/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_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:52:32,139 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:52:32,142 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:52:32,177 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:52:32,178 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:52:32,181 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:52:32,183 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:52:32,188 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:52:32,191 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:52:32,195 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:52:32,196 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:52:32,197 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:52:32,197 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:52:32,199 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:52:32,201 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:52:32,202 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:52:32,205 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:52:32,206 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:52:32,208 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:52:32,213 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:52:32,215 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:52:32,216 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:52:32,217 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:52:32,219 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:52:32,225 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:52:32,234 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:52:32,243 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:52:32,244 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:52:32,252 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:52:32,268 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:52:32,268 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:52:32,271 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:52:32,271 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:52:32,271 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:52:32,271 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:52:32,272 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:52:32,272 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:52:32,272 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:52:32,272 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:52:32,273 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:52:32,273 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:52:32,273 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:52:32,273 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:52:32,274 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:52:32,274 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:52:32,274 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:52:32,274 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:52:32,274 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:52:32,274 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:52:32,274 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:52:32,275 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:52:32,276 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:52:32,595 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:52:32,622 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:52:32,625 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:52:32,626 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:52:32,629 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:52:32,629 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound100.c [2021-05-02 20:52:32,688 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8894d9c5/fa241d871c7b4b01acb22ad8ce8972d9/FLAG88c837a24 [2021-05-02 20:52:33,060 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:52:33,061 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound100.c [2021-05-02 20:52:33,066 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8894d9c5/fa241d871c7b4b01acb22ad8ce8972d9/FLAG88c837a24 [2021-05-02 20:52:33,078 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8894d9c5/fa241d871c7b4b01acb22ad8ce8972d9 [2021-05-02 20:52:33,080 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:52:33,082 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:52:33,085 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:52:33,086 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:52:33,090 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:52:33,090 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:52:33" (1/1) ... [2021-05-02 20:52:33,091 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37ce164d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:33, skipping insertion in model container [2021-05-02 20:52:33,091 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:52:33" (1/1) ... [2021-05-02 20:52:33,097 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:52:33,113 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:52:33,219 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_unwindbound100.c[546,559] [2021-05-02 20:52:33,232 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:52:33,239 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:52:33,280 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_unwindbound100.c[546,559] [2021-05-02 20:52:33,296 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:52:33,313 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:52:33,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:33 WrapperNode [2021-05-02 20:52:33,314 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:52:33,316 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:52:33,316 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:52:33,317 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:52:33,327 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:33" (1/1) ... [2021-05-02 20:52:33,327 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:33" (1/1) ... [2021-05-02 20:52:33,340 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:33" (1/1) ... [2021-05-02 20:52:33,340 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:33" (1/1) ... [2021-05-02 20:52:33,351 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:33" (1/1) ... [2021-05-02 20:52:33,355 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:33" (1/1) ... [2021-05-02 20:52:33,356 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:33" (1/1) ... [2021-05-02 20:52:33,358 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:52:33,359 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:52:33,359 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:52:33,359 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:52:33,359 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:33" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:52:33,439 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:52:33,439 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:52:33,439 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:52:33,439 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:52:33,440 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:52:33,440 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:52:33,440 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:52:33,440 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:52:33,440 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:52:33,441 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:52:33,441 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 20:52:33,441 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:52:33,441 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:52:33,442 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:52:33,442 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:52:33,442 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:52:33,442 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:52:33,442 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:52:33,443 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:52:33,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:52:33,777 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:52:33,777 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 20:52:33,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:52:33 BoogieIcfgContainer [2021-05-02 20:52:33,779 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:52:33,779 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:52:33,780 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:52:33,785 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:52:33,788 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:52:33" (1/1) ... [2021-05-02 20:52:33,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:52:33 BasicIcfg [2021-05-02 20:52:33,807 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:52:33,809 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:52:33,809 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:52:33,812 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:52:33,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:52:33" (1/4) ... [2021-05-02 20:52:33,813 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59f45604 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:52:33, skipping insertion in model container [2021-05-02 20:52:33,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:33" (2/4) ... [2021-05-02 20:52:33,814 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59f45604 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:52:33, skipping insertion in model container [2021-05-02 20:52:33,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:52:33" (3/4) ... [2021-05-02 20:52:33,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59f45604 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:52:33, skipping insertion in model container [2021-05-02 20:52:33,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:52:33" (4/4) ... [2021-05-02 20:52:33,818 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_unwindbound100.cJordan [2021-05-02 20:52:33,825 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:52:33,829 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:52:33,842 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:52:33,857 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:52:33,858 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:52:33,858 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:52:33,858 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:52:33,858 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:52:33,858 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:52:33,858 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:52:33,858 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:52:33,869 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 20:52:33,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 20:52:33,876 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:33,876 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:33,877 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:33,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:33,882 INFO L82 PathProgramCache]: Analyzing trace with hash 79654685, now seen corresponding path program 1 times [2021-05-02 20:52:33,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:33,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558971547] [2021-05-02 20:52:33,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:34,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:34,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:52:34,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:34,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:52:34,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:34,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:52:34,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:34,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558971547] [2021-05-02 20:52:34,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558971547] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:52:34,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:52:34,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:52:34,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143166832] [2021-05-02 20:52:34,176 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:52:34,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:34,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:52:34,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:52:34,193 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 20:52:34,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:34,363 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-02 20:52:34,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:52:34,366 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-02 20:52:34,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:34,372 INFO L225 Difference]: With dead ends: 38 [2021-05-02 20:52:34,372 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 20:52:34,374 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:52:34,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 20:52:34,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-05-02 20:52:34,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:52:34,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-02 20:52:34,424 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2021-05-02 20:52:34,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:34,424 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-02 20:52:34,424 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 20:52:34,425 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-02 20:52:34,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 20:52:34,425 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:34,426 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:34,426 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:52:34,426 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:34,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:34,427 INFO L82 PathProgramCache]: Analyzing trace with hash -85369733, now seen corresponding path program 1 times [2021-05-02 20:52:34,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:34,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884608941] [2021-05-02 20:52:34,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:34,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:34,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:52:34,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:34,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:52:34,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:34,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:52:34,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:34,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884608941] [2021-05-02 20:52:34,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884608941] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:52:34,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:52:34,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 20:52:34,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864777927] [2021-05-02 20:52:34,581 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:52:34,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:34,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:52:34,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:52:34,582 INFO L87 Difference]: Start difference. First operand 32 states and 42 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 20:52:35,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:35,009 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2021-05-02 20:52:35,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:52:35,009 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-02 20:52:35,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:35,010 INFO L225 Difference]: With dead ends: 45 [2021-05-02 20:52:35,011 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 20:52:35,011 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 237.5ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:52:35,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 20:52:35,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2021-05-02 20:52:35,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:52:35,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2021-05-02 20:52:35,019 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2021-05-02 20:52:35,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:35,020 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2021-05-02 20:52:35,020 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 20:52:35,020 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2021-05-02 20:52:35,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 20:52:35,021 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:35,021 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:35,021 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 20:52:35,021 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:35,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:35,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1527809342, now seen corresponding path program 1 times [2021-05-02 20:52:35,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:35,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664656941] [2021-05-02 20:52:35,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:35,035 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:35,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1908506300] [2021-05-02 20:52:35,035 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 [2021-05-02 20:52:35,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:35,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:52:35,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:35,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:35,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:35,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:35,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:35,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:35,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:52:35,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:35,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664656941] [2021-05-02 20:52:35,291 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:35,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908506300] [2021-05-02 20:52:35,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908506300] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:52:35,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:52:35,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 20:52:35,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474038596] [2021-05-02 20:52:35,293 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 20:52:35,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:35,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 20:52:35,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:52:35,295 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 20:52:35,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:35,315 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2021-05-02 20:52:35,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 20:52:35,316 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-02 20:52:35,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:35,318 INFO L225 Difference]: With dead ends: 38 [2021-05-02 20:52:35,318 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 20:52:35,319 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:52:35,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 20:52:35,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-02 20:52:35,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:52:35,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2021-05-02 20:52:35,335 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2021-05-02 20:52:35,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:35,335 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2021-05-02 20:52:35,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 20:52:35,336 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2021-05-02 20:52:35,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 20:52:35,337 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:35,337 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:35,549 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 20:52:35,549 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:35,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:35,550 INFO L82 PathProgramCache]: Analyzing trace with hash 2128444854, now seen corresponding path program 1 times [2021-05-02 20:52:35,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:35,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853020660] [2021-05-02 20:52:35,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:35,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:35,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:52:35,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:35,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:52:35,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:35,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 20:52:35,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:35,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:52:35,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:35,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853020660] [2021-05-02 20:52:35,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853020660] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:52:35,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:52:35,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 20:52:35,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326517338] [2021-05-02 20:52:35,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:52:35,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:35,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:52:35,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:52:35,650 INFO L87 Difference]: Start difference. First operand 38 states and 47 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:52:35,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:35,941 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2021-05-02 20:52:35,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:52:35,942 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 20:52:35,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:35,945 INFO L225 Difference]: With dead ends: 50 [2021-05-02 20:52:35,945 INFO L226 Difference]: Without dead ends: 50 [2021-05-02 20:52:35,945 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 173.7ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:52:35,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-02 20:52:35,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2021-05-02 20:52:35,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:52:35,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2021-05-02 20:52:35,955 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2021-05-02 20:52:35,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:35,955 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2021-05-02 20:52:35,955 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:52:35,956 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2021-05-02 20:52:35,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 20:52:35,957 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:35,957 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:35,957 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 20:52:35,957 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:35,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:35,958 INFO L82 PathProgramCache]: Analyzing trace with hash 135546551, now seen corresponding path program 1 times [2021-05-02 20:52:35,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:35,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198948033] [2021-05-02 20:52:35,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:35,990 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:35,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [492213427] [2021-05-02 20:52:35,991 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 [2021-05-02 20:52:36,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:36,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 20:52:36,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:36,179 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:52:36,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:36,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198948033] [2021-05-02 20:52:36,179 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:36,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492213427] [2021-05-02 20:52:36,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492213427] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:36,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:36,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:52:36,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294568028] [2021-05-02 20:52:36,180 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:52:36,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:36,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:52:36,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:52:36,181 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:52:36,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:36,341 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2021-05-02 20:52:36,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:52:36,342 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2021-05-02 20:52:36,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:36,344 INFO L225 Difference]: With dead ends: 61 [2021-05-02 20:52:36,344 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 20:52:36,345 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 54.3ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:52:36,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 20:52:36,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-05-02 20:52:36,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 38 states have internal predecessors, (44), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 20:52:36,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2021-05-02 20:52:36,362 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 28 [2021-05-02 20:52:36,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:36,363 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2021-05-02 20:52:36,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:52:36,363 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2021-05-02 20:52:36,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 20:52:36,364 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:36,364 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:36,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:36,565 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:36,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:36,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1016025214, now seen corresponding path program 1 times [2021-05-02 20:52:36,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:36,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837820291] [2021-05-02 20:52:36,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:36,574 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:36,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1870480423] [2021-05-02 20:52:36,574 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 [2021-05-02 20:52:36,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:36,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:52:36,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:36,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:36,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:36,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:36,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:36,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:36,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:36,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:36,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:36,770 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:52:36,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:36,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837820291] [2021-05-02 20:52:36,771 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:36,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870480423] [2021-05-02 20:52:36,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870480423] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:52:36,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:52:36,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:52:36,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193653597] [2021-05-02 20:52:36,772 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:52:36,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:36,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:52:36,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:52:36,773 INFO L87 Difference]: Start difference. First operand 60 states and 73 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:52:36,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:36,809 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2021-05-02 20:52:36,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 20:52:36,809 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2021-05-02 20:52:36,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:36,813 INFO L225 Difference]: With dead ends: 69 [2021-05-02 20:52:36,813 INFO L226 Difference]: Without dead ends: 69 [2021-05-02 20:52:36,813 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 8.9ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:52:36,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-02 20:52:36,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2021-05-02 20:52:36,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 44 states have internal predecessors, (49), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 20:52:36,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2021-05-02 20:52:36,835 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 36 [2021-05-02 20:52:36,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:36,837 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2021-05-02 20:52:36,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:52:36,837 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2021-05-02 20:52:36,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 20:52:36,840 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:36,840 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:37,053 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:37,053 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:37,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:37,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1017127481, now seen corresponding path program 1 times [2021-05-02 20:52:37,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:37,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369908015] [2021-05-02 20:52:37,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:37,062 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:37,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1670430551] [2021-05-02 20:52:37,063 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 [2021-05-02 20:52:37,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:37,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 20:52:37,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:37,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,390 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:52:37,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:37,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369908015] [2021-05-02 20:52:37,391 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:37,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670430551] [2021-05-02 20:52:37,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670430551] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:52:37,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:52:37,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 20:52:37,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675596029] [2021-05-02 20:52:37,392 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:52:37,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:37,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:52:37,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:52:37,393 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:52:37,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:37,539 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2021-05-02 20:52:37,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:52:37,540 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2021-05-02 20:52:37,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:37,542 INFO L225 Difference]: With dead ends: 72 [2021-05-02 20:52:37,542 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 20:52:37,542 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 92.0ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:52:37,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 20:52:37,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-02 20:52:37,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 37 states have internal predecessors, (42), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 20:52:37,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2021-05-02 20:52:37,547 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 36 [2021-05-02 20:52:37,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:37,548 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2021-05-02 20:52:37,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:52:37,548 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2021-05-02 20:52:37,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 20:52:37,549 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:37,549 INFO L523 BasicCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1] [2021-05-02 20:52:37,766 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:37,766 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:37,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:37,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1880362404, now seen corresponding path program 1 times [2021-05-02 20:52:37,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:37,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974266183] [2021-05-02 20:52:37,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:37,773 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:37,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [322652862] [2021-05-02 20:52:37,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:37,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:37,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:52:37,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:37,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,932 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:52:37,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:37,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974266183] [2021-05-02 20:52:37,933 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:37,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322652862] [2021-05-02 20:52:37,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322652862] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:37,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:37,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 20:52:37,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130544755] [2021-05-02 20:52:37,934 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:52:37,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:37,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:52:37,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:52:37,935 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:52:37,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:37,975 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2021-05-02 20:52:37,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:52:37,976 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 38 [2021-05-02 20:52:37,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:37,977 INFO L225 Difference]: With dead ends: 60 [2021-05-02 20:52:37,977 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 20:52:37,977 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.2ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:52:37,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 20:52:37,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-05-02 20:52:37,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 39 states have internal predecessors, (44), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 20:52:37,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2021-05-02 20:52:37,981 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 38 [2021-05-02 20:52:37,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:37,981 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2021-05-02 20:52:37,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:52:37,981 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2021-05-02 20:52:37,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 20:52:37,982 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:37,982 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:38,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:38,197 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:38,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:38,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1525733273, now seen corresponding path program 1 times [2021-05-02 20:52:38,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:38,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424474218] [2021-05-02 20:52:38,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:38,205 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:38,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [91089469] [2021-05-02 20:52:38,205 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 [2021-05-02 20:52:38,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:38,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 20:52:38,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:38,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:38,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:38,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:38,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:38,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:38,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:38,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:38,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:38,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:38,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:38,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:38,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:38,475 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 20:52:38,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:38,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424474218] [2021-05-02 20:52:38,476 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:38,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91089469] [2021-05-02 20:52:38,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91089469] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:38,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:38,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:52:38,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611149604] [2021-05-02 20:52:38,477 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:52:38,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:38,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:52:38,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:52:38,478 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 20:52:38,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:38,731 INFO L93 Difference]: Finished difference Result 87 states and 106 transitions. [2021-05-02 20:52:38,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:52:38,732 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 46 [2021-05-02 20:52:38,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:38,733 INFO L225 Difference]: With dead ends: 87 [2021-05-02 20:52:38,733 INFO L226 Difference]: Without dead ends: 86 [2021-05-02 20:52:38,733 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 101.2ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:52:38,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-02 20:52:38,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2021-05-02 20:52:38,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 52 states have (on average 1.1923076923076923) internal successors, (62), 54 states have internal predecessors, (62), 21 states have call successors, (21), 11 states have call predecessors, (21), 10 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 20:52:38,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 101 transitions. [2021-05-02 20:52:38,751 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 101 transitions. Word has length 46 [2021-05-02 20:52:38,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:38,751 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 101 transitions. [2021-05-02 20:52:38,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 20:52:38,751 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 101 transitions. [2021-05-02 20:52:38,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 20:52:38,752 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:38,752 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:38,968 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:38,969 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:38,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:38,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1447419744, now seen corresponding path program 1 times [2021-05-02 20:52:38,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:38,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877974960] [2021-05-02 20:52:38,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:38,977 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:38,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [516497426] [2021-05-02 20:52:38,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:39,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:39,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:52:39,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:39,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:39,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:39,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:39,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:39,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:39,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:39,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:39,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:39,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:39,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:39,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:39,176 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 20:52:39,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:39,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877974960] [2021-05-02 20:52:39,176 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:39,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516497426] [2021-05-02 20:52:39,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516497426] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:39,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:39,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 20:52:39,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899029264] [2021-05-02 20:52:39,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:52:39,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:39,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:52:39,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:52:39,178 INFO L87 Difference]: Start difference. First operand 84 states and 101 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 20:52:39,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:39,216 INFO L93 Difference]: Finished difference Result 93 states and 107 transitions. [2021-05-02 20:52:39,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:52:39,217 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 54 [2021-05-02 20:52:39,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:39,218 INFO L225 Difference]: With dead ends: 93 [2021-05-02 20:52:39,218 INFO L226 Difference]: Without dead ends: 93 [2021-05-02 20:52:39,218 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 12.4ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:52:39,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-02 20:52:39,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-05-02 20:52:39,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 60 states have internal predecessors, (67), 21 states have call successors, (21), 13 states have call predecessors, (21), 12 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 20:52:39,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 106 transitions. [2021-05-02 20:52:39,223 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 106 transitions. Word has length 54 [2021-05-02 20:52:39,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:39,223 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 106 transitions. [2021-05-02 20:52:39,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 20:52:39,223 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 106 transitions. [2021-05-02 20:52:39,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 20:52:39,224 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:39,224 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:39,448 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 20:52:39,449 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:39,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:39,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1448522011, now seen corresponding path program 1 times [2021-05-02 20:52:39,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:39,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660643591] [2021-05-02 20:52:39,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:39,468 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:39,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1608366330] [2021-05-02 20:52:39,469 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 [2021-05-02 20:52:39,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:39,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 20:52:39,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:39,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:39,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:39,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:39,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:39,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:39,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:39,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:39,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:39,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:39,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:39,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:39,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:39,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:39,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:39,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:40,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:40,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:40,055 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 20:52:40,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:40,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660643591] [2021-05-02 20:52:40,055 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:40,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608366330] [2021-05-02 20:52:40,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608366330] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:40,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:40,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:52:40,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212334512] [2021-05-02 20:52:40,056 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:52:40,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:40,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:52:40,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:52:40,057 INFO L87 Difference]: Start difference. First operand 92 states and 106 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 20:52:40,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:40,316 INFO L93 Difference]: Finished difference Result 96 states and 109 transitions. [2021-05-02 20:52:40,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:52:40,317 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 54 [2021-05-02 20:52:40,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:40,318 INFO L225 Difference]: With dead ends: 96 [2021-05-02 20:52:40,318 INFO L226 Difference]: Without dead ends: 90 [2021-05-02 20:52:40,318 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 169.7ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:52:40,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-05-02 20:52:40,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-05-02 20:52:40,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 58 states have (on average 1.1206896551724137) internal successors, (65), 59 states have internal predecessors, (65), 18 states have call successors, (18), 14 states have call predecessors, (18), 13 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 20:52:40,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2021-05-02 20:52:40,325 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 54 [2021-05-02 20:52:40,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:40,327 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2021-05-02 20:52:40,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 20:52:40,327 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2021-05-02 20:52:40,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-02 20:52:40,331 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:40,331 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:40,555 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-02 20:52:40,555 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:40,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:40,556 INFO L82 PathProgramCache]: Analyzing trace with hash -161321978, now seen corresponding path program 2 times [2021-05-02 20:52:40,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:40,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959436760] [2021-05-02 20:52:40,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:40,564 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:40,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [791670430] [2021-05-02 20:52:40,564 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 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 [2021-05-02 20:52:40,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-05-02 20:52:40,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:52:40,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 20:52:40,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:40,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:40,741 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-05-02 20:52:40,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:40,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959436760] [2021-05-02 20:52:40,742 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:40,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791670430] [2021-05-02 20:52:40,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791670430] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:52:40,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:52:40,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 20:52:40,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712073762] [2021-05-02 20:52:40,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:52:40,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:40,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:52:40,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:52:40,744 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:52:40,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:40,814 INFO L93 Difference]: Finished difference Result 102 states and 116 transitions. [2021-05-02 20:52:40,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:52:40,815 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 56 [2021-05-02 20:52:40,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:40,816 INFO L225 Difference]: With dead ends: 102 [2021-05-02 20:52:40,816 INFO L226 Difference]: Without dead ends: 102 [2021-05-02 20:52:40,816 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 34.8ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:52:40,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-05-02 20:52:40,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2021-05-02 20:52:40,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 67 states have internal predecessors, (75), 21 states have call successors, (21), 15 states have call predecessors, (21), 14 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 20:52:40,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 115 transitions. [2021-05-02 20:52:40,820 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 115 transitions. Word has length 56 [2021-05-02 20:52:40,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:40,821 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 115 transitions. [2021-05-02 20:52:40,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:52:40,821 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 115 transitions. [2021-05-02 20:52:40,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 20:52:40,822 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:40,822 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:41,045 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:41,045 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:41,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:41,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1294763379, now seen corresponding path program 1 times [2021-05-02 20:52:41,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:41,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077110236] [2021-05-02 20:52:41,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:41,053 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:41,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1804505006] [2021-05-02 20:52:41,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:41,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:41,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:52:41,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:41,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:41,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:41,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:41,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:41,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:41,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:41,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:41,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:41,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:41,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:41,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:41,245 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 36 proven. 46 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-05-02 20:52:41,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:41,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077110236] [2021-05-02 20:52:41,245 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:41,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804505006] [2021-05-02 20:52:41,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804505006] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:41,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:41,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 20:52:41,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620979802] [2021-05-02 20:52:41,246 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:52:41,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:41,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:52:41,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:52:41,247 INFO L87 Difference]: Start difference. First operand 101 states and 115 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 20:52:41,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:41,302 INFO L93 Difference]: Finished difference Result 103 states and 117 transitions. [2021-05-02 20:52:41,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:52:41,302 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) Word has length 61 [2021-05-02 20:52:41,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:41,304 INFO L225 Difference]: With dead ends: 103 [2021-05-02 20:52:41,304 INFO L226 Difference]: Without dead ends: 103 [2021-05-02 20:52:41,304 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 24.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:52:41,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-02 20:52:41,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-05-02 20:52:41,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 67 states have (on average 1.1492537313432836) internal successors, (77), 69 states have internal predecessors, (77), 21 states have call successors, (21), 15 states have call predecessors, (21), 14 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 20:52:41,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 117 transitions. [2021-05-02 20:52:41,309 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 117 transitions. Word has length 61 [2021-05-02 20:52:41,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:41,309 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 117 transitions. [2021-05-02 20:52:41,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 20:52:41,309 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 117 transitions. [2021-05-02 20:52:41,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 20:52:41,310 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:41,310 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:41,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:41,525 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:41,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:41,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1774996485, now seen corresponding path program 2 times [2021-05-02 20:52:41,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:41,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315342840] [2021-05-02 20:52:41,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:41,532 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:41,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1578753896] [2021-05-02 20:52:41,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:41,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:52:41,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:52:41,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-02 20:52:41,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:41,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:41,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:41,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:41,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:41,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:41,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:41,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:41,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:41,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:41,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:41,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:41,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:41,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:41,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:41,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:41,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:41,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:41,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:41,972 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 43 proven. 34 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-05-02 20:52:41,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:41,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315342840] [2021-05-02 20:52:41,973 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:41,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578753896] [2021-05-02 20:52:41,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578753896] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:41,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:41,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 20:52:41,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574276867] [2021-05-02 20:52:41,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 20:52:41,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:41,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 20:52:41,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:52:41,975 INFO L87 Difference]: Start difference. First operand 103 states and 117 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 10 states have internal predecessors, (24), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 20:52:42,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:42,390 INFO L93 Difference]: Finished difference Result 138 states and 168 transitions. [2021-05-02 20:52:42,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:52:42,391 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 10 states have internal predecessors, (24), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) Word has length 64 [2021-05-02 20:52:42,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:42,393 INFO L225 Difference]: With dead ends: 138 [2021-05-02 20:52:42,393 INFO L226 Difference]: Without dead ends: 131 [2021-05-02 20:52:42,393 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 159.2ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:52:42,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-02 20:52:42,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 125. [2021-05-02 20:52:42,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 80 states have (on average 1.175) internal successors, (94), 83 states have internal predecessors, (94), 28 states have call successors, (28), 17 states have call predecessors, (28), 16 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 20:52:42,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 148 transitions. [2021-05-02 20:52:42,400 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 148 transitions. Word has length 64 [2021-05-02 20:52:42,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:42,400 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 148 transitions. [2021-05-02 20:52:42,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 10 states have internal predecessors, (24), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 20:52:42,401 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 148 transitions. [2021-05-02 20:52:42,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 20:52:42,401 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:42,401 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:42,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 20:52:42,625 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:42,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:42,625 INFO L82 PathProgramCache]: Analyzing trace with hash 112143503, now seen corresponding path program 1 times [2021-05-02 20:52:42,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:42,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760123957] [2021-05-02 20:52:42,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:42,631 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:42,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [904538490] [2021-05-02 20:52:42,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:42,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:42,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 20:52:42,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:42,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:42,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:42,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:42,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:42,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:42,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:42,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:42,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:42,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:42,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:42,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:42,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:42,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:42,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:42,826 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 16 proven. 92 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 20:52:42,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:42,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760123957] [2021-05-02 20:52:42,827 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:42,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904538490] [2021-05-02 20:52:42,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904538490] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:42,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:42,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:52:42,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315716305] [2021-05-02 20:52:42,828 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:52:42,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:42,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:52:42,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:52:42,829 INFO L87 Difference]: Start difference. First operand 125 states and 148 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 20:52:42,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:42,912 INFO L93 Difference]: Finished difference Result 138 states and 158 transitions. [2021-05-02 20:52:42,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:52:42,913 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 68 [2021-05-02 20:52:42,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:42,915 INFO L225 Difference]: With dead ends: 138 [2021-05-02 20:52:42,915 INFO L226 Difference]: Without dead ends: 138 [2021-05-02 20:52:42,916 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 24.7ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:52:42,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-05-02 20:52:42,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2021-05-02 20:52:42,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 90 states have (on average 1.1444444444444444) internal successors, (103), 92 states have internal predecessors, (103), 28 states have call successors, (28), 19 states have call predecessors, (28), 18 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 20:52:42,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 157 transitions. [2021-05-02 20:52:42,925 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 157 transitions. Word has length 68 [2021-05-02 20:52:42,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:42,926 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 157 transitions. [2021-05-02 20:52:42,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 20:52:42,926 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 157 transitions. [2021-05-02 20:52:42,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 20:52:42,926 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:42,927 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:43,150 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 20:52:43,150 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:43,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:43,150 INFO L82 PathProgramCache]: Analyzing trace with hash 113245770, now seen corresponding path program 1 times [2021-05-02 20:52:43,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:43,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879126801] [2021-05-02 20:52:43,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:43,157 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:43,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [907493028] [2021-05-02 20:52:43,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:43,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:43,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 20:52:43,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:43,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:43,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:43,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:43,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:43,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:43,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:43,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:43,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:43,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:43,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:43,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:43,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:43,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:43,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:43,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:43,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:43,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:43,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:43,641 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-05-02 20:52:43,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:43,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879126801] [2021-05-02 20:52:43,641 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:43,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907493028] [2021-05-02 20:52:43,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907493028] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:43,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:43,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:52:43,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352071987] [2021-05-02 20:52:43,642 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:52:43,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:43,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:52:43,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:52:43,643 INFO L87 Difference]: Start difference. First operand 137 states and 157 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 20:52:43,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:43,859 INFO L93 Difference]: Finished difference Result 149 states and 174 transitions. [2021-05-02 20:52:43,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:52:43,859 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 68 [2021-05-02 20:52:43,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:43,861 INFO L225 Difference]: With dead ends: 149 [2021-05-02 20:52:43,861 INFO L226 Difference]: Without dead ends: 149 [2021-05-02 20:52:43,861 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 154.5ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:52:43,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-02 20:52:43,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 147. [2021-05-02 20:52:43,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 97 states have (on average 1.1649484536082475) internal successors, (113), 99 states have internal predecessors, (113), 30 states have call successors, (30), 20 states have call predecessors, (30), 19 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-02 20:52:43,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 171 transitions. [2021-05-02 20:52:43,871 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 171 transitions. Word has length 68 [2021-05-02 20:52:43,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:43,871 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 171 transitions. [2021-05-02 20:52:43,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 20:52:43,872 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 171 transitions. [2021-05-02 20:52:43,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 20:52:43,872 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:43,872 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:44,092 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 20:52:44,093 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:44,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:44,093 INFO L82 PathProgramCache]: Analyzing trace with hash -2039825082, now seen corresponding path program 2 times [2021-05-02 20:52:44,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:44,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320010238] [2021-05-02 20:52:44,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:44,103 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:44,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [930502261] [2021-05-02 20:52:44,104 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:44,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:52:44,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:52:44,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 20:52:44,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:44,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,600 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 46 proven. 24 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-05-02 20:52:44,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:44,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320010238] [2021-05-02 20:52:44,601 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:44,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930502261] [2021-05-02 20:52:44,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930502261] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:44,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:44,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:52:44,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575798834] [2021-05-02 20:52:44,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:52:44,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:44,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:52:44,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:52:44,602 INFO L87 Difference]: Start difference. First operand 147 states and 171 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2021-05-02 20:52:44,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:44,893 INFO L93 Difference]: Finished difference Result 150 states and 171 transitions. [2021-05-02 20:52:44,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:52:44,893 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) Word has length 73 [2021-05-02 20:52:44,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:44,894 INFO L225 Difference]: With dead ends: 150 [2021-05-02 20:52:44,894 INFO L226 Difference]: Without dead ends: 149 [2021-05-02 20:52:44,895 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 162.4ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:52:44,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-02 20:52:44,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2021-05-02 20:52:44,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 97 states have (on average 1.134020618556701) internal successors, (110), 100 states have internal predecessors, (110), 31 states have call successors, (31), 21 states have call predecessors, (31), 20 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-02 20:52:44,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 169 transitions. [2021-05-02 20:52:44,902 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 169 transitions. Word has length 73 [2021-05-02 20:52:44,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:44,903 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 169 transitions. [2021-05-02 20:52:44,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2021-05-02 20:52:44,903 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 169 transitions. [2021-05-02 20:52:44,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-02 20:52:44,905 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:44,905 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:45,126 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:45,127 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:45,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:45,127 INFO L82 PathProgramCache]: Analyzing trace with hash -742748636, now seen corresponding path program 1 times [2021-05-02 20:52:45,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:45,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714126641] [2021-05-02 20:52:45,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:45,132 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:45,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [612581444] [2021-05-02 20:52:45,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:45,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:45,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 20:52:45,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:45,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:45,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:45,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:45,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:45,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:45,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:45,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:45,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:45,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:45,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:45,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:45,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:45,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:45,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:45,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:45,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:45,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:45,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:45,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:45,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:45,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:45,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:45,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:45,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:45,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:45,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:45,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:45,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:45,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,737 WARN L205 SmtUtils]: Spent 16.73 s on a formula simplification. DAG size of input: 89 DAG size of output: 80 [2021-05-02 20:53:02,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,222 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-05-02 20:53:03,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:04,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:04,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:04,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:04,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:04,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:05,163 WARN L159 QuantifierPusher]: Ignoring assumption.