/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/hard-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:53:15,198 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:53:15,201 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:53:15,238 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 08:53:15,238 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 08:53:15,241 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 08:53:15,243 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 08:53:15,248 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 08:53:15,250 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 08:53:15,255 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 08:53:15,255 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 08:53:15,257 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 08:53:15,257 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:53:15,259 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:53:15,260 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:53:15,261 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:53:15,263 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:53:15,264 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:53:15,266 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:53:15,271 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:53:15,272 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:53:15,273 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:53:15,274 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:53:15,275 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:53:15,281 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 08:53:15,290 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:53:15,291 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:53:15,292 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:53:15,296 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:53:15,311 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:53:15,311 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:53:15,314 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:53:15,314 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:53:15,314 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:53:15,314 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:53:15,314 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:53:15,315 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:53:15,315 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:53:15,315 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:53:15,316 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:53:15,316 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:53:15,316 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:53:15,316 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:53:15,317 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:53:15,317 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:53:15,317 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:53:15,317 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:53:15,317 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:53:15,317 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:53:15,318 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:53:15,319 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:53:15,319 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:53:15,664 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:53:15,681 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:53:15,684 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:53:15,685 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:53:15,685 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:53:15,686 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound20.c [2021-05-06 08:53:15,738 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5ed287f1/808dd7bf40e749a5a6c8f72ac327af52/FLAGe68eb1669 [2021-05-06 08:53:16,076 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:53:16,077 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound20.c [2021-05-06 08:53:16,082 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5ed287f1/808dd7bf40e749a5a6c8f72ac327af52/FLAGe68eb1669 [2021-05-06 08:53:16,498 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5ed287f1/808dd7bf40e749a5a6c8f72ac327af52 [2021-05-06 08:53:16,500 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:53:16,502 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:53:16,507 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:53:16,507 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:53:16,511 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:53:16,511 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:53:16" (1/1) ... [2021-05-06 08:53:16,512 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29cedf03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:53:16, skipping insertion in model container [2021-05-06 08:53:16,512 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:53:16" (1/1) ... [2021-05-06 08:53:16,518 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:53:16,533 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:53:16,629 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/hard-ll_valuebound20.c[546,559] [2021-05-06 08:53:16,642 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:53:16,647 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:53:16,658 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/hard-ll_valuebound20.c[546,559] [2021-05-06 08:53:16,664 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:53:16,675 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:53:16,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:53:16 WrapperNode [2021-05-06 08:53:16,676 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:53:16,676 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:53:16,677 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:53:16,677 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:53:16,716 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:53:16" (1/1) ... [2021-05-06 08:53:16,716 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:53:16" (1/1) ... [2021-05-06 08:53:16,730 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:53:16" (1/1) ... [2021-05-06 08:53:16,731 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:53:16" (1/1) ... [2021-05-06 08:53:16,735 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:53:16" (1/1) ... [2021-05-06 08:53:16,738 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:53:16" (1/1) ... [2021-05-06 08:53:16,739 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:53:16" (1/1) ... [2021-05-06 08:53:16,741 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:53:16,742 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:53:16,742 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:53:16,742 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:53:16,744 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:53:16" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:53:16,814 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:53:16,814 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:53:16,814 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:53:16,814 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:53:16,814 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:53:16,815 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:53:16,815 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:53:16,815 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:53:16,815 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:53:16,816 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:53:16,816 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 08:53:16,816 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:53:16,816 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:53:16,816 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:53:16,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:53:16,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:53:16,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:53:16,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:53:16,818 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:53:16,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:53:17,125 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:53:17,125 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 08:53:17,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:53:17 BoogieIcfgContainer [2021-05-06 08:53:17,141 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:53:17,142 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:53:17,142 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:53:17,142 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:53:17,149 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:53:17" (1/1) ... [2021-05-06 08:53:17,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:53:17 BasicIcfg [2021-05-06 08:53:17,163 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:53:17,164 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:53:17,164 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:53:17,166 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:53:17,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:53:16" (1/4) ... [2021-05-06 08:53:17,167 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44e2d387 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:53:17, skipping insertion in model container [2021-05-06 08:53:17,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:53:16" (2/4) ... [2021-05-06 08:53:17,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44e2d387 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:53:17, skipping insertion in model container [2021-05-06 08:53:17,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:53:17" (3/4) ... [2021-05-06 08:53:17,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44e2d387 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:53:17, skipping insertion in model container [2021-05-06 08:53:17,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:53:17" (4/4) ... [2021-05-06 08:53:17,169 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound20.cJordan [2021-05-06 08:53:17,173 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:53:17,177 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:53:17,190 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:53:17,206 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:53:17,206 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:53:17,206 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:53:17,206 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:53:17,206 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:53:17,206 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:53:17,206 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:53:17,206 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:53:17,218 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 08:53:17,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 08:53:17,224 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:53:17,225 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:53:17,225 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:53:17,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:53:17,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1011787902, now seen corresponding path program 1 times [2021-05-06 08:53:17,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:53:17,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033551693] [2021-05-06 08:53:17,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:53:17,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:53:17,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:53:17,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:53:17,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:53:17,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:53:17,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 08:53:17,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:53:17,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 08:53:17,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:53:17,532 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:53:17,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:53:17,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033551693] [2021-05-06 08:53:17,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033551693] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:53:17,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:53:17,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 08:53:17,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078023203] [2021-05-06 08:53:17,539 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 08:53:17,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:53:17,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 08:53:17,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:53:17,552 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 08:53:17,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:53:17,696 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-06 08:53:17,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 08:53:17,698 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-06 08:53:17,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:53:17,716 INFO L225 Difference]: With dead ends: 38 [2021-05-06 08:53:17,716 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 08:53:17,717 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 56.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:53:17,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 08:53:17,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-06 08:53:17,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 08:53:17,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-05-06 08:53:17,755 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2021-05-06 08:53:17,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:53:17,756 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-05-06 08:53:17,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 08:53:17,756 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-05-06 08:53:17,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 08:53:17,758 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:53:17,758 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:53:17,758 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 08:53:17,758 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:53:17,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:53:17,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1710049411, now seen corresponding path program 1 times [2021-05-06 08:53:17,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:53:17,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550306251] [2021-05-06 08:53:17,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:53:17,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:53:17,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:53:17,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:53:17,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:53:17,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:53:17,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 08:53:17,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:53:17,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 08:53:17,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:53:17,946 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:53:17,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:53:17,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550306251] [2021-05-06 08:53:17,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550306251] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:53:17,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:53:17,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 08:53:17,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090882336] [2021-05-06 08:53:17,948 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:53:17,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:53:17,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:53:17,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:53:17,949 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 08:53:18,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:53:18,366 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2021-05-06 08:53:18,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:53:18,367 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2021-05-06 08:53:18,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:53:18,368 INFO L225 Difference]: With dead ends: 44 [2021-05-06 08:53:18,368 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 08:53:18,369 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 201.2ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:53:18,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 08:53:18,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-06 08:53:18,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 08:53:18,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-06 08:53:18,389 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2021-05-06 08:53:18,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:53:18,390 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-06 08:53:18,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 08:53:18,391 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-06 08:53:18,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 08:53:18,392 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:53:18,392 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:53:18,392 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 08:53:18,392 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:53:18,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:53:18,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1042498848, now seen corresponding path program 1 times [2021-05-06 08:53:18,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:53:18,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346260677] [2021-05-06 08:53:18,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:53:18,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:53:18,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:53:18,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:53:18,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:53:18,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:53:18,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 08:53:18,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:53:18,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 08:53:18,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:53:18,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-06 08:53:18,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:53:18,537 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:53:18,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:53:18,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346260677] [2021-05-06 08:53:18,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346260677] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:53:18,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:53:18,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 08:53:18,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892291202] [2021-05-06 08:53:18,538 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:53:18,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:53:18,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:53:18,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:53:18,542 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:53:18,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:53:18,853 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2021-05-06 08:53:18,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:53:18,854 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-06 08:53:18,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:53:18,855 INFO L225 Difference]: With dead ends: 48 [2021-05-06 08:53:18,855 INFO L226 Difference]: Without dead ends: 48 [2021-05-06 08:53:18,855 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 153.9ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:53:18,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-06 08:53:18,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2021-05-06 08:53:18,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 08:53:18,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-05-06 08:53:18,870 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2021-05-06 08:53:18,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:53:18,870 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-05-06 08:53:18,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:53:18,871 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-05-06 08:53:18,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 08:53:18,872 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:53:18,872 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:53:18,872 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 08:53:18,872 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:53:18,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:53:18,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1436069466, now seen corresponding path program 1 times [2021-05-06 08:53:18,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:53:18,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407011388] [2021-05-06 08:53:18,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:53:18,884 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:53:18,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [986567323] [2021-05-06 08:53:18,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:53:18,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:53:18,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:53:18,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:53:19,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:19,205 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 08:53:19,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:53:19,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407011388] [2021-05-06 08:53:19,206 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:53:19,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986567323] [2021-05-06 08:53:19,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986567323] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:53:19,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:53:19,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:53:19,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272508508] [2021-05-06 08:53:19,207 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:53:19,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:53:19,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:53:19,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:53:19,209 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 08:53:19,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:53:19,272 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2021-05-06 08:53:19,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:53:19,273 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2021-05-06 08:53:19,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:53:19,275 INFO L225 Difference]: With dead ends: 56 [2021-05-06 08:53:19,275 INFO L226 Difference]: Without dead ends: 55 [2021-05-06 08:53:19,275 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:53:19,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-06 08:53:19,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-06 08:53:19,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 08:53:19,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2021-05-06 08:53:19,288 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 38 [2021-05-06 08:53:19,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:53:19,289 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2021-05-06 08:53:19,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 08:53:19,290 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2021-05-06 08:53:19,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-06 08:53:19,292 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:53:19,292 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:53:19,492 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:53:19,493 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:53:19,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:53:19,493 INFO L82 PathProgramCache]: Analyzing trace with hash 5711864, now seen corresponding path program 1 times [2021-05-06 08:53:19,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:53:19,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669504375] [2021-05-06 08:53:19,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:53:19,503 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:53:19,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1491238069] [2021-05-06 08:53:19,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:53:19,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:53:19,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:53:19,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:53:19,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:19,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:19,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:19,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:19,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:19,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:19,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:19,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:19,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:19,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:19,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:19,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:19,887 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-06 08:53:19,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:53:19,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669504375] [2021-05-06 08:53:19,892 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:53:19,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491238069] [2021-05-06 08:53:19,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491238069] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:53:19,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:53:19,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:53:19,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668825570] [2021-05-06 08:53:19,893 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:53:19,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:53:19,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:53:19,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:53:19,895 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:53:20,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:53:20,043 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2021-05-06 08:53:20,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:53:20,043 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2021-05-06 08:53:20,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:53:20,047 INFO L225 Difference]: With dead ends: 67 [2021-05-06 08:53:20,047 INFO L226 Difference]: Without dead ends: 58 [2021-05-06 08:53:20,048 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 77.9ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:53:20,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-06 08:53:20,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-06 08:53:20,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 35 states have internal predecessors, (38), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 08:53:20,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2021-05-06 08:53:20,057 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 45 [2021-05-06 08:53:20,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:53:20,058 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2021-05-06 08:53:20,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:53:20,058 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2021-05-06 08:53:20,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-06 08:53:20,061 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:53:20,061 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:53:20,277 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:53:20,277 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:53:20,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:53:20,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1597443315, now seen corresponding path program 1 times [2021-05-06 08:53:20,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:53:20,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188477953] [2021-05-06 08:53:20,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:53:20,284 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:53:20,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [480342010] [2021-05-06 08:53:20,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:53:20,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:53:20,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-06 08:53:20,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:53:20,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:20,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:20,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:20,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:20,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:20,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:20,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:20,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:20,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:20,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:20,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:20,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:20,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:20,576 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-05-06 08:53:20,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:53:20,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188477953] [2021-05-06 08:53:20,577 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:53:20,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480342010] [2021-05-06 08:53:20,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480342010] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:53:20,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:53:20,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:53:20,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020346101] [2021-05-06 08:53:20,578 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:53:20,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:53:20,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:53:20,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:53:20,580 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:53:20,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:53:20,764 INFO L93 Difference]: Finished difference Result 78 states and 95 transitions. [2021-05-06 08:53:20,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:53:20,767 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 55 [2021-05-06 08:53:20,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:53:20,767 INFO L225 Difference]: With dead ends: 78 [2021-05-06 08:53:20,767 INFO L226 Difference]: Without dead ends: 77 [2021-05-06 08:53:20,768 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 58.9ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:53:20,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-06 08:53:20,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-05-06 08:53:20,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 46 states have internal predecessors, (50), 23 states have call successors, (23), 10 states have call predecessors, (23), 9 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-06 08:53:20,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 93 transitions. [2021-05-06 08:53:20,774 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 93 transitions. Word has length 55 [2021-05-06 08:53:20,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:53:20,775 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 93 transitions. [2021-05-06 08:53:20,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:53:20,775 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 93 transitions. [2021-05-06 08:53:20,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-06 08:53:20,776 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:53:20,776 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:53:20,987 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:53:20,988 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:53:20,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:53:20,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1292294975, now seen corresponding path program 1 times [2021-05-06 08:53:20,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:53:20,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73501390] [2021-05-06 08:53:20,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:53:20,997 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:53:20,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [200214222] [2021-05-06 08:53:20,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:53:21,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:53:21,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 08:53:21,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:53:21,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:21,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:21,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:21,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:21,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:21,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:21,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:21,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:21,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:21,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:21,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:21,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:21,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:21,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:21,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:21,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:21,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:21,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:21,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:21,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:21,428 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-05-06 08:53:21,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:53:21,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73501390] [2021-05-06 08:53:21,430 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:53:21,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200214222] [2021-05-06 08:53:21,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200214222] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:53:21,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:53:21,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:53:21,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894627792] [2021-05-06 08:53:21,431 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:53:21,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:53:21,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:53:21,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:53:21,432 INFO L87 Difference]: Start difference. First operand 77 states and 93 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 08:53:21,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:53:21,646 INFO L93 Difference]: Finished difference Result 94 states and 109 transitions. [2021-05-06 08:53:21,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:53:21,646 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 62 [2021-05-06 08:53:21,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:53:21,649 INFO L225 Difference]: With dead ends: 94 [2021-05-06 08:53:21,649 INFO L226 Difference]: Without dead ends: 89 [2021-05-06 08:53:21,649 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 108.5ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:53:21,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-06 08:53:21,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-05-06 08:53:21,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 55 states have internal predecessors, (58), 23 states have call successors, (23), 13 states have call predecessors, (23), 12 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-06 08:53:21,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2021-05-06 08:53:21,665 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 62 [2021-05-06 08:53:21,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:53:21,666 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2021-05-06 08:53:21,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 08:53:21,667 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2021-05-06 08:53:21,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-06 08:53:21,670 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:53:21,670 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:53:21,884 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:53:21,885 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:53:21,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:53:21,885 INFO L82 PathProgramCache]: Analyzing trace with hash 294687610, now seen corresponding path program 2 times [2021-05-06 08:53:21,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:53:21,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172736941] [2021-05-06 08:53:21,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:53:21,899 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:53:21,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [574303068] [2021-05-06 08:53:21,899 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:53:21,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:53:21,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:53:21,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-06 08:53:21,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:53:22,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:22,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:22,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:22,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:22,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:22,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:22,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:22,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:22,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:22,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:22,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:22,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:22,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:22,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:22,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:22,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:22,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:22,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:22,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:22,210 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-05-06 08:53:22,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:53:22,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172736941] [2021-05-06 08:53:22,210 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:53:22,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574303068] [2021-05-06 08:53:22,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574303068] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:53:22,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:53:22,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:53:22,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477566910] [2021-05-06 08:53:22,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:53:22,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:53:22,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:53:22,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:53:22,212 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 08:53:22,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:53:22,449 INFO L93 Difference]: Finished difference Result 114 states and 138 transitions. [2021-05-06 08:53:22,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:53:22,450 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 72 [2021-05-06 08:53:22,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:53:22,451 INFO L225 Difference]: With dead ends: 114 [2021-05-06 08:53:22,451 INFO L226 Difference]: Without dead ends: 113 [2021-05-06 08:53:22,451 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 71.6ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:53:22,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-05-06 08:53:22,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2021-05-06 08:53:22,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 65 states have (on average 1.123076923076923) internal successors, (73), 68 states have internal predecessors, (73), 32 states have call successors, (32), 14 states have call predecessors, (32), 13 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-06 08:53:22,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 134 transitions. [2021-05-06 08:53:22,457 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 134 transitions. Word has length 72 [2021-05-06 08:53:22,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:53:22,457 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 134 transitions. [2021-05-06 08:53:22,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 08:53:22,458 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 134 transitions. [2021-05-06 08:53:22,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-06 08:53:22,458 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:53:22,459 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:53:22,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:53:22,673 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:53:22,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:53:22,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1689231171, now seen corresponding path program 1 times [2021-05-06 08:53:22,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:53:22,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762768990] [2021-05-06 08:53:22,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:53:22,682 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:53:22,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2030403578] [2021-05-06 08:53:22,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:53:22,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:53:22,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-06 08:53:22,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:53:22,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:22,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:22,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:22,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:22,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:22,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:22,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:22,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:22,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:22,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:22,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:22,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:22,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:22,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:23,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:23,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:23,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:23,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:23,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:23,228 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 42 proven. 8 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-05-06 08:53:23,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:53:23,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762768990] [2021-05-06 08:53:23,229 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:53:23,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030403578] [2021-05-06 08:53:23,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030403578] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:53:23,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:53:23,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 08:53:23,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567104658] [2021-05-06 08:53:23,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 08:53:23,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:53:23,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 08:53:23,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:53:23,230 INFO L87 Difference]: Start difference. First operand 111 states and 134 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 08:53:23,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:53:23,519 INFO L93 Difference]: Finished difference Result 121 states and 142 transitions. [2021-05-06 08:53:23,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:53:23,520 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 75 [2021-05-06 08:53:23,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:53:23,521 INFO L225 Difference]: With dead ends: 121 [2021-05-06 08:53:23,521 INFO L226 Difference]: Without dead ends: 121 [2021-05-06 08:53:23,521 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 206.4ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:53:23,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-05-06 08:53:23,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2021-05-06 08:53:23,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 71 states have (on average 1.1126760563380282) internal successors, (79), 74 states have internal predecessors, (79), 32 states have call successors, (32), 16 states have call predecessors, (32), 15 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-06 08:53:23,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 140 transitions. [2021-05-06 08:53:23,527 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 140 transitions. Word has length 75 [2021-05-06 08:53:23,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:53:23,527 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 140 transitions. [2021-05-06 08:53:23,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 08:53:23,527 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 140 transitions. [2021-05-06 08:53:23,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 08:53:23,528 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:53:23,528 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:53:23,744 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:53:23,745 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:53:23,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:53:23,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1714864424, now seen corresponding path program 2 times [2021-05-06 08:53:23,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:53:23,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082517657] [2021-05-06 08:53:23,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:53:23,760 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:53:23,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [311259260] [2021-05-06 08:53:23,760 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 08:53:23,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:53:23,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:53:23,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 08:53:23,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:53:23,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:23,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:23,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:23,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:23,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:23,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:23,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:23,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:23,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:23,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:23,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:23,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:23,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:23,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:23,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:23,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:23,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:23,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:24,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:24,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:24,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:24,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:24,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:24,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:24,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:24,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:24,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:24,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:24,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:24,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:24,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:24,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:24,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:24,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:24,362 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 21 proven. 18 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-05-06 08:53:24,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:53:24,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082517657] [2021-05-06 08:53:24,363 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:53:24,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311259260] [2021-05-06 08:53:24,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311259260] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:53:24,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:53:24,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:53:24,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732478614] [2021-05-06 08:53:24,364 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:53:24,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:53:24,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:53:24,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:53:24,364 INFO L87 Difference]: Start difference. First operand 119 states and 140 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 08:53:24,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:53:24,843 INFO L93 Difference]: Finished difference Result 141 states and 164 transitions. [2021-05-06 08:53:24,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:53:24,844 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 79 [2021-05-06 08:53:24,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:53:24,846 INFO L225 Difference]: With dead ends: 141 [2021-05-06 08:53:24,846 INFO L226 Difference]: Without dead ends: 136 [2021-05-06 08:53:24,846 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 327.5ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:53:24,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-05-06 08:53:24,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2021-05-06 08:53:24,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 83 states have (on average 1.0963855421686748) internal successors, (91), 86 states have internal predecessors, (91), 34 states have call successors, (34), 19 states have call predecessors, (34), 18 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 08:53:24,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 156 transitions. [2021-05-06 08:53:24,852 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 156 transitions. Word has length 79 [2021-05-06 08:53:24,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:53:24,852 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 156 transitions. [2021-05-06 08:53:24,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 08:53:24,852 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 156 transitions. [2021-05-06 08:53:24,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-06 08:53:24,853 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:53:24,853 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:53:25,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 08:53:25,073 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:53:25,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:53:25,073 INFO L82 PathProgramCache]: Analyzing trace with hash -102783885, now seen corresponding path program 1 times [2021-05-06 08:53:25,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:53:25,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896962771] [2021-05-06 08:53:25,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:53:25,082 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:53:25,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1218708574] [2021-05-06 08:53:25,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:53:25,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:53:25,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 08:53:25,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:53:25,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:25,318 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2021-05-06 08:53:25,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:53:25,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896962771] [2021-05-06 08:53:25,319 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:53:25,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218708574] [2021-05-06 08:53:25,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218708574] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:53:25,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:53:25,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:53:25,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492410456] [2021-05-06 08:53:25,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:53:25,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:53:25,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:53:25,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:53:25,320 INFO L87 Difference]: Start difference. First operand 136 states and 156 transitions. Second operand has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 08:53:25,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:53:25,423 INFO L93 Difference]: Finished difference Result 158 states and 188 transitions. [2021-05-06 08:53:25,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:53:25,423 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 86 [2021-05-06 08:53:25,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:53:25,425 INFO L225 Difference]: With dead ends: 158 [2021-05-06 08:53:25,425 INFO L226 Difference]: Without dead ends: 135 [2021-05-06 08:53:25,426 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 45.2ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:53:25,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-05-06 08:53:25,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 132. [2021-05-06 08:53:25,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 79 states have (on average 1.1265822784810127) internal successors, (89), 83 states have internal predecessors, (89), 36 states have call successors, (36), 17 states have call predecessors, (36), 16 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 08:53:25,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 157 transitions. [2021-05-06 08:53:25,433 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 157 transitions. Word has length 86 [2021-05-06 08:53:25,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:53:25,433 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 157 transitions. [2021-05-06 08:53:25,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 08:53:25,433 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 157 transitions. [2021-05-06 08:53:25,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-06 08:53:25,435 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:53:25,435 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:53:25,659 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-06 08:53:25,659 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:53:25,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:53:25,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1101138899, now seen corresponding path program 3 times [2021-05-06 08:53:25,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:53:25,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844437627] [2021-05-06 08:53:25,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:53:25,667 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:53:25,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2139653799] [2021-05-06 08:53:25,667 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 08:53:25,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:53:25,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:53:25,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 08:53:25,741 INFO L286 TraceCheckSpWp]: Computing forward predicates...