/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/sqrt1-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 10:53:37,032 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 10:53:37,034 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 10:53:37,079 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 10:53:37,079 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 10:53:37,080 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 10:53:37,089 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 10:53:37,095 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 10:53:37,097 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 10:53:37,103 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 10:53:37,103 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 10:53:37,104 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 10:53:37,104 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 10:53:37,105 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 10:53:37,106 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 10:53:37,106 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 10:53:37,107 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 10:53:37,108 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 10:53:37,109 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 10:53:37,110 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 10:53:37,111 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 10:53:37,114 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 10:53:37,116 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 10:53:37,117 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 10:53:37,119 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 10:53:37,125 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 10:53:37,126 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 10:53:37,126 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 10:53:37,132 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 10:53:37,148 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 10:53:37,148 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 10:53:37,151 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 10:53:37,151 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 10:53:37,151 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 10:53:37,151 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 10:53:37,151 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 10:53:37,151 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 10:53:37,152 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 10:53:37,152 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 10:53:37,153 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 10:53:37,153 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 10:53:37,153 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 10:53:37,153 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 10:53:37,153 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 10:53:37,153 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 10:53:37,153 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 10:53:37,154 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 10:53:37,154 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 10:53:37,154 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 10:53:37,154 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 10:53:37,155 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 10:53:37,155 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 10:53:37,427 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 10:53:37,444 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 10:53:37,446 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 10:53:37,447 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 10:53:37,448 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 10:53:37,448 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound50.c [2021-05-06 10:53:37,509 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd7c08fde/98c3621a5770474daf2ecf2ad3574a0d/FLAG5ddc4c288 [2021-05-06 10:53:37,876 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 10:53:37,877 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound50.c [2021-05-06 10:53:37,882 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd7c08fde/98c3621a5770474daf2ecf2ad3574a0d/FLAG5ddc4c288 [2021-05-06 10:53:37,903 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd7c08fde/98c3621a5770474daf2ecf2ad3574a0d [2021-05-06 10:53:37,905 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 10:53:37,909 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 10:53:37,911 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 10:53:37,911 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 10:53:37,914 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 10:53:37,915 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:53:37" (1/1) ... [2021-05-06 10:53:37,916 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76f40e4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:53:37, skipping insertion in model container [2021-05-06 10:53:37,916 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:53:37" (1/1) ... [2021-05-06 10:53:37,922 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 10:53:37,936 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 10:53:38,038 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/sqrt1-ll_unwindbound50.c[520,533] [2021-05-06 10:53:38,050 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:53:38,057 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 10:53:38,067 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/sqrt1-ll_unwindbound50.c[520,533] [2021-05-06 10:53:38,072 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:53:38,098 INFO L208 MainTranslator]: Completed translation [2021-05-06 10:53:38,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:53:38 WrapperNode [2021-05-06 10:53:38,098 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 10:53:38,100 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 10:53:38,100 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 10:53:38,101 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 10:53:38,127 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:53:38" (1/1) ... [2021-05-06 10:53:38,127 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:53:38" (1/1) ... [2021-05-06 10:53:38,132 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:53:38" (1/1) ... [2021-05-06 10:53:38,133 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:53:38" (1/1) ... [2021-05-06 10:53:38,137 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:53:38" (1/1) ... [2021-05-06 10:53:38,146 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:53:38" (1/1) ... [2021-05-06 10:53:38,148 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:53:38" (1/1) ... [2021-05-06 10:53:38,155 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 10:53:38,156 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 10:53:38,157 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 10:53:38,157 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 10:53:38,158 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:53:38" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 10:53:38,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 10:53:38,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 10:53:38,230 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 10:53:38,231 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 10:53:38,231 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 10:53:38,231 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 10:53:38,231 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 10:53:38,231 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 10:53:38,231 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 10:53:38,231 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 10:53:38,231 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 10:53:38,232 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 10:53:38,232 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 10:53:38,232 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 10:53:38,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 10:53:38,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 10:53:38,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 10:53:38,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 10:53:38,233 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 10:53:38,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 10:53:38,522 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 10:53:38,522 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 10:53:38,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:53:38 BoogieIcfgContainer [2021-05-06 10:53:38,523 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 10:53:38,524 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 10:53:38,524 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 10:53:38,524 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 10:53:38,526 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:53:38" (1/1) ... [2021-05-06 10:53:38,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:53:38 BasicIcfg [2021-05-06 10:53:38,554 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 10:53:38,556 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 10:53:38,556 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 10:53:38,558 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 10:53:38,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 10:53:37" (1/4) ... [2021-05-06 10:53:38,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d1939b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:53:38, skipping insertion in model container [2021-05-06 10:53:38,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:53:38" (2/4) ... [2021-05-06 10:53:38,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d1939b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:53:38, skipping insertion in model container [2021-05-06 10:53:38,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:53:38" (3/4) ... [2021-05-06 10:53:38,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d1939b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 10:53:38, skipping insertion in model container [2021-05-06 10:53:38,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:53:38" (4/4) ... [2021-05-06 10:53:38,561 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_unwindbound50.cJordan [2021-05-06 10:53:38,565 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 10:53:38,568 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 10:53:38,584 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 10:53:38,599 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 10:53:38,599 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 10:53:38,600 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 10:53:38,600 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 10:53:38,600 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 10:53:38,600 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 10:53:38,600 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 10:53:38,600 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 10:53:38,610 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 10:53:38,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 10:53:38,616 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:38,616 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:38,617 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:38,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:38,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1238828824, now seen corresponding path program 1 times [2021-05-06 10:53:38,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:38,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978340406] [2021-05-06 10:53:38,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:38,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:53:38,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 10:53:38,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:53:38,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:53:38,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:38,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978340406] [2021-05-06 10:53:38,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978340406] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:53:38,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:53:38,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 10:53:38,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87485432] [2021-05-06 10:53:38,809 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 10:53:38,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:38,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 10:53:38,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:53:38,822 INFO L87 Difference]: Start difference. First operand has 26 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 10:53:38,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:38,930 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2021-05-06 10:53:38,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 10:53:38,932 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-06 10:53:38,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:38,938 INFO L225 Difference]: With dead ends: 27 [2021-05-06 10:53:38,938 INFO L226 Difference]: Without dead ends: 22 [2021-05-06 10:53:38,940 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:53:38,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-06 10:53:38,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-05-06 10:53:38,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 10:53:38,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2021-05-06 10:53:38,968 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 11 [2021-05-06 10:53:38,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:38,968 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2021-05-06 10:53:38,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 10:53:38,969 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2021-05-06 10:53:38,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 10:53:38,969 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:38,970 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:38,970 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 10:53:38,970 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:38,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:38,971 INFO L82 PathProgramCache]: Analyzing trace with hash -221581531, now seen corresponding path program 1 times [2021-05-06 10:53:38,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:38,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133422494] [2021-05-06 10:53:38,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:38,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:53:39,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 10:53:39,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:53:39,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:53:39,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:39,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133422494] [2021-05-06 10:53:39,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133422494] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:53:39,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:53:39,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 10:53:39,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109249014] [2021-05-06 10:53:39,110 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:53:39,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:39,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:53:39,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:53:39,112 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 10:53:39,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:39,244 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2021-05-06 10:53:39,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:53:39,245 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 10:53:39,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:39,245 INFO L225 Difference]: With dead ends: 23 [2021-05-06 10:53:39,246 INFO L226 Difference]: Without dead ends: 23 [2021-05-06 10:53:39,246 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 106.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:53:39,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-06 10:53:39,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-06 10:53:39,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 10:53:39,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2021-05-06 10:53:39,251 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 12 [2021-05-06 10:53:39,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:39,252 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2021-05-06 10:53:39,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 10:53:39,252 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2021-05-06 10:53:39,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 10:53:39,252 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:39,253 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:39,253 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 10:53:39,253 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:39,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:39,253 INFO L82 PathProgramCache]: Analyzing trace with hash -220509055, now seen corresponding path program 1 times [2021-05-06 10:53:39,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:39,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331080446] [2021-05-06 10:53:39,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:39,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:53:39,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 10:53:39,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:53:39,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:53:39,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:39,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331080446] [2021-05-06 10:53:39,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331080446] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:53:39,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:53:39,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 10:53:39,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180680956] [2021-05-06 10:53:39,360 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:53:39,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:39,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:53:39,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:53:39,365 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 10:53:39,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:39,668 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2021-05-06 10:53:39,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 10:53:39,669 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 10:53:39,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:39,671 INFO L225 Difference]: With dead ends: 34 [2021-05-06 10:53:39,671 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 10:53:39,672 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 191.8ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 10:53:39,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 10:53:39,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-05-06 10:53:39,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 10:53:39,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-06 10:53:39,682 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 12 [2021-05-06 10:53:39,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:39,682 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-06 10:53:39,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 10:53:39,683 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-06 10:53:39,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 10:53:39,683 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:39,683 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:39,683 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 10:53:39,684 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:39,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:39,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1748396925, now seen corresponding path program 1 times [2021-05-06 10:53:39,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:39,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665914605] [2021-05-06 10:53:39,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:39,708 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:39,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [521042193] [2021-05-06 10:53:39,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:53:39,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:53:39,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 10:53:39,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:39,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:39,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:53:39,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:39,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665914605] [2021-05-06 10:53:39,842 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:39,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521042193] [2021-05-06 10:53:39,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521042193] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:53:39,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:53:39,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 10:53:39,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380531082] [2021-05-06 10:53:39,843 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:53:39,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:39,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:53:39,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:53:39,844 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 10:53:39,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:39,876 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-06 10:53:39,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 10:53:39,877 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2021-05-06 10:53:39,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:39,877 INFO L225 Difference]: With dead ends: 38 [2021-05-06 10:53:39,878 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 10:53:39,878 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:53:39,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 10:53:39,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2021-05-06 10:53:39,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 10:53:39,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2021-05-06 10:53:39,884 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 17 [2021-05-06 10:53:39,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:39,884 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2021-05-06 10:53:39,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 10:53:39,884 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2021-05-06 10:53:39,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 10:53:39,885 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:39,885 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:40,109 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:53:40,109 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:40,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:40,110 INFO L82 PathProgramCache]: Analyzing trace with hash -214718627, now seen corresponding path program 1 times [2021-05-06 10:53:40,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:40,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142002991] [2021-05-06 10:53:40,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:40,126 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:40,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [577335387] [2021-05-06 10:53:40,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:53:40,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:53:40,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 10:53:40,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:40,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:40,245 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 10:53:40,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:40,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142002991] [2021-05-06 10:53:40,246 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:40,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577335387] [2021-05-06 10:53:40,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577335387] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:53:40,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:53:40,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 10:53:40,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629981054] [2021-05-06 10:53:40,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:53:40,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:40,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:53:40,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:53:40,248 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:53:40,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:40,281 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2021-05-06 10:53:40,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 10:53:40,281 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 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 22 [2021-05-06 10:53:40,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:40,282 INFO L225 Difference]: With dead ends: 42 [2021-05-06 10:53:40,282 INFO L226 Difference]: Without dead ends: 39 [2021-05-06 10:53:40,282 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:53:40,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-06 10:53:40,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-05-06 10:53:40,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 10:53:40,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2021-05-06 10:53:40,287 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 22 [2021-05-06 10:53:40,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:40,287 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2021-05-06 10:53:40,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:53:40,288 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2021-05-06 10:53:40,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-06 10:53:40,288 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:40,289 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] [2021-05-06 10:53:40,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:53:40,505 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:40,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:40,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1697115236, now seen corresponding path program 1 times [2021-05-06 10:53:40,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:40,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438295911] [2021-05-06 10:53:40,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:40,517 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:40,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1220430927] [2021-05-06 10:53:40,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:53:40,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:53:40,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 10:53:40,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:40,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:40,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:40,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:40,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:40,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:40,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:40,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:40,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:40,675 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 10:53:40,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:40,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438295911] [2021-05-06 10:53:40,676 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:40,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220430927] [2021-05-06 10:53:40,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220430927] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:53:40,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:53:40,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 10:53:40,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198336994] [2021-05-06 10:53:40,677 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:53:40,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:40,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:53:40,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:53:40,677 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 10:53:40,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:40,708 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2021-05-06 10:53:40,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:53:40,709 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2021-05-06 10:53:40,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:40,709 INFO L225 Difference]: With dead ends: 41 [2021-05-06 10:53:40,710 INFO L226 Difference]: Without dead ends: 41 [2021-05-06 10:53:40,710 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.4ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:53:40,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-06 10:53:40,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-05-06 10:53:40,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 10:53:40,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2021-05-06 10:53:40,738 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 30 [2021-05-06 10:53:40,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:40,738 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2021-05-06 10:53:40,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 10:53:40,739 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2021-05-06 10:53:40,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-06 10:53:40,740 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:40,740 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:40,963 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:53:40,964 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:40,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:40,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1698187712, now seen corresponding path program 1 times [2021-05-06 10:53:40,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:40,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410234110] [2021-05-06 10:53:40,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:40,974 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:40,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1113658323] [2021-05-06 10:53:40,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:53:41,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:53:41,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 10:53:41,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:41,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:41,159 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 10:53:41,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:41,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410234110] [2021-05-06 10:53:41,159 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:41,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113658323] [2021-05-06 10:53:41,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113658323] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:53:41,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:53:41,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 10:53:41,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925309291] [2021-05-06 10:53:41,161 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:53:41,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:41,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:53:41,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:53:41,162 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 10:53:41,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:41,227 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2021-05-06 10:53:41,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:53:41,230 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2021-05-06 10:53:41,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:41,231 INFO L225 Difference]: With dead ends: 52 [2021-05-06 10:53:41,231 INFO L226 Difference]: Without dead ends: 52 [2021-05-06 10:53:41,234 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.5ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:53:41,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-06 10:53:41,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2021-05-06 10:53:41,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 30 states have internal predecessors, (32), 15 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 10:53:41,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2021-05-06 10:53:41,248 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 30 [2021-05-06 10:53:41,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:41,249 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2021-05-06 10:53:41,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 10:53:41,249 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2021-05-06 10:53:41,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-06 10:53:41,250 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:41,250 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:41,450 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:53:41,450 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:41,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:41,451 INFO L82 PathProgramCache]: Analyzing trace with hash 888200606, now seen corresponding path program 2 times [2021-05-06 10:53:41,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:41,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471667540] [2021-05-06 10:53:41,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:41,459 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:41,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1524311820] [2021-05-06 10:53:41,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:53:41,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:53:41,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:53:41,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 10:53:41,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:41,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:41,609 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 10:53:41,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:41,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471667540] [2021-05-06 10:53:41,610 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:41,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524311820] [2021-05-06 10:53:41,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524311820] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:53:41,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:53:41,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 10:53:41,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426522969] [2021-05-06 10:53:41,611 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:53:41,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:41,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:53:41,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:53:41,612 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 10:53:41,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:41,670 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2021-05-06 10:53:41,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:53:41,670 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 35 [2021-05-06 10:53:41,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:41,674 INFO L225 Difference]: With dead ends: 56 [2021-05-06 10:53:41,674 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 10:53:41,674 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.0ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:53:41,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 10:53:41,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-06 10:53:41,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 33 states have internal predecessors, (35), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 10:53:41,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2021-05-06 10:53:41,684 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 35 [2021-05-06 10:53:41,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:41,685 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2021-05-06 10:53:41,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 10:53:41,685 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2021-05-06 10:53:41,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-06 10:53:41,685 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:41,685 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] [2021-05-06 10:53:41,886 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:53:41,886 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:41,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:41,887 INFO L82 PathProgramCache]: Analyzing trace with hash -880778788, now seen corresponding path program 3 times [2021-05-06 10:53:41,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:41,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066275617] [2021-05-06 10:53:41,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:41,894 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:41,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1705045559] [2021-05-06 10:53:41,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:53:41,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 10:53:41,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:53:41,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 10:53:41,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:42,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:42,048 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 10:53:42,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:42,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066275617] [2021-05-06 10:53:42,049 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:42,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705045559] [2021-05-06 10:53:42,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705045559] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:53:42,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:53:42,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 10:53:42,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313790139] [2021-05-06 10:53:42,049 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:53:42,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:42,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:53:42,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:53:42,050 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 10:53:42,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:42,119 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2021-05-06 10:53:42,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:53:42,119 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 40 [2021-05-06 10:53:42,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:42,120 INFO L225 Difference]: With dead ends: 60 [2021-05-06 10:53:42,120 INFO L226 Difference]: Without dead ends: 57 [2021-05-06 10:53:42,120 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:53:42,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-06 10:53:42,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-05-06 10:53:42,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 34 states have (on average 1.088235294117647) internal successors, (37), 35 states have internal predecessors, (37), 14 states have call successors, (14), 9 states have call predecessors, (14), 8 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 10:53:42,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2021-05-06 10:53:42,124 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 40 [2021-05-06 10:53:42,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:42,124 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2021-05-06 10:53:42,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 10:53:42,124 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2021-05-06 10:53:42,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-06 10:53:42,125 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:42,125 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] [2021-05-06 10:53:42,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:53:42,341 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:42,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:42,342 INFO L82 PathProgramCache]: Analyzing trace with hash 2014164963, now seen corresponding path program 2 times [2021-05-06 10:53:42,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:42,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295101354] [2021-05-06 10:53:42,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:42,349 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:42,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1577578174] [2021-05-06 10:53:42,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:53:42,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:53:42,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:53:42,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 10:53:42,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:42,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:42,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:42,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:42,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:42,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:42,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:42,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:42,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:42,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:42,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:42,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:42,531 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 46 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 10:53:42,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:42,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295101354] [2021-05-06 10:53:42,532 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:42,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577578174] [2021-05-06 10:53:42,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577578174] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:53:42,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:53:42,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 10:53:42,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789454498] [2021-05-06 10:53:42,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:53:42,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:42,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:53:42,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:53:42,535 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 10:53:42,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:42,586 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2021-05-06 10:53:42,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 10:53:42,587 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 48 [2021-05-06 10:53:42,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:42,587 INFO L225 Difference]: With dead ends: 59 [2021-05-06 10:53:42,587 INFO L226 Difference]: Without dead ends: 59 [2021-05-06 10:53:42,588 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 22.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:53:42,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-06 10:53:42,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-05-06 10:53:42,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 37 states have internal predecessors, (39), 14 states have call successors, (14), 9 states have call predecessors, (14), 8 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 10:53:42,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2021-05-06 10:53:42,598 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 48 [2021-05-06 10:53:42,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:42,599 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2021-05-06 10:53:42,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 10:53:42,600 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2021-05-06 10:53:42,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-06 10:53:42,601 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:42,601 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:42,816 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 10:53:42,817 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:42,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:42,817 INFO L82 PathProgramCache]: Analyzing trace with hash 2015237439, now seen corresponding path program 4 times [2021-05-06 10:53:42,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:42,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672112820] [2021-05-06 10:53:42,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:42,824 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:42,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1060222574] [2021-05-06 10:53:42,825 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:53:42,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 10:53:42,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:53:42,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 10:53:42,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:42,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:42,998 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 29 proven. 7 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-06 10:53:42,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:42,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672112820] [2021-05-06 10:53:42,999 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:42,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060222574] [2021-05-06 10:53:42,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060222574] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:53:42,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:53:42,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:53:42,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197222836] [2021-05-06 10:53:43,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:53:43,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:43,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:53:43,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:53:43,000 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 10:53:43,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:43,065 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2021-05-06 10:53:43,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 10:53:43,066 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 48 [2021-05-06 10:53:43,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:43,068 INFO L225 Difference]: With dead ends: 63 [2021-05-06 10:53:43,068 INFO L226 Difference]: Without dead ends: 63 [2021-05-06 10:53:43,068 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 32.6ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 10:53:43,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-06 10:53:43,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-05-06 10:53:43,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 40 states have internal predecessors, (42), 14 states have call successors, (14), 10 states have call predecessors, (14), 9 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 10:53:43,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2021-05-06 10:53:43,075 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 48 [2021-05-06 10:53:43,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:43,076 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2021-05-06 10:53:43,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 10:53:43,076 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2021-05-06 10:53:43,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-06 10:53:43,080 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:43,080 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:43,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-06 10:53:43,304 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:43,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:43,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1772710271, now seen corresponding path program 5 times [2021-05-06 10:53:43,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:43,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820027947] [2021-05-06 10:53:43,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:43,312 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:43,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1989344800] [2021-05-06 10:53:43,312 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:53:43,382 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-06 10:53:43,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:53:43,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 10:53:43,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:43,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:43,535 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 14 proven. 14 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-05-06 10:53:43,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:43,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820027947] [2021-05-06 10:53:43,536 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:43,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989344800] [2021-05-06 10:53:43,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989344800] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:53:43,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:53:43,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:53:43,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627034796] [2021-05-06 10:53:43,537 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:53:43,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:43,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:53:43,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:53:43,538 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-06 10:53:43,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:43,632 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2021-05-06 10:53:43,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 10:53:43,633 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 53 [2021-05-06 10:53:43,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:43,634 INFO L225 Difference]: With dead ends: 74 [2021-05-06 10:53:43,635 INFO L226 Difference]: Without dead ends: 74 [2021-05-06 10:53:43,635 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.9ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:53:43,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-06 10:53:43,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2021-05-06 10:53:43,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 45 states have internal predecessors, (47), 19 states have call successors, (19), 11 states have call predecessors, (19), 10 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 10:53:43,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2021-05-06 10:53:43,641 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 53 [2021-05-06 10:53:43,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:43,641 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2021-05-06 10:53:43,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-06 10:53:43,641 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2021-05-06 10:53:43,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-06 10:53:43,642 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:43,642 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] [2021-05-06 10:53:43,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:53:43,845 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:43,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:43,845 INFO L82 PathProgramCache]: Analyzing trace with hash 2069437083, now seen corresponding path program 6 times [2021-05-06 10:53:43,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:43,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901002520] [2021-05-06 10:53:43,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:43,851 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:43,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1766087588] [2021-05-06 10:53:43,851 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:53:43,999 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-06 10:53:43,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:53:44,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-06 10:53:44,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:44,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:44,149 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 27 proven. 26 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-05-06 10:53:44,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:44,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901002520] [2021-05-06 10:53:44,150 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:44,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766087588] [2021-05-06 10:53:44,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766087588] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:53:44,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:53:44,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 10:53:44,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809652601] [2021-05-06 10:53:44,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 10:53:44,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:44,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 10:53:44,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 10:53:44,151 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-06 10:53:44,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:44,284 INFO L93 Difference]: Finished difference Result 78 states and 87 transitions. [2021-05-06 10:53:44,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 10:53:44,285 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 58 [2021-05-06 10:53:44,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:44,286 INFO L225 Difference]: With dead ends: 78 [2021-05-06 10:53:44,286 INFO L226 Difference]: Without dead ends: 75 [2021-05-06 10:53:44,286 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 66.2ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 10:53:44,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-06 10:53:44,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-05-06 10:53:44,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 46 states have (on average 1.065217391304348) internal successors, (49), 47 states have internal predecessors, (49), 17 states have call successors, (17), 12 states have call predecessors, (17), 11 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 10:53:44,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2021-05-06 10:53:44,289 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 58 [2021-05-06 10:53:44,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:44,289 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2021-05-06 10:53:44,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-06 10:53:44,290 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2021-05-06 10:53:44,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-06 10:53:44,290 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:44,290 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:44,497 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:53:44,498 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:44,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:44,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1287458629, now seen corresponding path program 1 times [2021-05-06 10:53:44,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:44,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820731655] [2021-05-06 10:53:44,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:44,512 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:44,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1964063203] [2021-05-06 10:53:44,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:53:44,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:53:44,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 10:53:44,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:44,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:44,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:44,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:44,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:44,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:44,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:44,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:44,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:44,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:44,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:44,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:44,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:44,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:44,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:44,762 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 54 proven. 132 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-05-06 10:53:44,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:44,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820731655] [2021-05-06 10:53:44,763 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:44,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964063203] [2021-05-06 10:53:44,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964063203] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:53:44,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:53:44,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:53:44,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278090725] [2021-05-06 10:53:44,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:53:44,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:44,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:53:44,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:53:44,765 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 6 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 10:53:44,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:44,826 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2021-05-06 10:53:44,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 10:53:44,826 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 6 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 71 [2021-05-06 10:53:44,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:44,827 INFO L225 Difference]: With dead ends: 81 [2021-05-06 10:53:44,827 INFO L226 Difference]: Without dead ends: 81 [2021-05-06 10:53:44,827 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 33.1ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-06 10:53:44,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-06 10:53:44,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-05-06 10:53:44,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 52 states have internal predecessors, (54), 17 states have call successors, (17), 13 states have call predecessors, (17), 12 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 10:53:44,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2021-05-06 10:53:44,831 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 71 [2021-05-06 10:53:44,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:44,831 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2021-05-06 10:53:44,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 6 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 10:53:44,831 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2021-05-06 10:53:44,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-06 10:53:44,832 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:44,832 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:45,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 10:53:45,056 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:45,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:45,057 INFO L82 PathProgramCache]: Analyzing trace with hash 641015584, now seen corresponding path program 7 times [2021-05-06 10:53:45,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:45,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475543030] [2021-05-06 10:53:45,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:45,063 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:45,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [993132221] [2021-05-06 10:53:45,064 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:53:45,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:53:45,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-06 10:53:45,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:45,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:45,295 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-05-06 10:53:45,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:45,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475543030] [2021-05-06 10:53:45,295 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:45,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993132221] [2021-05-06 10:53:45,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993132221] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:53:45,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:53:45,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 10:53:45,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132832179] [2021-05-06 10:53:45,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 10:53:45,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:45,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 10:53:45,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:53:45,297 INFO L87 Difference]: Start difference. First operand 81 states and 86 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 10:53:45,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:45,410 INFO L93 Difference]: Finished difference Result 92 states and 102 transitions. [2021-05-06 10:53:45,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 10:53:45,410 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 71 [2021-05-06 10:53:45,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:45,411 INFO L225 Difference]: With dead ends: 92 [2021-05-06 10:53:45,411 INFO L226 Difference]: Without dead ends: 92 [2021-05-06 10:53:45,411 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.1ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 10:53:45,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-06 10:53:45,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2021-05-06 10:53:45,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 57 states have internal predecessors, (59), 22 states have call successors, (22), 14 states have call predecessors, (22), 13 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-06 10:53:45,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 101 transitions. [2021-05-06 10:53:45,415 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 101 transitions. Word has length 71 [2021-05-06 10:53:45,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:45,415 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 101 transitions. [2021-05-06 10:53:45,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 10:53:45,416 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 101 transitions. [2021-05-06 10:53:45,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-06 10:53:45,416 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:45,416 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:45,625 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-06 10:53:45,625 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:45,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:45,625 INFO L82 PathProgramCache]: Analyzing trace with hash -846020198, now seen corresponding path program 8 times [2021-05-06 10:53:45,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:45,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482811810] [2021-05-06 10:53:45,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:45,632 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:45,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1956699232] [2021-05-06 10:53:45,632 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:53:45,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:53:45,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:53:45,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 10:53:45,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:45,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:45,874 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 22 proven. 33 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-05-06 10:53:45,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:45,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482811810] [2021-05-06 10:53:45,874 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:45,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956699232] [2021-05-06 10:53:45,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956699232] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:53:45,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:53:45,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 10:53:45,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197152306] [2021-05-06 10:53:45,875 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 10:53:45,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:45,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 10:53:45,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:53:45,875 INFO L87 Difference]: Start difference. First operand 91 states and 101 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 10:53:45,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:45,998 INFO L93 Difference]: Finished difference Result 96 states and 105 transitions. [2021-05-06 10:53:45,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 10:53:45,998 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 76 [2021-05-06 10:53:45,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:45,999 INFO L225 Difference]: With dead ends: 96 [2021-05-06 10:53:45,999 INFO L226 Difference]: Without dead ends: 93 [2021-05-06 10:53:45,999 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.3ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 10:53:45,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-06 10:53:46,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-05-06 10:53:46,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 59 states have internal predecessors, (61), 20 states have call successors, (20), 15 states have call predecessors, (20), 14 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 10:53:46,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 99 transitions. [2021-05-06 10:53:46,003 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 99 transitions. Word has length 76 [2021-05-06 10:53:46,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:46,003 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 99 transitions. [2021-05-06 10:53:46,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 10:53:46,003 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 99 transitions. [2021-05-06 10:53:46,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-06 10:53:46,004 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:46,004 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:46,226 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 10:53:46,227 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:46,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:46,227 INFO L82 PathProgramCache]: Analyzing trace with hash -338887002, now seen corresponding path program 2 times [2021-05-06 10:53:46,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:46,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436290816] [2021-05-06 10:53:46,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:46,232 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:46,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [845824226] [2021-05-06 10:53:46,233 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 [2021-05-06 10:53:46,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:53:46,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:53:46,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 10:53:46,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:46,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:46,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:46,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:46,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:46,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:46,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:46,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:46,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:46,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:46,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:46,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:46,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:46,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:46,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:46,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:46,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:46,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:46,455 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 72 proven. 260 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-05-06 10:53:46,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:46,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436290816] [2021-05-06 10:53:46,456 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:46,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845824226] [2021-05-06 10:53:46,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845824226] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:53:46,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:53:46,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 10:53:46,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089140742] [2021-05-06 10:53:46,456 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 10:53:46,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:46,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 10:53:46,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:53:46,457 INFO L87 Difference]: Start difference. First operand 93 states and 99 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 7 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2021-05-06 10:53:46,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:46,537 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2021-05-06 10:53:46,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 10:53:46,538 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 7 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 89 [2021-05-06 10:53:46,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:46,539 INFO L225 Difference]: With dead ends: 99 [2021-05-06 10:53:46,539 INFO L226 Difference]: Without dead ends: 99 [2021-05-06 10:53:46,539 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 46.8ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-06 10:53:46,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-05-06 10:53:46,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-05-06 10:53:46,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 64 states have internal predecessors, (66), 20 states have call successors, (20), 16 states have call predecessors, (20), 15 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 10:53:46,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 104 transitions. [2021-05-06 10:53:46,543 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 104 transitions. Word has length 89 [2021-05-06 10:53:46,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:46,543 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 104 transitions. [2021-05-06 10:53:46,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 7 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2021-05-06 10:53:46,543 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 104 transitions. [2021-05-06 10:53:46,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-06 10:53:46,544 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:46,544 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:46,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:53:46,761 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:46,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:46,761 INFO L82 PathProgramCache]: Analyzing trace with hash -985330047, now seen corresponding path program 9 times [2021-05-06 10:53:46,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:46,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790865595] [2021-05-06 10:53:46,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:46,767 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:46,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [220468078] [2021-05-06 10:53:46,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:53:46,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 10:53:46,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:53:46,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 10:53:46,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:47,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:47,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:47,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:47,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:47,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:47,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:47,087 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 109 proven. 2 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2021-05-06 10:53:47,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:47,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790865595] [2021-05-06 10:53:47,088 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:47,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220468078] [2021-05-06 10:53:47,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220468078] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:53:47,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:53:47,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 10:53:47,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609904634] [2021-05-06 10:53:47,088 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 10:53:47,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:47,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 10:53:47,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:53:47,089 INFO L87 Difference]: Start difference. First operand 99 states and 104 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 10:53:47,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:47,310 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2021-05-06 10:53:47,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 10:53:47,311 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 89 [2021-05-06 10:53:47,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:47,311 INFO L225 Difference]: With dead ends: 98 [2021-05-06 10:53:47,311 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 10:53:47,311 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 88.5ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 10:53:47,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 10:53:47,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 10:53:47,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 10:53:47,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 10:53:47,312 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 89 [2021-05-06 10:53:47,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:47,312 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 10:53:47,312 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 10:53:47,312 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 10:53:47,312 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 10:53:47,513 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 10:53:47,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 10:53:47 BasicIcfg [2021-05-06 10:53:47,517 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 10:53:47,517 INFO L168 Benchmark]: Toolchain (without parser) took 9608.77 ms. Allocated memory was 187.7 MB in the beginning and 241.2 MB in the end (delta: 53.5 MB). Free memory was 153.0 MB in the beginning and 193.1 MB in the end (delta: -40.2 MB). Peak memory consumption was 14.4 MB. Max. memory is 8.0 GB. [2021-05-06 10:53:47,517 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 187.7 MB. Free memory is still 169.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 10:53:47,517 INFO L168 Benchmark]: CACSL2BoogieTranslator took 187.88 ms. Allocated memory is still 187.7 MB. Free memory was 152.8 MB in the beginning and 171.8 MB in the end (delta: -19.0 MB). Peak memory consumption was 17.5 MB. Max. memory is 8.0 GB. [2021-05-06 10:53:47,517 INFO L168 Benchmark]: Boogie Preprocessor took 55.01 ms. Allocated memory is still 187.7 MB. Free memory was 171.8 MB in the beginning and 170.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 10:53:47,518 INFO L168 Benchmark]: RCFGBuilder took 366.76 ms. Allocated memory is still 187.7 MB. Free memory was 170.2 MB in the beginning and 155.3 MB in the end (delta: 15.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-06 10:53:47,518 INFO L168 Benchmark]: IcfgTransformer took 30.77 ms. Allocated memory is still 187.7 MB. Free memory was 155.3 MB in the beginning and 154.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 10:53:47,518 INFO L168 Benchmark]: TraceAbstraction took 8961.05 ms. Allocated memory was 187.7 MB in the beginning and 241.2 MB in the end (delta: 53.5 MB). Free memory was 153.5 MB in the beginning and 193.1 MB in the end (delta: -39.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-06 10:53:47,518 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 187.7 MB. Free memory is still 169.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 187.88 ms. Allocated memory is still 187.7 MB. Free memory was 152.8 MB in the beginning and 171.8 MB in the end (delta: -19.0 MB). Peak memory consumption was 17.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 55.01 ms. Allocated memory is still 187.7 MB. Free memory was 171.8 MB in the beginning and 170.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 366.76 ms. Allocated memory is still 187.7 MB. Free memory was 170.2 MB in the beginning and 155.3 MB in the end (delta: 15.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 30.77 ms. Allocated memory is still 187.7 MB. Free memory was 155.3 MB in the beginning and 154.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 8961.05 ms. Allocated memory was 187.7 MB in the beginning and 241.2 MB in the end (delta: 53.5 MB). Free memory was 153.5 MB in the beginning and 193.1 MB in the end (delta: -39.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 8916.0ms, OverallIterations: 18, TraceHistogramMax: 14, EmptinessCheckTime: 22.8ms, AutomataDifference: 1844.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 557 SDtfs, 128 SDslu, 1717 SDs, 0 SdLazy, 1051 SolverSat, 114 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1040.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 810 GetRequests, 699 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 891.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=99occurred in iteration=17, InterpolantAutomatonStates: 129, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 136.9ms AutomataMinimizationTime, 18 MinimizatonAttempts, 9 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 133.6ms SsaConstructionTime, 573.2ms SatisfiabilityAnalysisTime, 2276.9ms InterpolantComputationTime, 812 NumberOfCodeBlocks, 741 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 794 ConstructedInterpolants, 0 QuantifiedInterpolants, 2528 SizeOfPredicates, 36 NumberOfNonLiveVariables, 2665 ConjunctsInSsa, 221 ConjunctsInUnsatCore, 18 InterpolantComputations, 5 PerfectInterpolantSequences, 1501/2065 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...