79 states have call successors, (79), 19 states have call predecessors, (79), 18 states have return successors, (77), 75 states have call predecessors, (77), 77 states have call successors, (77) [2021-05-06 08:22:47,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 313 transitions. [2021-05-06 08:22:47,203 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 313 transitions. Word has length 77 [2021-05-06 08:22:47,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:47,204 INFO L480 AbstractCegarLoop]: Abstraction has 232 states and 313 transitions. [2021-05-06 08:22:47,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-05-06 08:22:47,204 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 313 transitions. [2021-05-06 08:22:47,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 08:22:47,204 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:47,204 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:47,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 08:22:47,433 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:47,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:47,433 INFO L82 PathProgramCache]: Analyzing trace with hash -747783847, now seen corresponding path program 1 times [2021-05-06 08:22:47,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:47,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864958624] [2021-05-06 08:22:47,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:47,439 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:47,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [220871220] [2021-05-06 08:22:47,439 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 08:22:47,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:47,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 08:22:47,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:47,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,683 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-05-06 08:22:47,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:47,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864958624] [2021-05-06 08:22:47,683 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:47,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220871220] [2021-05-06 08:22:47,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220871220] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:47,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:47,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:22:47,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062266481] [2021-05-06 08:22:47,685 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:22:47,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:47,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:22:47,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:22:47,686 INFO L87 Difference]: Start difference. First operand 232 states and 313 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 08:22:47,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:47,984 INFO L93 Difference]: Finished difference Result 309 states and 421 transitions. [2021-05-06 08:22:47,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 08:22:47,985 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 79 [2021-05-06 08:22:47,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:47,986 INFO L225 Difference]: With dead ends: 309 [2021-05-06 08:22:47,986 INFO L226 Difference]: Without dead ends: 309 [2021-05-06 08:22:47,986 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 131.7ms TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-05-06 08:22:47,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-05-06 08:22:47,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 250. [2021-05-06 08:22:47,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 142 states have (on average 1.1619718309859155) internal successors, (165), 147 states have internal predecessors, (165), 87 states have call successors, (87), 21 states have call predecessors, (87), 20 states have return successors, (85), 81 states have call predecessors, (85), 85 states have call successors, (85) [2021-05-06 08:22:47,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 337 transitions. [2021-05-06 08:22:47,993 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 337 transitions. Word has length 79 [2021-05-06 08:22:47,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:47,993 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 337 transitions. [2021-05-06 08:22:47,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 08:22:47,993 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 337 transitions. [2021-05-06 08:22:47,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-06 08:22:47,994 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:47,994 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:48,194 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 08:22:48,194 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:48,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:48,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1988197843, now seen corresponding path program 4 times [2021-05-06 08:22:48,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:48,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381856440] [2021-05-06 08:22:48,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:48,200 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:48,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1043212767] [2021-05-06 08:22:48,200 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:48,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:22:48,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:48,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 55 conjunts are in the unsatisfiable core [2021-05-06 08:22:48,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:48,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,547 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 10 proven. 22 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-05-06 08:22:48,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:48,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381856440] [2021-05-06 08:22:48,548 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:48,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043212767] [2021-05-06 08:22:48,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043212767] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:48,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:48,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:22:48,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697106341] [2021-05-06 08:22:48,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:22:48,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:48,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:22:48,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:22:48,549 INFO L87 Difference]: Start difference. First operand 250 states and 337 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-06 08:22:48,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:48,940 INFO L93 Difference]: Finished difference Result 315 states and 420 transitions. [2021-05-06 08:22:48,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:22:48,940 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 77 [2021-05-06 08:22:48,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:48,941 INFO L225 Difference]: With dead ends: 315 [2021-05-06 08:22:48,942 INFO L226 Difference]: Without dead ends: 315 [2021-05-06 08:22:48,942 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 269.7ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:22:48,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-05-06 08:22:48,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 297. [2021-05-06 08:22:48,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 170 states have (on average 1.1647058823529413) internal successors, (198), 175 states have internal predecessors, (198), 103 states have call successors, (103), 24 states have call predecessors, (103), 23 states have return successors, (101), 97 states have call predecessors, (101), 101 states have call successors, (101) [2021-05-06 08:22:48,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 402 transitions. [2021-05-06 08:22:48,948 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 402 transitions. Word has length 77 [2021-05-06 08:22:48,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:48,948 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 402 transitions. [2021-05-06 08:22:48,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-06 08:22:48,948 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 402 transitions. [2021-05-06 08:22:48,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-06 08:22:48,949 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:48,949 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:49,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:49,165 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:49,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:49,165 INFO L82 PathProgramCache]: Analyzing trace with hash 131640819, now seen corresponding path program 1 times [2021-05-06 08:22:49,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:49,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78672311] [2021-05-06 08:22:49,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:49,171 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:49,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1108679836] [2021-05-06 08:22:49,171 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 08:22:49,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:49,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 61 conjunts are in the unsatisfiable core [2021-05-06 08:22:49,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:49,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,614 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 36 proven. 20 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-05-06 08:22:49,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:49,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78672311] [2021-05-06 08:22:49,615 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:49,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108679836] [2021-05-06 08:22:49,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108679836] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:49,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:49,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 08:22:49,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312653150] [2021-05-06 08:22:49,615 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 08:22:49,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:49,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 08:22:49,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:22:49,616 INFO L87 Difference]: Start difference. First operand 297 states and 402 transitions. Second operand has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 08:22:50,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:50,275 INFO L93 Difference]: Finished difference Result 378 states and 518 transitions. [2021-05-06 08:22:50,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 08:22:50,275 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 86 [2021-05-06 08:22:50,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:50,277 INFO L225 Difference]: With dead ends: 378 [2021-05-06 08:22:50,277 INFO L226 Difference]: Without dead ends: 377 [2021-05-06 08:22:50,277 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 406.6ms TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2021-05-06 08:22:50,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-05-06 08:22:50,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 362. [2021-05-06 08:22:50,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 204 states have (on average 1.1813725490196079) internal successors, (241), 209 states have internal predecessors, (241), 131 states have call successors, (131), 27 states have call predecessors, (131), 26 states have return successors, (129), 125 states have call predecessors, (129), 129 states have call successors, (129) [2021-05-06 08:22:50,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 501 transitions. [2021-05-06 08:22:50,287 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 501 transitions. Word has length 86 [2021-05-06 08:22:50,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:50,287 INFO L480 AbstractCegarLoop]: Abstraction has 362 states and 501 transitions. [2021-05-06 08:22:50,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 08:22:50,288 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 501 transitions. [2021-05-06 08:22:50,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-06 08:22:50,288 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:50,289 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:50,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:50,505 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:50,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:50,505 INFO L82 PathProgramCache]: Analyzing trace with hash -983010836, now seen corresponding path program 2 times [2021-05-06 08:22:50,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:50,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245088573] [2021-05-06 08:22:50,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:50,511 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:50,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1737528622] [2021-05-06 08:22:50,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:50,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:22:50,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:50,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 85 conjunts are in the unsatisfiable core [2021-05-06 08:22:50,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:50,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:50,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:50,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:50,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:50,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:50,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:50,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:50,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:50,963 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-05-06 08:22:50,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:50,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245088573] [2021-05-06 08:22:50,963 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:50,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737528622] [2021-05-06 08:22:50,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737528622] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:50,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:50,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 08:22:50,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33394259] [2021-05-06 08:22:50,963 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 08:22:50,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:50,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 08:22:50,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:22:50,964 INFO L87 Difference]: Start difference. First operand 362 states and 501 transitions. Second operand has 17 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 08:22:51,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:51,635 INFO L93 Difference]: Finished difference Result 452 states and 625 transitions. [2021-05-06 08:22:51,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 08:22:51,636 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) Word has length 91 [2021-05-06 08:22:51,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:51,638 INFO L225 Difference]: With dead ends: 452 [2021-05-06 08:22:51,638 INFO L226 Difference]: Without dead ends: 451 [2021-05-06 08:22:51,638 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 305.0ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-05-06 08:22:51,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-05-06 08:22:51,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 431. [2021-05-06 08:22:51,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 241 states have (on average 1.1908713692946058) internal successors, (287), 246 states have internal predecessors, (287), 159 states have call successors, (159), 31 states have call predecessors, (159), 30 states have return successors, (157), 153 states have call predecessors, (157), 157 states have call successors, (157) [2021-05-06 08:22:51,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 603 transitions. [2021-05-06 08:22:51,649 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 603 transitions. Word has length 91 [2021-05-06 08:22:51,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:51,650 INFO L480 AbstractCegarLoop]: Abstraction has 431 states and 603 transitions. [2021-05-06 08:22:51,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 08:22:51,650 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 603 transitions. [2021-05-06 08:22:51,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-05-06 08:22:51,651 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:51,651 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:51,864 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-06 08:22:51,865 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:51,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:51,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1005767165, now seen corresponding path program 2 times [2021-05-06 08:22:51,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:51,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623147850] [2021-05-06 08:22:51,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:51,871 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:51,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [381457503] [2021-05-06 08:22:51,871 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 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 08:22:51,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:22:51,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:51,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-06 08:22:51,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:51,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:51,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:51,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:51,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:51,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:51,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:51,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,134 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 25 proven. 22 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-05-06 08:22:52,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:52,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623147850] [2021-05-06 08:22:52,134 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:52,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381457503] [2021-05-06 08:22:52,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381457503] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:52,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:52,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:22:52,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114829330] [2021-05-06 08:22:52,135 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:22:52,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:52,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:22:52,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:22:52,135 INFO L87 Difference]: Start difference. First operand 431 states and 603 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-06 08:22:52,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:52,418 INFO L93 Difference]: Finished difference Result 468 states and 658 transitions. [2021-05-06 08:22:52,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:22:52,418 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 96 [2021-05-06 08:22:52,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:52,420 INFO L225 Difference]: With dead ends: 468 [2021-05-06 08:22:52,420 INFO L226 Difference]: Without dead ends: 468 [2021-05-06 08:22:52,420 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 123.9ms TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-05-06 08:22:52,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-05-06 08:22:52,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 452. [2021-05-06 08:22:52,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 249 states have (on average 1.1927710843373494) internal successors, (297), 255 states have internal predecessors, (297), 171 states have call successors, (171), 32 states have call predecessors, (171), 31 states have return successors, (169), 164 states have call predecessors, (169), 169 states have call successors, (169) [2021-05-06 08:22:52,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 637 transitions. [2021-05-06 08:22:52,433 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 637 transitions. Word has length 96 [2021-05-06 08:22:52,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:52,434 INFO L480 AbstractCegarLoop]: Abstraction has 452 states and 637 transitions. [2021-05-06 08:22:52,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-06 08:22:52,434 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 637 transitions. [2021-05-06 08:22:52,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-05-06 08:22:52,435 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:52,435 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 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, 1, 1] [2021-05-06 08:22:52,648 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-06 08:22:52,649 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:52,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:52,649 INFO L82 PathProgramCache]: Analyzing trace with hash 561452732, now seen corresponding path program 2 times [2021-05-06 08:22:52,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:52,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986669804] [2021-05-06 08:22:52,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:52,654 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:52,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [817122864] [2021-05-06 08:22:52,654 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 08:22:52,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:22:52,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:52,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 08:22:52,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:52,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,916 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 28 proven. 23 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-05-06 08:22:52,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:52,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986669804] [2021-05-06 08:22:52,916 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:52,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817122864] [2021-05-06 08:22:52,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817122864] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:52,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:52,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:22:52,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804261505] [2021-05-06 08:22:52,917 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:22:52,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:52,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:22:52,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:22:52,917 INFO L87 Difference]: Start difference. First operand 452 states and 637 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-06 08:22:53,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:53,260 INFO L93 Difference]: Finished difference Result 533 states and 758 transitions. [2021-05-06 08:22:53,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 08:22:53,260 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 101 [2021-05-06 08:22:53,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:53,262 INFO L225 Difference]: With dead ends: 533 [2021-05-06 08:22:53,262 INFO L226 Difference]: Without dead ends: 533 [2021-05-06 08:22:53,263 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 169.2ms TimeCoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2021-05-06 08:22:53,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-05-06 08:22:53,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 473. [2021-05-06 08:22:53,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 257 states have (on average 1.1945525291828794) internal successors, (307), 264 states have internal predecessors, (307), 183 states have call successors, (183), 33 states have call predecessors, (183), 32 states have return successors, (181), 175 states have call predecessors, (181), 181 states have call successors, (181) [2021-05-06 08:22:53,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 671 transitions. [2021-05-06 08:22:53,274 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 671 transitions. Word has length 101 [2021-05-06 08:22:53,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:53,274 INFO L480 AbstractCegarLoop]: Abstraction has 473 states and 671 transitions. [2021-05-06 08:22:53,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-06 08:22:53,274 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 671 transitions. [2021-05-06 08:22:53,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 08:22:53,275 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:53,275 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:53,482 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:53,482 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:53,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:53,482 INFO L82 PathProgramCache]: Analyzing trace with hash 132172733, now seen corresponding path program 1 times [2021-05-06 08:22:53,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:53,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588445598] [2021-05-06 08:22:53,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:53,488 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:53,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1145683266] [2021-05-06 08:22:53,488 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 08:22:53,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:53,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:22:53,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:53,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:53,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:53,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:53,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:53,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:53,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:53,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:53,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:53,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:53,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:53,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:53,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:53,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:53,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:53,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:53,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:53,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:53,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:53,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:53,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:53,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:53,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:53,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:53,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:53,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:53,764 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 28 proven. 18 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2021-05-06 08:22:53,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:53,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588445598] [2021-05-06 08:22:53,764 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:53,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145683266] [2021-05-06 08:22:53,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145683266] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:53,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:53,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:22:53,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024584326] [2021-05-06 08:22:53,765 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:22:53,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:53,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:22:53,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:22:53,766 INFO L87 Difference]: Start difference. First operand 473 states and 671 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-05-06 08:22:54,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:54,036 INFO L93 Difference]: Finished difference Result 557 states and 809 transitions. [2021-05-06 08:22:54,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 08:22:54,037 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 104 [2021-05-06 08:22:54,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:54,039 INFO L225 Difference]: With dead ends: 557 [2021-05-06 08:22:54,039 INFO L226 Difference]: Without dead ends: 557 [2021-05-06 08:22:54,039 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 119.3ms TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-05-06 08:22:54,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-05-06 08:22:54,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 527. [2021-05-06 08:22:54,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 270 states have (on average 1.1851851851851851) internal successors, (320), 287 states have internal predecessors, (320), 223 states have call successors, (223), 34 states have call predecessors, (223), 33 states have return successors, (221), 205 states have call predecessors, (221), 221 states have call successors, (221) [2021-05-06 08:22:54,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 764 transitions. [2021-05-06 08:22:54,051 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 764 transitions. Word has length 104 [2021-05-06 08:22:54,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:54,051 INFO L480 AbstractCegarLoop]: Abstraction has 527 states and 764 transitions. [2021-05-06 08:22:54,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-05-06 08:22:54,051 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 764 transitions. [2021-05-06 08:22:54,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-06 08:22:54,052 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:54,052 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 5, 4, 4, 4, 3, 3, 3, 3, 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] [2021-05-06 08:22:54,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-06 08:22:54,273 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:54,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:54,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1063397065, now seen corresponding path program 5 times [2021-05-06 08:22:54,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:54,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690510891] [2021-05-06 08:22:54,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:54,283 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:54,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [750714321] [2021-05-06 08:22:54,283 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 08:22:54,394 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-06 08:22:54,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:54,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 64 conjunts are in the unsatisfiable core [2021-05-06 08:22:54,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:54,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,748 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 40 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-05-06 08:22:54,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:54,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690510891] [2021-05-06 08:22:54,748 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:54,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750714321] [2021-05-06 08:22:54,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750714321] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:54,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:54,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 08:22:54,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121425191] [2021-05-06 08:22:54,749 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 08:22:54,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:54,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 08:22:54,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:22:54,751 INFO L87 Difference]: Start difference. First operand 527 states and 764 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 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 08:22:55,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:55,423 INFO L93 Difference]: Finished difference Result 606 states and 868 transitions. [2021-05-06 08:22:55,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 08:22:55,424 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 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 102 [2021-05-06 08:22:55,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:55,426 INFO L225 Difference]: With dead ends: 606 [2021-05-06 08:22:55,426 INFO L226 Difference]: Without dead ends: 606 [2021-05-06 08:22:55,426 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 409.2ms TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-05-06 08:22:55,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-05-06 08:22:55,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 535. [2021-05-06 08:22:55,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 276 states have (on average 1.181159420289855) internal successors, (326), 293 states have internal predecessors, (326), 223 states have call successors, (223), 36 states have call predecessors, (223), 35 states have return successors, (221), 205 states have call predecessors, (221), 221 states have call successors, (221) [2021-05-06 08:22:55,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 770 transitions. [2021-05-06 08:22:55,441 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 770 transitions. Word has length 102 [2021-05-06 08:22:55,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:55,441 INFO L480 AbstractCegarLoop]: Abstraction has 535 states and 770 transitions. [2021-05-06 08:22:55,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 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 08:22:55,441 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 770 transitions. [2021-05-06 08:22:55,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-05-06 08:22:55,442 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:55,442 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:55,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:55,657 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:55,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:55,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1716502634, now seen corresponding path program 3 times [2021-05-06 08:22:55,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:55,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901442273] [2021-05-06 08:22:55,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:55,663 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:55,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1361728548] [2021-05-06 08:22:55,663 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 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 08:22:55,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:22:55,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:55,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-06 08:22:55,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:55,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,974 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 58 proven. 5 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2021-05-06 08:22:55,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:55,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901442273] [2021-05-06 08:22:55,974 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:55,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361728548] [2021-05-06 08:22:55,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361728548] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:55,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:55,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:22:55,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674443734] [2021-05-06 08:22:55,975 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:22:55,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:55,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:22:55,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:22:55,976 INFO L87 Difference]: Start difference. First operand 535 states and 770 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-05-06 08:22:56,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:56,303 INFO L93 Difference]: Finished difference Result 609 states and 875 transitions. [2021-05-06 08:22:56,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:22:56,303 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 108 [2021-05-06 08:22:56,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:56,306 INFO L225 Difference]: With dead ends: 609 [2021-05-06 08:22:56,306 INFO L226 Difference]: Without dead ends: 608 [2021-05-06 08:22:56,306 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 180.9ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:22:56,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-05-06 08:22:56,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 596. [2021-05-06 08:22:56,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 307 states have (on average 1.1824104234527688) internal successors, (363), 327 states have internal predecessors, (363), 250 states have call successors, (250), 39 states have call predecessors, (250), 38 states have return successors, (248), 229 states have call predecessors, (248), 248 states have call successors, (248) [2021-05-06 08:22:56,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 861 transitions. [2021-05-06 08:22:56,319 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 861 transitions. Word has length 108 [2021-05-06 08:22:56,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:56,320 INFO L480 AbstractCegarLoop]: Abstraction has 596 states and 861 transitions. [2021-05-06 08:22:56,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-05-06 08:22:56,320 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 861 transitions. [2021-05-06 08:22:56,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-06 08:22:56,322 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:56,322 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2021-05-06 08:22:56,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-06 08:22:56,525 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:56,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:56,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1501596464, now seen corresponding path program 6 times [2021-05-06 08:22:56,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:56,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829448257] [2021-05-06 08:22:56,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:56,532 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:56,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [31090046] [2021-05-06 08:22:56,532 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 08:22:56,605 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-06 08:22:56,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:56,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 58 conjunts are in the unsatisfiable core [2021-05-06 08:22:56,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:56,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,857 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 91 proven. 35 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-05-06 08:22:56,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:56,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829448257] [2021-05-06 08:22:56,858 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:56,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31090046] [2021-05-06 08:22:56,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31090046] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:56,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:56,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:22:56,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711596753] [2021-05-06 08:22:56,859 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:22:56,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:56,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:22:56,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:22:56,860 INFO L87 Difference]: Start difference. First operand 596 states and 861 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 08:22:57,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:57,742 INFO L93 Difference]: Finished difference Result 616 states and 881 transitions. [2021-05-06 08:22:57,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:22:57,745 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) Word has length 107 [2021-05-06 08:22:57,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:57,748 INFO L225 Difference]: With dead ends: 616 [2021-05-06 08:22:57,748 INFO L226 Difference]: Without dead ends: 616 [2021-05-06 08:22:57,748 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 167.0ms TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:22:57,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-05-06 08:22:57,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 609. [2021-05-06 08:22:57,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 316 states have (on average 1.1772151898734178) internal successors, (372), 337 states have internal predecessors, (372), 252 states have call successors, (252), 41 states have call predecessors, (252), 40 states have return successors, (250), 230 states have call predecessors, (250), 250 states have call successors, (250) [2021-05-06 08:22:57,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 874 transitions. [2021-05-06 08:22:57,763 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 874 transitions. Word has length 107 [2021-05-06 08:22:57,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:57,763 INFO L480 AbstractCegarLoop]: Abstraction has 609 states and 874 transitions. [2021-05-06 08:22:57,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 08:22:57,763 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 874 transitions. [2021-05-06 08:22:57,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-05-06 08:22:57,764 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:57,764 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:57,982 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-06 08:22:57,982 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:57,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:57,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1112008279, now seen corresponding path program 4 times [2021-05-06 08:22:57,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:57,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350719127] [2021-05-06 08:22:57,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:57,988 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:57,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1035388744] [2021-05-06 08:22:57,988 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 08:22:58,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:22:58,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:58,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 80 conjunts are in the unsatisfiable core [2021-05-06 08:22:58,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:58,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:58,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:58,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:58,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:58,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:58,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:58,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:58,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:58,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:58,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:58,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:58,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:58,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:58,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:58,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:58,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:58,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:58,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:58,723 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-05-06 08:22:58,894 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-06 08:22:59,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,417 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 95 proven. 61 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2021-05-06 08:22:59,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:59,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350719127] [2021-05-06 08:22:59,417 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:59,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035388744] [2021-05-06 08:22:59,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035388744] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:59,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:59,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-06 08:22:59,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891353296] [2021-05-06 08:22:59,417 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-06 08:22:59,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:59,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-06 08:22:59,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-05-06 08:22:59,418 INFO L87 Difference]: Start difference. First operand 609 states and 874 transitions. Second operand has 21 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-06 08:23:00,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:00,290 INFO L93 Difference]: Finished difference Result 655 states and 935 transitions. [2021-05-06 08:23:00,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 08:23:00,291 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) Word has length 111 [2021-05-06 08:23:00,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:00,292 INFO L225 Difference]: With dead ends: 655 [2021-05-06 08:23:00,292 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 08:23:00,292 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1193.8ms TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-05-06 08:23:00,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 08:23:00,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 08:23:00,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 08:23:00,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 08:23:00,292 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 111 [2021-05-06 08:23:00,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:00,292 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 08:23:00,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-06 08:23:00,293 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 08:23:00,293 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 08:23:00,493 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-06 08:23:00,496 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:23:00 BasicIcfg [2021-05-06 08:23:00,497 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 08:23:00,497 INFO L168 Benchmark]: Toolchain (without parser) took 23254.89 ms. Allocated memory was 199.2 MB in the beginning and 459.3 MB in the end (delta: 260.0 MB). Free memory was 164.7 MB in the beginning and 349.6 MB in the end (delta: -185.0 MB). Peak memory consumption was 76.0 MB. Max. memory is 8.0 GB. [2021-05-06 08:23:00,497 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 199.2 MB. Free memory is still 181.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 08:23:00,497 INFO L168 Benchmark]: CACSL2BoogieTranslator took 229.84 ms. Allocated memory is still 199.2 MB. Free memory was 164.5 MB in the beginning and 181.9 MB in the end (delta: -17.3 MB). Peak memory consumption was 13.1 MB. Max. memory is 8.0 GB. [2021-05-06 08:23:00,497 INFO L168 Benchmark]: Boogie Preprocessor took 47.60 ms. Allocated memory is still 199.2 MB. Free memory was 181.9 MB in the beginning and 180.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 08:23:00,497 INFO L168 Benchmark]: RCFGBuilder took 340.92 ms. Allocated memory is still 199.2 MB. Free memory was 180.3 MB in the beginning and 163.5 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-06 08:23:00,497 INFO L168 Benchmark]: IcfgTransformer took 13.47 ms. Allocated memory is still 199.2 MB. Free memory was 163.0 MB in the beginning and 162.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 08:23:00,497 INFO L168 Benchmark]: TraceAbstraction took 22618.87 ms. Allocated memory was 199.2 MB in the beginning and 459.3 MB in the end (delta: 260.0 MB). Free memory was 161.4 MB in the beginning and 349.6 MB in the end (delta: -188.2 MB). Peak memory consumption was 72.4 MB. Max. memory is 8.0 GB. [2021-05-06 08:23:00,498 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 199.2 MB. Free memory is still 181.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 229.84 ms. Allocated memory is still 199.2 MB. Free memory was 164.5 MB in the beginning and 181.9 MB in the end (delta: -17.3 MB). Peak memory consumption was 13.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 47.60 ms. Allocated memory is still 199.2 MB. Free memory was 181.9 MB in the beginning and 180.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 340.92 ms. Allocated memory is still 199.2 MB. Free memory was 180.3 MB in the beginning and 163.5 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * IcfgTransformer took 13.47 ms. Allocated memory is still 199.2 MB. Free memory was 163.0 MB in the beginning and 162.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 22618.87 ms. Allocated memory was 199.2 MB in the beginning and 459.3 MB in the end (delta: 260.0 MB). Free memory was 161.4 MB in the beginning and 349.6 MB in the end (delta: -188.2 MB). Peak memory consumption was 72.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 22581.2ms, OverallIterations: 28, TraceHistogramMax: 13, EmptinessCheckTime: 29.4ms, AutomataDifference: 8134.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1423 SDtfs, 1261 SDslu, 7892 SDs, 0 SdLazy, 7374 SolverSat, 1145 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5094.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2086 GetRequests, 1697 SyntacticMatches, 8 SemanticMatches, 381 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 4604.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=609occurred in iteration=27, InterpolantAutomatonStates: 311, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 293.7ms AutomataMinimizationTime, 28 MinimizatonAttempts, 596 StatesRemovedByMinimization, 25 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 202.1ms SsaConstructionTime, 745.4ms SatisfiabilityAnalysisTime, 6383.8ms InterpolantComputationTime, 1967 NumberOfCodeBlocks, 1833 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 1939 ConstructedInterpolants, 0 QuantifiedInterpolants, 9996 SizeOfPredicates, 169 NumberOfNonLiveVariables, 5825 ConjunctsInSsa, 812 ConjunctsInUnsatCore, 28 InterpolantComputations, 7 PerfectInterpolantSequences, 3082/3439 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...