/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/ps4-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 10:23:53,103 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 10:23:53,104 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 10:23:53,122 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 10:23:53,122 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 10:23:53,123 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 10:23:53,124 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 10:23:53,125 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 10:23:53,127 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 10:23:53,127 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 10:23:53,128 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 10:23:53,129 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 10:23:53,129 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 10:23:53,129 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 10:23:53,130 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 10:23:53,131 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 10:23:53,131 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 10:23:53,132 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 10:23:53,133 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 10:23:53,134 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 10:23:53,135 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 10:23:53,140 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 10:23:53,141 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 10:23:53,141 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 10:23:53,143 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 10:23:53,149 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 10:23:53,149 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 10:23:53,150 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 10:23:53,155 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 10:23:53,163 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 10:23:53,163 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 10:23:53,164 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 10:23:53,164 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 10:23:53,164 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 10:23:53,165 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 10:23:53,165 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 10:23:53,165 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 10:23:53,165 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 10:23:53,165 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 10:23:53,166 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 10:23:53,166 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 10:23:53,166 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 10:23:53,166 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 10:23:53,167 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 10:23:53,167 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 10:23:53,167 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 10:23:53,167 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 10:23:53,167 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 10:23:53,168 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 10:23:53,168 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 10:23:53,168 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 10:23:53,169 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 10:23:53,431 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 10:23:53,447 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 10:23:53,449 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 10:23:53,450 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 10:23:53,452 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 10:23:53,453 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound10.c [2021-05-06 10:23:53,517 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a49845743/c1c1d3ad6580472a8039b0782cdbe01d/FLAGbfa237f8e [2021-05-06 10:23:53,845 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 10:23:53,845 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound10.c [2021-05-06 10:23:53,849 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a49845743/c1c1d3ad6580472a8039b0782cdbe01d/FLAGbfa237f8e [2021-05-06 10:23:53,858 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a49845743/c1c1d3ad6580472a8039b0782cdbe01d [2021-05-06 10:23:53,860 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 10:23:53,861 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 10:23:53,862 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 10:23:53,862 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 10:23:53,864 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 10:23:53,865 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:23:53" (1/1) ... [2021-05-06 10:23:53,866 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@88324bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:23:53, skipping insertion in model container [2021-05-06 10:23:53,866 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:23:53" (1/1) ... [2021-05-06 10:23:53,870 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 10:23:53,878 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 10:23:53,960 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/ps4-ll_unwindbound10.c[458,471] [2021-05-06 10:23:53,968 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:23:53,972 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 10:23:53,979 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/ps4-ll_unwindbound10.c[458,471] [2021-05-06 10:23:53,983 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:23:53,990 INFO L208 MainTranslator]: Completed translation [2021-05-06 10:23:53,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:23:53 WrapperNode [2021-05-06 10:23:53,991 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 10:23:53,992 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 10:23:53,992 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 10:23:53,992 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 10:23:53,998 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:23:53" (1/1) ... [2021-05-06 10:23:53,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:23:53" (1/1) ... [2021-05-06 10:23:54,002 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:23:53" (1/1) ... [2021-05-06 10:23:54,002 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:23:53" (1/1) ... [2021-05-06 10:23:54,036 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:23:53" (1/1) ... [2021-05-06 10:23:54,038 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:23:53" (1/1) ... [2021-05-06 10:23:54,044 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:23:53" (1/1) ... [2021-05-06 10:23:54,047 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 10:23:54,047 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 10:23:54,047 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 10:23:54,047 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 10:23:54,048 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:23:53" (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 10:23:54,093 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 10:23:54,093 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 10:23:54,093 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 10:23:54,093 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 10:23:54,094 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 10:23:54,094 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 10:23:54,094 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 10:23:54,094 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 10:23:54,094 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 10:23:54,094 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 10:23:54,094 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-06 10:23:54,094 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 10:23:54,094 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 10:23:54,095 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 10:23:54,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 10:23:54,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 10:23:54,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 10:23:54,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 10:23:54,095 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 10:23:54,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 10:23:54,231 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 10:23:54,232 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 10:23:54,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:23:54 BoogieIcfgContainer [2021-05-06 10:23:54,233 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 10:23:54,233 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 10:23:54,233 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 10:23:54,234 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 10:23:54,235 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:23:54" (1/1) ... [2021-05-06 10:23:54,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:23:54 BasicIcfg [2021-05-06 10:23:54,254 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 10:23:54,255 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 10:23:54,255 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 10:23:54,257 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 10:23:54,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 10:23:53" (1/4) ... [2021-05-06 10:23:54,257 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@170d44af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:23:54, skipping insertion in model container [2021-05-06 10:23:54,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:23:53" (2/4) ... [2021-05-06 10:23:54,257 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@170d44af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:23:54, skipping insertion in model container [2021-05-06 10:23:54,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:23:54" (3/4) ... [2021-05-06 10:23:54,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@170d44af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 10:23:54, skipping insertion in model container [2021-05-06 10:23:54,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:23:54" (4/4) ... [2021-05-06 10:23:54,258 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_unwindbound10.cJordan [2021-05-06 10:23:54,278 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 10:23:54,280 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 10:23:54,291 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 10:23:54,303 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 10:23:54,303 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 10:23:54,303 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 10:23:54,303 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 10:23:54,303 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 10:23:54,303 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 10:23:54,303 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 10:23:54,303 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 10:23:54,311 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 10:23:54,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 10:23:54,315 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:23:54,316 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:23:54,316 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:23:54,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:23:54,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1984627219, now seen corresponding path program 1 times [2021-05-06 10:23:54,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:23:54,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119998529] [2021-05-06 10:23:54,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:23:54,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:23:54,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 10:23:54,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:23:54,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:23:54,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:23:54,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119998529] [2021-05-06 10:23:54,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119998529] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:23:54,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:23:54,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 10:23:54,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136438764] [2021-05-06 10:23:54,487 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 10:23:54,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:23:54,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 10:23:54,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:23:54,496 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 10:23:54,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:23:54,540 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2021-05-06 10:23:54,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 10:23:54,541 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-06 10:23:54,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:23:54,546 INFO L225 Difference]: With dead ends: 24 [2021-05-06 10:23:54,546 INFO L226 Difference]: Without dead ends: 19 [2021-05-06 10:23:54,547 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:23:54,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-06 10:23:54,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-05-06 10:23:54,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 10:23:54,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-05-06 10:23:54,567 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 11 [2021-05-06 10:23:54,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:23:54,568 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-05-06 10:23:54,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 10:23:54,568 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-05-06 10:23:54,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 10:23:54,568 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:23:54,568 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:23:54,569 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 10:23:54,569 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:23:54,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:23:54,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1423332195, now seen corresponding path program 1 times [2021-05-06 10:23:54,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:23:54,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659715360] [2021-05-06 10:23:54,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:23:54,580 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:23:54,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1930443409] [2021-05-06 10:23:54,581 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 10:23:54,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:23:54,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 10:23:54,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:23:54,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:54,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:54,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:54,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:54,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:54,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:23:54,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:23:54,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659715360] [2021-05-06 10:23:54,745 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:23:54,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930443409] [2021-05-06 10:23:54,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930443409] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:23:54,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:23:54,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 10:23:54,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912591749] [2021-05-06 10:23:54,747 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 10:23:54,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:23:54,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 10:23:54,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 10:23:54,750 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 10:23:54,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:23:54,761 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2021-05-06 10:23:54,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 10:23:54,762 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 10:23:54,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:23:54,762 INFO L225 Difference]: With dead ends: 20 [2021-05-06 10:23:54,763 INFO L226 Difference]: Without dead ends: 20 [2021-05-06 10:23:54,763 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 10:23:54,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-06 10:23:54,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-05-06 10:23:54,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 10:23:54,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-05-06 10:23:54,772 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2021-05-06 10:23:54,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:23:54,772 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-05-06 10:23:54,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 10:23:54,773 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-05-06 10:23:54,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 10:23:54,773 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:23:54,777 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:23:54,989 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 10:23:54,989 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:23:54,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:23:54,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1424404671, now seen corresponding path program 1 times [2021-05-06 10:23:54,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:23:54,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44199296] [2021-05-06 10:23:54,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:23:54,998 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:23:54,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1865374131] [2021-05-06 10:23:54,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:23:55,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:23:55,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 10:23:55,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:23:55,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:55,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:23:55,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:23:55,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44199296] [2021-05-06 10:23:55,115 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:23:55,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865374131] [2021-05-06 10:23:55,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865374131] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:23:55,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:23:55,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 10:23:55,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397709066] [2021-05-06 10:23:55,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:23:55,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:23:55,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:23:55,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:23:55,116 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 10:23:55,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:23:55,150 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2021-05-06 10:23:55,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 10:23:55,151 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 10:23:55,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:23:55,152 INFO L225 Difference]: With dead ends: 28 [2021-05-06 10:23:55,152 INFO L226 Difference]: Without dead ends: 26 [2021-05-06 10:23:55,152 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:23:55,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-06 10:23:55,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-06 10:23:55,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 10:23:55,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-05-06 10:23:55,160 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 12 [2021-05-06 10:23:55,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:23:55,160 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-05-06 10:23:55,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 10:23:55,160 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-05-06 10:23:55,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 10:23:55,161 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:23:55,161 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:23:55,377 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:23:55,377 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:23:55,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:23:55,378 INFO L82 PathProgramCache]: Analyzing trace with hash -381498108, now seen corresponding path program 1 times [2021-05-06 10:23:55,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:23:55,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287271568] [2021-05-06 10:23:55,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:23:55,396 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:23:55,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1430397282] [2021-05-06 10:23:55,396 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 10:23:55,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:23:55,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 10:23:55,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:23:55,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:55,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:55,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:55,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:55,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:55,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:55,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:55,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:55,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:23:55,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:23:55,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287271568] [2021-05-06 10:23:55,538 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:23:55,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430397282] [2021-05-06 10:23:55,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430397282] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:23:55,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:23:55,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 10:23:55,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932908845] [2021-05-06 10:23:55,538 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:23:55,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:23:55,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:23:55,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:23:55,540 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 10:23:55,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:23:55,564 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2021-05-06 10:23:55,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:23:55,564 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-06 10:23:55,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:23:55,565 INFO L225 Difference]: With dead ends: 28 [2021-05-06 10:23:55,565 INFO L226 Difference]: Without dead ends: 28 [2021-05-06 10:23:55,567 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.6ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:23:55,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-06 10:23:55,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-05-06 10:23:55,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 10:23:55,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-05-06 10:23:55,572 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 20 [2021-05-06 10:23:55,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:23:55,572 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-05-06 10:23:55,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 10:23:55,573 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-05-06 10:23:55,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 10:23:55,573 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:23:55,573 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:23:55,791 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:23:55,792 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:23:55,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:23:55,792 INFO L82 PathProgramCache]: Analyzing trace with hash -380425632, now seen corresponding path program 1 times [2021-05-06 10:23:55,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:23:55,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005991343] [2021-05-06 10:23:55,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:23:55,799 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:23:55,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1795618836] [2021-05-06 10:23:55,799 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 10:23:55,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:23:55,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 10:23:55,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:23:55,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:55,912 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:23:55,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:23:55,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005991343] [2021-05-06 10:23:55,913 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:23:55,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795618836] [2021-05-06 10:23:55,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795618836] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:23:55,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:23:55,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 10:23:55,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334036692] [2021-05-06 10:23:55,915 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:23:55,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:23:55,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:23:55,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:23:55,915 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 10:23:55,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:23:55,955 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2021-05-06 10:23:55,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:23:55,956 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-06 10:23:55,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:23:55,957 INFO L225 Difference]: With dead ends: 36 [2021-05-06 10:23:55,957 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 10:23:55,958 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.8ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:23:55,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 10:23:55,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 10:23:55,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 10:23:55,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-05-06 10:23:55,967 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 20 [2021-05-06 10:23:55,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:23:55,967 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-05-06 10:23:55,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 10:23:55,967 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-05-06 10:23:55,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-06 10:23:55,968 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:23:55,969 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:23:56,184 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:23:56,185 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:23:56,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:23:56,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1647871298, now seen corresponding path program 1 times [2021-05-06 10:23:56,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:23:56,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247862156] [2021-05-06 10:23:56,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:23:56,192 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:23:56,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [418813824] [2021-05-06 10:23:56,192 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 10:23:56,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:23:56,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 10:23:56,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:23:56,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:56,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:56,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:56,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:56,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:56,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:56,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:56,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:56,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:56,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:56,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:57,278 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 9 [2021-05-06 10:23:57,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:57,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:57,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:57,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:57,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:57,338 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 10:23:57,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:23:57,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247862156] [2021-05-06 10:23:57,339 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:23:57,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418813824] [2021-05-06 10:23:57,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418813824] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:23:57,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:23:57,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 10:23:57,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415450717] [2021-05-06 10:23:57,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 10:23:57,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:23:57,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 10:23:57,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 10:23:57,340 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 10:23:57,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:23:57,438 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2021-05-06 10:23:57,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 10:23:57,439 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2021-05-06 10:23:57,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:23:57,439 INFO L225 Difference]: With dead ends: 39 [2021-05-06 10:23:57,439 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 10:23:57,440 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 965.5ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-05-06 10:23:57,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 10:23:57,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-06 10:23:57,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 10:23:57,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-05-06 10:23:57,442 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 26 [2021-05-06 10:23:57,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:23:57,442 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-05-06 10:23:57,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 10:23:57,442 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-05-06 10:23:57,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 10:23:57,443 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:23:57,443 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:23:57,657 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 10:23:57,657 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:23:57,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:23:57,657 INFO L82 PathProgramCache]: Analyzing trace with hash -382724699, now seen corresponding path program 2 times [2021-05-06 10:23:57,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:23:57,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59225432] [2021-05-06 10:23:57,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:23:57,670 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:23:57,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [950142959] [2021-05-06 10:23:57,671 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 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 10:23:57,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:23:57,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:23:57,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 10:23:57,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:23:57,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:57,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:57,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:57,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:57,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:57,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:57,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:57,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:57,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:57,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:57,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:57,794 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:23:57,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:23:57,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59225432] [2021-05-06 10:23:57,795 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:23:57,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950142959] [2021-05-06 10:23:57,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950142959] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:23:57,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:23:57,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 10:23:57,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789333801] [2021-05-06 10:23:57,795 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:23:57,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:23:57,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:23:57,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:23:57,796 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 10:23:57,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:23:57,825 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-05-06 10:23:57,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 10:23:57,826 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-06 10:23:57,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:23:57,826 INFO L225 Difference]: With dead ends: 36 [2021-05-06 10:23:57,826 INFO L226 Difference]: Without dead ends: 36 [2021-05-06 10:23:57,826 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 18.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:23:57,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-06 10:23:57,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-06 10:23:57,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 10:23:57,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2021-05-06 10:23:57,829 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 28 [2021-05-06 10:23:57,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:23:57,829 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2021-05-06 10:23:57,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 10:23:57,829 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2021-05-06 10:23:57,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 10:23:57,829 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:23:57,829 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:23:58,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:23:58,037 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:23:58,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:23:58,037 INFO L82 PathProgramCache]: Analyzing trace with hash -381652223, now seen corresponding path program 2 times [2021-05-06 10:23:58,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:23:58,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28888693] [2021-05-06 10:23:58,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:23:58,044 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:23:58,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [203923022] [2021-05-06 10:23:58,044 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 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 10:23:58,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:23:58,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:23:58,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 10:23:58,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:23:58,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:58,219 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 10:23:58,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:23:58,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28888693] [2021-05-06 10:23:58,219 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:23:58,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203923022] [2021-05-06 10:23:58,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203923022] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:23:58,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:23:58,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 10:23:58,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055686223] [2021-05-06 10:23:58,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 10:23:58,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:23:58,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 10:23:58,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 10:23:58,220 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 10:23:58,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:23:58,313 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2021-05-06 10:23:58,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 10:23:58,313 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-06 10:23:58,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:23:58,315 INFO L225 Difference]: With dead ends: 44 [2021-05-06 10:23:58,315 INFO L226 Difference]: Without dead ends: 43 [2021-05-06 10:23:58,316 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 69.7ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-06 10:23:58,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-06 10:23:58,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-06 10:23:58,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 30 states have internal predecessors, (32), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 10:23:58,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-05-06 10:23:58,318 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 28 [2021-05-06 10:23:58,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:23:58,319 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-05-06 10:23:58,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 10:23:58,319 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-05-06 10:23:58,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 10:23:58,319 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:23:58,319 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:23:58,535 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:23:58,536 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:23:58,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:23:58,536 INFO L82 PathProgramCache]: Analyzing trace with hash 31133987, now seen corresponding path program 2 times [2021-05-06 10:23:58,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:23:58,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434373365] [2021-05-06 10:23:58,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:23:58,542 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:23:58,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [865752750] [2021-05-06 10:23:58,542 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 10:23:58,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:23:58,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:23:58,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-06 10:23:58,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:23:58,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:58,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:58,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:58,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:58,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:58,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:58,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:58,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:58,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:58,744 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-06 10:23:58,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:23:58,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434373365] [2021-05-06 10:23:58,744 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:23:58,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865752750] [2021-05-06 10:23:58,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865752750] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:23:58,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:23:58,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 10:23:58,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717297691] [2021-05-06 10:23:58,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 10:23:58,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:23:58,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 10:23:58,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-06 10:23:58,745 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 10:23:58,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:23:58,839 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2021-05-06 10:23:58,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 10:23:58,840 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 34 [2021-05-06 10:23:58,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:23:58,840 INFO L225 Difference]: With dead ends: 47 [2021-05-06 10:23:58,840 INFO L226 Difference]: Without dead ends: 42 [2021-05-06 10:23:58,841 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 90.2ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-06 10:23:58,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-06 10:23:58,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-05-06 10:23:58,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 10:23:58,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-05-06 10:23:58,843 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 34 [2021-05-06 10:23:58,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:23:58,843 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-05-06 10:23:58,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 10:23:58,843 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-05-06 10:23:58,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 10:23:58,844 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:23:58,844 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:23:59,052 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 10:23:59,053 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:23:59,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:23:59,053 INFO L82 PathProgramCache]: Analyzing trace with hash 710880582, now seen corresponding path program 3 times [2021-05-06 10:23:59,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:23:59,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891653729] [2021-05-06 10:23:59,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:23:59,059 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:23:59,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1998809792] [2021-05-06 10:23:59,059 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 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 10:23:59,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 10:23:59,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:23:59,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 10:23:59,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:23:59,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:59,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:59,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:59,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:59,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:59,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:59,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:59,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:59,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:59,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:59,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:59,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:59,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:59,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:59,195 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:23:59,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:23:59,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891653729] [2021-05-06 10:23:59,195 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:23:59,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998809792] [2021-05-06 10:23:59,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998809792] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:23:59,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:23:59,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:23:59,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281449233] [2021-05-06 10:23:59,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:23:59,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:23:59,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:23:59,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:23:59,196 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 10:23:59,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:23:59,235 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2021-05-06 10:23:59,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 10:23:59,236 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2021-05-06 10:23:59,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:23:59,236 INFO L225 Difference]: With dead ends: 44 [2021-05-06 10:23:59,236 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 10:23:59,236 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 27.4ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-06 10:23:59,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 10:23:59,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-06 10:23:59,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.1) internal successors, (33), 31 states have internal predecessors, (33), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 10:23:59,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2021-05-06 10:23:59,239 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 36 [2021-05-06 10:23:59,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:23:59,239 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2021-05-06 10:23:59,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 10:23:59,239 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2021-05-06 10:23:59,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 10:23:59,239 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:23:59,239 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:23:59,458 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:23:59,458 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:23:59,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:23:59,459 INFO L82 PathProgramCache]: Analyzing trace with hash 711953058, now seen corresponding path program 3 times [2021-05-06 10:23:59,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:23:59,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955182638] [2021-05-06 10:23:59,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:23:59,463 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:23:59,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1443713463] [2021-05-06 10:23:59,464 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 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 10:23:59,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 10:23:59,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:23:59,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 10:23:59,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:23:59,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:59,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:59,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:59,660 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 10:23:59,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:23:59,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955182638] [2021-05-06 10:23:59,660 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:23:59,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443713463] [2021-05-06 10:23:59,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443713463] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:23:59,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:23:59,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:23:59,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195645092] [2021-05-06 10:23:59,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:23:59,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:23:59,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:23:59,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:23:59,661 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 10:23:59,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:23:59,703 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2021-05-06 10:23:59,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 10:23:59,703 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2021-05-06 10:23:59,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:23:59,704 INFO L225 Difference]: With dead ends: 48 [2021-05-06 10:23:59,704 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 10:23:59,704 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 33.1ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 10:23:59,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 10:23:59,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-05-06 10:23:59,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 10:23:59,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-05-06 10:23:59,706 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 36 [2021-05-06 10:23:59,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:23:59,706 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-05-06 10:23:59,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 10:23:59,706 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-05-06 10:23:59,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 10:23:59,707 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:23:59,707 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:23:59,913 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:23:59,914 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:23:59,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:23:59,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1474833412, now seen corresponding path program 3 times [2021-05-06 10:23:59,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:23:59,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286743071] [2021-05-06 10:23:59,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:23:59,931 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:23:59,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [107126670] [2021-05-06 10:23:59,931 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 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 10:23:59,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 10:23:59,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:23:59,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 10:23:59,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:24:00,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:00,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:00,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:00,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:00,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:00,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:00,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:00,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:00,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:00,109 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 10:24:00,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:24:00,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286743071] [2021-05-06 10:24:00,109 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:24:00,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107126670] [2021-05-06 10:24:00,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107126670] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:24:00,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:24:00,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 10:24:00,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999755416] [2021-05-06 10:24:00,110 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 10:24:00,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:24:00,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 10:24:00,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-06 10:24:00,110 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 10:24:00,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:24:00,169 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2021-05-06 10:24:00,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 10:24:00,170 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 42 [2021-05-06 10:24:00,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:24:00,170 INFO L225 Difference]: With dead ends: 50 [2021-05-06 10:24:00,170 INFO L226 Difference]: Without dead ends: 47 [2021-05-06 10:24:00,171 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 46.9ms TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-06 10:24:00,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-06 10:24:00,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-05-06 10:24:00,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 10:24:00,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2021-05-06 10:24:00,173 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 42 [2021-05-06 10:24:00,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:24:00,173 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2021-05-06 10:24:00,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 10:24:00,173 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2021-05-06 10:24:00,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 10:24:00,174 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:24:00,174 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:24:00,380 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 10:24:00,381 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:24:00,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:24:00,381 INFO L82 PathProgramCache]: Analyzing trace with hash 831591399, now seen corresponding path program 4 times [2021-05-06 10:24:00,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:24:00,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162322060] [2021-05-06 10:24:00,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:24:00,386 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:24:00,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1592159801] [2021-05-06 10:24:00,386 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 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 10:24:00,444 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 10:24:00,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:24:00,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 10:24:00,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:24:00,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:00,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:00,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:00,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:00,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:00,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:00,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:00,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:00,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:00,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:00,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:00,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:00,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:00,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:00,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:00,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:00,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:00,521 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:24:00,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:24:00,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162322060] [2021-05-06 10:24:00,522 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:24:00,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592159801] [2021-05-06 10:24:00,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592159801] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:24:00,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:24:00,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 10:24:00,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996738878] [2021-05-06 10:24:00,522 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 10:24:00,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:24:00,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 10:24:00,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:24:00,523 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 10:24:00,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:24:00,595 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2021-05-06 10:24:00,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 10:24:00,596 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 44 [2021-05-06 10:24:00,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:24:00,597 INFO L225 Difference]: With dead ends: 53 [2021-05-06 10:24:00,597 INFO L226 Difference]: Without dead ends: 53 [2021-05-06 10:24:00,597 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 34.3ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-06 10:24:00,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-06 10:24:00,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-05-06 10:24:00,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 10:24:00,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-05-06 10:24:00,600 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 44 [2021-05-06 10:24:00,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:24:00,600 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-05-06 10:24:00,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 10:24:00,601 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-05-06 10:24:00,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 10:24:00,601 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:24:00,601 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:24:00,804 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 10:24:00,805 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:24:00,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:24:00,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1805593115, now seen corresponding path program 4 times [2021-05-06 10:24:00,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:24:00,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050393468] [2021-05-06 10:24:00,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:24:00,810 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:24:00,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [318684706] [2021-05-06 10:24:00,810 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 10:24:00,886 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 10:24:00,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:24:00,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-06 10:24:00,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:24:00,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:00,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:00,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:00,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:00,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:01,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:01,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:01,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:01,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:01,021 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 10 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 10:24:01,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:24:01,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050393468] [2021-05-06 10:24:01,022 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:24:01,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318684706] [2021-05-06 10:24:01,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318684706] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:24:01,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:24:01,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 10:24:01,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553827532] [2021-05-06 10:24:01,022 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 10:24:01,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:24:01,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 10:24:01,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-06 10:24:01,023 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 10:24:01,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:24:01,100 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2021-05-06 10:24:01,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 10:24:01,101 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 50 [2021-05-06 10:24:01,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:24:01,101 INFO L225 Difference]: With dead ends: 58 [2021-05-06 10:24:01,101 INFO L226 Difference]: Without dead ends: 55 [2021-05-06 10:24:01,101 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 57.2ms TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-06 10:24:01,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-06 10:24:01,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-06 10:24:01,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 10:24:01,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2021-05-06 10:24:01,104 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 50 [2021-05-06 10:24:01,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:24:01,105 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2021-05-06 10:24:01,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 10:24:01,105 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2021-05-06 10:24:01,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-06 10:24:01,105 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:24:01,105 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:24:01,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 10:24:01,309 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:24:01,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:24:01,309 INFO L82 PathProgramCache]: Analyzing trace with hash 847694216, now seen corresponding path program 5 times [2021-05-06 10:24:01,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:24:01,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018997691] [2021-05-06 10:24:01,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:24:01,313 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:24:01,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1071593902] [2021-05-06 10:24:01,314 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 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 10:24:01,364 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 10:24:01,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:24:01,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 10:24:01,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:24:01,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:01,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:01,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:01,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:01,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:01,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:01,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:01,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:01,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:01,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:01,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:01,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:01,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:01,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:01,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:01,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:01,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:01,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:01,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:01,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:01,485 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:24:01,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:24:01,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018997691] [2021-05-06 10:24:01,485 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:24:01,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071593902] [2021-05-06 10:24:01,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071593902] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:24:01,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:24:01,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 10:24:01,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119205579] [2021-05-06 10:24:01,485 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 10:24:01,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:24:01,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 10:24:01,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 10:24:01,486 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 10:24:01,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:24:01,546 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2021-05-06 10:24:01,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 10:24:01,546 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 52 [2021-05-06 10:24:01,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:24:01,547 INFO L225 Difference]: With dead ends: 61 [2021-05-06 10:24:01,547 INFO L226 Difference]: Without dead ends: 61 [2021-05-06 10:24:01,547 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 52.1ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-05-06 10:24:01,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-06 10:24:01,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-05-06 10:24:01,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 10:24:01,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2021-05-06 10:24:01,549 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 52 [2021-05-06 10:24:01,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:24:01,549 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2021-05-06 10:24:01,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 10:24:01,549 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2021-05-06 10:24:01,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-06 10:24:01,550 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:24:01,550 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:24:01,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:24:01,761 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:24:01,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:24:01,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1447431878, now seen corresponding path program 5 times [2021-05-06 10:24:01,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:24:01,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741182712] [2021-05-06 10:24:01,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:24:01,768 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:24:01,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [266633162] [2021-05-06 10:24:01,768 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 10:24:01,921 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 10:24:01,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:24:01,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-06 10:24:01,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:24:02,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:02,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:02,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:02,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:02,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:02,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:02,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:02,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:02,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:02,068 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-06 10:24:02,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:24:02,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741182712] [2021-05-06 10:24:02,068 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:24:02,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266633162] [2021-05-06 10:24:02,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266633162] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:24:02,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:24:02,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 10:24:02,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910554837] [2021-05-06 10:24:02,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 10:24:02,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:24:02,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 10:24:02,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-05-06 10:24:02,069 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 10:24:02,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:24:02,166 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2021-05-06 10:24:02,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 10:24:02,167 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 58 [2021-05-06 10:24:02,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:24:02,167 INFO L225 Difference]: With dead ends: 66 [2021-05-06 10:24:02,167 INFO L226 Difference]: Without dead ends: 63 [2021-05-06 10:24:02,167 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 77.5ms TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-05-06 10:24:02,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-06 10:24:02,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-05-06 10:24:02,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 45 states have internal predecessors, (47), 10 states have call successors, (10), 9 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 10:24:02,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2021-05-06 10:24:02,170 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 58 [2021-05-06 10:24:02,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:24:02,170 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2021-05-06 10:24:02,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 10:24:02,170 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2021-05-06 10:24:02,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-06 10:24:02,170 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:24:02,170 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:24:02,389 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:24:02,390 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:24:02,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:24:02,390 INFO L82 PathProgramCache]: Analyzing trace with hash 268521001, now seen corresponding path program 6 times [2021-05-06 10:24:02,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:24:02,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464121633] [2021-05-06 10:24:02,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:24:02,394 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:24:02,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1668552649] [2021-05-06 10:24:02,394 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 10:24:02,469 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-06 10:24:02,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:24:02,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 10:24:02,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:24:02,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:02,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:02,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:02,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:02,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:02,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:02,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:02,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:02,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:02,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:02,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:02,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:02,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:02,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:02,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:02,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:02,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:02,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:02,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:02,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:02,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:02,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:02,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:02,597 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:24:02,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:24:02,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464121633] [2021-05-06 10:24:02,598 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:24:02,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668552649] [2021-05-06 10:24:02,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668552649] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:24:02,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:24:02,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 10:24:02,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215175175] [2021-05-06 10:24:02,600 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 10:24:02,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:24:02,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 10:24:02,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-06 10:24:02,602 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 10:24:02,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:24:02,692 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2021-05-06 10:24:02,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 10:24:02,693 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 60 [2021-05-06 10:24:02,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:24:02,693 INFO L225 Difference]: With dead ends: 69 [2021-05-06 10:24:02,693 INFO L226 Difference]: Without dead ends: 69 [2021-05-06 10:24:02,694 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 55.1ms TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-05-06 10:24:02,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-06 10:24:02,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-05-06 10:24:02,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 10 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 10:24:02,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2021-05-06 10:24:02,698 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 60 [2021-05-06 10:24:02,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:24:02,698 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2021-05-06 10:24:02,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 10:24:02,698 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2021-05-06 10:24:02,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-06 10:24:02,699 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:24:02,699 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:24:02,912 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:24:02,913 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:24:02,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:24:02,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1416046937, now seen corresponding path program 6 times [2021-05-06 10:24:02,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:24:02,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871788972] [2021-05-06 10:24:02,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:24:02,917 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:24:02,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [72273180] [2021-05-06 10:24:02,917 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 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 10:24:03,092 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-06 10:24:03,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:24:03,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-06 10:24:03,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:24:03,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:03,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:03,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:03,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:03,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:03,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:03,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:03,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:03,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:03,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:03,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:03,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:03,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:03,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:03,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:03,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:03,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:03,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:03,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:03,264 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 14 proven. 84 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-05-06 10:24:03,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:24:03,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871788972] [2021-05-06 10:24:03,264 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:24:03,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72273180] [2021-05-06 10:24:03,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72273180] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:24:03,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:24:03,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 10:24:03,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287602450] [2021-05-06 10:24:03,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 10:24:03,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:24:03,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 10:24:03,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-05-06 10:24:03,265 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 10:24:03,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:24:03,378 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2021-05-06 10:24:03,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 10:24:03,379 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 66 [2021-05-06 10:24:03,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:24:03,379 INFO L225 Difference]: With dead ends: 74 [2021-05-06 10:24:03,379 INFO L226 Difference]: Without dead ends: 71 [2021-05-06 10:24:03,379 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 85.5ms TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-05-06 10:24:03,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-05-06 10:24:03,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-05-06 10:24:03,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 11 states have call successors, (11), 10 states have call predecessors, (11), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 10:24:03,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2021-05-06 10:24:03,381 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 66 [2021-05-06 10:24:03,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:24:03,382 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2021-05-06 10:24:03,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 10:24:03,382 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2021-05-06 10:24:03,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-06 10:24:03,382 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:24:03,382 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:24:03,598 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-06 10:24:03,599 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:24:03,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:24:03,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1539416522, now seen corresponding path program 7 times [2021-05-06 10:24:03,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:24:03,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125668800] [2021-05-06 10:24:03,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:24:03,603 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:24:03,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [931213096] [2021-05-06 10:24:03,603 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 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 10:24:03,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:24:03,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 10:24:03,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:24:03,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:03,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:03,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:03,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:03,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:03,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:03,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:03,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:03,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:03,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:03,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:03,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:03,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:03,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:03,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:03,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:03,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:03,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:03,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:03,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:03,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:03,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:03,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:03,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:03,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:03,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:03,795 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:24:03,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:24:03,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125668800] [2021-05-06 10:24:03,795 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:24:03,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931213096] [2021-05-06 10:24:03,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931213096] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:24:03,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:24:03,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 10:24:03,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238436720] [2021-05-06 10:24:03,796 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 10:24:03,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:24:03,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 10:24:03,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-06 10:24:03,796 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 10 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 10:24:03,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:24:03,884 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2021-05-06 10:24:03,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 10:24:03,884 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 10 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 68 [2021-05-06 10:24:03,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:24:03,885 INFO L225 Difference]: With dead ends: 77 [2021-05-06 10:24:03,885 INFO L226 Difference]: Without dead ends: 77 [2021-05-06 10:24:03,885 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 86.6ms TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2021-05-06 10:24:03,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-06 10:24:03,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-05-06 10:24:03,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 11 states have call successors, (11), 11 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 10:24:03,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2021-05-06 10:24:03,887 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 68 [2021-05-06 10:24:03,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:24:03,887 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2021-05-06 10:24:03,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 10 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 10:24:03,887 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2021-05-06 10:24:03,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-06 10:24:03,888 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:24:03,888 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:24:04,093 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-06 10:24:04,094 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:24:04,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:24:04,094 INFO L82 PathProgramCache]: Analyzing trace with hash 291122568, now seen corresponding path program 7 times [2021-05-06 10:24:04,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:24:04,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271027002] [2021-05-06 10:24:04,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:24:04,098 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:24:04,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [479072467] [2021-05-06 10:24:04,098 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 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 10:24:04,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:24:04,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-06 10:24:04,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:24:04,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:04,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:04,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:04,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:04,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:04,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:04,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:04,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:04,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:04,554 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 16 proven. 112 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-05-06 10:24:04,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:24:04,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271027002] [2021-05-06 10:24:04,554 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:24:04,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479072467] [2021-05-06 10:24:04,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479072467] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:24:04,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:24:04,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 10:24:04,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082999058] [2021-05-06 10:24:04,555 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 10:24:04,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:24:04,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 10:24:04,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-05-06 10:24:04,555 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 13 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 10:24:04,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:24:04,687 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2021-05-06 10:24:04,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 10:24:04,687 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 74 [2021-05-06 10:24:04,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:24:04,687 INFO L225 Difference]: With dead ends: 82 [2021-05-06 10:24:04,688 INFO L226 Difference]: Without dead ends: 79 [2021-05-06 10:24:04,688 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 97.2ms TimeCoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-05-06 10:24:04,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-06 10:24:04,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-05-06 10:24:04,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 57 states have internal predecessors, (59), 12 states have call successors, (12), 11 states have call predecessors, (12), 9 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 10:24:04,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2021-05-06 10:24:04,690 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 74 [2021-05-06 10:24:04,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:24:04,690 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2021-05-06 10:24:04,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 10:24:04,690 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2021-05-06 10:24:04,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-06 10:24:04,690 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:24:04,691 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:24:04,897 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-06 10:24:04,897 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:24:04,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:24:04,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1451803755, now seen corresponding path program 8 times [2021-05-06 10:24:04,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:24:04,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892080523] [2021-05-06 10:24:04,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:24:04,902 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:24:04,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [213044416] [2021-05-06 10:24:04,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:24:04,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:24:04,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:24:04,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 10:24:04,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:24:04,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:04,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:04,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:04,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:04,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:04,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:04,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:04,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:04,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:05,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:05,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:05,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:05,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:05,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:05,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:05,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:05,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:05,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:05,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:05,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:05,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:05,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:05,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:05,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:05,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:05,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:05,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:05,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:05,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:05,105 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:24:05,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:24:05,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892080523] [2021-05-06 10:24:05,105 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:24:05,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213044416] [2021-05-06 10:24:05,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213044416] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:24:05,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:24:05,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 10:24:05,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624386931] [2021-05-06 10:24:05,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 10:24:05,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:24:05,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 10:24:05,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-06 10:24:05,106 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 11 states have call successors, (11), 11 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 10:24:05,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:24:05,203 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2021-05-06 10:24:05,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 10:24:05,204 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 11 states have call successors, (11), 11 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 76 [2021-05-06 10:24:05,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:24:05,205 INFO L225 Difference]: With dead ends: 85 [2021-05-06 10:24:05,205 INFO L226 Difference]: Without dead ends: 85 [2021-05-06 10:24:05,205 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 84.4ms TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-05-06 10:24:05,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-06 10:24:05,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-05-06 10:24:05,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 62 states have (on average 1.032258064516129) internal successors, (64), 62 states have internal predecessors, (64), 12 states have call successors, (12), 12 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 10:24:05,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2021-05-06 10:24:05,207 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 76 [2021-05-06 10:24:05,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:24:05,207 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2021-05-06 10:24:05,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 11 states have call successors, (11), 11 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 10:24:05,207 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2021-05-06 10:24:05,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-06 10:24:05,208 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:24:05,208 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:24:05,412 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-06 10:24:05,413 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:24:05,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:24:05,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1938494313, now seen corresponding path program 8 times [2021-05-06 10:24:05,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:24:05,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140088467] [2021-05-06 10:24:05,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:24:05,417 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:24:05,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1621420615] [2021-05-06 10:24:05,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:24:05,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:24:05,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:24:05,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-06 10:24:05,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:24:05,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:05,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:05,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:05,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:05,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:05,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:05,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:05,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:05,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:05,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:06,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:06,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:06,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:06,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:06,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:06,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:06,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:06,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:06,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:06,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:06,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:06,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:06,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:06,091 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 18 proven. 144 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-05-06 10:24:06,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:24:06,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140088467] [2021-05-06 10:24:06,091 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:24:06,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621420615] [2021-05-06 10:24:06,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621420615] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:24:06,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:24:06,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 10:24:06,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514170324] [2021-05-06 10:24:06,092 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 10:24:06,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:24:06,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 10:24:06,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-05-06 10:24:06,092 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 10:24:06,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:24:06,254 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2021-05-06 10:24:06,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 10:24:06,255 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 82 [2021-05-06 10:24:06,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:24:06,255 INFO L225 Difference]: With dead ends: 90 [2021-05-06 10:24:06,255 INFO L226 Difference]: Without dead ends: 87 [2021-05-06 10:24:06,255 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 100.4ms TimeCoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-05-06 10:24:06,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-05-06 10:24:06,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-05-06 10:24:06,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 13 states have call successors, (13), 12 states have call predecessors, (13), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 10:24:06,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2021-05-06 10:24:06,257 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 82 [2021-05-06 10:24:06,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:24:06,258 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2021-05-06 10:24:06,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 10:24:06,258 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2021-05-06 10:24:06,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-05-06 10:24:06,258 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:24:06,258 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:24:06,463 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-06 10:24:06,463 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:24:06,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:24:06,464 INFO L82 PathProgramCache]: Analyzing trace with hash -266881524, now seen corresponding path program 9 times [2021-05-06 10:24:06,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:24:06,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783489363] [2021-05-06 10:24:06,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:24:06,469 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:24:06,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [540968445] [2021-05-06 10:24:06,469 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 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 10:24:06,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-06 10:24:06,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:24:06,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 10:24:06,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:24:06,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:06,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:06,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:06,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:06,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:06,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:06,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:06,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:06,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:06,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:06,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:06,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:06,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:06,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:06,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:06,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:06,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:06,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:06,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:06,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:06,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:06,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:06,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:06,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:06,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:06,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:06,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:06,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:06,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:06,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:06,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:06,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:06,733 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 18 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:24:06,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:24:06,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783489363] [2021-05-06 10:24:06,733 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:24:06,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540968445] [2021-05-06 10:24:06,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540968445] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:24:06,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:24:06,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 10:24:06,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879747357] [2021-05-06 10:24:06,734 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 10:24:06,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:24:06,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 10:24:06,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-06 10:24:06,734 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 12 states have call successors, (12), 12 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 10:24:06,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:24:06,850 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2021-05-06 10:24:06,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-06 10:24:06,850 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 12 states have call successors, (12), 12 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 84 [2021-05-06 10:24:06,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:24:06,851 INFO L225 Difference]: With dead ends: 93 [2021-05-06 10:24:06,851 INFO L226 Difference]: Without dead ends: 93 [2021-05-06 10:24:06,851 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 106.4ms TimeCoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2021-05-06 10:24:06,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-06 10:24:06,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-05-06 10:24:06,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 10:24:06,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2021-05-06 10:24:06,853 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 84 [2021-05-06 10:24:06,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:24:06,853 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2021-05-06 10:24:06,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 12 states have call successors, (12), 12 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 10:24:06,853 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2021-05-06 10:24:06,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-06 10:24:06,854 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:24:06,854 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:24:07,058 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:24:07,058 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:24:07,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:24:07,059 INFO L82 PathProgramCache]: Analyzing trace with hash 757893194, now seen corresponding path program 9 times [2021-05-06 10:24:07,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:24:07,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926489945] [2021-05-06 10:24:07,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:24:07,063 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:24:07,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [463361945] [2021-05-06 10:24:07,063 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 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 10:24:07,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-06 10:24:07,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:24:07,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-06 10:24:07,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:24:07,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:07,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:07,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:07,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:07,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:07,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:07,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:07,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:07,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:07,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:07,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:07,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:07,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:07,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:07,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:07,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:07,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:07,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:07,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:07,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:07,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:07,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:07,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:07,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:07,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:24:07,805 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 20 proven. 180 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-05-06 10:24:07,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:24:07,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926489945] [2021-05-06 10:24:07,806 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:24:07,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463361945] [2021-05-06 10:24:07,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463361945] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:24:07,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:24:07,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 10:24:07,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899343252] [2021-05-06 10:24:07,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 10:24:07,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:24:07,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 10:24:07,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-05-06 10:24:07,807 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 12 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 10:24:07,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:24:07,987 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2021-05-06 10:24:07,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 10:24:07,987 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 12 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 90 [2021-05-06 10:24:07,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:24:07,988 INFO L225 Difference]: With dead ends: 98 [2021-05-06 10:24:07,988 INFO L226 Difference]: Without dead ends: 95 [2021-05-06 10:24:07,988 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 117.9ms TimeCoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-05-06 10:24:07,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-05-06 10:24:07,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-05-06 10:24:07,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 14 states have call successors, (14), 13 states have call predecessors, (14), 11 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 10:24:07,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2021-05-06 10:24:07,990 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 90 [2021-05-06 10:24:07,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:24:07,990 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2021-05-06 10:24:07,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 12 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 10:24:07,991 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2021-05-06 10:24:07,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-06 10:24:07,991 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:24:07,991 INFO L523 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:24:08,195 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-05-06 10:24:08,197 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:24:08,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:24:08,197 INFO L82 PathProgramCache]: Analyzing trace with hash -953190739, now seen corresponding path program 10 times [2021-05-06 10:24:08,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:24:08,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197540965] [2021-05-06 10:24:08,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:24:08,201 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:24:08,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [707629448] [2021-05-06 10:24:08,201 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 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 10:24:09,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 10:24:09,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-05-06 10:24:09,074 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 10:24:09,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 10:24:09,118 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 10:24:09,188 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-06 10:24:09,188 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 10:24:09,388 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:24:09,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 10:24:09 BasicIcfg [2021-05-06 10:24:09,426 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 10:24:09,427 INFO L168 Benchmark]: Toolchain (without parser) took 15566.00 ms. Allocated memory was 189.8 MB in the beginning and 274.7 MB in the end (delta: 84.9 MB). Free memory was 156.0 MB in the beginning and 126.6 MB in the end (delta: 29.5 MB). Peak memory consumption was 113.7 MB. Max. memory is 8.0 GB. [2021-05-06 10:24:09,427 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 189.8 MB. Free memory was 172.7 MB in the beginning and 172.6 MB in the end (delta: 106.0 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 10:24:09,427 INFO L168 Benchmark]: CACSL2BoogieTranslator took 129.28 ms. Allocated memory is still 189.8 MB. Free memory was 155.8 MB in the beginning and 146.2 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-06 10:24:09,427 INFO L168 Benchmark]: Boogie Preprocessor took 55.14 ms. Allocated memory is still 189.8 MB. Free memory was 146.2 MB in the beginning and 174.0 MB in the end (delta: -27.8 MB). Peak memory consumption was 4.4 MB. Max. memory is 8.0 GB. [2021-05-06 10:24:09,427 INFO L168 Benchmark]: RCFGBuilder took 185.39 ms. Allocated memory is still 189.8 MB. Free memory was 173.5 MB in the beginning and 159.4 MB in the end (delta: 14.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-06 10:24:09,427 INFO L168 Benchmark]: IcfgTransformer took 20.80 ms. Allocated memory is still 189.8 MB. Free memory was 159.4 MB in the beginning and 158.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 10:24:09,427 INFO L168 Benchmark]: TraceAbstraction took 15171.56 ms. Allocated memory was 189.8 MB in the beginning and 274.7 MB in the end (delta: 84.9 MB). Free memory was 157.8 MB in the beginning and 126.6 MB in the end (delta: 31.2 MB). Peak memory consumption was 115.6 MB. Max. memory is 8.0 GB. [2021-05-06 10:24:09,427 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 189.8 MB. Free memory was 172.7 MB in the beginning and 172.6 MB in the end (delta: 106.0 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 129.28 ms. Allocated memory is still 189.8 MB. Free memory was 155.8 MB in the beginning and 146.2 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 55.14 ms. Allocated memory is still 189.8 MB. Free memory was 146.2 MB in the beginning and 174.0 MB in the end (delta: -27.8 MB). Peak memory consumption was 4.4 MB. Max. memory is 8.0 GB. * RCFGBuilder took 185.39 ms. Allocated memory is still 189.8 MB. Free memory was 173.5 MB in the beginning and 159.4 MB in the end (delta: 14.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * IcfgTransformer took 20.80 ms. Allocated memory is still 189.8 MB. Free memory was 159.4 MB in the beginning and 158.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 15171.56 ms. Allocated memory was 189.8 MB in the beginning and 274.7 MB in the end (delta: 84.9 MB). Free memory was 157.8 MB in the beginning and 126.6 MB in the end (delta: 31.2 MB). Peak memory consumption was 115.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] int counter = 0; VAL [\old(counter)=17, counter=0] [L19] short k; [L20] long long y, x, c; [L21] k = __VERIFIER_nondet_short() [L23] y = 0 [L24] x = 0 [L25] c = 0 VAL [\old(counter)=0, c=0, counter=0, k=11, x=0, y=0] [L27] EXPR counter++ VAL [\old(counter)=0, c=0, counter=1, counter++=0, k=11, x=0, y=0] [L27] COND TRUE counter++<10 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=0, counter=1, k=11, x=0, y=0] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=1, counter=1, k=11, x=1, y=1] [L27] EXPR counter++ VAL [\old(counter)=0, c=1, counter=2, counter++=1, k=11, x=1, y=1] [L27] COND TRUE counter++<10 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=1, counter=2, k=11, x=1, y=1] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=2, counter=2, k=11, x=9, y=2] [L27] EXPR counter++ VAL [\old(counter)=0, c=2, counter=3, counter++=2, k=11, x=9, y=2] [L27] COND TRUE counter++<10 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=2, counter=3, k=11, x=9, y=2] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=3, counter=3, k=11, x=36, y=3] [L27] EXPR counter++ VAL [\old(counter)=0, c=3, counter=4, counter++=3, k=11, x=36, y=3] [L27] COND TRUE counter++<10 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=3, counter=4, k=11, x=36, y=3] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=4, counter=4, k=11, x=100, y=4] [L27] EXPR counter++ VAL [\old(counter)=0, c=4, counter=5, counter++=4, k=11, x=100, y=4] [L27] COND TRUE counter++<10 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=4, counter=5, k=11, x=100, y=4] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=5, counter=5, k=11, x=225, y=5] [L27] EXPR counter++ VAL [\old(counter)=0, c=5, counter=6, counter++=5, k=11, x=225, y=5] [L27] COND TRUE counter++<10 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=6] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=6] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=5, counter=6, k=11, x=225, y=5] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=6, counter=6, k=11, x=441, y=6] [L27] EXPR counter++ VAL [\old(counter)=0, c=6, counter=7, counter++=6, k=11, x=441, y=6] [L27] COND TRUE counter++<10 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=7] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=7] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=6, counter=7, k=11, x=441, y=6] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=7, counter=7, k=11, x=784, y=7] [L27] EXPR counter++ VAL [\old(counter)=0, c=7, counter=8, counter++=7, k=11, x=784, y=7] [L27] COND TRUE counter++<10 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=8] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=8] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=7, counter=8, k=11, x=784, y=7] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=8, counter=8, k=11, x=1296, y=8] [L27] EXPR counter++ VAL [\old(counter)=0, c=8, counter=9, counter++=8, k=11, x=1296, y=8] [L27] COND TRUE counter++<10 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=8, counter=9, k=11, x=1296, y=8] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=9, counter=9, k=11, x=2025, y=9] [L27] EXPR counter++ VAL [\old(counter)=0, c=9, counter=10, counter++=9, k=11, x=2025, y=9] [L27] COND TRUE counter++<10 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=10] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=10] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=9, counter=10, k=11, x=2025, y=9] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=10, counter=10, k=11, x=3025, y=10] [L27] EXPR counter++ VAL [\old(counter)=0, c=10, counter=11, counter++=10, k=11, x=3025, y=10] [L27] COND FALSE !(counter++<10) [L37] CALL __VERIFIER_assert(k*y - (y*y) == 0) VAL [\old(cond)=0, \old(counter)=0, counter=11] [L10] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=11] [L12] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=11] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 15087.7ms, OverallIterations: 25, TraceHistogramMax: 11, EmptinessCheckTime: 17.9ms, AutomataDifference: 1951.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 657 SDtfs, 127 SDslu, 3521 SDs, 0 SdLazy, 1841 SolverSat, 89 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1068.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1150 GetRequests, 905 SyntacticMatches, 2 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 2313.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=95occurred in iteration=24, InterpolantAutomatonStates: 263, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 85.6ms AutomataMinimizationTime, 24 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 207.5ms SsaConstructionTime, 2811.8ms SatisfiabilityAnalysisTime, 3912.1ms InterpolantComputationTime, 1201 NumberOfCodeBlocks, 1185 NumberOfCodeBlocksAsserted, 80 NumberOfCheckSat, 1085 ConstructedInterpolants, 0 QuantifiedInterpolants, 4197 SizeOfPredicates, 84 NumberOfNonLiveVariables, 4479 ConjunctsInSsa, 468 ConjunctsInUnsatCore, 24 InterpolantComputations, 3 PerfectInterpolantSequences, 902/2630 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...