/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/egcd-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:12:31,826 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:12:31,829 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:12:31,871 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 08:12:31,894 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:12:31,896 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:12:31,897 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:12:31,899 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:12:31,902 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:12:31,903 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:12:31,906 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:12:31,911 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:12:31,913 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:12:31,914 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:12:31,915 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:12:31,917 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:12:31,923 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 08:12:31,934 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:12:31,934 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:12:31,935 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:12:31,936 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:12:31,953 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:12:31,954 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:12:31,956 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:12:31,957 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:12:31,957 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:12:31,957 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:12:31,957 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:12:31,957 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:12:31,957 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:12:31,958 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:12:31,958 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:12:31,959 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:12:31,959 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:12:31,959 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:12:31,959 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:12:31,959 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:12:31,960 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:12:31,960 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:12:31,960 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:12:31,960 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:12:31,960 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:12:31,962 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:12:31,962 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:12:32,304 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:12:32,333 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:12:32,336 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:12:32,337 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:12:32,339 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:12:32,339 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound20.c [2021-05-06 08:12:32,413 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d6bb9ac2/19c1f2b49eba4724a74187be236723df/FLAG1e4cff28e [2021-05-06 08:12:32,917 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:12:32,918 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound20.c [2021-05-06 08:12:32,925 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d6bb9ac2/19c1f2b49eba4724a74187be236723df/FLAG1e4cff28e [2021-05-06 08:12:33,301 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d6bb9ac2/19c1f2b49eba4724a74187be236723df [2021-05-06 08:12:33,304 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:12:33,305 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:12:33,311 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:12:33,311 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:12:33,315 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:12:33,316 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:12:33" (1/1) ... [2021-05-06 08:12:33,317 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f376bb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:12:33, skipping insertion in model container [2021-05-06 08:12:33,317 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:12:33" (1/1) ... [2021-05-06 08:12:33,324 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:12:33,347 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:12:33,454 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/egcd-ll_valuebound20.c[489,502] [2021-05-06 08:12:33,473 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:12:33,483 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:12:33,496 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/egcd-ll_valuebound20.c[489,502] [2021-05-06 08:12:33,515 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:12:33,527 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:12:33,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:12:33 WrapperNode [2021-05-06 08:12:33,527 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:12:33,528 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:12:33,529 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:12:33,530 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:12:33,582 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:12:33" (1/1) ... [2021-05-06 08:12:33,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:12:33" (1/1) ... [2021-05-06 08:12:33,588 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:12:33" (1/1) ... [2021-05-06 08:12:33,589 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:12:33" (1/1) ... [2021-05-06 08:12:33,605 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:12:33" (1/1) ... [2021-05-06 08:12:33,609 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:12:33" (1/1) ... [2021-05-06 08:12:33,616 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:12:33" (1/1) ... [2021-05-06 08:12:33,618 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:12:33,619 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:12:33,619 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:12:33,619 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:12:33,620 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:12:33" (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 08:12:33,694 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:12:33,694 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:12:33,694 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:12:33,694 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:12:33,695 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:12:33,695 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:12:33,695 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:12:33,695 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:12:33,695 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:12:33,696 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:12:33,696 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 08:12:33,696 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:12:33,697 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:12:33,697 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:12:33,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:12:33,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:12:33,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:12:33,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:12:33,698 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:12:33,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:12:34,035 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:12:34,036 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 08:12:34,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:12:34 BoogieIcfgContainer [2021-05-06 08:12:34,039 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:12:34,040 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:12:34,041 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:12:34,041 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:12:34,044 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:12:34" (1/1) ... [2021-05-06 08:12:34,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:12:34 BasicIcfg [2021-05-06 08:12:34,063 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:12:34,067 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:12:34,067 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:12:34,070 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:12:34,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:12:33" (1/4) ... [2021-05-06 08:12:34,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@503cf185 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:12:34, skipping insertion in model container [2021-05-06 08:12:34,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:12:33" (2/4) ... [2021-05-06 08:12:34,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@503cf185 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:12:34, skipping insertion in model container [2021-05-06 08:12:34,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:12:34" (3/4) ... [2021-05-06 08:12:34,074 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@503cf185 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:12:34, skipping insertion in model container [2021-05-06 08:12:34,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:12:34" (4/4) ... [2021-05-06 08:12:34,075 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_valuebound20.cJordan [2021-05-06 08:12:34,080 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:12:34,083 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:12:34,098 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:12:34,121 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:12:34,121 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:12:34,121 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:12:34,121 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:12:34,121 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:12:34,121 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:12:34,122 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:12:34,122 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:12:34,137 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 08:12:34,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 08:12:34,144 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:34,145 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 08:12:34,145 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:34,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:34,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1381881312, now seen corresponding path program 1 times [2021-05-06 08:12:34,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:34,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674528816] [2021-05-06 08:12:34,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:34,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:34,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:12:34,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:34,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:12:34,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:34,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 08:12:34,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:34,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 08:12:34,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:34,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-06 08:12:34,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:34,415 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 08:12:34,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:34,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674528816] [2021-05-06 08:12:34,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674528816] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:12:34,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:12:34,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 08:12:34,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572520174] [2021-05-06 08:12:34,422 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 08:12:34,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:34,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 08:12:34,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:12:34,441 INFO L87 Difference]: Start difference. First operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) 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 08:12:34,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:34,598 INFO L93 Difference]: Finished difference Result 37 states and 47 transitions. [2021-05-06 08:12:34,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 08:12:34,600 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 08:12:34,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:34,606 INFO L225 Difference]: With dead ends: 37 [2021-05-06 08:12:34,606 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 08:12:34,607 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 53.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:12:34,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 08:12:34,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-06 08:12:34,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 08:12:34,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-06 08:12:34,642 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 33 [2021-05-06 08:12:34,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:34,643 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-06 08:12:34,643 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 08:12:34,643 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-06 08:12:34,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 08:12:34,645 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:34,645 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 08:12:34,645 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 08:12:34,645 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:34,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:34,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1975235811, now seen corresponding path program 1 times [2021-05-06 08:12:34,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:34,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466243636] [2021-05-06 08:12:34,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:34,665 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:34,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1237492002] [2021-05-06 08:12:34,665 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 08:12:34,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:34,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:12:34,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:34,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:34,884 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 08:12:34,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:34,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466243636] [2021-05-06 08:12:34,885 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:34,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237492002] [2021-05-06 08:12:34,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237492002] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:12:34,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:12:34,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:12:34,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809433809] [2021-05-06 08:12:34,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:12:34,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:34,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:12:34,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:12:34,888 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 08:12:34,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:34,956 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2021-05-06 08:12:34,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:12:34,956 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 33 [2021-05-06 08:12:34,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:34,958 INFO L225 Difference]: With dead ends: 46 [2021-05-06 08:12:34,958 INFO L226 Difference]: Without dead ends: 46 [2021-05-06 08:12:34,958 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:12:34,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-06 08:12:34,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-05-06 08:12:34,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 23 states have internal predecessors, (26), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 08:12:34,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2021-05-06 08:12:34,970 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 33 [2021-05-06 08:12:34,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:34,970 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2021-05-06 08:12:34,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 08:12:34,970 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2021-05-06 08:12:34,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 08:12:34,971 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:34,971 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] [2021-05-06 08:12:35,198 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 08:12:35,198 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:35,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:35,199 INFO L82 PathProgramCache]: Analyzing trace with hash -759782395, now seen corresponding path program 1 times [2021-05-06 08:12:35,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:35,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941897951] [2021-05-06 08:12:35,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:35,214 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:35,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [600406926] [2021-05-06 08:12:35,214 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 08:12:35,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:35,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:12:35,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:35,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:35,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:35,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:35,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:35,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:35,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:35,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:35,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:35,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:35,566 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:12:35,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:35,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941897951] [2021-05-06 08:12:35,567 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:35,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600406926] [2021-05-06 08:12:35,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600406926] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:35,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:35,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:12:35,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998592130] [2021-05-06 08:12:35,568 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:12:35,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:35,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:12:35,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:12:35,571 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 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 08:12:35,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:35,742 INFO L93 Difference]: Finished difference Result 68 states and 100 transitions. [2021-05-06 08:12:35,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:12:35,744 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 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 38 [2021-05-06 08:12:35,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:35,750 INFO L225 Difference]: With dead ends: 68 [2021-05-06 08:12:35,751 INFO L226 Difference]: Without dead ends: 68 [2021-05-06 08:12:35,751 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 100.5ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:12:35,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-06 08:12:35,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2021-05-06 08:12:35,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 30 states have (on average 1.3) internal successors, (39), 32 states have internal predecessors, (39), 25 states have call successors, (25), 6 states have call predecessors, (25), 5 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-06 08:12:35,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 87 transitions. [2021-05-06 08:12:35,775 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 87 transitions. Word has length 38 [2021-05-06 08:12:35,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:35,775 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 87 transitions. [2021-05-06 08:12:35,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 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 08:12:35,776 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 87 transitions. [2021-05-06 08:12:35,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 08:12:35,777 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:35,777 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] [2021-05-06 08:12:35,983 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:35,983 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:35,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:35,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1840397536, now seen corresponding path program 1 times [2021-05-06 08:12:35,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:35,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361258969] [2021-05-06 08:12:35,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:35,998 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:35,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [284557976] [2021-05-06 08:12:35,998 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 08:12:36,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:36,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:12:36,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:36,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,315 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 08:12:36,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:36,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361258969] [2021-05-06 08:12:36,316 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:36,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284557976] [2021-05-06 08:12:36,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284557976] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:36,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:36,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:12:36,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437597299] [2021-05-06 08:12:36,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:12:36,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:36,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:12:36,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:12:36,322 INFO L87 Difference]: Start difference. First operand 61 states and 87 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-06 08:12:36,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:36,486 INFO L93 Difference]: Finished difference Result 66 states and 91 transitions. [2021-05-06 08:12:36,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:12:36,487 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 43 [2021-05-06 08:12:36,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:36,488 INFO L225 Difference]: With dead ends: 66 [2021-05-06 08:12:36,488 INFO L226 Difference]: Without dead ends: 64 [2021-05-06 08:12:36,489 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 63.7ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:12:36,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-06 08:12:36,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-05-06 08:12:36,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 35 states have internal predecessors, (42), 24 states have call successors, (24), 7 states have call predecessors, (24), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 08:12:36,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 87 transitions. [2021-05-06 08:12:36,496 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 87 transitions. Word has length 43 [2021-05-06 08:12:36,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:36,497 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 87 transitions. [2021-05-06 08:12:36,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-06 08:12:36,497 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 87 transitions. [2021-05-06 08:12:36,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-06 08:12:36,498 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:36,498 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] [2021-05-06 08:12:36,722 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:36,722 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:36,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:36,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1590647429, now seen corresponding path program 1 times [2021-05-06 08:12:36,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:36,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336685230] [2021-05-06 08:12:36,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:36,740 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:36,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [145874405] [2021-05-06 08:12:36,741 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 08:12:36,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:36,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:12:36,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:36,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,904 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 08:12:36,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:36,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336685230] [2021-05-06 08:12:36,905 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:36,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145874405] [2021-05-06 08:12:36,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145874405] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:12:36,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:12:36,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:12:36,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180875585] [2021-05-06 08:12:36,906 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:12:36,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:36,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:12:36,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:12:36,907 INFO L87 Difference]: Start difference. First operand 64 states and 87 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-05-06 08:12:36,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:36,945 INFO L93 Difference]: Finished difference Result 68 states and 90 transitions. [2021-05-06 08:12:36,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:12:36,947 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 49 [2021-05-06 08:12:36,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:36,948 INFO L225 Difference]: With dead ends: 68 [2021-05-06 08:12:36,948 INFO L226 Difference]: Without dead ends: 68 [2021-05-06 08:12:36,948 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:12:36,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-06 08:12:36,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-05-06 08:12:36,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 36 states have (on average 1.25) internal successors, (45), 38 states have internal predecessors, (45), 24 states have call successors, (24), 8 states have call predecessors, (24), 7 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 08:12:36,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 90 transitions. [2021-05-06 08:12:36,955 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 90 transitions. Word has length 49 [2021-05-06 08:12:36,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:36,955 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 90 transitions. [2021-05-06 08:12:36,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-05-06 08:12:36,956 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 90 transitions. [2021-05-06 08:12:36,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-06 08:12:36,957 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:36,957 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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, 1, 1, 1] [2021-05-06 08:12:37,160 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:37,161 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:37,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:37,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1766531305, now seen corresponding path program 1 times [2021-05-06 08:12:37,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:37,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215219622] [2021-05-06 08:12:37,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:37,173 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:37,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [396507981] [2021-05-06 08:12:37,173 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 08:12:37,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:37,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:12:37,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:37,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,334 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-05-06 08:12:37,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:37,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215219622] [2021-05-06 08:12:37,335 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:37,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396507981] [2021-05-06 08:12:37,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396507981] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:12:37,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:12:37,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:12:37,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881143180] [2021-05-06 08:12:37,336 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:12:37,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:37,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:12:37,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:12:37,337 INFO L87 Difference]: Start difference. First operand 68 states and 90 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 08:12:37,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:37,378 INFO L93 Difference]: Finished difference Result 82 states and 106 transitions. [2021-05-06 08:12:37,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:12:37,379 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 51 [2021-05-06 08:12:37,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:37,380 INFO L225 Difference]: With dead ends: 82 [2021-05-06 08:12:37,380 INFO L226 Difference]: Without dead ends: 82 [2021-05-06 08:12:37,380 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:12:37,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-06 08:12:37,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2021-05-06 08:12:37,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 45 states have internal predecessors, (51), 27 states have call successors, (27), 10 states have call predecessors, (27), 9 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-06 08:12:37,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2021-05-06 08:12:37,388 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 51 [2021-05-06 08:12:37,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:37,388 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2021-05-06 08:12:37,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 08:12:37,389 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2021-05-06 08:12:37,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-06 08:12:37,390 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:37,390 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1] [2021-05-06 08:12:37,607 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 08:12:37,607 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:37,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:37,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1046589490, now seen corresponding path program 1 times [2021-05-06 08:12:37,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:37,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931587989] [2021-05-06 08:12:37,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:37,619 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:37,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1457281516] [2021-05-06 08:12:37,620 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 08:12:37,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:37,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 08:12:37,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:37,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,861 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-05-06 08:12:37,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:37,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931587989] [2021-05-06 08:12:37,862 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:37,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457281516] [2021-05-06 08:12:37,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457281516] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:37,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:37,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:12:37,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81459557] [2021-05-06 08:12:37,865 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:12:37,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:37,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:12:37,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:12:37,867 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:12:38,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:38,006 INFO L93 Difference]: Finished difference Result 86 states and 110 transitions. [2021-05-06 08:12:38,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:12:38,007 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 54 [2021-05-06 08:12:38,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:38,008 INFO L225 Difference]: With dead ends: 86 [2021-05-06 08:12:38,008 INFO L226 Difference]: Without dead ends: 84 [2021-05-06 08:12:38,008 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 78.8ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:12:38,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-06 08:12:38,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-05-06 08:12:38,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 49 states have internal predecessors, (53), 27 states have call successors, (27), 11 states have call predecessors, (27), 10 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-06 08:12:38,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 105 transitions. [2021-05-06 08:12:38,021 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 105 transitions. Word has length 54 [2021-05-06 08:12:38,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:38,021 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 105 transitions. [2021-05-06 08:12:38,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:12:38,022 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 105 transitions. [2021-05-06 08:12:38,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-06 08:12:38,023 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:38,023 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 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] [2021-05-06 08:12:38,236 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:38,237 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:38,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:38,238 INFO L82 PathProgramCache]: Analyzing trace with hash -2126309122, now seen corresponding path program 1 times [2021-05-06 08:12:38,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:38,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219528501] [2021-05-06 08:12:38,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:38,249 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:38,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1104672818] [2021-05-06 08:12:38,249 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 08:12:38,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:38,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 08:12:38,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:38,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:38,480 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-06 08:12:38,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:38,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219528501] [2021-05-06 08:12:38,480 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:38,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104672818] [2021-05-06 08:12:38,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104672818] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:38,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:38,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:12:38,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6445959] [2021-05-06 08:12:38,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:12:38,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:38,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:12:38,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:12:38,482 INFO L87 Difference]: Start difference. First operand 84 states and 105 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:12:38,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:38,577 INFO L93 Difference]: Finished difference Result 116 states and 145 transitions. [2021-05-06 08:12:38,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:12:38,577 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 56 [2021-05-06 08:12:38,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:38,579 INFO L225 Difference]: With dead ends: 116 [2021-05-06 08:12:38,579 INFO L226 Difference]: Without dead ends: 116 [2021-05-06 08:12:38,579 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.6ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:12:38,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-06 08:12:38,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 112. [2021-05-06 08:12:38,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 64 states have (on average 1.15625) internal successors, (74), 67 states have internal predecessors, (74), 33 states have call successors, (33), 15 states have call predecessors, (33), 14 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 08:12:38,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 138 transitions. [2021-05-06 08:12:38,587 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 138 transitions. Word has length 56 [2021-05-06 08:12:38,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:38,588 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 138 transitions. [2021-05-06 08:12:38,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:12:38,588 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 138 transitions. [2021-05-06 08:12:38,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 08:12:38,589 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:38,589 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:12:38,806 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:38,806 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:38,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:38,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1746772058, now seen corresponding path program 2 times [2021-05-06 08:12:38,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:38,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341553003] [2021-05-06 08:12:38,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:38,819 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:38,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1935217602] [2021-05-06 08:12:38,819 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 08:12:38,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:12:38,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:12:38,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-06 08:12:38,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:38,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:38,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:38,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:38,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:38,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:39,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:39,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:39,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:39,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:39,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:39,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:39,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:39,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:39,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:39,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:39,121 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-05-06 08:12:39,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:39,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341553003] [2021-05-06 08:12:39,122 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:39,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935217602] [2021-05-06 08:12:39,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935217602] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:39,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:39,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:12:39,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711027434] [2021-05-06 08:12:39,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:12:39,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:39,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:12:39,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:12:39,123 INFO L87 Difference]: Start difference. First operand 112 states and 138 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 08:12:39,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:39,303 INFO L93 Difference]: Finished difference Result 135 states and 176 transitions. [2021-05-06 08:12:39,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:12:39,304 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 61 [2021-05-06 08:12:39,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:39,305 INFO L225 Difference]: With dead ends: 135 [2021-05-06 08:12:39,305 INFO L226 Difference]: Without dead ends: 131 [2021-05-06 08:12:39,305 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 70.0ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:12:39,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-06 08:12:39,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-05-06 08:12:39,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 73 states have (on average 1.178082191780822) internal successors, (86), 77 states have internal predecessors, (86), 42 states have call successors, (42), 16 states have call predecessors, (42), 15 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) [2021-05-06 08:12:39,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 167 transitions. [2021-05-06 08:12:39,314 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 167 transitions. Word has length 61 [2021-05-06 08:12:39,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:39,314 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 167 transitions. [2021-05-06 08:12:39,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 08:12:39,315 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 167 transitions. [2021-05-06 08:12:39,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-06 08:12:39,316 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:39,316 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:12:39,541 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-06 08:12:39,541 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:39,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:39,542 INFO L82 PathProgramCache]: Analyzing trace with hash -296466288, now seen corresponding path program 1 times [2021-05-06 08:12:39,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:39,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246659658] [2021-05-06 08:12:39,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:39,554 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:39,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1664352372] [2021-05-06 08:12:39,554 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 08:12:39,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:39,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:12:39,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:39,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:39,801 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-05-06 08:12:39,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:39,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246659658] [2021-05-06 08:12:39,802 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:39,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664352372] [2021-05-06 08:12:39,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664352372] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:39,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:39,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:12:39,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099832515] [2021-05-06 08:12:39,804 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:12:39,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:39,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:12:39,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:12:39,804 INFO L87 Difference]: Start difference. First operand 131 states and 167 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 08:12:39,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:39,910 INFO L93 Difference]: Finished difference Result 149 states and 191 transitions. [2021-05-06 08:12:39,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:12:39,911 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 69 [2021-05-06 08:12:39,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:39,912 INFO L225 Difference]: With dead ends: 149 [2021-05-06 08:12:39,912 INFO L226 Difference]: Without dead ends: 149 [2021-05-06 08:12:39,913 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.9ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:12:39,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-06 08:12:39,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 147. [2021-05-06 08:12:39,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 81 states have (on average 1.1728395061728396) internal successors, (95), 86 states have internal predecessors, (95), 48 states have call successors, (48), 18 states have call predecessors, (48), 17 states have return successors, (45), 42 states have call predecessors, (45), 45 states have call successors, (45) [2021-05-06 08:12:39,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 188 transitions. [2021-05-06 08:12:39,921 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 188 transitions. Word has length 69 [2021-05-06 08:12:39,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:39,921 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 188 transitions. [2021-05-06 08:12:39,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 08:12:39,921 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 188 transitions. [2021-05-06 08:12:39,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-06 08:12:39,922 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:39,922 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:12:40,127 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:40,128 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:40,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:40,128 INFO L82 PathProgramCache]: Analyzing trace with hash -392102192, now seen corresponding path program 2 times [2021-05-06 08:12:40,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:40,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681668443] [2021-05-06 08:12:40,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:40,137 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:40,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1187185766] [2021-05-06 08:12:40,138 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 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 08:12:40,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:12:40,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:12:40,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:12:40,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:40,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,415 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-05-06 08:12:40,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:40,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681668443] [2021-05-06 08:12:40,415 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:40,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187185766] [2021-05-06 08:12:40,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187185766] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:40,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:40,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:12:40,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343311608] [2021-05-06 08:12:40,416 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:12:40,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:40,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:12:40,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:12:40,417 INFO L87 Difference]: Start difference. First operand 147 states and 188 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 08:12:40,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:40,514 INFO L93 Difference]: Finished difference Result 164 states and 210 transitions. [2021-05-06 08:12:40,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:12:40,515 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 69 [2021-05-06 08:12:40,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:40,516 INFO L225 Difference]: With dead ends: 164 [2021-05-06 08:12:40,516 INFO L226 Difference]: Without dead ends: 161 [2021-05-06 08:12:40,517 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 64.4ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:12:40,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-05-06 08:12:40,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2021-05-06 08:12:40,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 89 states have (on average 1.1573033707865168) internal successors, (103), 94 states have internal predecessors, (103), 51 states have call successors, (51), 20 states have call predecessors, (51), 19 states have return successors, (48), 45 states have call predecessors, (48), 48 states have call successors, (48) [2021-05-06 08:12:40,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 202 transitions. [2021-05-06 08:12:40,524 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 202 transitions. Word has length 69 [2021-05-06 08:12:40,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:40,524 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 202 transitions. [2021-05-06 08:12:40,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 08:12:40,524 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 202 transitions. [2021-05-06 08:12:40,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-06 08:12:40,525 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:40,526 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:12:40,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:40,741 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:40,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:40,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1674813879, now seen corresponding path program 2 times [2021-05-06 08:12:40,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:40,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355191297] [2021-05-06 08:12:40,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:40,751 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:40,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [110950242] [2021-05-06 08:12:40,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:40,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:12:40,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:12:40,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-06 08:12:40,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:40,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:41,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:41,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:41,284 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-05-06 08:12:41,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:41,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:41,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:41,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:41,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:41,359 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 34 proven. 19 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-05-06 08:12:41,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:41,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355191297] [2021-05-06 08:12:41,359 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:41,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110950242] [2021-05-06 08:12:41,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110950242] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:41,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:41,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:12:41,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735517476] [2021-05-06 08:12:41,360 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:12:41,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:41,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:12:41,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:12:41,371 INFO L87 Difference]: Start difference. First operand 160 states and 202 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 08:12:42,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:42,193 INFO L93 Difference]: Finished difference Result 188 states and 239 transitions. [2021-05-06 08:12:42,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:12:42,193 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 74 [2021-05-06 08:12:42,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:42,195 INFO L225 Difference]: With dead ends: 188 [2021-05-06 08:12:42,195 INFO L226 Difference]: Without dead ends: 188 [2021-05-06 08:12:42,195 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 306.8ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:12:42,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-05-06 08:12:42,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 184. [2021-05-06 08:12:42,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 104 states have (on average 1.1634615384615385) internal successors, (121), 109 states have internal predecessors, (121), 57 states have call successors, (57), 23 states have call predecessors, (57), 22 states have return successors, (54), 51 states have call predecessors, (54), 54 states have call successors, (54) [2021-05-06 08:12:42,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 232 transitions. [2021-05-06 08:12:42,203 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 232 transitions. Word has length 74 [2021-05-06 08:12:42,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:42,203 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 232 transitions. [2021-05-06 08:12:42,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 08:12:42,203 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 232 transitions. [2021-05-06 08:12:42,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-06 08:12:42,204 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:42,204 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:12:42,421 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 08:12:42,421 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:42,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:42,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1927051720, now seen corresponding path program 3 times [2021-05-06 08:12:42,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:42,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989501893] [2021-05-06 08:12:42,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:42,429 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:42,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [797708785] [2021-05-06 08:12:42,429 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 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 08:12:42,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:12:42,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:12:42,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-06 08:12:42,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:42,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:42,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:42,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:42,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:42,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:42,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:42,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:42,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:42,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:42,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:42,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:42,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:42,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:42,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:42,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:42,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:42,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:42,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:42,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:42,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:42,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:42,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:42,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:42,986 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 28 proven. 16 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-05-06 08:12:42,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:42,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989501893] [2021-05-06 08:12:42,986 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:42,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797708785] [2021-05-06 08:12:42,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797708785] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:42,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:42,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:12:42,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029114650] [2021-05-06 08:12:42,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:12:42,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:42,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:12:42,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:12:42,988 INFO L87 Difference]: Start difference. First operand 184 states and 232 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 08:12:43,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:43,579 INFO L93 Difference]: Finished difference Result 211 states and 264 transitions. [2021-05-06 08:12:43,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:12:43,579 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 74 [2021-05-06 08:12:43,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:43,582 INFO L225 Difference]: With dead ends: 211 [2021-05-06 08:12:43,582 INFO L226 Difference]: Without dead ends: 211 [2021-05-06 08:12:43,583 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 232.1ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:12:43,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-05-06 08:12:43,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 197. [2021-05-06 08:12:43,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 114 states have (on average 1.1578947368421053) internal successors, (132), 119 states have internal predecessors, (132), 57 states have call successors, (57), 26 states have call predecessors, (57), 25 states have return successors, (54), 51 states have call predecessors, (54), 54 states have call successors, (54) [2021-05-06 08:12:43,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 243 transitions. [2021-05-06 08:12:43,591 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 243 transitions. Word has length 74 [2021-05-06 08:12:43,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:43,591 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 243 transitions. [2021-05-06 08:12:43,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 08:12:43,591 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 243 transitions. [2021-05-06 08:12:43,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 08:12:43,592 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:43,592 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 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] [2021-05-06 08:12:43,808 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 08:12:43,809 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:43,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:43,809 INFO L82 PathProgramCache]: Analyzing trace with hash 504849037, now seen corresponding path program 4 times [2021-05-06 08:12:43,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:43,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087969939] [2021-05-06 08:12:43,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:43,823 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:43,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [655489858] [2021-05-06 08:12:43,823 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 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 08:12:43,895 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:12:43,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:12:43,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-06 08:12:43,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:44,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:44,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:44,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:44,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:44,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:44,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:44,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:44,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:44,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:44,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:44,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:44,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:44,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:44,212 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 35 proven. 31 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-05-06 08:12:44,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:44,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087969939] [2021-05-06 08:12:44,212 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:44,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655489858] [2021-05-06 08:12:44,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655489858] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:44,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:44,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:12:44,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515093245] [2021-05-06 08:12:44,213 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:12:44,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:44,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:12:44,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:12:44,213 INFO L87 Difference]: Start difference. First operand 197 states and 243 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 08:12:45,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:45,079 INFO L93 Difference]: Finished difference Result 217 states and 270 transitions. [2021-05-06 08:12:45,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:12:45,079 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 79 [2021-05-06 08:12:45,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:45,081 INFO L225 Difference]: With dead ends: 217 [2021-05-06 08:12:45,081 INFO L226 Difference]: Without dead ends: 212 [2021-05-06 08:12:45,081 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 159.2ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:12:45,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-05-06 08:12:45,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 175. [2021-05-06 08:12:45,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 103 states have (on average 1.145631067961165) internal successors, (118), 107 states have internal predecessors, (118), 48 states have call successors, (48), 24 states have call predecessors, (48), 23 states have return successors, (45), 43 states have call predecessors, (45), 45 states have call successors, (45) [2021-05-06 08:12:45,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 211 transitions. [2021-05-06 08:12:45,088 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 211 transitions. Word has length 79 [2021-05-06 08:12:45,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:45,088 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 211 transitions. [2021-05-06 08:12:45,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 08:12:45,089 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 211 transitions. [2021-05-06 08:12:45,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 08:12:45,089 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:45,089 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 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] [2021-05-06 08:12:45,304 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 08:12:45,305 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:45,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:45,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1530341036, now seen corresponding path program 3 times [2021-05-06 08:12:45,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:45,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709550425] [2021-05-06 08:12:45,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:45,312 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:45,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1769560705] [2021-05-06 08:12:45,313 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 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 08:12:45,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:12:45,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:12:45,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-06 08:12:45,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:45,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:45,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:45,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:45,628 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-05-06 08:12:45,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:45,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709550425] [2021-05-06 08:12:45,628 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:45,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769560705] [2021-05-06 08:12:45,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769560705] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:45,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:45,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:12:45,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118009684] [2021-05-06 08:12:45,629 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:12:45,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:45,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:12:45,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:12:45,630 INFO L87 Difference]: Start difference. First operand 175 states and 211 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 08:12:47,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:47,892 INFO L93 Difference]: Finished difference Result 198 states and 249 transitions. [2021-05-06 08:12:47,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:12:47,893 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 79 [2021-05-06 08:12:47,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:47,894 INFO L225 Difference]: With dead ends: 198 [2021-05-06 08:12:47,894 INFO L226 Difference]: Without dead ends: 194 [2021-05-06 08:12:47,895 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 118.0ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:12:47,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-05-06 08:12:47,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 191. [2021-05-06 08:12:47,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 112 states have (on average 1.1607142857142858) internal successors, (130), 116 states have internal predecessors, (130), 54 states have call successors, (54), 25 states have call predecessors, (54), 24 states have return successors, (51), 49 states have call predecessors, (51), 51 states have call successors, (51) [2021-05-06 08:12:47,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 235 transitions. [2021-05-06 08:12:47,906 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 235 transitions. Word has length 79 [2021-05-06 08:12:47,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:47,907 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 235 transitions. [2021-05-06 08:12:47,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 08:12:47,907 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 235 transitions. [2021-05-06 08:12:47,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-06 08:12:47,908 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:47,908 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:12:48,109 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:48,109 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:48,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:48,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1037601673, now seen corresponding path program 5 times [2021-05-06 08:12:48,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:48,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252107989] [2021-05-06 08:12:48,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:48,117 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:48,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1663324031] [2021-05-06 08:12:48,117 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 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 08:12:48,213 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-06 08:12:48,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:12:48,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 08:12:48,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:48,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:48,378 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-05-06 08:12:48,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:48,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252107989] [2021-05-06 08:12:48,378 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:48,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663324031] [2021-05-06 08:12:48,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663324031] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:48,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:48,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:12:48,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778399883] [2021-05-06 08:12:48,379 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:12:48,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:48,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:12:48,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:12:48,379 INFO L87 Difference]: Start difference. First operand 191 states and 235 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (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 08:12:48,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:48,457 INFO L93 Difference]: Finished difference Result 221 states and 280 transitions. [2021-05-06 08:12:48,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:12:48,457 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (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 87 [2021-05-06 08:12:48,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:48,459 INFO L225 Difference]: With dead ends: 221 [2021-05-06 08:12:48,459 INFO L226 Difference]: Without dead ends: 221 [2021-05-06 08:12:48,460 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.3ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:12:48,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-05-06 08:12:48,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 208. [2021-05-06 08:12:48,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 119 states have (on average 1.1680672268907564) internal successors, (139), 124 states have internal predecessors, (139), 63 states have call successors, (63), 26 states have call predecessors, (63), 25 states have return successors, (60), 57 states have call predecessors, (60), 60 states have call successors, (60) [2021-05-06 08:12:48,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 262 transitions. [2021-05-06 08:12:48,474 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 262 transitions. Word has length 87 [2021-05-06 08:12:48,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:48,475 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 262 transitions. [2021-05-06 08:12:48,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (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 08:12:48,475 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 262 transitions. [2021-05-06 08:12:48,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-06 08:12:48,478 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:48,478 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:12:48,694 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 08:12:48,694 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:48,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:48,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1133237577, now seen corresponding path program 6 times [2021-05-06 08:12:48,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:48,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030832976] [2021-05-06 08:12:48,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:48,700 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:48,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2110664907] [2021-05-06 08:12:48,700 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 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 08:12:48,788 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-06 08:12:48,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:12:48,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 08:12:48,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:48,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:48,990 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-05-06 08:12:48,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:48,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030832976] [2021-05-06 08:12:48,991 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:48,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110664907] [2021-05-06 08:12:48,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110664907] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:48,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:48,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:12:48,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869614031] [2021-05-06 08:12:48,992 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:12:48,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:48,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:12:48,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:12:48,992 INFO L87 Difference]: Start difference. First operand 208 states and 262 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 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 08:12:49,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:49,142 INFO L93 Difference]: Finished difference Result 231 states and 294 transitions. [2021-05-06 08:12:49,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:12:49,142 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 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 87 [2021-05-06 08:12:49,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:49,144 INFO L225 Difference]: With dead ends: 231 [2021-05-06 08:12:49,144 INFO L226 Difference]: Without dead ends: 228 [2021-05-06 08:12:49,144 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 53.9ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:12:49,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-05-06 08:12:49,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 227. [2021-05-06 08:12:49,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 130 states have (on average 1.1615384615384616) internal successors, (151), 135 states have internal predecessors, (151), 69 states have call successors, (69), 28 states have call predecessors, (69), 27 states have return successors, (66), 63 states have call predecessors, (66), 66 states have call successors, (66) [2021-05-06 08:12:49,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 286 transitions. [2021-05-06 08:12:49,151 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 286 transitions. Word has length 87 [2021-05-06 08:12:49,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:49,153 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 286 transitions. [2021-05-06 08:12:49,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 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 08:12:49,154 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 286 transitions. [2021-05-06 08:12:49,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-06 08:12:49,155 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:49,156 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:12:49,377 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 08:12:49,377 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:49,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:49,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1104608426, now seen corresponding path program 7 times [2021-05-06 08:12:49,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:49,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572126150] [2021-05-06 08:12:49,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:49,385 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:49,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1278890190] [2021-05-06 08:12:49,385 INFO L93 rtionOrderModulation]: Changing assertion order to 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 08:12:49,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:49,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 08:12:49,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:49,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:49,647 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-05-06 08:12:49,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:49,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572126150] [2021-05-06 08:12:49,647 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:49,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278890190] [2021-05-06 08:12:49,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278890190] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:49,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:49,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:12:49,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652452357] [2021-05-06 08:12:49,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:12:49,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:49,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:12:49,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:12:49,650 INFO L87 Difference]: Start difference. First operand 227 states and 286 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 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 08:12:49,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:49,918 INFO L93 Difference]: Finished difference Result 241 states and 307 transitions. [2021-05-06 08:12:49,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:12:49,919 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 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 87 [2021-05-06 08:12:49,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:49,920 INFO L225 Difference]: With dead ends: 241 [2021-05-06 08:12:49,920 INFO L226 Difference]: Without dead ends: 241 [2021-05-06 08:12:49,921 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 58.1ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:12:49,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-05-06 08:12:49,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 239. [2021-05-06 08:12:49,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 135 states have (on average 1.162962962962963) internal successors, (157), 141 states have internal predecessors, (157), 75 states have call successors, (75), 29 states have call predecessors, (75), 28 states have return successors, (72), 68 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-06 08:12:49,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 304 transitions. [2021-05-06 08:12:49,931 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 304 transitions. Word has length 87 [2021-05-06 08:12:49,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:49,931 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 304 transitions. [2021-05-06 08:12:49,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 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 08:12:49,932 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 304 transitions. [2021-05-06 08:12:49,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-06 08:12:49,933 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:49,933 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:12:50,141 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 08:12:50,141 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:50,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:50,141 INFO L82 PathProgramCache]: Analyzing trace with hash -942157577, now seen corresponding path program 8 times [2021-05-06 08:12:50,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:50,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117006099] [2021-05-06 08:12:50,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:50,148 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:50,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2023286945] [2021-05-06 08:12:50,149 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 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 08:12:50,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:12:50,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:12:50,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 08:12:50,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:50,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:50,403 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-05-06 08:12:50,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:50,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117006099] [2021-05-06 08:12:50,404 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:50,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023286945] [2021-05-06 08:12:50,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023286945] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:50,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:50,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:12:50,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600675482] [2021-05-06 08:12:50,405 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:12:50,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:50,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:12:50,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:12:50,406 INFO L87 Difference]: Start difference. First operand 239 states and 304 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 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 08:12:50,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:50,546 INFO L93 Difference]: Finished difference Result 252 states and 323 transitions. [2021-05-06 08:12:50,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:12:50,547 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 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 87 [2021-05-06 08:12:50,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:50,548 INFO L225 Difference]: With dead ends: 252 [2021-05-06 08:12:50,548 INFO L226 Difference]: Without dead ends: 249 [2021-05-06 08:12:50,549 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.4ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:12:50,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-05-06 08:12:50,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 239. [2021-05-06 08:12:50,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 135 states have (on average 1.162962962962963) internal successors, (157), 141 states have internal predecessors, (157), 75 states have call successors, (75), 29 states have call predecessors, (75), 28 states have return successors, (72), 68 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-06 08:12:50,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 304 transitions. [2021-05-06 08:12:50,556 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 304 transitions. Word has length 87 [2021-05-06 08:12:50,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:50,556 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 304 transitions. [2021-05-06 08:12:50,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 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 08:12:50,557 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 304 transitions. [2021-05-06 08:12:50,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-06 08:12:50,558 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:50,558 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:12:50,758 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:50,758 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:50,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:50,759 INFO L82 PathProgramCache]: Analyzing trace with hash -913528426, now seen corresponding path program 9 times [2021-05-06 08:12:50,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:50,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48995898] [2021-05-06 08:12:50,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:50,765 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:50,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [473819032] [2021-05-06 08:12:50,766 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 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 08:12:50,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:12:50,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:12:50,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 08:12:50,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:50,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:50,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:50,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:50,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:50,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:50,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:50,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:50,995 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 49 proven. 7 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-05-06 08:12:50,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:50,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48995898] [2021-05-06 08:12:50,995 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:50,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473819032] [2021-05-06 08:12:50,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473819032] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:50,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:50,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:12:50,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399785884] [2021-05-06 08:12:50,996 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:12:50,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:50,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:12:50,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:12:50,997 INFO L87 Difference]: Start difference. First operand 239 states and 304 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, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-05-06 08:12:51,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:51,074 INFO L93 Difference]: Finished difference Result 243 states and 307 transitions. [2021-05-06 08:12:51,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:12:51,074 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, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 87 [2021-05-06 08:12:51,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:51,076 INFO L225 Difference]: With dead ends: 243 [2021-05-06 08:12:51,076 INFO L226 Difference]: Without dead ends: 240 [2021-05-06 08:12:51,076 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 35.2ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:12:51,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-05-06 08:12:51,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 237. [2021-05-06 08:12:51,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 137 states have (on average 1.145985401459854) internal successors, (157), 143 states have internal predecessors, (157), 70 states have call successors, (70), 30 states have call predecessors, (70), 29 states have return successors, (68), 63 states have call predecessors, (68), 68 states have call successors, (68) [2021-05-06 08:12:51,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 295 transitions. [2021-05-06 08:12:51,084 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 295 transitions. Word has length 87 [2021-05-06 08:12:51,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:51,085 INFO L480 AbstractCegarLoop]: Abstraction has 237 states and 295 transitions. [2021-05-06 08:12:51,085 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, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-05-06 08:12:51,085 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 295 transitions. [2021-05-06 08:12:51,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-06 08:12:51,086 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:51,086 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:12:51,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:51,313 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:51,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:51,313 INFO L82 PathProgramCache]: Analyzing trace with hash -428683728, now seen corresponding path program 3 times [2021-05-06 08:12:51,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:51,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701655559] [2021-05-06 08:12:51,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:51,320 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:51,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1217748748] [2021-05-06 08:12:51,321 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 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 08:12:51,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:12:51,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:12:51,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 08:12:51,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:51,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:51,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:51,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:51,643 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 69 proven. 14 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-05-06 08:12:51,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:51,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701655559] [2021-05-06 08:12:51,643 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:51,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217748748] [2021-05-06 08:12:51,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217748748] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:51,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:51,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:12:51,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199462363] [2021-05-06 08:12:51,644 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:12:51,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:51,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:12:51,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:12:51,645 INFO L87 Difference]: Start difference. First operand 237 states and 295 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:12:51,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:51,914 INFO L93 Difference]: Finished difference Result 269 states and 336 transitions. [2021-05-06 08:12:51,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:12:51,915 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 92 [2021-05-06 08:12:51,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:51,916 INFO L225 Difference]: With dead ends: 269 [2021-05-06 08:12:51,916 INFO L226 Difference]: Without dead ends: 269 [2021-05-06 08:12:51,916 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 92.6ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:12:51,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-05-06 08:12:51,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 228. [2021-05-06 08:12:51,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 136 states have (on average 1.1397058823529411) internal successors, (155), 141 states have internal predecessors, (155), 61 states have call successors, (61), 31 states have call predecessors, (61), 30 states have return successors, (59), 55 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-06 08:12:51,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 275 transitions. [2021-05-06 08:12:51,926 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 275 transitions. Word has length 92 [2021-05-06 08:12:51,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:51,927 INFO L480 AbstractCegarLoop]: Abstraction has 228 states and 275 transitions. [2021-05-06 08:12:51,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:12:51,927 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 275 transitions. [2021-05-06 08:12:51,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-06 08:12:51,928 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:51,928 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:12:52,153 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-06 08:12:52,153 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:52,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:52,153 INFO L82 PathProgramCache]: Analyzing trace with hash 264417969, now seen corresponding path program 10 times [2021-05-06 08:12:52,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:52,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220444492] [2021-05-06 08:12:52,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:52,161 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:52,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1594160642] [2021-05-06 08:12:52,161 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 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 08:12:52,221 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:12:52,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:12:52,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-06 08:12:52,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:52,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:52,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:52,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:52,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:52,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:52,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:52,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:52,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:52,551 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 56 proven. 54 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2021-05-06 08:12:52,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:52,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220444492] [2021-05-06 08:12:52,551 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:52,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594160642] [2021-05-06 08:12:52,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594160642] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:52,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:52,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:12:52,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640018025] [2021-05-06 08:12:52,552 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:12:52,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:52,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:12:52,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:12:52,553 INFO L87 Difference]: Start difference. First operand 228 states and 275 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 08:12:53,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:53,557 INFO L93 Difference]: Finished difference Result 256 states and 312 transitions. [2021-05-06 08:12:53,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:12:53,557 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 92 [2021-05-06 08:12:53,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:53,559 INFO L225 Difference]: With dead ends: 256 [2021-05-06 08:12:53,559 INFO L226 Difference]: Without dead ends: 256 [2021-05-06 08:12:53,559 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 135.5ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:12:53,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-05-06 08:12:53,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 242. [2021-05-06 08:12:53,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 145 states have (on average 1.1379310344827587) internal successors, (165), 150 states have internal predecessors, (165), 64 states have call successors, (64), 33 states have call predecessors, (64), 32 states have return successors, (62), 58 states have call predecessors, (62), 62 states have call successors, (62) [2021-05-06 08:12:53,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 291 transitions. [2021-05-06 08:12:53,567 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 291 transitions. Word has length 92 [2021-05-06 08:12:53,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:53,567 INFO L480 AbstractCegarLoop]: Abstraction has 242 states and 291 transitions. [2021-05-06 08:12:53,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 08:12:53,567 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 291 transitions. [2021-05-06 08:12:53,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-06 08:12:53,569 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:53,569 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:12:53,795 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-06 08:12:53,795 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:53,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:53,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1542255729, now seen corresponding path program 11 times [2021-05-06 08:12:53,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:53,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127213861] [2021-05-06 08:12:53,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:53,810 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:53,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1606494450] [2021-05-06 08:12:53,810 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 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 08:12:54,165 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-06 08:12:54,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:12:54,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-06 08:12:54,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:54,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:54,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:54,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:54,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:54,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:54,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:54,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:54,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:54,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:54,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:54,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:54,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:54,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:54,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:54,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:54,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:54,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:54,454 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 20 proven. 27 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2021-05-06 08:12:54,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:54,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127213861] [2021-05-06 08:12:54,454 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:54,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606494450] [2021-05-06 08:12:54,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606494450] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:54,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:54,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:12:54,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983924489] [2021-05-06 08:12:54,455 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:12:54,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:54,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:12:54,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:12:54,456 INFO L87 Difference]: Start difference. First operand 242 states and 291 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:12:54,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:54,692 INFO L93 Difference]: Finished difference Result 268 states and 325 transitions. [2021-05-06 08:12:54,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:12:54,693 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 92 [2021-05-06 08:12:54,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:54,694 INFO L225 Difference]: With dead ends: 268 [2021-05-06 08:12:54,694 INFO L226 Difference]: Without dead ends: 268 [2021-05-06 08:12:54,694 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 97.2ms TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:12:54,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-05-06 08:12:54,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 244. [2021-05-06 08:12:54,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 147 states have (on average 1.1360544217687074) internal successors, (167), 151 states have internal predecessors, (167), 63 states have call successors, (63), 34 states have call predecessors, (63), 33 states have return successors, (61), 58 states have call predecessors, (61), 61 states have call successors, (61) [2021-05-06 08:12:54,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 291 transitions. [2021-05-06 08:12:54,703 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 291 transitions. Word has length 92 [2021-05-06 08:12:54,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:54,703 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 291 transitions. [2021-05-06 08:12:54,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:12:54,703 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 291 transitions. [2021-05-06 08:12:54,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-06 08:12:54,704 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:54,704 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:12:54,920 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:54,921 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:54,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:54,921 INFO L82 PathProgramCache]: Analyzing trace with hash -2059609870, now seen corresponding path program 12 times [2021-05-06 08:12:54,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:54,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941194628] [2021-05-06 08:12:54,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:54,950 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:54,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [237117142] [2021-05-06 08:12:54,950 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 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 08:12:55,509 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-06 08:12:55,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:12:55,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-06 08:12:55,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:55,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:55,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:55,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:55,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:55,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:55,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:55,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:55,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:55,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:55,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:55,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:55,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:55,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:55,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:55,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:55,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:55,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:55,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:55,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:55,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:55,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:55,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:55,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:55,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:55,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:55,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:55,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:55,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:55,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:55,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:55,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:55,954 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 87 proven. 12 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2021-05-06 08:12:55,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:55,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941194628] [2021-05-06 08:12:55,954 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:55,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237117142] [2021-05-06 08:12:55,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237117142] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:55,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:55,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 08:12:55,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209111339] [2021-05-06 08:12:55,955 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 08:12:55,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:55,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 08:12:55,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:12:55,956 INFO L87 Difference]: Start difference. First operand 244 states and 291 transitions. Second operand has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 08:12:56,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:56,779 INFO L93 Difference]: Finished difference Result 315 states and 393 transitions. [2021-05-06 08:12:56,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:12:56,780 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) Word has length 92 [2021-05-06 08:12:56,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:56,781 INFO L225 Difference]: With dead ends: 315 [2021-05-06 08:12:56,782 INFO L226 Difference]: Without dead ends: 311 [2021-05-06 08:12:56,782 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 341.0ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:12:56,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-05-06 08:12:56,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 254. [2021-05-06 08:12:56,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 153 states have (on average 1.1241830065359477) internal successors, (172), 158 states have internal predecessors, (172), 65 states have call successors, (65), 36 states have call predecessors, (65), 35 states have return successors, (63), 59 states have call predecessors, (63), 63 states have call successors, (63) [2021-05-06 08:12:56,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 300 transitions. [2021-05-06 08:12:56,813 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 300 transitions. Word has length 92 [2021-05-06 08:12:56,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:56,814 INFO L480 AbstractCegarLoop]: Abstraction has 254 states and 300 transitions. [2021-05-06 08:12:56,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 08:12:56,814 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 300 transitions. [2021-05-06 08:12:56,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-06 08:12:56,815 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:56,815 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:12:57,023 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-06 08:12:57,024 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:57,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:57,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1250826676, now seen corresponding path program 13 times [2021-05-06 08:12:57,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:57,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915553063] [2021-05-06 08:12:57,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:57,036 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:57,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [933706356] [2021-05-06 08:12:57,037 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:57,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:57,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-06 08:12:57,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:57,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,375 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 59 proven. 47 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-05-06 08:12:57,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:57,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915553063] [2021-05-06 08:12:57,376 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:57,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933706356] [2021-05-06 08:12:57,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933706356] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:57,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:57,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:12:57,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361730178] [2021-05-06 08:12:57,376 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:12:57,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:57,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:12:57,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:12:57,377 INFO L87 Difference]: Start difference. First operand 254 states and 300 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-06 08:12:57,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:57,774 INFO L93 Difference]: Finished difference Result 304 states and 364 transitions. [2021-05-06 08:12:57,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:12:57,775 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 97 [2021-05-06 08:12:57,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:57,777 INFO L225 Difference]: With dead ends: 304 [2021-05-06 08:12:57,777 INFO L226 Difference]: Without dead ends: 296 [2021-05-06 08:12:57,777 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 124.3ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:12:57,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-05-06 08:12:57,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 296. [2021-05-06 08:12:57,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 180 states have (on average 1.1222222222222222) internal successors, (202), 185 states have internal predecessors, (202), 74 states have call successors, (74), 42 states have call predecessors, (74), 41 states have return successors, (72), 68 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-06 08:12:57,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 348 transitions. [2021-05-06 08:12:57,787 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 348 transitions. Word has length 97 [2021-05-06 08:12:57,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:57,787 INFO L480 AbstractCegarLoop]: Abstraction has 296 states and 348 transitions. [2021-05-06 08:12:57,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-06 08:12:57,787 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 348 transitions. [2021-05-06 08:12:57,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-06 08:12:57,788 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:57,788 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:12:58,003 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:58,003 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:58,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:58,003 INFO L82 PathProgramCache]: Analyzing trace with hash -2018648621, now seen corresponding path program 14 times [2021-05-06 08:12:58,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:58,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636146991] [2021-05-06 08:12:58,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:58,008 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:58,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1389302518] [2021-05-06 08:12:58,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:58,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:12:58,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:12:58,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-06 08:12:58,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:58,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:58,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:58,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:58,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:58,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:58,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:58,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:58,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:58,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:58,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:58,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:58,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:58,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:58,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:58,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:58,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:58,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:58,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:58,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:58,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:58,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:58,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:58,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:58,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:58,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:58,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:58,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:58,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:58,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:58,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:58,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:58,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:58,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:58,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:58,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:59,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:59,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:59,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:00,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:00,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:00,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:00,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:00,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:00,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:00,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:00,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:00,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:00,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:00,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:00,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:00,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:01,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:01,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:01,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:01,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:01,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:01,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:01,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:01,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:01,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:01,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:01,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:01,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:01,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:01,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:01,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:01,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:01,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:01,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:01,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:01,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:01,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:02,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:02,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:02,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:02,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:02,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:02,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:02,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:02,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:02,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:02,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:02,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:02,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:02,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:02,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:02,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:02,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:02,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:02,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:02,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:02,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:02,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:02,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:03,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:03,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:03,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:03,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:03,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:03,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:03,192 WARN L159 QuantifierPusher]: Ignoring assumption.